Today's topic
( read the instructions before solve this question. The instructions is after the question)
{PHYSICS}
• What do you understand by the motion of an object?
• What is uniform and non uniform motion?
{INSTRUCTIONS FOR THIS QUESTION}
• This question is from high school student.
• Need only logical answer.
• Nonsense answer will be reported.
• If you solve this question you gain 10 pts.
Answers
Answer:
While a body is said to be in motion if it changes its position with respect to immediate surroundings.
A body is said to be in uniform motion if it covers equal distances in equal interval of time.
A body is said to be in non-uniform motion if it covers unequal distances in equal interval of time or vice-versa
Related Questions
A weightlifter curls a 25 kg bar, raising it each time a distance of 0.50 m. How many times must he repeat this exercise to burn off the energy in one slice of pizza? Assume 25% efficiency. Energy content of one slice of pizza is 1260 kJ .
Answers
42 times must he repeat this exercise to burn off the energy in one slice of pizza.
What is energy?
Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
Energy burn by the weightlifter = potential energy
Potential energy = mgh
Potential energy = 25.(9.8)(0.50)
Potential energy = 122.5 Joule.
Assume 25% of efficiency so energy burn = 122.5*25/100
energy burn = 30.625 joule
Number of times = 1260/30.625
Number of times = 42 times.
42 times must he repeat this exercise to burn off the energy in one slice of pizza.
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A sphere has a surface uniformly charged with 3.30 C. At what distance from its center is the potential 4.50 MV
Answers
Answer:
r = 6.6 x 10³ m = 6600 m
Explanation:
The potential at a distance from a charged sphere can be given as follows:
\(V = \frac{kq}{r}\\\\r = \frac{kq}{V}\)
where,
r = distance = ?
k = Colomb Constant = 9 x 10⁹ Nm²/C²
q = charge on sphere = 3.3 C
V = potential = 4.5 MV = 4.5 x 10⁶ V
Therefore,
\(r = \frac{(9\ x\ 10^9\ Nm^2/C^2)(3.3\ C)}{4.5\ x\ 10^6\ V}\)
r = 6.6 x 10³ m = 6600 m
When you attempt to swim, you brush your hands in a wide motion to push the water around you back behind you. This in turn, causes the water around you to push your forward. Which of Newton's Laws would explain this action? a. Newton's First Law b. Newton's Second Law c. Newton's Third Law d. None of Newton's Laws
Answers
Answer:
C. Newton's 3rd law
Explanation:
Swimmers must stroke downward in the water to stay afloat and propel forward. This movement is equal and opposite to the force the water exerts against the swimmer to stop them from moving.
Answer:
c. Newton's Third Law
Explanation:
I got it correct on the test
18. Compared to its weight on Earth, a 5 kg object on the moon will weigh A. the same amount. B. less. C. more.
Answers
Answer:
B. less
Explanation:
acceleration due to gravity on Earth, g = 9.8 m/s²
acceleration due to gravity on Moon, g = 1.6 m/s²
Given mass of the object as, m = 5 kg
Weight of an object is given as, W = mg
Weight of the object on Earth, W = 5 x 9.8 = 49 N
Weight of the object on Moon, W = 5 x 1.6 = 8 N
Therefore, the object weighs less on the moon compared to its weight on Earth.
The correct option is "B. less"
A block of mass 5 kg slides down an inclined plane that has an angle of 10. If the inclined plane has no friction and the block starts at a height of 0.8 m, how much kinetic energy does the block have when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2
Answers
The kinetic energy of the block when it reaches the bottom is 39.2 J.
Kinetic energy of the block at the bottom
Apply the principle of conservation of energy.
K.E(bottom) = P.E(top)
P.E(top) = mgh
where;
m is mass of the blockg is acceleration due to gravityh is the vertical height of fallP.E(top) = 5 x 9.8 x 0.8
P.E(top) = K.E(bottom) = 39.2 J
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This diagram shows a stationary box sitting on the floor. Which statements about the other force exerted on the box are
true?
gravitational force
O It's a normal force exerted by the floor. It balances the gravitational force.
O It's a friction force exerted by the floor. It balances the gravitational force.
