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What recoil velocity does she acquire in response to a single shot from a stationary position, assuming that no external force keeps her in place?
A wire with a length of 3.6m and mass of 0.75kg is in a region of space with a magnetic field of 0.84T. What is the minimum current needed to leviate the wire?
What is the velocity of the first log just before the lumberjack jumps off? (Indicate the direction of the velocity by the sign of your answers.)
A 55 kg swimmer is standing on a stationary 170 kg floating raft. The swimmer then runs off the raft horizontally with a velocity of +4.3 m/s relative to the shore. Find the recoil velocity that the
An electron moves with speed 5.50 *10^5 m/s in a uniform magnetic field of 1.2 T, pointing south. At one instant, the electron experiences an upward magnetic force of 1.70* 10^-14 N.
Assume that the resistivity of tungsten varies linearly with temperature even over the large temperature range involved here, and find the temperature of the hot filament. Assume the initial tempera
A student on the bus is moving toward the back of the bus with a running speed of 2 m/s. What is the x-component of the velocity of the child relative to the sportscar?
A proton accelerates from rest in a uniform electric field of 660 N/C. At one later moment, its speed is 1.40 Mm/s (nonrelativistic because v is much less than the speed of light). (a) Find the acc
An electron and a proton are each placed at rest in a uniform electric field of magnitude 570 N/C. Calculate the speed of each particle 47.6 ns after being released.
You have two pennies that you throw upward from your hand 1.5m above the ground one after the other. The first penny is thrown upward with a speed of 20m/s.
Determine the acceleration due to gravity at that height and find the orbital velocity and the period of the space station.
Compare the resulting electrostatic repulsion with the gravitational attraction between the Moon and the Earth. (The mass of the Earth is 5.97 x 1024 kg, the mass of the Moon is 7.36 x 1022 kg, and
Very small losses, find a condition that relates the mechanical impedances of the supports at the ends of a bar of length L and longitudinal wave speed c if the bar is to have an integral number of
A bar of length L and mass M is fixed at one end and free at the other. What mass m is attached to the free end to decrease the fundamental frequency of longitudinal vibration by 25% from its fixed
A 2600 kg truck traveling north at 40 km/h turns east and accelerates to 55 km/h. (a) What is the change in the truck's kinetic energy?
Two parallel circular plates with radius 7.0 mm carrying equal-magnitude surface charge densities of ±3.0 µC/m2 are separated by a distance of 1.0 mm. How much stored energy do the plat
A charge of 2.05 µC is uniformly distributed on a ring of radius 8.5 cm. Find the electric field strength on the axis at the following locations.
what is the coefficient of kinetic friction between the block and the incline, and the frictional force acting on the block and the speed of the block after it has slod 2 m.
Determine the electric pontential V, relative to V=0 at r=∞, as a function of the distance r from the center for (a) r > r2, (b) r1 < r < r2 and (c) 0 < r < r1. Is V continious
Let the radius of the spherical cell be 50μm, the height of the cylindrical cell be 10μm, and assume that diffusion occurs across all surfaces of the cell.
A 5000 kg rocket is launched at a 44.7 degree angle. The thrust of the rocket motor is 140,700 N. a) Find an equation y(x) that describes the rocket's trajectory.
If they are to maintain the same energy expenditure rate, how much faster do they now have to breathe?
A person of a Haz Mat team will be working for 1.5 hr while breathing oxygen from a pressurized tank. While working, they will be burning energy at a rate of Cal/hr. The tank stores the gas at 20 MP
It is surrounded by a concentric metal (conducting) spherical shell of inner radius r1 and outer radius r2, which carries net charge +Q. Determine the resulting electric field in the regions (a) 0&l
A 3. 00kg block starts from a rest at the top of a 34.5 degree incline and slides 2.00 m down the inclinein 1.20 s, what is the accelartion of the block.