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A tennis player tosses a tennis ball straight up and then catches it after 1.86s at the same height as the point of release.
(a) What is the acceleration of the ball while it is in flight?
(b) Find the initial velocity of the ball (m/s upward).
(c) Find the maximum height it reaches.
A disk with a mass of 37.5kg and a radius of 38.3cm is mounted on a frictionless horizontal axle. A string is wound many times around the disk and then attached to a 56.4kg block. Find the acceleration of the block, assuming that the string does n..
An aluminum rod is 22.0 cm long at 20°C and has a mass of 350 g. If 14,000 J of energy is added to the rod by heat, what is the change in length of the rod
A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.2 g/m and the tension is 12 N. Calculate the frequency of the fundamental oscillation
Sirius has a luminosity of 8.4 * 10^27 Watts and a mass of 2.1 times the mass of the Sun, How much hydrogen does Sirius convert into helium each second
a student is reading material written on a blackboard. her contact lenses have a refractive power of 57.50 diopters; the lens to retina distance is 1.750cm. how far in meters is the blackboard from her eyes
A 12-V battery is connected in series with a switch, 6.0-ohms resistor and coil. What energy is stored in the coil when the current is 2.0 A
In a heat conductivity experiment, a slab of silicon of thickness 2 x 10^-3m and area of 0.40m^2 seperates condensing steam(lv=540cal/g) at 100 degree C, Find the increase of entropy in the universe during one minute of this experiment
Spacecraft A is being overtaken by spacecraft B that is traveling at 0.40c relative to spacecraft A. How far away is spacecraft A when the missile is fired according to spacecraft B
How many electrons should be removed from an initially uncharged spherical conductor of radius 0.29 m to produce a potential of 6.8 kV at the surface
what is the magnitude FN at the highest point. The positive charges are arranged in a square. sides- .10 m the top right is 9 nC bottom right is 3 nC and the bottom left is 1 nC. find the magnitude of the electric field at the fourth corner of the ..
Suppose that when a 12.0-V battery drives a current of 6.7 A through a resistive device, How much is the internal resistance (in ohms) of the 12.0-V battery
sketch a scaled ray diagram and show the location of the iamge using 3 principle rays, calculate the magnification of the object
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