All categories

4 years ago

Torch is a (source of light) or (reflect light)

Physics

2 answers:

Ugo [173]4 years ago

6 0

Torch is a source of light

natka813 [3]4 years ago

6 0

The answer would be : source of light.

Hope this helps !

Photon

You might be interested in

A uniform disk of mass 21 kg, thickness 0.5 m, and radius 0.6 m is located at the origin, oriented with its axis along the y axi

goldenfox [79]

Answer:

$29.69 kgm^2/s$

Explanation:

So suppose the axis of rotation is perpendicular to the surface of the disk, then the moment of inertia can be calculated as the following:

$I = mr^2/2 = 21 * 0.6^2/2 = 3.78 kgm^2$

We can convert the rotation speed in term of 0.8 seconds per revolution to the angular velocity knowing that each revolution is 2π

$\omega = 2\pi / 0.8 = 7.85 rad/s$

Then the rotational angular momentum of the disk is:

$\omega I = 7.85 * 3.78 = 29.69 kgm^2/s$

In case the axis of rotation is parallel with the surface, the moment of inertia would have a formula of:

$I = m(3r^2 + h^2)/12 = 21*(3*0.6^2 + 0.5^2)/12 = 2.3275 kg m^2$

5 0

3 years ago

PLease Help !!! A.S.A.P!!! will be marked as brainlest !!!!! 16 points

White raven [17]

This one is correct

Jamie is correct, because the mechanical energy is converting to electrical energy.

3 0

3 years ago

Read 2 more answers

Long Shore Drift is the ...

azamat

Answer: D. movement of material along a coast by waves that approach at an angle to the shore.

Explanation:

Longshore drift is also referred to as the littoral druft and it means the sediment that is moved by the longshore current.

Longshore drift is the movement of material along a coast by waves which approach at an angle to the shore but then recede down the beach.

Therefore, the correct option is D.

5 0

3 years ago

Who discovered laws of gravity and motion? He discovered aspects of light and color, leading to today's spectrum analysis

Vitek1552 [10]

Answer:

Sir Isaac Newton

Explanation:

The laws according to which bodies move and how one body attracts another body were developed by Newton. The three laws of motion and the law of universal gravitation were developed by Newton.

In the seventeenth century almost all the refracting telescopes exhibited color distortion. Newton believed that white light had a spectrum which was the reason for this distortion. The lens of a refracting telescope used to act like a prism which caused the dispersion of light proving Newton's hypothesis.

5 0

3 years ago

Mosses don't spread by dispersing seeds; they disperse tiny spores. The spores are so small that they will stay aloft and move w

AnnyKZ [126]

A) 0.3

The initial kinetic energy of the stream of spores is

$K_i = \frac{1}{2}mv^2$

where m is the mass of the spores and v = 3.6 m/s is their initial speed.

The final gravitational potential energy (at the point of maximum height) of the spores is

$U_f = mgh$

where g=9.8 m/s^2 is the acceleration due to gravity and h = 20 cm = 0.20 m is the maximum height.

Therefore, the fraction of kinetic energy converted to final potential energy is

$\frac{U_f}{K_i}=\frac{mgh}{\frac{1}{2}mv^2}=\frac{2gh}{v^2}=\frac{2(9.8 m/s^2)(0.20 m)}{(3.6 m/s)^2}=0.30$

So, about 30% of the initial kinetic energy is converted into potential energy.

B) It has been transformed into thermal energy of the spores and surrounding air

In fact, because of the presence of the air resistance during the motion of the spores, some of the mechanical energy of the spores is "wasted" and converted into thermal energy (heat) of the spores and the surrounding air. Without the air resistance, the mechanical energy would be conserved, and the final potential energy of the spore would be equal to the initial kinetic energy.

3 0

3 years ago