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Person A is standing in a parking lot. Person B is riding in a car that is moving with velocity (v). Person B shines a flashlight in the direction he or she is moving. What speed of light will each person measure?
a playground merry go round has a radius of 4.40 m and a moment of inertia of 245kg.m^2 and turns with negligible friction about a vertical axle through is center. What is the average power supplied by the child
A uniform 110 g rod with length 70 cm rotates in a horizontal plane about a fixed, vertical, frictionless pin through its center. Find the angular speed of the system at the instant the beads reach the ends of the rod
A student is pushing a crate up a 20 degree incline. Find the magnitude of the normal force between crate and incline
an explorer is caught in a whiteout in which the snowfall is so thick that the ground cannot be distinguished from the
The color index of another bright star in our summer sky, Antares, is B-V=1.67. Is Spica hotter or cooler than Antares? Explain your answer (you should include some discussion of the properties of blackbody radiators in your answer).
a block of wood of mass m1= 1 kg slides to the right on a frictionless horizontal table with a speed of 30 m/s. how much is the spring compressed by the wood
Establish an average acceleration
Charge of uniform density ρ = 3.4 µC/m3 fills a nonconducting solidsphere of radius 5.3 cm. What is the magnitude of the electric field 3.5 cm from the center of the sphere?
Ten days after it was launched toward Mars in December 1998, find the spacecrafts kinetic energy relative to the earth
A 0.9- m long rod rotates about an axis through one end and perpendicular to the rod, with an angular speed of 1.6 rev/s. The plane of rotation of the rod is perpendicular to a uniform magnetic field of 1.3 T. Calculate the emf induced across the end..
A crane is required to pull up a load of building supplies from the ground to a height of 90 m at a constant velocity. Find the power output required of the motor that pulls the cable up
A .400 kg object isswinging in circular path and in a vertical plane on a .500 mlength string. what is the tension on the string when the object is at the bottom of the circle
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