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2 years ago

Describe one way in which light acts like a wave and one way in which light acts like a particle.

Physics

1 answer:

monitta2 years ago

3 0

Answer:

Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. ... When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this "photoelectric" effect by proposing that light – thought to only be a wave – is also a stream of particles.

Explanation:

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"Without forces there can be no movement"- Do you agree with this statement? Why or Why not?

myrzilka [38]

Answer: Yes.

Explanation: It is clearly stated in Newton’s first law of physics that an object will not change its motion unless a force acts on.

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3 years ago

What is the mass of mars

tiny-mole [99]

the mass of mars is

6.39 × 10^23 kg

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1 year ago

A student pushes on a crate with a force of 100 Newtons directed to the right.

romanna [79]

Answer:

100N

Explanation:

Newton's third law of motion

For every action, there is an equal and opposite reaction.

Therefore 100N of force is exerted by the crate on student as a reaction to his action

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3 years ago

Glands in the body send out chemical messages through hormones to control growth, development, and metabolism. The system that h

BartSMP [9]

Answer:

The nervous and endocrine systems exert the ultimate control over homeostasis because they coordinate the functions of the body's systems.

Explanation:

4 0

2 years ago

I need some help w/ this:

pochemuha

Answer:

The velocity of the police car is, v = 17.798 m/s

Explanation:

Given data,

The actual frequency of the siren, f = 2010 Hz

The observed frequency of siren is, f' = 2120 Hz

The velocity of the observer, v' = 0 m/s

The velocity of the source, v = ?

The formula for Doppler effect,

$f'=\frac{(V+v')}{(V-v)}f$

Where,

V - velocity of sound waves in air.

$v=V-(V+v')\frac{f}{f'}$

Substituting the given values,

$v=343-(343+0)\frac{2010}{2120}$

v = 17.798 m/s

Hence, the velocity of the police car is, v = 17.798 m/s

5 0

2 years ago