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A train moving with a constant speed of 75 km/hr moves east for 45 minutes then in a direction 20o east of north for 60 minutes. Find the magnitude of the average velocity of the train during this run?
A small button placed on a horizontal rotating platform with diameter 0.328 will revolve with the platform, How far from the axis can the button be placed, without slipping, if the platform rotates at 62.0
The deepest point in the ocean is in the Mariana Trench, about 11 km deep, in the Pacific. The density of seawater at the surface is 1.03 X 10^3 kg/m^3. Find its density at the bottom
A 10000 N car comes to a bridge during a storm and finds the bridge washed out. How fast should the car be traveling just as it leaves the cliff in order to clear the river and land safely on the opposite side
Calculate the pressure variation corresponding to a sound insensity of 10-16 W/cm2
A cord of length 1.4 meter is fixed at both ends. Its mass per unit length is 1.0 g/m and the tension is 11 N. Evaluate the frequency of the fundamental oscillation
A satellite in a circular orbit around the planet Glob-IV has an orbital period of 246 minutes. Find the height of the satellite above the planet's surface
A person runs up a long flight of stairs in 10 seconds. If the person's weight is 500 N and the vertical height of the stairs is 20 meters, what is the person's power output
A 200-g hockey puck is launched up a metal ramp that is inclined at a 30 degree angle. What speed does the puck have when it slides back down to its starting point
In a television set, electrons are accelerated from rest through a potential difference of 22 kV. Find the magnitude of the maximum magnetic force
An arrow is fired from a castle tower at an angle of 40 degrees above horizontal, and with a speed of 62 m/s. What is the speed of the arrow as it hits the ork
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1230 Hz, What is the speed of the bird
In a popular amusement park ride, a rotating cylinder of radius R = 3.10 m is set in rotation at an angular speed of 4.20 rad/s, as in the figure shown below. The floor then drops away, leaving the riders suspended against the wall in a vertical posi..
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