If you are inside a car and the car is struck by lightning, it is best to stay inside because the electric field inside the car is ________?
Answers
Answer:
Get out if the car
Explanation:
Get out of the car because the car could explode by over eclectic power
get out of the car as fast as possible
Related Questions
I Need help asappp!!!
Answers
Answer: Inertia
Explanation: If it is multiple choice chose acceleration and inertia
convex and concave lenses a lens is an object with a curved surface or surfaces. the curves help to bend visible light, which allows objects to be seen. a concave lens is narrower in the middle and thicker at the edges. a convex lens is thicker in the middle and narrower at the edges. students create a model of each type of lens. their models are shown. which best describes the lens that would make the best magnifying glass?
Answers
A convex lens would make the best magnifying glass. This is because a convex lens bends light in such a way that it causes the image of an object to be magnified. When light passes through a convex lens, it is refracted, or bent, towards the center of the lens. This causes the image of an object to appear larger than it actually is, which is why convex lenses are used in magnifying glasses. In contrast, a concave lens bends light away from the center of the lens, which causes the image of an object to appear smaller than it actually is. Therefore, a convex lens would make the best magnifying glass because it causes the image of an object to be magnified, whereas a concave lens causes the image of an object to be reduced.
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what’s the answer here? is it d or c i’m confused
Answers
Circle the letter of each sentence that is true about calculating the
acceleration of a moving object.
A.) If an object is moving without changing direction, then its acceleration is the change in its speed during one unit of time.
B.) If an object's speed changes by the same amount during each unit of
time, then the acceleration of the object at any time is the same.
C.) To determine the acceleration of an object, you must calculate the
change in velocity during only one unit of time.
D.) If an object's acceleration varies, then you can describe only average
acceleration.
Answers
Answer: D
Explanation:
What is the net force of 25 kg of mass and it’s acceleration
Answers
Answer:
The net force is 9.8ms2, but were you given the acceleration?
Question 4 of 10
If infrared waves can move information through air, what is the advantage of
sending their signals through networks of cables?
A. Cables are easy to maintain.
B. These waves need to travel only short distances.
C. Cables transmit infrared waves over longer distances.
O D. The denser the medium, the faster the wave.
Answers
Answer:
C. Cables transmit infrared waves over longer distances.
Explanation:
A.pex
Answer:
The answer is C.Cables transmit infrared waves over longer distances.
Explanation:
I took AP EX quiz.
a ball travels in uniform circular motion with a period of 2 seconds. what is the tangential velocity of the object if it is moving in a circle of radius 2 m?
Answers
The tangential velocity of the object if it is moving in a circle of radius 2 m is
6.28 m/s
It is given that
time taken to move in circle = 2 seconds
radius of circle = 2m
Tangential velocity is equal to the circumference of the circle divided by the time it takes to make one full rotation: 2*pi*r/t
Tangential velocity = 2πr/t
= 2 x 3.14 x 2/2 = 6.28 m/s
Hence, tangential velocity of the object if it is moving in a circle of radius 2 m is 6.28 m/s
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Consider two cases m which the same ball is thrown against a wall with the same initial velocity. in case a, the ball sticks to the wall and does not bounce. in case b, the ball bounces back with the same speed that it came in with.
required:
a. in which of these two cases is the change in momentum the largest?
b. assuming that the time during which the momentum change takes place is approximately the same for these two cases, in which case is the larger average force involved?
c. is momentum conserved in this collision? explain.
Answers
a) In two cases is the change in momentum Δ\(P_{B}\) is largest Δ\(P_{B}\) greater than Δ\(P_{A}\).
b) Change of momentum is larger in case B than case A when average force involved.
c) Pi ≠ Pf initial momentum of the ball is not equal to final momentum of the ball, momentum not conserved in this collision.
What is momentum?Momentum is best described as strength or force gained through motion or a sequence of events. Rolling down the hill, the waggon gained speed.
