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sdas [7]
3 years ago
15

A speeder is pulling directly away and increasing his distance from a police car that is moving at 24 m/s with respect to the gr

ound. The radar gun in the police car emits an electromagnetic wave with a frequency of6.7 × 10 9 Hz. The wave reflects from the speeder’s car and returns to the police car, where its frequency is measured to be 370 Hz less than the emitted frequency. Find the speeder’s speed with respect to the ground.
Physics
1 answer:
iogann1982 [59]3 years ago
8 0
2,062,305 2,062,305 <span>2,062,305</span>
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Identify the formula for the binary ionic compound, aluminum oxide.​
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Explanation:

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Witch of the following is the correct definition of convention
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2 years ago
An 100 kg object traveling at 50 m/s collides (perfectly inelastic) with a 50 kg object initially at rest.
qaws [65]

Answer:

Option C. 5,000 kg m/s

Explanation:

<u>Linear Momentum on a System of Particles </u>

Is defined as the sum of the momenta of each particles in a determined moment. The individual momentum is the product of the mass of the particle by its speed

P=mv

The question refers to an 100 kg object traveling at 50 m/s who collides with another object of 50 kg object initially at rest. We compute the moments of each object

m_1=(100\ kg)(50\ m/s)=5,000\ kg\ m/s

m_2=(50\ kg)(0\ m/s) = 0

The sum of the momenta of both objects prior to the collision is

P=5,000\ kg\ m/s+0\ kg\ m/s

\boxed{ P=5,000\ kg\ m/s}

7 0
3 years ago
A uniform horizontal beam 4.0 m long and weighing 200 N is attached to the wall by a pin connection that allows the beam to rota
wariber [46]

Answer:

The magnitude of the tension in the cable, T is 1,064.315 N

Explanation:

Here we have

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Center of mass of uniform beam = mid-span = 2.0 m

Point of attachment of cable = Beam end = 4.0 m

Angle of cable = 53° with the horizontal

Tension in cable = T

Point at which person stands = 1.50 m from wall

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Therefore,

Taking moment about the wall, we have

∑Clockwise moments = ∑Anticlockwise moments

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4 0
3 years ago
What wavelength of light (in nm) is associated with a frequency of 8.01E15 Hz?
AlekseyPX

Answer: 37.5 nm

Explanation: speed of light c= 3.00·10^8 m/s.

I use same accuracy to speed of light as it's for frequency.

Frequency f= 8.01·10^15 1/s

Speed c = wavelength · frequency

Wavelength = c/f = 3.745·10^-8 m

6 0
2 years ago
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