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A solenoid of radius 2.3 cm has 370 turns and a length of 25 cm. (a) Find its inductance. (b) Find the rate at which current must change through it to produce an emf of 73.
If this force causes the centripetal acceleration of the electron, what is the speed of the electron?
(a) What is the total momentum of the system of the two carts at this instant? (b) What was the velocity of the first cart when the second cart was still at rest?
The slower planet's orbital period is 7.93 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?
A satellite is in a circular orbit about the earth (M = 5.98 x 1024 kg). The period of the satellite is 1.38 x 104 s. What is the speed at which the satellite travels?
A simple single lens camera (biconvex lens) is used to photograph a man 1.5 m tall who is standing 5.0 m from the camera. if the mans image fills the length of a frame of film (35mm) what is the fo
Water containing 4 lbs/gal of salt enters at a rate in gal/min equal to half the current volume of water in the tank, and the well-stirred mixture leaves the tank at a rate in gal/min equal to a thi
A projectile is launched with an initial velocity of 80 m/s at an angle of 30º above the horizontal. Neglecting air resistance, what is the horizontal component of the projectile's acceleration
What are the magnitude and direction of the change in the translational momentum of the truck?
Crate on an Incline To push a 20.0 kg crate up a frictionless incline, angled at 16.0° to the horizontal, a worker exerts a force of magnitude 200 N parallel to the incline. The crate slides 1.4
The Apollo Lunar Module was used to make the transition from the spacecraft to the moon's surface and back. Consider a similar module for landing on the surface of Mars. Use conservation of mechanic
An electron moves with constant velocity through a region of space that is free of magnetic fields. Can one conclude that the electric field is zero in this region?
At 3.87 s after the explosion, the 2-kg fragment lands on the ground directly below the point of explosion. (a) Determine the velocity of the 0.97-kg fragment immediately after the explosion.
A 0.10kg dart is fired horizontally at the center of a 0.80kg vertically hanging block, sticking to it. The system reaches a maximum height, h, of 0.20m above the collision point. Find: a) The velo
A truck is traveling at 11.1 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between
How many years would it take to double the Sun's mass at this rate? How would the mass accretion affect the Earth's orbital period/distance from the Sun?
Using energy conservations, how would your calculated final velocity change if you threw a ball off a building straight downward at the same speed as you threw it upward? Explain/give an example.
If a dielectric is inserted between the plates of a parallel-plate capacitor that is connected to a 100-V battery, which decreases? The electric field between the plates decrease, voltage across cap
What is the vacuum wavelength vacuum in the visible range (380 nm to 750 nm) at which destructive interference causes the film to look dark in reflected light?
A potential difference of 120 V produces a current of 8.0 A in the heating element of a toaster. What is the resistance of this heating element while the toaster is carrying this current?
A 5.00-kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.20 mm deep, what is the average force exerted by the plate on the ball during the impact?
There is friction as the pulley turns. The block starts from rest, and its speed after it has traveled downwards a distance of D= 0.65 m, is 1.388 m/s. Calculate the amount of energy dissipated up t
A 500 watt heater is used to heat water in a plastic bucket. Assume that 90% of the heat produced by the heater goes into heating the water.
She is at rest relative to the spacecraft just before catching the 2.9 kg book. Find the astronaunts velocity just after she catches the book.