O It's a normal force exerted by the floor. It doesn't balance the gravitational force.
d from the left. It doesn't balance the gravitational force.
Answers
It's a normal force exerted by the floor. It balances the gravitational force. Option A is correct. The normal force is balanced by the gravitational force.
What is the friction force?
It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N). Mathematically it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and accelertaion in the different components and balancing the equation gets components in the y-direction.
The normal force is balanced by the gravitational force. It's a normal force exerted by the floor. It balances the gravitational force.
Hence, option A is correct.
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Calculate the net force (N) acting
on an object with the following: 5 N
to the right and 10 N to the left.
Answers
Answer:
Explanation:
its unbalanced
in the figure a plane mirror MN of height h is mounted in an adjustable vertical position on vertical wall E is an observers eye which is 1 m from the wall and 1.5 above the ground PQ is a vertical post of height 3 m and is 4 m behind the observer. looking into the mirror the observer can see the whole image of the post what’s the minimum value of h
Answers
The minimum value of h is 3.75 meters.
To determine the minimum value of h, we need to consider the geometry of the situation.
From the given information, we know that the observer's eye is 1 m from the wall and 1.5 m above the ground. The vertical post-PQ is 3 m tall and located 4 m behind the observer. The observer can see the whole image of the post in the mirror.
Since the observer can see the entire image of the post, we can conclude that the line of sight from the top of the post to the observer's eye must be parallel to the line of sight from the bottom of the post to the observer's eye. This is because the mirror reflects light rays at equal angles of incidence and reflection.
Let's denote the height of the observer's eye from the ground as x. We can set up a proportion to find the height of the image of the post in the mirror:
(Height of post-PQ) / (Distance from observer to post) = (Height of the image in the mirror) / (Distance from mirror to image)
Using the given values, we have:
3 m / 4 m = h / (4 m + 1 m)
Simplifying the equation:
3/4 = h/5
Cross-multiplying:
4h = 15
h = 15/4 = 3.75 m
Therefore, the minimum value of h is 3.75 meters.
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Which of the following is NOT true about the structure of the nucleus? a. The nucleus is filled with cytoplasm b. The nucleus has nuclear pores that control what enters and exits c. The genetic material in the nucleus is called chromatin d. The nucleus is surrounded by a double layer membrane.
Answers
Answer:
A. The nucleaus is filled with cytoplasm OR d. The nucleus is by a double layer membrane.
Explanation:
b. and c. are true and I'm certain they are true
a. I know the inside of a cell has cytoplasm but I'm not sure if the inside of a nucleus is filled with cytoplasm. And d. I'm not so sure, so it's either a or d. Hope this helps!
Mass is the amount of matter in an
object. Which statement is true?
A. A person's mass on the moon is less than it is on
Earth.
B. Whether on the Earth or the moon, a person's mass
is the same.
C. Gravity changes the amount of matter there is in an
object.
D. Mass is the same thing as weight.
Answers
N2O is the chemical formula of a covalent compound used in the production of whipping cream. The elements that
make up this compound are nitrogen and oxygen.
What is the name of the second element in the chemical name of this compound?
Answers
N₂O: Nitrous oxide
oxygen
Light from red, green and blue spotlights shine on asheet of paper. The paper contains cyan and magentapigments. Which of the three primary light colors will bereflected by the pigments?1.Red and Green2.Red3.Red and Blue4.Blue and Green5.Green6.Blue
Answers
Given:
Light from red, green and blue spotlights shine on a sheet of paper.
The paper contains cyan and magenta pigments.
To find:
The reflected pigments
Explanation:
We know, magenta is a mixture of red and blue colour and cyan is a mixture of blue and green colour.
Magenta will reflect the red and blue while cyan will reflect the blue and the green colours.
But the blue colour is common among the two colours so, neither magenta nor the cyan will absorb the blue colour.
Hence, the reflected pigment is blue only.
***ECONOMICS***
A government that wants to increase its GDP would most likely take which
action?
A. Increase the money supply to make it easier to borrow money
Ο Ο
B. Decrease the money supply to slow the growth of inflation
C. Increase taxes on businesses that operate outside the country
O O
D. Decrease taxes on citizens who are poor or unemployed
Answers
Answer:
The correct answer is A. A government that wants to increase its GDP would most likely increase the money supply to make it easier to borrow money.
