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A meter stick is supported on a fulcrum at the 17 cm mark. A 0.70 kg object is hung from the zero end of the meter stick, and the stick is balanced horizontally. What is the mass of the meter stick?
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
A rocket rises vertically, from rest, with an acceleration of 4.0m/s2 until it runs out of fuel at an altitude of 1400m. After this point, What maximum altitude does the rocket reach
If a simple pendulum of length 2.09 meters is subjcted to a restoring force of 3 Newtons when displaced .15546 meters from equilibrium, what is the mass of the pendulum
You can launch the proton from the surface of a sphere of with charge Q and radius R, from the center of a ring of charge Q and radius R, or from the center of a disk of charge Q and radius R. Which is the best choice.
A 5000kg lunar lander is in orbit 30km above the surface of the moon. It needs to move out to a 500km-high orbit in order to link up with the mother ship that will take the astronauts home. How much work do the thrusters do?
A container holds 2.0 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinematic energy of an 8.0 X 10^-3kg bullet with a speed of 770m/s
A 9.66 × 1014 Hz electromagnetic wave propagates in carbon tetrachloride with a speed of 2.05 × 108 m/s. The wavelength of the wave in vacuum is closest to:
A car with mass of 1000.0 kg accelerates from 0 m/s to 40.0 m/s in 13.0 s. Ignore air resistance. What volume of gasoline is consumed? Assume that the burning of 1.0 L of gasoline releases 46 MJ of thermal energy
a stone falls from rest from the top of a cliff. a second stone is thrown downward from the same height 3.4 s later
The given pair of capacitors in the figure below is fully charged by a 10.0-V battery. After 1.20 ms, what is the current in the resistor
a 5.0 kg ball is initially sitting at rest on top of a 48 meter hill. the ball is pushed with a force of 25 n for 3.0 s
Two equally charged, 1.00 {rm g} spheres are placed with 2.00 {rm cm} between their centers. When released, each begins to accelerate at 225 {rm m/s^2}. What is the magnitude of the charge on each sphere.
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