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A rock mass of 6.00 kg is dropped from a stationary hot air balloon. Its potential energy at the top is 18,000 J. When its potential energy is 10,000 J, the rock is falling at _ m/s.
Four particles, one at each of the four corners of a square with2.5-m-long edges, are connected bymassless rods. Find the moment of inertia of the system about the z axis
The green hoop falls a distance d = 1.65 m. (After being released from rest.) How much time does the hoop take to fall 1.65 m?What is the magnitude of the final angular speed of the orange sphere (after the green hoop has fallen the 1.65 m)?
A playground merry-go-round has a radius of 4.50m and a moment of inertia of 240kg?m2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
A circular loop of wire with 10 turns, radius 0.241 m and resistance 0.235 Ohms is connected to a 13.1 V power supply. find The magnetic field at the center of this loop
Let B = 5.10 m at 60°. Let vector C have the same magnitude as vector A and a direction angle greater than that of vector A by 25°. Find the magnitude and direction of vector A
A certain type of laser emits light that has a frequency of 6.0 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.8 × 10-11 s. How many wavelengths are there in one pulse
A coil of wire has a resistance of 38.0 ? at 25° C and 43.7 ? at 52° C. What is the temperature coefficient of resistivity
A hockey puck with an intial velocity of 15 m/s slides 73 m before coming to rest. How long does it take for the puck to stop
A 0.27-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -10°C. In five minutes, the ice thickens by a small amount. Find the number of millimeters by which the ice thickens
A grizzly bear is sitting on a rock in the middle of a calm river when she observes a fish directly below. Find the actual depth at which the fish is swimming
A sled with a mass of 20 kg slides across a level mixture of snow and dirt having a coefficient of kinetic friction of 0.50. The sled is initially traveling 8.3 m/s. How far does it slide before coming to a stop?
A satellite is in a circular orbit about the earth (ME = 5.98 x 1024 kg). The period of the satellite is 2.11 x 104 s. What is the speed at which the satellite travels
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