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A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 25 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 175 meter), the block swings toward the outside of the curve. Then the string makes an angle θ with the vertical. Compute what is the angle that the string makes.
The mass of the sun is 1.99 X 10^30 kg and its distance from Earth is 150 million kilometers (150 x 10^9 meters). What is the gravitational force between the sun and Earth?
A 2.30 kg mess kit sliding on a frictionless surface explodes into two 1.15 kg parts: 2.32 m/s, due north, and 5.90 m/s, What is the original speed of the mess kit
A 2.00kg mass is pushed against a horizontal spring of force constant 28.0N/cm on a frictionless air table. find the greatest speed the mass reaches
Water flows at 0.56 m/s during a pipe 16 cm in diameter when the pressure is 460,000 Pa. Decide the water velocity and the pressure in the pipe are if it shrinks down to 5 cm in diameter. You can assume that the pipe is horizontal and ρwater = 1000k..
The eye is a multiple lens system, but can be thought of as a single lens system for the purpose of this discussion. What is the effective focal length of the eye
The convex lens of a copy machine has a focal length of 25 cm. A letter to be copied is placed 40.0 cm from the lens.
Submarine propeller spins at 200 revolutions per minute. Angular velocity in radians per second?
A railroad flat car carrying a trumpet player is rolling toward youat 15m/s. You are stationary. What frequency note does the trumpeter hear her self playing
Two positive point charges, each of which has a charge of 3.4 × 10?9 C, are located at y= + 0.80m and y= ? 0.80m, Find the magnitude of the resultant electrical force on a charge of 9.0 × 10
in a long solenoid the density of the wire is 180 turnscm. if the current in the wire is 0.680a what is the strength of
a parallel-plate capacitor is connected to a battery. the energy of the capacitor is . the capacitor is then
The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash, Assuming that the flash lasts for 4.6 ms, find the effective power or "wattage" of the flash
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