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A large wooden crate is pushed along a smooth, frictionless surface by a force of 100N. The acceleration of the crate is measured to be 2.5 m/s2. What is the mass of the crate?
TV channel 3 (VHF) broadcasts at a frequency of 55.0 MHz. TV channel 23 (UHF) broadcasts at a frequency of 548 MHz. Find the ratio (VHF/UHF) of the wavelengths for these channels
Calculate for the capacitance, the charge of plate, and magnitude of electric field between the plates for a capacitor whose plates are 11 mm apart are 2.00 m-2 in area and being connected to a source with potential difference of 270V.
a charge of 23.9 c is at the origin. when charge q is placed at 2 m along the positive x axis the electric field at 2 m
A 5.20 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. At what height above the surface of the earth does t..
A 2.5-m^3 cylinder of oxygen (O2) is kept in a machine shop. The oxygen in the tank is kept at a temperature of 80 °C and a pressure of 0.6 MPa. what is the new pressure in the tank
calculate the de broglie wavelength of a 4.7 mev ? particle emitted from an atomic nucleus whose diameter is
A capacitor with initial charge q0 isdischarged through a resistor. What multiple of the time constantτ gives the time the capacitor takes to lose(a) the first 1/5-th of its charge
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is h. What was the direction of the mug's velocity just before it hit the floor
The wires in a household lamp cord are typically 3.0 mm apart center to center and carry equal currents in opposite directions. Is the force attractive or repulsive
A block (mass = 2.0 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.1 10-3 kg · m2), Find the angular acceleration of the pulley
A bicycle with 0.80 meter diameter tires is coasting on a level road at 5.6 m/s. A small blue dot has been painted on the tread of the rear tire. Find the speed of the blue dot when it is 0.80 meter above the road
The light from a red laser pointer has a wavelength of about 600nm. If this laser has a power of 0.27 mW, what is the momentum carried by a 3.1-s pulse of this radiation?
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