Answer:
magnitude of the pressure on the sail in the vicinity of Earth’s Orbit=
Explanation:
The momentum of a photon is:
p = E/c
E = the photon energy
c = the speed of light.
take the time derivative (gives the force)
F = dp/dt = (dE/dt)/c
F = 2(dE/dt)/c (is doubled for complete reflection of the light)
Intensity has the units of energy per unit time per unit area
= I
then,
Force/unit area = 2I/c
magnitude of the pressure on the sail in the vicinity of Earth’s Orbit=
Answer:
(a) The ball lands <u>1 m</u> ahead of the desk's base.
(b) The height of the desk is <u>1.225 m.</u>
Explanation:
Given:
Initial velocity of the ball is,
Time of flight of the ball is,
(a)
Let the ball fall at a distance of from the base of the desk and let the height of the desk be
.
The given motion of the ball is a projectile motion that can be divided into 2 mutually perpendicular directions.
Now, considering only the horizontal motion of the ball. The ball not under the influence of any force in the horizontal direction.
Therefore, the distance covered by the ball horizontally is given as:
So, the ball lands 1 m ahead of the desk's base.
(b)
Now, consider only the vertical motion of the ball. The ball is under the influence of gravity.
So, vertical distance can be obtained using Newton's equations of motion.
We use the following equation of motion:
Where,
Here, as the ball leaves the desk horizontally, initial velocity is only in the horizontal direction and doesn't have any component in the vertical direction. So,
Plug in . Solve for
.
Therefore, the height of the desk is 1.225 m.
Explanation:
Formula for steady flow energy equation for the flow of fluid is as follows.
Now, we will substitute 0 for both and
, 0 for w, 334.9 kJ/kg for
, 2726.5 kJ/kg for
, 5 m/s for
and 220 m/s for
.
Putting the given values into the above formula as follows.
q = 6597.711 kJ
Thus, we can conclude that heat transferred through the coil per unit mass of water is 6597.711 kJ.