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1. A 31 g ice cube at its melting point is dropped into an insulated container of liquid nitrogen. How much nitrogen evaporates if it is at its boiling point of 77 K and has a latent heat of vaporization of 200 kJ/kg? Suppose for simplicity that the specific heat of ice is a constant and is equal to its value near its melting point.
2. The 1.25 kg head of a hammer has a speed of 8.2 m/s just before it strikes a nail (Fig. 14-17) and is brought to rest. Estimate the temperature rise of a 16 g iron nail generated by ten such hammer blows done in quick succession. Suppose the nail absorbs all the energy.
Two point charges 0.660 m apart experience a repulsive force of 0.376 N. The sum of the two charges equals 1.09*10^-5 C. Find the values of the two charges
A stunt man drives a car at a speed of 20 m/s off a 27-m-high cliff. The road leading to the cliff is inclined upward at an angle of 20?. How far from the base of the cliff does the car land
The outside mirror on the passenger side of a car is convex and has a focal length of -8.7 cm. Relative to this mirror, a truck traveling in the rear has an object distance of 12 m. Discover(a) the image distance and (a)the magnification of the mirro..
a square coil of wire containing a single turn is placed in a uniform 0.30 t magnetic field as the drawing shows. each
A 720-kg race car can drive around an unbanked turn at a maximum speed of 43 m/s without slipping. The turn has a radius of 160 m, What is the coefficient of static friction between the track and the car's tires
you are given vectors a? 5.1 i? 6.6 j and b? - 3.6 i 7.1 j. a third vector c? lies in the xy-plane. vector c? is
It collides with a 10,000 kg railway car resting at the bottom of the track with its brakes off. The two cars couple together and roll up the track to a height of h. find out h.
a tiny sphere of mass 7.30 microg and charge 2.80 nc is initially at a distance of 1.74 microm from a fixed charge of
An elevator cabin has a mass of 350.5 kg, and the combined mass of the people inside the cabin is 183.7 kg. obtain the tension in the cable
Two satellites are in circular orbits around a planet that has radius 9.00x10^6m. One satellite has mass 65.0 kg, orbital radius 8.00×10^7 m, What is the orbital speed of this second satellite
q1. the two blocks are on frictionless inclines and are in static equilibrium. the block on the left has a mass of 49
A tractor tows a plane from its airport gate, doing 8.9MJ of work. How far does the tractor move the plane
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