Explanation:
If the government wanted to increase its GDP, the most appropriate way to do so would be to increase the money supply both through issuance and through a reduction in bank reserve requirements, thereby increasing the circulating money in the hands of society.
This, in turn, would make citizens reinvest that money, increasing economic production and, therefore, the national GDP.
Answer: A. Increase the money supply to make it easier to borrow money
Explanation: I just took the test on Ap ex
2. What is the missing piece for the energy transformation for a flashlight? *
Chemical > Electrical > BLANK
& Thermal
Answers
The missing piece for the energy transformation for a flashlight is "Light" or "Radiant" energy. Chemical > Electrical > light & Thermal
What is meant by energy transformation?Energy transformation is also known as energy conversion. It is the process of changing energy from one form to another. In physics, energy is a quantity that provides capacity to perform work or moving or provides heat.
The complete energy transformation for a flashlight is as :
Chemical (stored in the battery) > Electrical (when the battery powers the bulb) > Light/Radiant (when the bulb emits light) & Thermal (some of the energy is lost as heat due to resistance in the bulb and the circuit).
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1. Amplitude is the maximum distance that the particles in a medium _____
2. A Wavelenght of a wave is the distance from ____
3. As the frequency of a wave increases, the wavelengths ___
4. The frequency of a wave is the number of ___
5. Changing the frequency of waves also changes ___
Answers
Answer:T or F: Mechanical waves need a medium through which to transport energy. ... T or F: Wave A has a greater frequency than wave B, but the amplitude of the two waves is the ... past the raft increases, you also find that the distance between each crest ___. ... For a given wave, the frequency doubles, the wavelength is ____.
Explanation:
If Scobie could drive a Jetson's flying car at a constant speed of 160.0 km/hr across oceans and space, approximately how long would Scoobie take to drive around Earth's equator in days
Answers
Scobie will take 10 days to drive around Earth's equator.
To calculate the time that takes Scobie to drive around Earth's equator we need to find the distance, which is given by the equation of a circumference:
\( d = 2\pi r \)
Where:
r: is the Earth's radius = 6371 km
Then, the distance is:
\( d = 2\pi r = 2\pi*6371 km = 40030.2 km \)
Now, if we divide the above distance by the speed of the car we can find the time:
\( t = \frac{d}{v} = \frac{40030.2 km}{160.0 km/h} = 250.2 h*\frac{1 d}{24 h} = 10 d \)
Therefore, Scobie will take 10 days to drive around Earth's equator.
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definition of momentum
Answers
Answer:
Momentum is a term used in physics to describe an object's resistance to change its motion. It is a measure of an object's mass and velocity and can be mathematically represented by the equation p = mv, where p is momentum, m is mass, and v is velocity.
Momentum is a vector quantity, meaning it has both magnitude and direction. It can be thought of as the amount of motion an object possesses in a particular direction. For example, a large truck traveling at a high speed has more momentum than a small car traveling at a slower speed, even though they both may have the same mass.
In physics, momentum plays a crucial role in determining how objects will react when they collide. If two objects collide and have equal and opposite momentum, they will typically bounce off each other. However, if one object has much more momentum than the other, it is likely to push the other object aside and continue on its original path.
It is also important to note that momentum is conserved in isolated systems. This means that if two or more objects collide or interact with each other, the total momentum before the collision is equal to the total momentum after the collision.
In conclusion, momentum is a fundamental concept in physics that helps to describe and understand the motion of objects. It is a combination of an object's mass and velocity, and it determines how objects will interact when they collide.
Please mark me brainliest if I helped.
What is the difference between classical mechanics and quantum mechanics?
Answers
Classical mechanics describes the motion of objects on a macroscopic scale, while quantum mechanics deals with the behavior of particles on a microscopic scale. Classical mechanics is deterministic, meaning that it predicts precise outcomes based on initial conditions, while quantum mechanics is probabilistic, providing probabilities of different outcomes. Classical mechanics follows the principle of causality, where every effect has a specific cause, whereas quantum mechanics introduces inherent uncertainty and wave-particle duality. Classical mechanics is well-suited for describing everyday objects, while quantum mechanics is necessary to explain the behavior of particles at the atomic and subatomic levels.
