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What are the magnitude and direction of the vertical force (use up as the positive direction) exerted by the pole on the firefighter?
Vector A has a magnitude of 6 m and makes an angle of 28 degrees with the positive x axis. Vector B also has a magnitude of 4 m and is directed along the negative x axis. Enter your answers in dist
A small glass bead charged to 7.4nC is 4.0cm from a thin, uniformly charged, 10--cm long glass rod. The bead is repelled from the rod with a force of 900*10^-6N . What is the total charge |Q| on th
A wind force with component Fx acts on the skier. (Indicate the direction with the sign of your answer.) (a) What is Fx if the magnitude of the skier's velocity is constant?
What is the least coefficient of static friction between the cat and the merry-go-round that will allow the cat to stay in place, without sliding?
A circular-motion addict of mass 85 kg rides a Ferris wheel around in a vertical circle of radius 10 m at a constant speed of 6.0 m/s. (a) What is the period of the motion?
The axes of the wire and the cylindrical shell coincide. The wire carries a charge per unit length 8.80E-6 C/m and the shell carries a charge per unit length -1.76E-5 C/m. Find the magnitude of the
How long will it take a sample of polonium-210 with a half-life of 140 days to decay to one-sixteenth of its original strength?
You drop a stone into a deep well and hear it hit the bottom 1.60 s later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound of the sto
31g of copper pellets are removed from 300C oven and immediately dropped into 100mL of water at a 25C in an insulated cup. what will the new water temperature be?
A certain elevator cab has a total run of 190 m and a maximum speed of 305 m/min, and it accelerates from rest and then back to rest at 1.22 m/s2. How long does it take to make the nonstop 190 m ru
You are on an airplane traveling 30° south of due west at 150.0 m/s with respect to the air. The air is moving with a speed 38.0 m/s with respect to the ground due north. What is the heading of
If the kinetic energy of the swirling air in the eye could be converted completely to gravitational potential energy, how high would the air go?
A 60 g piece of ice at an initial temperature that is unknown is placed into a glass of 250 g of water sitting at room temperature when it is 80ºF in the room. The glass and ice come to therma
What is the maximum equivalent capacitance that can be obtained by combination of three capacitors of 1.5 µF, 2.1 µF, and 3.3 µF? What is the minimum equivalent capacitance that c
If the radius of the equipotential surface of point charge is 13.5 m at a potential of 2.10 kV, what is the magnitude of the point charge creating the potential?
Current state-of-the-art capacitors are capable of storing many times the energy of older ones. Such a capacitor, with a capacitance of 2.4 F, is able to light a small 0.30 W bulb at full power for
It takes +4.0 J of work to move two charges from a large distance apart to 3.0 cm from one another. The charges have the same magnitude. How large is each charge? And what can you tell about their
It climbs a frictional incline of height 3 m inclined at an angle 12, then moves along a second frictional surface of coefficient 0.19 before coming to rest. The acceleration of gravity is 9.8 m/s2
Whenever the velocity changes, there is a non-zero acceleration. The change can be in only the magnitude of the velocity, in only the direction of the velocity, or in both the magnitude and the dir
A large asteroid of mass 77100 kg is at rest far away from any planets or stars. A much smaller asteroid, of mass 610 kg, is in a circular orbit about the first at a distance of 311 meters as a resu
Two new particles, which have identical positive charge q3, are placed the same 8.09 centimeters apart, and the force between them is measured to be the same as that between the original particles.
Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles either were captured by the shielding or penetrated completely through the shielding. What perce