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A rock is tossed straight up with a velocity of 14 m/s When it returns, it falls into a hole 10m deep.
What is the rock's velocity as it hits the bottom of the hole?
How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?
A Carnot engine performs work at the rate of 480 kW as using 640 kcal of heat per second. If the temperature of the heat source is 540°C, at what temperature is the waste heat exhausted.
A music store has jazz, classical, country-western and rock music albums on tapes and CDs in the following quantities finding the probability.
suppose a uniformly charged ring in the xy plane, centered at the origin. The ring has radius a and positive charge q distributed evenly along its circumference.
Two children tug on a toy of mass 2.0 kg. Costa pulls with a force of 10.0N [W 30degrees S]. The toy slides with an acceleration of 2.5 m/s^2 in the direction of the net force.
What should the charge (sign and magnitude) of a particle of mass 1.21 be for it to remain stationary when placed in a downward-directed electric field of magnitude 610.
A damped mass-spring system oscillates at 140 Hz. The time steady of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.6 cm and the energy of the oscillating system is after that 86 J.
Discuss briefly centripetal acceleration, the speed and the force exerted by a ball attached to a string.
A ball of mass 0.113 kg is dropped from a height of 1.92m above ground. The acceleration of gravity is 9.8m/s^2.Neglecting air resistance find the speed of the ball when it is at a height of 0.812 m above the ground. Answer in units of m/s.
Show that the horizontal resultant of these two forces on the lamp is zero. Work out the weight of the lamp.
A point charge q1=4nC is placed at the origin, and a second point charge q2= -3nC is placed on the x-axis at x= 20cm. A third point charge q3=2 nC is to be placed on the x-axis between q1 and q2.
What horizontal force is needed to hold bag in new position
A heavy rope used for as a mooring line for a cruise ship sags a shown. If the mass of the rope is 96 kg, what are the tensions in rope at A and B.
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