~~~Harsha~~~
classical mechanics is the branch of physics that deals with the motion of everyday objects like balls, cars, and planets.
quantum mechanics is a branch of physics that focuses on the behavior of very small particles, such as atoms and subatomic particles like electrons.
If a block is sitting in a shelf 5 foot high and the same size block is sitting on the shelf above it at 6 feet high. Which has more potential energy? Explain your reasoning.
Answers
Answer:
Explanation:
Assuming that not only is the size of the two blocks the same but the MASS is also the same, then the higher block will have more potential energy.
Potential energy is equal to the amount of work required against gravity to position a mass
Work is a force times a distance. PE = W = Fd
As each block has the same mass, they each create the same force which would be their weight mg
PE = W = Fd = mgd
so potential energy is directly proportional to the height of each block
the lower block has potential energy PE = Fd = mg(5)
while the upper block has potential energy PE = mg(6)
above a reference frame origin, possibly the floor.
It is possible that the higher block has less potential energy then the lower block if only the size is considered. If the higher block is a one foot cube of ice at 57.2 lbs and the lower block is a one foot cube of copper at 559 lbs then the lower mass would have much more potential energy because of its much greater mass.
559(5) = 2795 ft•lb of potential energy
57.2(6) = 343.2 ft•lb of potential energy
When 119 J of work is done in pushing a box horizontally 17 m, how much force is applied?
Answers
(1/2)mv^2
where m is the mass of the box and v is its final velocity. Since the box is pushed horizontally, the force applied is in the same direction as the displacement, so the work done is given by:
W = Fd
where F is the force applied and d is the displacement. Setting these two expressions equal to each other, we get:
Fd = (1/2)mv^2
Solving for F, we get:
F = (1/2)(m/d)v^2
We are not given the mass of the box or its final velocity, but we can use the fact that the work done is 119 J and the displacement is 17 m to find the force applied. Plugging in the given values, we get:
F = (1/2)(119 J / 17 m) = 3.5 N
Therefore, the force applied is 3.5 N.
Two monatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The ratio of the average molecular kinetic energy KA / KB is
Answers
Answer: \(\frac{K_{A}}{K_{B}}\) = 1
Explanation: Average molecular kinetic energy for monatomic idela gases is given by:
\(E=\frac{3}{2}RT\)
where
R is gas constant of ideal gas
T is temperature
Which means kinetic energy depnends only on temperature.
Since gas A and gas B are at the same temperature, kinetic energy will be the same. Therefore:
\(\frac{K_{A}}{K_{B}}\) = 1
Ratio of this average molecular kinetic energy is 1.
energy is the energy of moving engine parts.
Mechanical
Electrical
Chemical
Answers
Answer:
mechanical energy is being used
3. Why is the term cold blooded a misconception? Explain
Answers
Answer:
The term “cold-blooded” implies that these animals are in a never-ending struggle to stay warm. That really isn't correct. A cold-blooded animal can warm up their blood by being in the sun for hours.
Mark weighs 375 N and is carrying a full-sized cello as he climbs the stairs to a height of 4 m. It takes him 3 seconds to do this.
How does the amount of work he does change if he were to climb the same flight of stairs again in the same amount of time, but this time without the cello?
A) It depends on the weight of the cello.
B) It remains the same.
C) It increases
D) It decreases.
Answers
Mark's work decreases when he climbs the same flight of stairs again in the same amount of time without the cello.
The correct answer is option D.
The amount of work Mark does depends on the weight of the cello, as well as the distance he climbs and the time it takes. Work is calculated using the formula :
Work = Force × Distance.
In the given scenario, Mark is carrying a full-sized cello while climbing the stairs. The weight of the cello adds to the force he exerts. So, the total force Mark exerts is the weight of the cello plus his own weight (375 N).
When Mark climbs the stairs with the cello, he is doing work against the force of gravity.
The work done is equal to the force exerted multiplied by the distance climbed (375 N + weight of cello) × 4 m.
