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The Voyager 1 spacecraft is expected to continue broadcasting data until at least 2020, when it will be some 14 billion miles from Earth. How long will it take Voyager's radio signals, travel- ing at the speed of light, to reach Earth from this distance?
Monochromatic light from a distant source is incident on a slit 0.750 {rm mm} wide. On a screen 2.00 {rm m} away, the distance from the central maximum of the diffraction pattern to the first least amount is measured to be 1.35 {rm mm}.
the sun is shining and a spherical snowball of volume 390 ft3 is melting at a rate of 15 cubic feet per hour. as it
A comet has a very elliptical orbit with a period of 124.0 y. If the closest approach of the comet to the Sun is 0.09 AU, what is its greatest distance from the Sun
A diving board length = 5.60 that weighs 210 is supported by two pillars. One pillar is at the left end of the diving board; other is distance = 1.60 away. Find out the magnitude of force exerted by the left pillar while an 85.0 diver stands at th..
15 mol of an ideal gas expands isothermally at 373 K to 12.5 its inital volume. Find the heat flow into the system
Two air carts of mass m1 = 0.84kg and m2 =0.42 kg are placed on a frictionless track. Cart 1 is at restinitially, and has a spring bumper with a force constant of 690N/m.
A 1320-kilogram car, moving with a speed of 15.0 m/s, is on a flat, circular curve having a radius of 57.0 meters. How much friction is required to keep the car on the road? What is the coefficient of friction between the road and the tires?
A factory worker pushes a 31.4kg crate a distance of 4.35m along a level floor at constant velocity by pushing downward at an angle of 30.3 degrees below the horizontal. What is the total work done on the crate
Your grandfather clock's pendulum has a length of 0.9939 m, how should you adjust the length of the pendulum
What imperfection in the operation of the eye causes farsightedness? What type of lens is used to correct this? What imperfection in the operation of the eye causes nearsightedness? What type of lens is used to correct this?
A 60 lb sphere A of radius 5.0 inches is moving with a velocity of 5 ft/s to the right along a flat, frictionless surface. find the velocity of each sphere immediately after impact
neutron stars consist only of neutrons and have unbelievably high densities. a typical mass and radius for a neutron
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