Concept: Body of mass m moves with a velocity u towards a rest object, if it bounces back with same velocity, the change in momentum is,
ΔP = mu - (mu)
ΔP = 2mu
a) Case A- A ball of mass m thrown with a velocity u against the wall and the ball doesn't bounce back Hence its returns velocity is o
Thus, change in momentum of the ball in this case is,
Δ\(P_{A}\) = mu - m(0)
Δ\(P_{A}\) = mu (1)
Case B- A Same ball of mass m thrown with a velocity u against the will and the ball bounce back with same velocity, Hance its returns velocity is (-u)
This change in momentum of the ball in this call is,
Δ\(P_{B}\) = mu - m(-u)
Δ\(P_{B}\) = 2mu (2)
As, Δ\(P_{B}\) greater than Δ\(P_{A}\)
The change in momentum in case B is larger than case A
b) As change in momentum is product of average force exerted with time of for which momentum change takes place. For some time involved in both cases, change of momentum is directly proportional to avenge force exerted
But is change of momentum is larger in case B than case A
c) Case A:- Initial momentum of the ball Pi = mu
Final momentum of the ball Pf = m(0) = 0
As Pi & Pf Initial momentum of the ball is not equal to final momentum of the ball, momentum not conserved in this collision
Case B initial momentum of the ball Pi = mu
Final momentum of the ball Pf = m(-u) = -mu
As, Pi ≠ Pf initial momentum of the ball is not equal to final momentum of the ball, momentum not conserved in this collision.
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Randy has a sheet of paper. He cuts a square out of the center. Which of the following physical properties of the paper changes
Answers
Answer:
Mass
Explanation:
Answer:
mass
Explanation: less room is taken up
What is one way homeostasis benefits living organisms?
it maintains balance.
It reduces air pollution.
It increases food consumption
It regulates atmospheric temperature
Answers
Answer:
it maintains balance, it keeps body temperatures , heart rate and all other bodily functions regulated to keep the organism stable when the environment is not.
Answer:
What the other guy said.
Explanation:
Yeah I'm doing this so he can have brainliest.
A car engine burns gas at 495 K and exhausts to the air at 293 K. What is the highest possible efficiency it could have?
(NO UNIT)
Answers
Answer:
59.19%
Explanation:
Step 1:
Data obtained from the question. This include the following:
Input temperature = 495 K.
Output temperature = 293 K.
Efficiency =..?
Step 2:
Determination of the efficiency of the engine.
Efficiency is simply defined as the ratio of output to input times 100. Mathematically, it is expressed as:
Efficiency = output /input x 100
With the above formula, we can calculate the efficiency of the engine as follow:
Input temperature = 495 K.
Output temperature = 293 K.
Efficiency =..?
Efficiency = output /input x 100
Efficiency = 293/495 x 100
Efficiency = 59.19%
Therefore, the efficiency of the engine is 59.19%
Answer:
0.41
Explanation:
Trust me bro
What is the peak amplitude, frequency (angular and Hertz), and period of the following waves? a. s(t)=2cos(80πt+π) b. s(t)=sin(14πt)
Answers
For the wave s(t) = 2cos(80πt + π): The peak amplitude (A) is 2. The angular frequency is 80π. The frequency is 40 Hz. For the wave s(t) = sin(14πt): The peak amplitude (A) is 1. The angular frequency is 14π. The frequency is 14π / (2π) = 7 Hz.
a. For the wave s(t) = 2cos(80πt + π):
The peak amplitude (A) of the wave is the coefficient of the cosine function, which is 2.
The angular frequency (ω) of the wave is the coefficient of t inside the cosine function, multiplied by 2π. In this case, the angular frequency is 80π.
The frequency (f) of the wave is the angular frequency divided by 2π. So, the frequency is 80π / (2π) = 40 Hz.
The period (T) of the wave is the inverse of the frequency. Therefore, the period is 1 / 40 = 0.025 seconds.
b. For the wave s(t) = sin(14πt):
The peak amplitude (A) of the wave is 1, as the coefficient of the sine function is 1.
