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A meter stick balances at the 50.0-cm mark. If a mass of 50.0 g is placed at the 90.0-cm mark, the stick balances at the 61.3-cm mark. What is the mass of the meter stick?
What is (a) the atomic number (Z) and (b) the atomic mass number of the daughter nucleus produced by the alpha decay of the real or imaginary nucleus of 85X188?
Water at 33.0 °C is sprayed onto 0.156 kg of molten gold at 1063 °C (its melting point). The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C. What is th
Near the bottom of the spring, the spring only supports the mass of the mass hanger (50 g). Assuming its k value is 12 N/m, how much does it want to stretch?
A magnetic field increases from 0 to 0.30T in 1.5 seconds. How many turns of wire are needed in a circular coil 15cm in diameter to produce an induced emf of 0.80 volt?
Interstellar space has a magnetic field on the order of 0.1 nT. Matter in this space is mainly Hydrogen atoms (about 1 per cubic centimeter) moving with speeds of about 1 km/s. Compare the energy in
The concrete sections of a certain superhighway are designed to have a length of 23.0m. The sections are poured and cured at 10.0°C. What minimum spacing should the engineer leave between the se
The polar ice caps contain about 2.3 * 10^19 kg of ice. This mass contributes essentially nothing to the Earth's moment of inertia because it's located near the poles. Estimate the change in the len
Gas is confined in a tank at a pressure of9.8atm and a temperature of26.5°C. If two-thirds of the gas is withdrawn and the temperature is raised to68.0°C, what is the pressure of the gas rem
A space probe with a rest mass of 8.2*10^7kg and a speed of 0.5c smashes into an asteroid at rest and becomes embedded within it.
A rigid tank contains 1.30 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 28.2 atm to 4.60 atm. Assume the vol
A spring with constant k = 800 N/m is compressed 12 cm from its equilibrium position. A spring with spring constant k = 400 N/m has the same elastic potential energy as the first spring when it e
Given a typical wave function describing the state of a particle, how would you determine the shape of the potential U(X) in assuming that the wave function describes an energy eigen state while bei
How large an emf (rms) will be generated in an antenna that consists of a 426 loop circular coil of wire 1.54 cm in diameter if the EM wave has a frequency of 886 kHz and is transporting energy at a
A and B have different masses. After the collision, B moves in the negative direction of the y axis at speed v/6. In what direction does A move, as an angle with respect to the x axis?
Question: A runner weighs 635 N (about 140 lb), and 72% of this weight is water. (a) How many moles of water are in the runner's body?
Explain why the color temperatures of the sun in bright sunlight and in the shade are different, even though the sun did not change temperature. What are the physical causes of this difference, and
As you drive down the road at 15.6 m/s you press on the gas pedal and speed up with a uniform acceleration of 1.38 m/s2 for 0.656 s.
A rubber raft of mass 3M floats past a dock at 1 m/sec toward the east. A girl of mass 2M runs down the dock and jumps in the raft with a speed of 2 m/sec in the north direction. How much kinetic en
The ramp is 0.738 m high and 5.31 m long. When the sphere reaches the bottom of the ramp, what is its total kinetic energy? What is its rotational kinetic energy?
A cubical box of widths Lx = Ly = Lz = L = 4.82 nm contains eight electrons. What is the energy of the ground state of this system? Assume that the electrons do not interact with one another, and do
If the force between the spheres has a magnitude of 8.8×104 N, what is the distance between the spheres? What kind of force is this?
An electric dipole p of magnitude 25 p C • m makes an angle of 65º with a uniform electric field E of magnitude 3.0 x 10-6 N/C. What is the magnitude of the torque on the dipole?
A baseball traveling at 70 mph is hit back at the pitcher with a speed of 110 mph. If the ball remains in contact with the bat for 0.01 s, what is the average acceleration of the ball?
A long wire carrying a 5.5 A current perpendicular to the xy-plane intersects the x-axis at x=-2.0cm. At what point on the x-axis is the magnetic field zero if the two currents are in the same direct