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A laser beam aimed from the earth is swept across the face of the moon.
a)If the beam is rotated at an angular velocity of 1.30×10?3rad/s, at what speed does the laser light move across the moon's surface?
b) If the diameter of the laser spot on the moon is 6.15km , what is the angle of divergence of the laser beam?
Suppose a disk of radius R and mass M starts from rest at a height of 2.5m, What is the linear speed of the disk when it leaves the incline
An ideal gas at 12.4 °C and a pressure of 1.41 x 105 Pa occupies a volume of 2.85 m3. How many moles of gas are present
The power supply for a pulsed nitrogen laser has a 0.0050-mF capacitor with a maximum voltage rating of 30 kV, calculate the power of the laser pulse
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 10 s, it rotates 2 revolutions. What was the angular acceleration during this time
A uniform plank of length 5.5 m and weight 205 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support .To what distance x can a person who weighs 447-N walk on the overhanging part of the plank before it just ..
As you may have learned when studying the properties of thermal energy, building contractors often install double-glazed windows to prevent thermal energy (\"heat\") from entering/exiting the building, find the shift in path ?x as the light enters ..
After falling from rest from a height of 35 m, a 0.45 kg ball rebounds upward, reaching a height of 25 m. If the contact between ball and ground lasted 1.8 ms, illustrate what average force was exerted on the ball?
the label on a soft drink states 15.fl oz (444g) provides 220 kcal. The drink is cooled to 15degree Celsius before it's consumed. Find net energy content of drink
two flexible wires (massless) suspend a 10 cm-long conductor in the magnetic field with b = 4.2T. what is the current to let the wire just have zero tension
A 0.15-kg apple falls off a tree branch that is 2.8m above the grass. The apple sinks 0.066m into the grass while stopping
A taut rope has a mass of 0.160 kg and a length of 3.40 m. What power must be supplied to the rope in order to generate sinusoidal waves having an amplitude of 0.120 m and a wavelength of 0.490 m and traveling with a speed of 31.5 m/s?
Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person, What is the largest possible value for the frequency of the other ultrasonic wave
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