Answers
Answer:
M a = (M1 + M2) a = F Newton's Second Law
F = (M2 - M1) g net force on the system
a = (M2 - M1) / (M1 + M2) g
a = (9 - 7) / (9 + 7) g = 2 / 16 * 10.0 m/s^2 = 1.25 m/s^2
Related Questions
How does the law of conservation of mass apply to this reaction: C2H4 + O2 → 2H2O + 2CO2?
Answers
Answer:
The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydrogen or carbon. ... There is an equal number of each element on both sides of the equation.
Explanation:
Where in memory would a static integer variable be stored? Explain why. Write a C program which dynamically allocates memory to define a float array with 10 entries by using the malloc function. Do not forget to free the memory in the end of your program. What happens if you attempt to print your array before and after freeing memory?
Answers
A static integer variable in C is stored in the data segment of the memory. The data segment is a portion of memory that contains static and global variables, which are initialized before the program starts execution. Static variables have a fixed memory location throughout the program's execution, and their values persist between function calls.
Here's a C program that dynamically allocates memory to define a float array with 10 entries using the malloc function and frees the allocated memory at the end:
#include <stdio.h>
#include <stdlib.h>
int main() {
float* array = (float*)malloc(10 * sizeof(float)); // Dynamically allocate memory
if (array == NULL) {
printf("Memory allocation failed.\n");
return 1;
}
// Access and manipulate the allocated memory
for (int i = 0; i < 10; i++) {
array[i] = i * 1.5;
}
// Print the array before freeing memory
printf("Array before freeing memory:\n");
for (int i = 0; i < 10; i++) {
printf("%.2f ", array[i]);
}
printf("\n");
free(array); // Free the dynamically allocated memory
// Print the array after freeing memory
printf("Array after freeing memory:\n");
for (int i = 0; i < 10; i++) {
printf("%.2f ", array[i]);
}
printf("\n");
return 0;
}
In this program, the malloc function is used to allocate memory dynamically for an array of 10 floats. The sizeof(float) is multiplied by the number of elements (10) to allocate the appropriate amount of memory.
Before accessing the allocated memory, we check if the memory allocation was successful. If malloc returns NULL, it means the allocation failed, and an appropriate error message is printed.
We then proceed to access and manipulate the allocated memory by assigning values to each element of the array.
Next, we print the array before freeing the memory and then call the free function to release the allocated memory.
Finally, we attempt to print the array again after freeing the memory. However, this is undefined behavior because the memory has already been freed. It may result in accessing invalid memory locations or produce unpredictable results. Therefore, trying to print the array after freeing the memory is not recommended and may lead to unexpected program behavior.
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during a hockey game, a puck is given an initial speed of 10 m/s. it slides 50 m on the horizontal ice before it stops due to friction. what is the coefficient of kinetic friction between the puck and the ice? group of answer choices 0.40 0.20 0.50 0.30 0.10
Answers
The coefficient of kinetic friction between the puck and the ice is 0.10
What is the coefficient of kinetic friction?
It is the ratio of the friction force to the normal force experienced by a body moving on a dry, non-smooth surface.
How to calculate the coefficient of kinetic friction?
v²-u²=2as
0-(10)²=2*a*50
a = 1m/s²
F = uN (N=mg)
ma = umg
u = a/g = 1/9.8 = 0.10
Therefore, the coefficient of kinetic friction between the puck and the ice is 0.10
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kohler's circle problem in which the task is to determine____
Answers
Kohler's circle problem is a visual perception task that involves determining the missing part of a circle when a portion of it is obscured by another object.
The task is to determine the size and position of the missing portion of the circle based on the visible part of the circle and the surrounding context. The problem is often used in cognitive psychology to study visual perception and problem-solving abilities.
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if a gas produced, most likely a ______ reaction took place
Answers
Answer:
if a gas produced, most likely a chemical reaction took place
Explanation:
Answer:
if a gas produced, most likely a Chemical reaction took place
Explanation:
hope this helps and have a good day <3
Question 3
A stone weighing 5 newtons falls freely from a cliff 44 meters
high. The stone is accelerated at approximately
А 5 m/sec2
C 44 m/sec
B 10 m/sec2
D 220 m/sec
Answers
Based on scientific data, the stone is accelerated at approximately 10 \(m/s^2\).
Given the following data:
Weight = 5 NewtonHeight = 44 meters.What is gravity?Gravity can be defined as a force of attraction that controls the movement of the planets such as Earth around the Sun.
This ultimately implies that, gravity is a universal force of attraction that acts between all objects or matter that are having both mass and energy, and can occupy space.