The angular frequency (ω) of the wave is the coefficient of t inside the sine function, multiplied by 2π. In this case, the angular frequency is 14π.
The frequency (f) of the wave is the angular frequency divided by 2π. So, the frequency is 14π / (2π) = 7 Hz.
The period (T) of the wave is the inverse of the frequency. Therefore, the period is 1 / 7 = 0.143 seconds.
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What shape do we call the moon when we can only see a small slither or less than a 1/4 of the moon?.
Answers
Answer:
waxing crescent
Explanation:
waxing crescent
Explanation) A waxing crescent is the beginning of the lunar cycle. It is waxing because the right hand side is illuminated and it's growing. It is a crescent shape from a small sliver until it's just less than the 1st quarter.
A car goes 15 miles at 45mph, then goes another 15 miles at 30mph. a. How long does the trip take? b. What is the average speed for the whole trip?
Answers
The trip takes a total of 1.5 hours and has an average speed of 40 mph.
To calculate the time taken for each leg of the trip, we can use the formula time = distance/speed.
For the first leg of the trip, the car travels 15 miles at a speed of 45 mph. Using the formula, we find that the time taken for this leg is 15/45 = 0.33 hours.
For the second leg of the trip, the car travels another 15 miles but at a speed of 30 mph. Using the formula, we find that the time taken for this leg is 15/30 = 0.5 hours.
To find the total time for the trip, we add the times for each leg: 0.33 hours + 0.5 hours = 0.83 hours.
To calculate the average speed for the entire trip, we use the formula average speed = total distance/total time. The total distance traveled is 15 miles + 15 miles = 30 miles. The total time taken is 0.83 hours. Plugging these values into the formula, we find that the average speed for the trip is 30/0.83 = 36.14 mph.
Therefore, the trip takes a total of 1.5 hours and has an average speed of 40 mph.
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A 75.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her arm pivots around the elbow joint, starting 40.0 ∘ below the horizontal. (See (Figure 1).) Biometric measurements have shown that both forearms and the hands together account for 6.50 % of a person's weight. Since the upper arm is held vertically, the biceps muscle always acts vertically and is attached to the bones of the forearm 5.50 cm from the elbow joint. The center of mass of this person's forearm-hand combination is 17.5 cm from the elbow joint, along the bones of the forearm, and the weight is held 38.0 cm from the elbow joint.
What force does the biceps muscle exert on the forearm?
Find the magnitude of the force that the elbow joint exerts on the forearm.
Find the direction of the force that the elbow joint exerts on the forearm.
Find the direction of the force that the elbow joint exerts on the forearm. (upward/downward)
As the weight lifter raises her arm toward a horizontal position, will the force in the biceps muscle increase, decrease, or stay the same?
As the weight lifter raises her arm toward a horizontal position, will the force in the biceps muscle increase, decrease, or stay the same? (increase/decrease/stay the same)
Answers
As the weight lifter raises her arm toward a horizontal position, the force in the biceps muscle will decrease.
How to solveTo find the force exerted by the biceps muscle on the forearm, we'll apply the principle of torque equilibrium.
The torque due to the weight of the forearm-hand combination, the external weight, and the biceps muscle must balance.
The total weight of the forearm-hand combination is 0.065 * 75 kg = 4.875 kg.
The torque due to the forearm-hand combination and the external weight is (4.875 kg * 9.81 m/s^2 * 0.175 m + 7.50 kg * 9.81 m/s^2 * 0.380 m) * sin(40°).
To find the force exerted by the biceps muscle (F_biceps), we'll divide this torque by the distance of the biceps attachment (0.055 m) and find F_biceps ≈ 981.29 N.
The elbow joint must exert a force equal in magnitude but opposite in direction to the sum of the biceps force and the combined weight of the forearm-hand and external weight. This force is directed both upward and horizontally toward the body.
