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A juggler's hands are 80 cm apart, and the balls being juggled reach a maximum height of 100 cm above the juggler's hands.
(a) at what velocity do the balls leave the juggler's hands?
(b) If four balls are being juggled, how often must the juggler catch a ball?
A basketball player makes a jump shot. The 0.600 kg ball is released at a height of 2.00 m above the floor with a speed of 7.20 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.20 m/s Find the work done on the ball by air ..
Consider the collision between two hockey pucks in the figure below. They do not stick together. Their speeds before the collision are v1i = 27 m/s and v2i = 14 m/s. What is the final velocity of the other puck
a heat engine operates as a reversible carnot cycle transfers 6.0 kw of heat from a reservoir at 1000 k and then
A 68.4-kg skier coasts up a snow-covered hill that makes an angle of 25.5 ° with the horizontal. TWhat is the magnitude of the kinetic frictional force
Light from an argon laser strikes a diffraction grating that has 5395 grooves per centimeter. Determine the wavelength of the laser light
A dipole is formed by point charges +3.8 micro Coulomb and -3.8 micro Coulomb placed on the axis at (0.45 m, 0) and (-0.45m, 0), respectively. At what positions on the axis does the potential have the value 7.7×105 V? There should be an x1 and an ..
A laser used to weld detached retinas emits light with a wavelength of 652{\rm nm} in pulses that are 20.0{\rm ms} in duration. What is the energy of one photon in electron volts
A sound wave with intensity 23 mW/m2 interferes constructively with a sound wave that has an intensity of 16 mW/m2. What is the intensity of the superposition of the two
The two stars in a binary star system have masses 1.7×10^30 kg and 6.1×10^30 kg. What is the speed of the lightest star
A solid rock, suspended in air by a spring scale, has a measured mass of 9.00 kg. What is the density of the rock
A planet's moon travels in an approximately circular orbit of radius 5.4 107 m with a period of 7 h 21 min. Calculate the mass of the planet from this information
The primary coil of a transformer has 232 turns; the secondary coil has 1900 turns. An alternating current is sent through the primary coil. What is the emf amplitude in the secondary
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