Gravity on planet EarthFurthermore, the gravity near the Earth's surface generally makes it possible for all physical objects such as stones to possess weight and experience a free fall.
According to astronomical records, the acceleration due to gravity for an object experiencing a free fall near the Earth's surface is 9.8 \(m/s^2\).
In this scenario, the stone is accelerated at approximately 10 \(m/s^2\).
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Calculate the change in momentum of a 45 kg runner who starts out at 1 m/s and speeds up to 3 m/s. Which anser choice is correct 90 kg⋅m/s 45 kg⋅m/s 135 kg⋅m/s 0 kg⋅m/s
Answers
momentum can also be defined in terms of newton second
that is P=F.V
now v =vf-vi
v=3 m/s-1m/s=2 m/s
now F=W=45 kg
therefore
change in momentum=F.v
P=45*2=90 kg.m/s
Low-energy lightbulbs currently cost $3.60, have a life of 9 years, and currently use $2.00 of electricity per year. Conventional lightbulbs are cheaper to buy; they currently cost only $0.60. On the other hand, they last only 1 year and currently use $7.00 of electricity per year. If the real discount rate is 4%, what are the EACs for each lightbulb? Which lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb? a. EAC( Low-energy lightbulb )=2.48 EAC( Conventional lightbulb )=7.62 Low-energy lightbulb is cheaper to operate b. EAC( Low-energy lightbulb )=3.60 EAC( Conventional lightbulb )=0.60 Conventional lightbulb is cheaper to operate c. EAC( Low-energy lightbulb) =2.00 EAC( Conventional lightbulb )=7.33 Low-energy lightbulb is cheaper to operate d. EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate
Answers
EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D
Energy cost calculationTo calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.
The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.
For the low-energy lightbulb:
EAC = Cost of bulb + Present value of annual electricity cost
= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)
≈ $18.47
For the conventional lightbulb:
EAC = Cost of bulb + Present value of annual electricity cost
= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)
≈ $7.33
Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.
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Which of the following is an example of an energy transfer?
Elastic energy becomes kinetic energy as a ball bounces
OA billiard ball collides with a second billiard ball which is initially at rest, making it move.
Answers
Elastic potential energy is initially at rest, making it move.
Elastic potential energy is what causes a ball to bounce or rebound because it is transformed into kinetic energy and used to raise the ball back up. However, because some of the ball's energy was transferred to the ground or changed into sound (in the noise it makes upon impact) and heat energy, the ball won't go as high as it did at first (friction with the table). Additionally, even though we cannot see it, the ball alters once it strikes the ground or a table, energy is needed to take shape for a brief period of time.
Because of this, each bounce has a slightly lower height than the one before it. The ball has some kinetic energy when it hits the floor, but some of it is changed, so it loses some of it each time it bounces. After a few bounces, the ball has so little kinetic energy remaining that it stops bouncing.
Thus the correct answer is option A.
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Three liquids are at temperatures of 9 ◦C,
23◦C, and 38◦C, respectively. Equal masses of
the first two liquids are mixed, and the equilibrium temperature is 14◦C. Equal masses of
the second and third are then mixed, and the
equilibrium temperature is 35.4
◦C.
Find the equilibrium temperature when
equal masses of the first and third are mixed.
Answer in units of ◦C.
Answers
The equilibrium temperature when equal masses of the first and third liquids are mixed is 26°C.
To find the equilibrium temperature when equal mass of the first and third liquids are mixed, we can use the principle of heat transfer. When two substances with different temperatures are mixed, heat will flow from the warmer substance to the cooler substance until they reach thermal equilibrium.
Using the given information, we know that the first two liquids have an initial temperature difference of 14-9=5°C, and the second and third liquids have an initial temperature difference of 35.4-23=12.4°C. When the equal masses of the first and third liquids are mixed, they will also have an initial temperature difference of 38-9=29°C.
To find the final equilibrium temperature, we can set up the equation:
(mass of first liquid)(5°C) + (mass of third liquid)(29°C) = (total mass)(final temperature difference)
Since equal masses are mixed, we can simplify this to:
(mass)(17°C) = (mass)(final temperature difference)
Solving for the final temperature difference, we get:
final temperature difference = 17°C
Adding this to the initial temperature of the cooler liquid (9°C), we get the final equilibrium temperature:
9°C + 17°C = 26°C
Therefore, the equilibrium temperature when equal masses of the first and third liquids are mixed is 26°C.
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The equilibrium temperature is 26°C when the first and third liquids are joined in equal masses.
We may apply the theory of heat transfer to determine the equilibrium temperature when the first and third liquids are combined in equal amounts. Heat will transfer from one substance to the other when two substances with differing temperatures are combined until they attain thermal equilibrium.
