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How fast (as a percentage of light speed) would a star have to be moving so that the frequency of the light we receive from it is 14.0 % higher than the frequency of the light it is emitting?
A 75kg hiker climbs to the top of a 4100m -high mountain. The climb is made in 5.0h starting at an elevation of 3000m, Calculate the work done by the hiker against gravity
A laboratory technician drops a 0.0850-kg sample of unknown material, at a temperature of 100.0C, into a calorimeter. The calorimeter can, Compute the specific heat capacity of the sample
A vertical solid steel post of diameter d = 23.1 cm and length L=2.36 m is required to support a load of mass m = 8260 kg. What is the change in the post's length when the load is applied
If the first-order maximum for pure wavelength light falling on a double slit is at an angle of 10.0 degrees, What is the angle of the first minimum
An open container holds ice of mass 0.595kg at a temperature of -13.5 celcius . The mass of the container can be ignored. How much time passes before the ice starts to melt
A galago, a very small primate, can extend its legs by about 16 cm during a jump, during which it accelerates at 140 m/s2. Which can jump higher
If the water in the river is flowing at 3.0 m/s, explain how long does it take the boat to make a round trip consisting of a 250 m displacement downstream followed by a 250 m displacement upstream?
What is the magnitude of the net torque exerted on the branch by the children? Suppose that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.
After a completely inelastic collision, two objects of the same mass and same initial speed are found to move away together at 1/2 their initial speed
A 290-mL spherical flask contains 0.075 mol of an ideal gas at a temperature of 345 K. What is the average force exerted on the walls
A converging lens has a focal length of f = 29 cm. If an object is placed 40 cm from the lens, where will the image be formed.
A woman accelerates her motorized scooter, with the engine on, down a 13-m-long ramp that starts at a height of 2.2 m. how many joules of energy did friction absorb
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