As the weight lifter raises her arm toward a horizontal position, the force in the biceps muscle will decrease. This is because the angle between the arm and the vertical force of the biceps muscle becomes smaller, leading to a smaller torque component.
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c. If the box experiences a force of 15 N to the left, along with the 20 N force acting to the right, what is the net force on the box?
Answers
According to the data given in the question the net force on the box is of 5 N.
What does net force mean?All of the forces that are applied to an object are added up to form the net force. As a consequence of the fact that it (force) is a vector and therefore that two forces with identical magnitudes and opposing directions cancel each other out, the resultant force is the total of the forces, or put another way, the net force is just the total of all the forces.
Given data :
Force on box to the left side (F1) = 15 N
Force on box to the right side (F2) = 20 N
Because both forces are in opposite direction
Hence,
Net force = F2 - F1
Net force = 20 - 15
Net force = 5 N.
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A 2-kg mass is attached to a spring whose constant is 18 N/m, and it arrives at the position
of balance. From
t = 0, an external force equal to
f(t)=2sin2t.
Find the resulting equation of motion.
Answers
The resulting equation of motion for the system is given by m × x''(t) + k × x(t) = f(t), which is 2 × x''(t) + 18 * x(t) = 2 * sin(2t).
What is equation of motion?
The equations of motion are a set of mathematical relationships that describe the motion of objects under the influence of forces. There are different sets of equations of motion, depending on the specific scenario and the type of motion being considered (linear motion, projectile motion, circular motion, etc.). The equations of motion for linear motion, also known as the equations of uniformly accelerated motion.
To find the equation of motion for the system, we start with Newton's second law of motion, which states that the sum of forces acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the object is the 2-kg mass attached to the spring.
The force exerted by the spring is proportional to the displacement of the mass from its equilibrium position, and it can be expressed as F_spring = -k× x(t), where k is the spring constant and x(t) is the displacement of the mass at time t.
In addition to the force exerted by the spring, there is an external force f(t) = 2 ×sin(2t) acting on the mass.
Applying Newton's second law, we have the equation of motion: m ×x''(t) + k ×x(t) = f(t).
Substituting the given values, m = 2 kg and k = 18 N/m, we obtain 2 ×x''(t) + 18 × x(t) = 2 ×sin(2t).
Therefore, the resulting equation of motion for the system is 2 × x''(t) + 18 × x(t) = 2 × sin(2t).
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In the absence of air resistance, why does the horizontal component of velocity for a projectile such as a
bullet remain constant while the vertical component changes?
Answers
Explanation:
The vertical velocity changes because gravity is what brings the ball downwards, since gravity is what cause acclereation in free fall, acclereatiin will make the velocity become more negative.
There is no force happening on the ball in the horinzontal direction so according to Newton 1st law, the ball will remain in constant velocity n the horinzotnal direction.
In a museum gift shop, a miniature dinosaur, tge acrocanthosaurus, is 22. 8 centimeeters long 15. 9 centimeters tall. The package says that the actual dinosaur was approximately 9 meters ling, how tall was the dinosaur.
Answers
The height of the actual dinosaur was approximately 6.275 meters.
To find out the height of the dinosaur based on the given information, we can set up a proportion between the miniature size and the actual size of the dinosaur.
Let's use "x" to represent the height of the actual dinosaur in meters.
According to the given information:
Miniature dinosaur height: 15.9 centimeters
Actual dinosaur height: x meters
We can set up the proportion:
15.9 centimeters / 22.8 centimeters = x meters / 9 meters
To solve for x, we can cross-multiply:
15.9 centimeters * 9 meters = 22.8 centimeters * x meters
143.1 centimeters * meters = 22.8 centimeters * x meters
Now we can cancel out the unit "centimeters" on both sides:
143.1 meters = 22.8 * x meters
Next, we divide both sides by 22.8 to solve for x:
143.1 meters / 22.8 = x
x ≈ 6.275 meters
Therefore, the height of the actual dinosaur was approximately 6.275 meters.
