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A cannon tilted up at a 25 degree angle fires a cannon ball at 81.0m/s from atop a 18.0m -high fortress wall
In a ballistic pendulum experiment a 20 g bullet is shot into a 2.3 kg block of wood suspended by a cord of negligible mass. what is the approximate muzzle speed (in m/s) for the gun that fired the bu
A 120-V motor has mechanical power output of 2.50 hp. It is 90.0% efficient in converting power that it takes in by electrical transmission into mechanical power, Find the current in the motor
The back wall of a home aquarium is a mirror that is a distance of 33.0 cm away from the front wall. The walls of the tank are negligibly thin, Calculate the apparent distance between the fish and th
The parallel plates in a capacitor, with a plate area of 6.10 cm2 and an air-filled separation of 3.20 mm, are charged by a 4.30 V , find the work required to separate the plates
An aluminum wire having a cross-sectional area of 4.00 3 1026 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire
In a proton accelerator, the energy of proton is 20MeV, the diameter of the beam is 2.0mm, Find the current density and the particle density in the beam
A compound microscope has an objective lens of focal length 15.0 mm and an eyepiece that gives an angular magnification of 5.00 for a final image at infinity, What is the total magnification of the
A light source emits two spectral lines: one at 528 nm and one at 667 nm. what is the distance between the two spectral lines in the first order spectrum
a ball is tossed directly upward at an initial speed of 5.7m/s and is caught when it falls back down to the throwers hand, how much total time is the ball airborne
A 1.5-H inductor is connected in series with a 200-Ω resistor through a 15-V dc power supply and a switch, what is the maximum energy stored by the inductor
A charge 2q is located at the origin. A charge -3q is located at x = d, y = 0, z = 0. Where is the electric field zero
An electron is orbiting a proton under the Coulomb force in a hydrogen atom at a radius of 0.52 × 10-10 m
The transformer in the power supply for a computer's 500-GB external hard drive changes a 120-V input voltage, what is the current in the primary and secondary when the drive is in operation
A water pipe having a 2.96 cm inside diameter carries water into the basement of a house at a speed of 0.804 m/s, find water pressure and speed at the second floor
A cylindrical tank with a large diameter is filled with water to a depth D = 0.310 m. What is the rate at which water flows out, in cubic meters per second
Students in a physics lab are to determine the specific heat of copper experimentally. They place 0.150 kg of copper shot into boiling water, what is the specific heat of copper
A person pushes horizontally with a force of 220 N on a 66 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.28. What is the magnitude of the frictional force
If the electric flux through a closed surface is determined to be 2.10N?m2/C , how much charge is enclosed by the surface
A 9.30 kg monkey is hanging by one arm from a branch and swinging on a vertical circle. Calculate the magnitude of the centripetal force acting on the monkey
Two identical capacitors are connected in series to a battery. What is the magnitude of the charge on each plate
A light source emits two spectral lines: one at 473 nm and one at 722 nm. what is the distance between the two spectral lines in the first order spectrum
A car travels at a constant speed around a circular track whose radius is 2.51 km. What is the magnitude of the centripetal acceleration of the car
A 5.20 microFarad parallel-plate air capacitor has a plate separation of 5.00mm, Calculate the energy density in the region between the plates, in units of J/m^3
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.27 × 10-6 T. What is the intensity S of the wave