Sunlight above the Earth's atmosphere has an intensity of 1.38 kW/m2. If this is reflected straight...
Sunlight above the Earth's atmosphere has an intensity of 1.38 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving the mirror twice the incident momentum.
a) Calculate the force per square meter of mirror (in N/m2).
b) Very low mass mirrors can be constructed in the near weightlessness of space, and attached to a spaceship to sail it. Once done, the average mass per square meter of the spaceship is 0.146 kg. Find the acceleration (in m/s2) of the spaceship if all other forces are balanced.
c) How fast (in m/s) is it moving 24 hours later? (Assume the spaceship started from rest.)
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Sunlight above the Earth's atmosphere has an intensity of 1.38
kW/m2. If this is reflected straight...
Sunlight above the Earth's atmosphere has an intensity of 1.40 kW/m2. If this is reflected straight...
Sunlight above the Earth's atmosphere has an intensity of 1.40 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving the mirror twice the incident momentum. (a) Calculate the force per square meter of mirror (in N/m2). (b) Very low mass mirrors can be constructed in the near weightlessness of space, and attached to a spaceship to sail it. Once done, the average mass per square meter...
1) (a) If the position of an electron in a membrane is measured to an accuracy...
1) (a) If the position of an electron in a membrane is measured to an accuracy of 4.79 µm, what is the electron's minimum uncertainty in velocity (in m/s)? ___m/s (b) If the electron has this velocity, what is its kinetic energy in eV? ______ eV 2) Sunlight above the Earth's atmosphere has an intensity of 1.40 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving...
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1.38 kW/m2....
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1.38 kW/m2. (a) Assuming that Earth (and its atmosphere) behaves like a flat disk perpendicular to the Sun's rays and that all the incident energy is absorbed, calculate the force on Earth due to radiation pressure. (b) For comparison, calculate the force due to the Sun's gravitational attraction. Assume that the speed of light and Earth radius are 2.998 × 108 m/s and 6.37 thousand km...
One goal of the Russian space program is to illuminate dark northern cities with sunlight reflected...
One goal of the Russian space program is to illuminate dark northern cities with sunlight reflected to the Earth from a 200 m diameter mirrored surface in orbit. Several smaller prototypes have already been constructed and put into orbit. (a) Assume that sunlight with intensity 1340 W/m2 falls on the mirror nearly perpendicularly and that the atmosphere of the Earth allows 78.3% of the energy of sunlight to pass though it in clear weather. What is the power received by...
The intensity of electromagnetic waves from the sun is 1.4 kW/m” just above the earth's atmosphere....
The intensity of electromagnetic waves from the sun is 1.4 kW/m” just above the earth's atmosphere. Eighty percent of this reaches the surface at noon on a clear summer day. Suppose you think of your back as a 33.0 cm x 55.0 cm rectangle. Part A How many joules of solar energy fall on your back as you work on your tan for 0.500 hr ? Express your answer with the appropriate units. ? CH PÅ Value o 2 Units...
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1.38 kW/m2. (a) Assuming that Earth (and its atmosphere) behaves like a flat disk perpendicular to the Sun's rays and that all the incident energy is absorbed, calculate the force on Earth due to radiation pressure. (b) For comparison, calculate the force due to the Sun's gravitational attraction. Assume that the speed of light and Earth radius are 2.998 × 108 m/s and 6.37 thousand km...
One goal of the Russian space program is to illuminate dark northern cities with sunlight reflected to the Earth from a 200 m diameter mirrored surface in orbit. Several smaller prototypes have already been constructed and put into orbit. (a) Assume that sunlight with intensity 1340 W/m2 falls on the mirror nearly perpendicularly and that the atmosphere of the Earth allows 78.3% of the energy of sunlight to pass though it in clear weather. What is the power received by...
The intensity of electromagnetic waves from the sun is 1.4 kW/m” just above the earth's atmosphere. Eighty percent of this reaches the surface at noon on a clear summer day. Suppose you think of your back as a 33.0 cm x 55.0 cm rectangle. Part A How many joules of solar energy fall on your back as you work on your tan for 0.500 hr ? Express your answer with the appropriate units. ? CH PÅ Value o 2 Units...
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