1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ICE Princess25 [194]
3 years ago
7

Light with an intensity of 1 kW/m2 falls normally on a surface with an area of 1 cm2 and is completely absorbed. The force of th

e radiation on the surface is
Physics
1 answer:
kogti [31]3 years ago
4 0

Answer:

The force of the radiation on the surface is 3.33 x 10⁻¹⁰ N

Explanation:

Given;

intensity of light, I = 1kw/m² = 1000 W/m²

area of the surface, A = 1 cm² = 1 x 10⁻⁴ m²

Since the light is completely absorbed, the force of the radiation is given by;

F = P/c

where;

c is the speed of light = 3 x 10⁸ m/s

But P = IA

F = IA /c

F = (1000 X 1 X 10⁻⁴) / 3 x 10⁸

F = 3.33 x 10⁻¹⁰ N

Therefore, the force of the radiation on the surface is 3.33 x 10⁻¹⁰ N

You might be interested in
If an object looks blue, it reflects ____ waves.
soldi70 [24.7K]
It reflects blue light waves.
7 0
3 years ago
A puck moves 2.35 m/s in a -22 degree direction. A hockey stick pushes it for 0.215 s, changing its velocity to 6.42 m/s in a 50
Whitepunk [10]

Answer:

Displacement in Y direction is 0.434 m

Explanation:

initial velocity of the puck is 2.35 m/s at -22 degree

so here it is given as

v_i = 2.35 cos22 \hat i - 2.35 sin22 \hat j

v_i = 2.18 \hat i - 0.88 \hat j

final velocity is given as 6.42 m/s at 50 degree

so we have

v_f = 6.42 cos50 \hat i + 6.42 sin50\hat j

v_f = 4.13 \hat i + 4.92\hat j

now displacement in Y direction is given as

\Delta y = \frac{v_f + v_i}{2}t

\Delta y = \frac{-0.88 + 4.92}{2} (0.215)

\Delta y = 0.434 m

5 0
3 years ago
BRAINLIESTTTT!!!!! THIS IS DUE IN 5 MINUTES!<br>​
Gnesinka [82]

Equation: -10 40/4^2

Explanation: I multiplied the -10, but idk if that' what you do cause I've never done this. So if you do do that it's -1000, but that is probably wrong. Sorry, I tried.

8 0
3 years ago
One kilogram-meter per second squared is also equal to what unit
yan [13]
Metres/second² is acceleration. maybe a bit more clarification?

8 0
3 years ago
At a fixed depth within a fluid at rest, the pressure pushing upward is
earnstyle [38]

Answer: E) A) salt water.

Explanation:

E) In equilibrium, pressure exerts equally in all directions, so for a given depth, the pressure is the same for all points located at the same depth, and it can be written as follows:

p = p₀ + ρ.g.h, where p₀ = atmospheric pressure, ρ=fluid density, h=depth from the surface.

A) The buoyant force, as discovered by Archimedes, is an upward force, that opposes to the weight of an object (as it is always downward), and is equal to the weight of the volume of the liquid that the object removes, which means that is proportional to the density of the liquid.

As salt water is denser than fresh water, the buoyant force exerted by the salt water is always greater than the one produced by the fresh water, so objects will float more easily in salt water than in fresh water.

In the limit, it is possible that one object float in salt water and sink in fresh water.

3 0
3 years ago
Other questions:
  • How far from a -7.80 μC point charge must a 2.40 μC point charge be placed in order for the electric potential energy of the pai
    7·1 answer
  • A baseball goes from zero to 34 m/s in 0.188 s. What is its average acceleration? Answer in units of m/s^2
    15·1 answer
  • Which is a way that the model of the atom became stronger through new experiments? (1 point) New technology allowed scientists t
    11·2 answers
  • In a building with 10.000 cubic feet where the air changes every two hours, what the rate of air change? A. 167.7 cfm B. 83.3 cf
    15·2 answers
  • You attach a 1.70 kg block to a horizontal spring that is fixed at one end. You pull the block until the spring is stretched by
    8·1 answer
  • Will ice melt faster in salt, sugar or water?
    5·1 answer
  • A disk-shaped merry-go-round of radius 2.93 m and mass 165 kg rotates freely with an angular speed of 0.691 rev/s . A 62.4 kg pe
    5·2 answers
  • One of the predicted problems due to global warming is that ice in the polar ice caps will melt and raise sea level everywhere i
    13·1 answer
  • When a teenager plugs his stereo into the same outlet as the television and lamp, all three devices stop working. What is the mo
    8·2 answers
  • PLEASE HELP! URGENT<br><br> Explain how the forces need to change so an aeroplane can land
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!