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kvasek [131]
2 years ago
6

A car moving at a speed of 20 m/s has a kinetic energy of 200,000 J from that motion. What is the car's mass?

Physics
1 answer:
zhenek [66]2 years ago
8 0

Answer:

i think the answer is 1000 kg but i might be wrong

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The magnetic field in the region between the poles of an electromagnet is uniform at any time, (1 point) but is increasing at th
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Answer:

B)

The magnitude of induced emf in the conducting loop is 0.99 mV.

Explanation:

Rate of increase in magnetic field per unit time = 0.090 T/s

Area of the conducting loop = 110 cm^2 = 0.0110 m^2

Electromagnetic induction is the production of an emf or voltage in a coil of wire due to a changing magnetic field through the coil.

Induced e.m.f is given as:

EMF = (-N*change in magnetic field/time)*Area

EMF = rate of change of magnetic field per unit time * Area

EMF = 0.090 * 0.0110

EMF = 0.00099 V

EMF = 0.99 mV

5 0
3 years ago
the force between your feet and the floor is greater while standing on your tiptoes than while standing flat on your feet
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is that what your question was?
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3 years ago
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Cm^3 is same as mL

13.5 g / 5 mL = 2.7 g/mL
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3 years ago
How can humans activities affect the frequency and impact of natural disasters
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8 0
3 years ago
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A wave has a speed of 30 m/s, a frequency of 6 Hz, and a wavelength of 5 m. If the wavelength remains constant, and the frequenc
mixer [17]

Answer: 60m/s

Explanation:

The wavespeed is the distance covered by the wave in one second. It is measured in metre per second, and represented by the symbol V

Wavespeed (V) = Frequency F x wavelength λ

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In the first case:

Wavespeed = 30 m/s

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In the second case:

Wavespeed = ?

Frequency of sound = (2x 6Hz = 12Hz)

Wavelength = 5m (remains constant)

Apply V = F λ

Wavespeed = 12 Hz x 5m

Wavespeed = 60m/s

Therefore, when frequency is doubled, the speed is also doubled. Thus, the new speed of the wave is 60m/s

8 0
3 years ago
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