The first two liquids have an initial temperature difference of 14-9=5°C, while the second and third liquids have an initial temperature difference of 35.4-23=12.4°C, according to the information provided.Due to the same masses of the first and third liquids, their initial temperatures will differ by 38-9=29°C when combined.
To find the ultimate equilibrium temperature, we can build the equation.
The formula is (total mass)(final temperature difference) = (mass of first liquid)(5°C) + (mass of third liquid)(29°C).
Equal masses are mixed together, thus we can summarise this as follows:
Mass times final temperature difference is mass times (mass)(17°C).
The ultimate temperature difference is determined as follows:
17°C is the difference in final temperature.
This is added to the 9°C beginning temperature of the cooler liquid to determine the ultimate equilibrium temperature:
9°C + 17°C = 26°C
26°C is the equilibrium temperature when the combined masses of the first and third liquids are equal.
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Why are thire only large impact craters on Venus?
A. There are only large impact craters on Venus because only large meteors and asteroids survive their fall through the planet's thick and corrosive atmosphere.
B. There are only large impact craters on Venus because geological activity erodes impact craters over time.
C. There are only large impact craters on Venus because most smaller asteroids and meteors have been cleared out of the inner solar system over the last few billion years.
D. There are only large impact craters on Venus because the weather on the planet erodes impact craters over time.
E. There are actually impact craters of all sizes on the surface of Venus.
Answers
Venus has large impact craters due to the absence of erosive forces and the survival of only the largest meteors and asteroids through its thick atmosphere.
Option (A) is correct.
Venus, known as the sister planet of Earth, is characterized by its thick, corrosive atmosphere and extreme temperatures. Its surface lacks water and volcanic activity, and is instead marked by numerous large impact craters. This is due to the absence of erosive forces, like water, which would have gradually eroded the craters over billions of years. The craters formed on Venus as a result of asteroid and comet impacts over the past 4.6 billion years. However, the impact process on Venus differs from that on Earth. Venus' thick atmosphere burns up most smaller meteorites and asteroids upon entry, allowing only the largest ones to survive their descent. Consequently, only the large impact craters remain visible on the planet's surface today. Therefore, option (A) is correct. In summary, Venus bears only large impact craters as a consequence of the survival of substantial meteors and asteroids through its thick and corrosive atmosphere.
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pls do question 1 part d). tysm
Answers
Answer:
c
Explanation:
cuz its informing the length of 5 and weight on 20N
if our significance level is 5 nd our p-value is calculated as 0.016 we should _____.
Answers
Based on a significance level of 5% and a calculated p-value of 0.016, we should reject the null hypothesis in favor of the alternative hypothesis.
When conducting a hypothesis test, if our significance level is 5% (0.05) and our calculated p-value is 0.016, we compare the p-value to the significance level to make a decision regarding the null hypothesis.
Null hypothesis: There is no significant effect or relationship.
Alternative hypothesis: There is a significant effect or relationship.
In this case, the significance level is 5% or 0.05.
The p-value is the probability of obtaining a result as extreme or more extreme than the observed data, assuming the null hypothesis is true. In our case, the calculated p-value is 0.016.
If the p-value is less than the significance level (p < α), we reject the null hypothesis.
If the p-value is greater than or equal to the significance level (p ≥ α), we fail to reject the null hypothesis.
In our scenario, the calculated p-value of 0.016 is less than the significance level of 0.05. Therefore, we have sufficient evidence to reject the null hypothesis. This indicates that there is a statistically significant effect or relationship.
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the only two forces acting on a body have magnitudes of 20 n and 35 n and directions that differ by 80. the resulting acceleration has a magnitude of 20 m/s2. what is the mass of the body?
Answers
Answer:
the mass of the body is 2.75 kg
chegg two speakers a and b are 3.50 m apart, and each one is emitting a frequency of 444 hz. however, because of signal delays in the cables, speaker a is one-fourth of a period ahead of speaker b.
Answers
Speaker A is emitting the sound 0.0005625 seconds ahead of speaker B due to signal delays in the cables.
The two speakers, A and B, are located 3.50 meters apart. Each speaker is emitting a frequency of 444 Hz. However, due to signal delays in the cables, speaker A is one-fourth of a period ahead of speaker B.
To find the time difference between the two speakers, we need to calculate the period of the wave. The period is the time it takes for one complete cycle of the wave.
We know that the frequency of each speaker is 444 Hz. The formula for the period is T = 1/f, where T is the period and f is the frequency.