Now, if Mark were to climb the same flight of stairs again in the same amount of time (3 seconds), but this time without the cello, the amount of work he does would decrease. This is because without the cello, the force exerted would only be Mark's weight (375 N), which is less than the total force exerted with the cello.
Therefore, mark's work decreases.
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1. A ball is at rest on the top of a hill (see the figure).
At the top of the hill, the ball will have [the maximum value of its, no, the minimum value of its] gravitational potential energy and [no, the maximum value of its] kinetic energy. If the ball rolls down the hill then, its [gravitational potential energy, kinetic energy] is converted to [gravitational potential energy, kinetic energy] when it gets to the ground.
2. Get your stopwatch ready and prepare to drop the object from the height h you selected in the previous step. You should drop the object so its [bottom, top, middle] part is initially at the height h. The initial speed of the ball [zero, 9.8 m/s, 9.8 m/s^2, depends on the height h] You'll need to measure the time from when the ball leaves your hand to exactly when it hits the ground [ for the first time it bounces, after it bounces and then comes to rest, both the first time and then after it bounces; then average the two times]
.
Answers
2. When dropping the object, you should drop it so its top part is initially at the height h. The initial speed of the ball will be zero since it starts from rest. To measure the time it takes for the ball to hit the ground, you should start the stopwatch when the ball leaves your hand and stop it when the ball hits the ground for the first time. It is recommended to perform multiple trials and calculate the average time to minimize errors.
A 27-g steel-jacketed bullet is fired with a velocity of 640 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s. Knowing that the bullet leaves a 50-mm scratch on the surface of the plate and assuming that it has an average speed of 600 m/s while in contact with the plate, determine the magnitude and direction of the impulsive force exerted by the plate on the bullet.
Answers
Answer:
F = - 3.56*10⁵ N
Explanation:
To attempt this question, we use the formula for the relationship between momentum and the amount of movement.
I = F t = Δp
Next, we try to find the time that the average speed in the contact is constant (v = 600m / s), so we say
v = d / t
t = d / v
Given that
m = 26 g = 26 10⁻³ kg
d = 50 mm = 50 10⁻³ m
t = d/v
t = 50 10⁻³ / 600
t = 8.33 10⁻⁵ s
F t = m v - m v₀
This is so, because the bullet bounces the speed sign after the crash is negative
F = m (v-vo) / t
F = 26*10⁻³ (-500 - 640) / 8.33*10⁻⁵
F = - 3.56*10⁵ N
The negative sign is as a result of the force exerted against the bullet
Help asap!!!
Due right now!! fast!!!
Answers
Answer:
Not sure but I think its (A)
Explanation:
I think its (A)
Answer:
C
Explanation:
They divided some numbers and got 5
It said something about it accelerates at 10 seconds so all I did was multiply by 2 and I got C
1. What is the chemical name of the following chemical symbols?
Be
Nel
Mg
Na
Answers
Answer:
Na sodium
Mg magnesium
Be beryllium
Explanation:
Nel is not any element it is wrong
A force directed 51.8° below the positive x-axis has an x component of 4.93 lb. Find its y component.
Answers
y= 6.26 lb.
Explanation:1. Draw the vector of the force to better visualize and understand the problem.Check attached image 1.
2. Find an expression for the force in the y axis.Using the trigonometric functions, we need to find a function that relates the angle, opposite side and adjacent side of the drawn triangle. The function that does this is the tangent.
Let theta (θ) be the angle given by the problem.
Let "y" be the missing y component.
Tangent (θ) = Opposite side (y) / Adjacent side (x)
\(Tan(tetha)=\frac{y}{x}\)
3. Solve the equation for y by multiplying both sides by x.\(Tan(tetha)*x=y\)
4. Substitute the information given by the problem and calculate y.\(Tan(51.8)*(4.93)=y\\ \\y=6.26\)
5. Express the result.
y= 6.26 lb.
when a rod of ductile material like a metal is pulled in tension vertically, the pieces after fracturing will look like
Answers
Answer:
when a rod of ductile material like metal is pulled in tension vertically, the pieces after fracturing will look like two curved pieces.
Explanation:
The fracture surface will be rough, and the length of the pieces will depend on the length of the rod that was pulled.