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If the speed of the rod in circuit 1 were twice that in circuit 2, what would be the ratio P1/P2 of the powers in the circuits?
The magnitude of the external magnetic field is changing at a rate of ΔB/Δt = 0.755 T/s, thereby inducing a current in the coil. Find the magnitude of the magnetic field at the center of
The horn issounded while the car is moving down the street. A bicyclistmoving in the same direction with one-third the car's speed hears afrequency of 415 Hz. What is the speed of the car? Is the cy
Use the length of one stellar day to find tangential (linear) speed of someone standing on the Earth's equator.
A car can decelerate at -4.80 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its deceleration if the road were inclined at 15° uphill? Assume the same
Use conservation of relativistic energy and momentum to determine (a) the kinetic energy of the electron, and (b) the wavelength of the recoiling photon. Use p = E/c
Calculate the average decelerating impact force per unit area, if a person falling with a terminal velocity of 62,5 m/s is decelerated to zero velocity over a distance of 1m.
Skater A has a mass of 33.5 kg and travels in the +x direction at 2.75 m/s. Skater B has a mass of 75.5 kg and is moving in the +y direction at 1.77 m/s. They collide and cling together. Find the fi
In this position the lunch box is a distance 50.0 m from the center of curvature of the curve. a) What is the speed of the bus.
A student tries to raise a chain consisting of three identical links. Each link has a mass of 210 g. The three-piece chain is connected to a string and then suspended vertically, with the student ho
If the box is a distance 1.83 m from the rear of the truck when the truck starts, how much time elapses before the box falls off the truck?
A charge of 3.45 µC is uniformly distributed on a ring of radius 9.0 cm. Find the electric field strength on the axis at the following locations.
How much force must be applied tangentially at the end of a crank handle 0.500 m long to bring the stone from rest to 120 rev/min in 7.00 s?
Two equal masses are connected by a light cord passing over a pulley of negligible mass. at the moment the system is in motion, with the right hand block moving downward at 1.2 m/s. what is the corr
A particle of mass m is released from a point between the two masses 20.0 cm from the 9.00 kg mass along the line connecting the two fixed masses. a) Find the magnitude of the acceleration of the pa
The density is 11.3 X 10^3 kg/m^3, and the density of water is 1.00 x 10 ^3 kg/m^3. Find the buoyant force on the wood and lead, and the mass of the lead.
Six parallel-plate capacitors of identical plate separation have different plate areas A, different capacitances C, and different dielectrics filling the space between the plates. Below is a generic
The diameter of the circle in which the discus moves is about 2.26 m. If the thrower takes 1.32 s to complete one revolution, starting from rest, what will be the speed of the discus at release?
A child pulls a wagon with a force of 10 N by a handle making an angle of 19 degrees with the horizontal. If the wagon has a mass of 5.7 kg, to the nearest hundredth of a m/s2 what is the accelerati
The capacitor in an RC circuit (R = 180 O, C = 69 µF) is initially uncharged. Find the charge on the capacitor and the current in the circuit one time constant (t = RC) after the circuit is co
An electron has an initial velocity of 9.00 x 106 m/s in the x direction. It enters a uniform electric field = (400 N/C), which is in the y direction. (a) Find the acceleration of the electron. answer
How many moles of air must escape from a 10m x 8.0m x 5.0m room when the temperature is raised from 0c to 20c? Assume the pressure remains unchanged at one atmosphere while the room is heated.
An 11W energy-efficient florescent lamp is designed to produce the same illumination as a conventional 80W lamp. How much does this energy-efficient lamp save during 89h of use? Assume a cost of $0.
The wire in a house circuit is rated at 22.8A and has a resistance of .24ohms. What is its power rating in W? and how much heat does the wire give off in 19.3 min in J?
What height will the ball reach after the first bounce if it is instead thrown vertically downward from the same height at 5m/s?