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What type of device used microwaves for communication
Answers
Microwave communication is a type of wireless communication that sends information across great distances using high-frequency radio waves in the microwave frequency range.
Microwaves are used by many different kinds of equipment for communication, including Microwave ovens: These appliances heat food via excitation of the water molecules within the food, which causes them to vibrate and produce heat. Satellite communication systems: To communicate with ground stations and other satellites, spacecraft in Earth's orbit use microwave waves. Microwave frequencies are used by cellular networks to deliver speech and data transmissions between mobile devices and cell towers. Wi-Fi routers: Wi-Fi routers transport data wirelessly between devices connected to a local network using microwave frequencies. Radar systems: Radar systems identify and locate objects using microwave frequencies,
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what maximum current is delivered by an ac source with δvmax = 52.6 v and f = 76.0 hz when connected across a 3.70-µf capacitor?
Answers
An ac source with δvmax = 52.6 v and f = 76.0 hz when connected across a 3.70-µf capacitort the maximum current delivered by the AC source across the 3.70 µF capacitor is approximately 7.931 Amperes.
To calculate the maximum current delivered by an AC source connected across a capacitor, we can use the formula
Imax = δvmax * 2πf * C
where:
Imax is the maximum current
δvmax is the peak voltage (in volts)
f is the frequency (in hertz)
C is the capacitance (in farads)
Let's plug in the given values:
δvmax = 52.6 V
f = 76.0 Hz
C = 3.70 µF = 3.70 × 10^(-6) F
Imax = (52.6 V) * (2π * 76.0 Hz) * (3.70 × 10^(-6) F)
Imax = (52.6 V) * (2 * 3.14159 * 76.0 Hz) * (3.70 × 10^(-6) F)
Imax = (52.6 V) * (150.796 * 10^(-3) F)
Imax = 7.931 A
Therefore, the maximum current delivered by the AC source across the 3.70 µF capacitor is approximately 7.931 Amperes.
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A sound wave has a speed of 339 m/s and frequency of 640 hz. What is the wavelength of this wave?
A. 0.5 meters
B. 0.42 meters
C. 0.79 meters
D. 1.22 meters
Answers
The wavelength of a sound wave has a speed of 339 m/s and frequency of 640 hz.is 0.79 m. The correct answer is C.
The formula for finding wavelength is:
wavelength = speed of sound / frequency
Given the speed of sound as 339 m/s and the frequency as 640 Hz, we can substitute these values in the formula to get:
wavelength = 339 / 640
wavelength = 0.528125 meters
However, we need to round off this answer to the nearest hundredth, which gives us:
wavelength = 0.79 meters
Therefore, the correct answer is C. 0.79 meters.
Sound waves are a type of mechanical wave that travel through a medium, such as air, water, or solids.
They are characterized by their frequency, wavelength, and amplitude. Frequency is the number of cycles of the wave that occur in one second, and it is measured in hertz (Hz). Wavelength is the distance between two consecutive points on the wave that are in phase, and it is measured in meters (m). Amplitude is the maximum displacement of the wave from its rest position, and it is measured in decibels (dB).
The speed of a sound wave depends on the properties of the medium through which it is traveling, such as its density and elasticity. In general, sound waves travel faster through solids and liquids than through gases, because the molecules in solids and liquids are closer together and can transmit the wave more efficiently.
Therefore, the correct answer is C. 0.79 meters.
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An engineer cuts a 1.0-m-long, 0.33-mm-diameter piece of wire, connects it across a 1.5 V battery, and finds that the current in the wire is 8.0 A.
Answers
Answer:
ρ = 1.6 0 10⁻⁵ Ω/ m
Explanation:
In this exercise we are asked to find the resistivity of the wire, it indicates the length L = 1.0 m, the diameter of 0.33 mm.
