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A girl is sledding down a slope that is inclined at 30º with respect to the horizontal. The wind is aiding the motion by providing a steady force of 184 N that is parallel to the motion of the sled. The combined mass of the girl and the sled is 56.0 kg, and the coefficient of kinetic friction between the snow and the runners of the sled is 0.106. How much time is required for the sled to travel down a 107-m slope, starting from rest?
A water pipe decreases in diameter from 16 cm to 8 cm. In the wider section the average velocity is 30.0cm/s. what is the volume rate of flow in the wide section in m cube/s
A diagnostic ultrasound echo is reflected from moving blood and returns with a frequency 314 Hz higher than its original 2.00 MHz. What is the velocity of the blood
Two infinite parallel plates separated by distance S are at potentials 0 and V0. What are the charge densities on the plates
Sketch a vector diagram of the earth's magnetic field. The dip angle is 65 degrees, Determine Bearth by simple trigonometry
An electric vehicle starts from rest and accelerates at a rate of 2 m/s2 in a straight line until it reaches a speed of 25.00 m/s. The vehicle then slows at a constant rate of 1.1 m/s2 until it stops. (1) How much time elapses from start to stop? ..
A commuter backs her car out of her garage with a constant acceleration of 1.60 m/s2. If she then brakes to a stop in 0.8 s, what is her (constant) deceleration
q1. a solenoid is formed by winding 26.9 m of insulated silver wire around a hollow cylinder. the turns are wound as
A 0.200 kg hammer is moving horizontally at 8.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. Calculate the duration of the impact
A 76 man weighs himself at the north pole and at the equator. How much higher is the scale reading in the north pole and by how much
It is desired to construct a solenoid that will have a resistance of 6.00 (at 20°C) and produce a magnetic field of 4.00 10-2 T at its center when it carries a current of 4.80 A. estimate the length the solenoid should have
A pulsar is a rapidly rotating neutron star. The Crab Pulsar is located in the Crab Nebula in the constellation Taurus. Find the pulsar's angular velocity
a blue cart (mass=0.400kg) makes an elastic collision with a red cart (mass=0.750kg), How much kinetic energy is lost in the collision
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