Using this formula, we can find the period of the wave: T = 1/444 Hz = 0.00225 seconds.
Since speaker A is one-fourth of a period ahead of speaker B, we can calculate the time difference between the two speakers. One-fourth of the period is 0.00225 seconds / 4 = 0.0005625 seconds.
Therefore, the conclusion in one line is that speaker A is emitting the sound 0.0005625 seconds ahead of speaker B due to signal delays in the cables.
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what class lever is a chest pass in netball?
Answers
Answer:
BASETBALL
Explanation:
how might have hot jupiters gotten so close to the stars they orbit?
Answers
Hot Jupiters are a type of exoplanet that are large gas giants similar in size to Jupiter but are located much closer to their host stars, with orbital periods of only a few days. It is believed that these planets did not form in their current close-in location but instead migrated inwards from where they originally formed.
One possible explanation for their migration is a process called disk migration. This occurs when a planet interacts with the gas and dust in the protoplanetary disk it formed from, causing it to spiral inwards towards its host star. Another possibility is planet-planet scattering, where interactions between planets in a system cause one or more planets to be ejected from their original orbit and move closer to their host star.
In addition, gravitational interactions with other planets or nearby stars can also cause a planet's orbit to become more eccentric, leading to the planet passing closer to its host star at periastron.
Overall, there are several potential mechanisms for hot Jupiters to have migrated so close to their host stars, and ongoing research continues to shed light on this fascinating phenomenon.
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a rock is thrown upward with a velocity of 12 meters per second from the top of a 42 meter high cliff, and it misses the cliff on the way back down. when will the rock be 12 meters from ground level?
Answers
The rock will be 12 meters from the ground level after it has been thrown upward with a velocity of 12 meters per second from the top of the 42 meter high cliff for a total of 3.5 seconds.
What is the cliff?The cliff is the height that generally has the highest height and it can be mountains, stones, buildings.
This is because the total time taken for the rock to fall back down will be the same as the total time taken for the rock to reach the top of the cliff. The equation used to calculate this is: time = distance / velocity. Therefore:
Time = 42 meters (cliff height) / 12 meters per second (velocity) = 3.5 seconds.
So, the rock will be 12 meters from the ground level after 3.5 seconds.
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imagine you live in a town near the foot of a volcano. what indicators might you look for to predict when the volcano might erupt?
Answers
Answer:
i don't really know the exact answer but i would say something like earthquakes or steam/excessive heat
Explanation:
A 19.7 kg sled is pulled with a 42.0 N force at a 43.0° angle, across ground where μ₁ = 0.130.
What is the normal force on the sled?
Answers
The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.
Let us examine each of the forces acting on the sled.The weight of the sled is equal to its mass multiplied by the acceleration due to gravity. Therefore, the weight of the sled is:mg = 19.7 kg x 9.8 m/s² = 193.06 N.The force exerted on the sled can be divided into two components: one that is parallel to the ground and one that is perpendicular to the ground.The force parallel to the ground is:F₁ = 42.0 N x cos(43.0°) = 30.56 N.The force perpendicular to the ground is:F₂ = 42.0 N x sin(43.0°) = 28.30 N.The frictional force is equal to the coefficient of friction multiplied by the normal force. Therefore, we need to find the normal force on the sled in order to calculate the frictional force. Since the sled is not accelerating vertically, the normal force is equal to the weight of the sled plus the force perpendicular to the ground. Therefore, N = mg + F₂N = 193.06 N + 28.30 N = 221.36 N.The frictional force is:Fr = μ₁ x NFr = 0.130 x 221.36 N = 28.77 N.Thus, the normal force exerted on the sled is 221.36 N.For such more question on perpendicular
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hello what is quantum physics
Answers
Answer:
It is a fundamental theory in physics that provides a description of the physical properties of nature at the scale of atoms and subatomic particles.
What specific type of tide has the smallest difference between high and low tide?
Answers
Answer: Neap tides
Explanation: Neap tides are tides that have the smallest tidal range, and they occur when the Earth the Moon, and the Sun form a 90o angle. They occur exactly halfway between the spring tides when the Moon is at first or last quarter.
Is gas matter? How do you know? Hint: Remember there are 2 things we need to be considered matter.
please help me understand, brainly doesn't have science and I wish it did.
Answers
Answer:
Gas is a state of matter that has no fixed shape and no fixed volume.
In addition to solids and liquids, gases are also a physical state in which matter can occur. All gases have weight. Unlike solids and liquids, gases will occupy the entire container that encloses them.
matter is "anything that has mass and volume (occupies space)
Gases have mass. The space between gas particles is empty. Gases can be formed as products in chemical reactions. Gas particles can form bonds between them under certain conditions
Gases have volume which isn't fixed (no fixed volume) and no fixed shape. Gases expand to fill the space available. They can also be compressed into a very small space.
