Question

A lightship with a reflective, square solar sail is placed into Earth orbit where the average intensity of sunlight is 1350 W/m 2.

A. What is the pressure from the sunlight on the solar sail?

B. What is the length of each side of the sail if it needs to produce a force of 225 N?

C. What is the peak magnetic field from sunlight in Earth orbit?

Answer #1

We want to design and build a solar sail that will carry us from
Earth to the Moon in a time of 3.0 weeks. Assuming this is a
simplified set up, where we are using the sun’s radiation to travel
directly away from it, a total distance of 385,000 km, in a time of
3.0 weeks, starting from rest.
a) What is the necessary acceleration (think back to
kinematics)?
b) What area of solar sail will the craft need, assuming...

The average intensity of sunlight at the top of the atmosphere
is 1380W/m2 . A small spacecraft with a solar sail with area 1.00
km2 placed there reflects sunlight for propulsion.
(a) What is the radiation pressure on the sail?
(b) What is the force on the sail?
(c) The spacecraft has a mass of 10 000 kg. What is its
acceleration?
(d) Starting from rest, how long would it take to reach 17 000
m/s? Give your answer in...

Like all light, the light from the sun is an electromagnetic
wave. In the vicinity of Earth, the average intensity of sunlight
is about 1400W/m^2. For this problem, assume that sunlight is a
monochromatic plane wave, so you can apply the equations for the
energy and pressure of an EM wave.
(a) What is the amplitude of the electric ﬁeld at Earth?
(b) If I go outside on a sunny day, the magnetic ﬁeld sensor on
my phone tells me...

Explore the dependence of sunlight on earth-sun distance. The
solar constant, S_0 is the solar radiation at zero zenith angle at
the mean earth-sun distance, R_m. As we learned in class the
intensity of solar radiation decreases with the square of the
distance. Use matlab to devise a function that calculates the daily
averaged solar radiation as it depends on earth-sun distance
(ignore seasonal changes in the sun's angle) through the course of
one year. Use for the eccentricity the...

A satellite orbits Earth with an orbit radius equal to 4 × 107 m (measured
from the center of the Earth). The satellite transmits electromagnetic waves to
2 × 109 Hz. Assume that the satellite transmits the radiation evenly
in all directions. The intensity of the EM wave received by an antenna
circular on the Earth's surface is 2 × 10-12 W / m2 when the satellite is
located 3 × 107 m above the antenna. The antenna disk has...

1a) It takes 6.7 years for radio signals from earth to reach a
distant spaceship. What is the distance to the spaceship?
b) A magnetic resonance imaging (MRI) machine creates images of
the human body using radio waves of frequency 46.2 x106
Hz. What is the wavelength of these radio waves?
c) A microwave beam has a cross-sectional area of 0.04
m2 and transmits an average power of
16000 W. Calculate the peak value of the electric
field of the...

1. Solar cells (the figure) can produce about 40 W of
electricity per square meter of surface area if directly facing the
Sun. How large an area is required to supply the needs of a house
that requires 21 kWh/day? Assume there are 9 hours of sunlight per
day. Express your answer to two significant figures and include the
appropriate units.
2. Energy may be stored by pumping water to a high reservoir
when demand is low and then releasing...

1) 2 point charges are separated by a distance of 8 cm. The left
charge is 48 mC and the right charge is -16mC. Using a full sheet
of paper: draw the 2 charges separated by 8cm, centered in the
sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet
length). [6] a) Draw field lines to indicate the electric fields
for this distribution. [4] b) Draw 3 equipotential surfaces, 1
each, that pass: -Through the...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 14 minutes ago

asked 16 minutes ago

asked 39 minutes ago

asked 51 minutes ago

asked 56 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago