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A train moves due north at a rate of 9.6933 m/s relative to the ground. what is the magnitude of the ball's speed as measured by an observer on the ground
The weight of a rectangular block of low-density material is 15.0 N. With a thin string, the cen- ter of the horizontal bottom face of the block is tied to the bottom of a beaker partly filled with
Two small spheres hang in equilibrium at the bottom ends of threads, 40.0 cm long, that have their top ends tied to the same fixed point. Find the distance between the centers of the spheres
A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm, Calculate the speed of the proton
A light bulb is wired in series with a 133-? resistor, and they are connected across a 120-V source. What are the two possible resistances of the light bulb
A large container, open at the top, is half-filled with water (?H2O = 1000 kg/m3). Determine the fractions of the cube immersed in water and oil
Suppose the superhero had flown 145 m at a 125° angle with respect to the positive x-axis
A 115-V source of emf is attached to a heating element with is a coil of nichrome wire (r=100*10^-8) of cross section 1.20 mm^2. What must be the length of the wire
A long straight wire carries a current of 4.5 A. The wire is horizontal in the plane of the page (screen), What is the force that acts on the electron
A train moving with constant velocity travels 190m north in 14s and an undetermined distance to the west. Find the direction of the train's motion relative to north
You are given an ideal air-filled parallel plate capacitor with plates of area 45.0 cm2 and separation 2.10 mm. What is the new value of the capacitance
A tennis player hits a ball 2.0 m above the ground. The ball leaves his racquet with a speed of 23.0 m/s at an angle 5.5 degrees above the horizontal. By how much does the ball clear the net
A train moving with constant velocity travels 190 north in 14s and an undetermined distance to the west. How far west has the train traveled
A hot air balloonist rises vertically with a constant velocity of 6.0 m/s and releases a sandbag at the precise instant when the balloon is 40.0 m above the ground. what is the time when the sandbag
a man is standing near a gate and a flag pole. The gate is 15 ft from the pole. If the pole is h=35 ft tall, how far is the man from the gate
Mary needs to row her boat across a 200 m-wide river that is flowing to the east at a speed of 1.1 m/s. Mary can row with a speed of 2.4 m/s. What is her speed with respect to the shore
A 60-kg student traveling in a car with a constant velocity has a kinetic energy of 1.2 X 104 J. What is the speedometer reading of the car
While rearranging a dorm room, a student does 400 J of work in moving a desk 2.0 m. What was the magnitude of the applied horizontal force
A proton is located at the origin, and a second proton is located on the x-axis at x = 5.10 fm (1 fm = 10-15 m). If the two protons are released from rest and the alpha particle remains fixed, calcula
One of the most powerful cranes in the world operates in Switzerland. It can slowly raise a load of M = 5230.0 tonnes to a height of h = 12.0 m, How much work is done by the crane
A 0.24-kg ball on a stick is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, Find the tension in the stick
You close the top of your straw with your thumb and lift the straw out of your glass containing Coke. How large is the error (in per cent) if you neglect the air in the straw
A satellite circles the earth in an orbit whose radius is 3.26 times the earth's radius. What is the period of the satellite
On a banked race track, the smallest circular path on which cars can move has a radius of 106 m, compute the largest speed at which cars can move on this track without relying on friction
A particle leaves the origin with an initial velocity v(bold)=2.4m/s xhat, How far does the particle move in the x direction before it turns around