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inn [45]
3 years ago
14

1. A heat lamp is designed to keep food and other things warm. Would it also make a good tanning lamp? Why or why not?

Physics
2 answers:
Lostsunrise [7]3 years ago
6 0
1 isn't a tanning lamp one which produces UV ? a heat lamp does IR. so no.
2 speed of light = frequency times wavelength. 300,000,000/0.25 = frequency.
NemiM [27]3 years ago
4 0
1. becuase it is so hot that it could tan or be used to keep warm.
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When you drop a pebble into a pond, the energy from the pebble acts on the water and causes waves. What is the wave?
Art [367]

Answer:

A, The water moving away

Explanation:

When the pebble hits the water the surface tension breaks causing the water to separate away and make a ripple in the water.

3 0
2 years ago
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An astronaut is on the moon. He drops a hammer from a height of 3.2metres and it takes 2.0 seconds to reach the lunar landscape.
Anvisha [2.4K]

Answer:

1/6 m/s^2      ( about 1/6th gravity of Earth ( 9.81 m/s^2)

Explanation:

Displacement =  yo  +  vo t  - 1/2 a t^2

      -  3.2          = 0     +  0     - 1/2 a(2.0)^2

      -     3.2       =                -2a

             a = 3.2 / 2 = 1.6 m/s^2

6 0
2 years ago
032. A 25.0 kg bicycle is traveling at a speed of 10.0 m/s.
dimulka [17.4K]
Answer:
A: 4
B: 7
C. 3
Source:
Trust me bro
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7 0
2 years ago
Please help me with these two questions
Andre45 [30]

Answer:

The kinetic energy would decrease because it has less mass

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A battery

4 0
3 years ago
Suppose that you are holding a pencil balanced on its point. If you release the pencil and it begins to fall, what will be the a
Naily [24]

Answer:

The angular acceleration of the pencil<em> α  = 17 rad·s⁻²</em>

Explanation:

Using Newton's second angular law or torque to find angular acceleration, we get the following expressions:

    τ = I α                              (1)

    W r = I α                          (2)

The weight is that the pencil has is,

   sin 10 = r / (L/2)

   r = L/2(sin(10))

 

The shape of the pencil can be approximated to be a cylinder that rotates on one end and therefore its moment of inertia will be:

    I = 1/3 M L²

Thus,

   mg(L / 2)sin(10) = (1/3 m L²)(α) 

   α(f) = 3/2(g) / Lsin(10)

   α  = 3/2(9.8) / 0.150sin(10)

  <em> α  = 17 rad·s⁻²</em>

Therefore, the angular acceleration of the pencil<em> </em>is<em> 17 rad·s⁻²</em>

3 0
3 years ago
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