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A spring whose stiffness is 1170 N/m has a relaxed length of 0.43 m. If the length of the spring changes from 0.29 m to 0.80 m, what is the change in the potential energy of the spring? ΔU = ___J
You "throw together" 37 protons, 48 neutrons, and 37 electrons, to make a hypothetical atom of mass 84.960840 amu. (Utilize my number; don't look up the atom in a table of isotopes.) What is its binding energy in MeV/nucleon?
ray of light comes to the interface that is part of a sphere of radius r=15.0 cm. Where does the refracted ray cross the principal axis if the incident ray is 5.0 cm away from the principal axis
An ice cube is dropped in a glass of oil (density= 900 kg/m^3). What fraction of the ice floats above the oil
An engineer wants to find the rotational inertia of an odd-shaped object of mass 9.0 kg about an axis through its center of mass. what is the rotational inertia of the odd-shaped object
question the equation for the spherical wave front of a light pulse that begins at the origin at time t0 is
A freezer is used to freeze 3.0 Lof water completely into ice. The water and the freezer remain at aconstant temperature of T = 0°C. Determine the change in the entropy of the water
A typical helium nucleus consists of two protons and two neutrons. What is the electric force between the nucleus and one of the electrons orbiting the nucleus
The attractive electrostatic force between the point charges 7.14×10?6 and has a magnitude of 0.825, find the sign and magnitude of the charge Q
A 12.8 g bulletis fired horizontally into a 93 g woodenblock initially at rest on a horizontal surface. evaluate the speed of the bullet immediately before impact
A child in a boat throws a 5.80-kg package out horizontally by a speed of 10.0 m/s. The mass of the child is 23.0kg and the mass of the boat is 35.0kg.
An inductor (L = 350 mH), a capacitor (C = 4.43 µF), and a resistor (R = 570 ) are connected in series. A 50.0 Hz AC generator produces a peak current of 250 mA in the circuit. Calculate the required peak voltage ?Vmax
a uniform line charge of linear charge density l 10.0 ncm extends from x 5 m to x 8 m. the magnitude of the electric
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