Explanation:
How much work is done by gravity to cause a 12.0 kg stone to drop from a height of 22.0 m to a height of 3.00 m?
Answers
Answer:
Work done is 2280 Joules.
Explanation:
Work done can be found using the formula
\(W=Fs\\\)
where:
W is work done ( in Joules)
F is force ( in Newtons)
s is displacement ( in Meters)
Assuming we are on Earth, we can find the force acting on the object using the mass with the following:
Mass × 10 = Force
12.0 × 10 = 120N
Moreover, we can find displacement by simply subtracting the final distance from the starting distance:
22.0m - 3.00m = 19.0m
Therefore,
\(W = Fs\)
\(W = 120N\) × \(19m\)
\(W= 2280J\)
Which of the following is not a benefits of improved flexibility?
A. it helps prevent injuries
B. It makes you muscles stronger
C. It improves your range of emotions
D. It helps prepare your body for workouts
Answers
My mass is 65 kg and on Earth this equals a weight of 640 N, but on the moon where gravity is 1.7 m/s² my
weight would be
a. 640 N
b. 380 N
c. 110 N
d. no way to know without going there
Answers
Your weight on the moon given the data from the question is 110.5 N
Definition of mass and weightMass is simply defined as the quantity of matter present in an object. The mass of an object is constant irrespective of the location of the object.
Weight is simply defined as the gravitational pull on an object. The weight of an object varies from place to place due to gravity.
Relationship between mass and weightMass and weight are related according to the following equation
Weight (W) = mass (m) × Acceleration due to gravity (g)
How to determine the weight on the moonMass (m) = 65 KgAcceleration due to gravity on the moon (g) = 1.7 m/s²Weight (W) =?W = mg
W = 65 × 1.7
W = 110.5 N
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What is the energy of a single photon of visible light with a wavelength of 500.0 nm? 1 nm=10^−9 m
1. 3.97×10^−19 J
2. 84×10^14 J
2. 02×10^18 J
4. 95×10^−19 J
Answers
Answer:
3.97×10^−19 J
From the planks equation
E=hv
V= c/ wave length
V= 3×10^8/500×10^-9
=6×10^14
E= hv
6.63×10^-34×6×10^14
= 3.97×10^−19 J
Explanation:
Ok so I am taking a test I need help please
Answers
Answer:
i know its definetly either clockwise or counter clockwise
Explanation:
a 2 kg block pulled with a force of 8 n accelorates at 2.5 m/s what is the friction
Answers
If the pulling is done parallel to the ground, we have by Newton's second law
8 N + (-f ) = (2 kg) (2.5 m/s²)
where f is the magnitude of the friction force. Solve for f :
8 N - f = 5 N
f = 3 N
which of the following statements are true concerning sign conventions for image formation? check all that apply. which of the following statements are true concerning sign conventions for image formation?check all that apply. a converging lens has a negative focal length; a diverging lens has a positive focal length. for an upright image, the magnification is positive; for an inverted image, the magnification is negative. a virtual image has a positive image distance; a real image has a negative image distance. when the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative. when the center of curvature of a spherical mirror is on the same side as the reflected light, the radius of curvature is positive; otherwise, it is negative.
Answers
The following statements are true concerning sign conventions for image formation:
A converging lens has a negative focal length; a diverging lens has a positive focal length.For an upright image, the magnification is positive; for an inverted image, the magnification is negative.A virtual image has a positive image distance; a real image has a negative image distance.When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive; otherwise, it is negative.A converging lens causes parallel light rays to converge to a focal point in front of the lens, so the focal length is negative. For an upright image, the magnification is positive because the image is larger than the object and the image is erect, whereas for an inverted image, the magnification is negative because the image is smaller than the object and the image is upside-down.
A virtual image is formed when light appears to be coming from a point behind the mirror or lens, so the image distance is positive; a real image is formed when light actually converges at a point in front of the mirror or lens, so the image distance is negative. When the object is on the same side of the reflecting or refracting surface as the incoming light, the object distance is positive because it is measured from the lens or mirror, whereas when it is on the opposite side, the object distance is negative because it is measured from the focal point.
The statement "when the center of curvature of a spherical mirror is on the same side as the reflected light, the radius of curvature is positive; otherwise, it is negative" is incorrect. The sign convention for the radius of curvature of a spherical mirror is that it is positive when the center of curvature is on the opposite side of the mirror from the object, and negative when it is on the same side as the object.
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