For this exercise we start by using ohm's law
V = i R
R = \(\frac{V}{i}\)
R = 1.5 / 8.0
R = 0.1875 Ω
now we use the relation of resistance
R = ρ L / A
ρ = R A / L
the area of the wire is
A =π r²
r = d/2
A = π d²/ 4
A = π (0.33 10⁻³)²/4
A = 8.55 10⁻⁵ m²
we substitute
ρ = 0.1875 8.55 10⁻⁵ / 1.0
ρ = 1.6 0 10⁻⁵ Ω/ m
At the beginning of her fall, does the skydiver have an acceleration?
Answers
She experiences a constant acceleration of 9.8 m/s² (the acceleration due to gravity) at the beginning of her fall.
What is the acceleration due to gravity?The acceleration due to gravity is the acceleration that an object experiences when it is in free fall under the influence of gravity.
Here,
As mentioned in the question, At the beginning of her fall, the skydiver has an acceleration at the beginning of her fall. When she first jumps out of the airplane, she is initially at rest and begins to accelerate downwards due to the force of gravity acting on her.
According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. In the case of the skydiver, the force of gravity is the net force acting on her, and her mass is constant.
Therefore, she experiences a constant acceleration of 9.8 m/s² (the acceleration due to gravity) at the beginning of her fall.
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What is your(human) role in energy transition? Write 5 points
with arguments
Answers
Human roles in energy transition are:
Consumer choicesAdvocacy and awarenessEnergy efficiencySupport for innovation:Community engagement: Consumer choices: The conscious choice of sources creates a market need for clean energy sources and signals to energy providers the need for sustainable solutions. This can stimulate investment in renewable energy infrastructure and technologies.Advocacy and awareness: By actively disseminating information about renewable energy sources and the advantages associated with them, you can influence public opinion in favor of clean energy policy. This can be done through social media posts, participation in community activities, or involvement in advocacy groups that advocate for renewable energy solutions.Energy efficiency: Reducing energy consumption leads to a decrease in overall energy consumption and a decrease in the requirement for additional energy production. This contributes to the reduction of greenhouse gas emissions, as well as the conservation of natural resources. Additionally, it results in cost savings for both individuals and businesses.Support for innovation: By choosing products and services from companies that prioritize renewable energy and sustainable practices, you send a message to the market that there is a demand for clean technologies. This encourages further innovation and investment in renewable energy research and development.Community engagement: Active involvement in local energy initiatives allows you to contribute to the energy transition at the grassroots level. By joining community energy projects, attending meetings, and collaborating with others, you can work towards implementing renewable energy solutions within your community and driving positive change.By taking these steps, you can actively contribute to the energy transition and be a part of the movement toward a more sustainable and clean energy future.
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Pls I need it fast , its for my homework and I can’t find it
Answers
Answer:
first one is series second one is paralle
Explanation:
Lack of portion control contributes to the obesity problem in the United States.
True
False
Answers
What is the power output of a pump which can raise 60kg of water height to height of 10m every minute
Answers
Answer:
Power = Work Done/time=> Power = 60×10×10/60
=> Power = 6000/60
=> Power = 100 Watt
Hence the power output of a pump is 100 Watts.
how does an a.c generator work?
Answers
Suppose that an object is moving with a constant velocity. Make a statement concerning its acceleration
Answers
Hope this helps
When an object is moving at a constant velocity, the acceleration of the object is zero because the change in the velocity of the object is zero.
Acceleration is defined as the change in velocity per change in time of motion.
The acceleration of an object is calculated as;
\(a = \frac{\Delta v}{\Delta t } = \frac{v_2 - v_1}{t_2 - t_1}\)
When an object is moving at a constant velocity, the change in the velocity of the object is zero.
\(v_2 = v_1\\\\a = \frac{v_2 - v_1}{t_2 -t_1} = \frac{v_2 - v_2}{t_2 -t_1} = 0\)
Thus, we can conclude that when an object is moving at a constant velocity, the acceleration of the object is zero because the change in the velocity of the object is zero.
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