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A penny is released from the top of a very smooth sphere of radius 1 meter. the sphere is fixed to platform and doesn't move. the penny slides down from rest and leaves the sphere at a certain point. how far will the penny fall away from the point of contact of the sphere and the platform
The weight of passengers on a roller coaster increases by 52% as the car goes through a dip with a 35m radius of curvature. What is the car's speed at the bottom of the dip
The coefficient of static and kinetic frictions between a 3 kg box and a desk are .4 and .3 respectively. What is the force of friction on the box
In an ice show a 65.0 kg skater leaps into the air and is caught by an initially stationary 85.0 kg skater. How much kinetic energy is lost?
Suppose a spherical planet of radius R and an average density 5.0 x 103 kg/m3; this is approximately the average density of earth. Evaluate what is the radius of the planet
An electrical cable consists of 184 strands of fine wire, each having 3.47 µ? resistance. What is the resistance of the cable
An air conditioner connected to a 150 V rms ac line is equivalent to a 9.8 resistance and a 1.97 inductive reactance in series. What is the impedence of the air conditioner
A length of wire has a total resistance of 120 ?. If cut up into N identical pieces, How many pieces did the original wire get cut up into
What is the magnitude of the force that each sphere experiences, and is the force attractive or repulsive?(b) The spheres are brought into contact and then separated to adistance of 2.10 cm. Determine themagnitude of the force that each sphere now ..
A 2.20-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 4.50sin(2*pi*t), Find the resonance angular frequency of the system
Archimedes principle can be used to calculate the density of a fluid as well as that of a solid. Calculate the fluids density
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
An ideal air conditioner operating on a Carnot cycle absorbs heat Q2 from a house at temperature T2 and discharges Q1 to the outside at temperature T1, consuming electrical energy E.
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