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A starship that was traveling at 0.7 c just returned from a 4-year voyage. If the time means 4.0 years of earth time, how much time elapsed on the ship? If the time means 4.0 years of ship time, how much time passed on earth?
An RLC circuit is connected to a 220 V 60 Hz ac voltage source. Determine the power loss in the circuit
An electron orbiting a hydrogen atom has an initial energy of -0.544 eV. The atom emits a photon, then absorbs a photon, ending up with an energy of -3.4 eV. What was the wavelength of the emitted photon?
What is a density of the block
A 9kg block is connected by a string over a light pulley to a 5kg block that is sliding over a flat table (i.e. the 9kg is pulling the 5kg off the table). If Co-efficient of kinetic friction is 0.200, find the tension in the string.
The escape speed from a distant planet is 43 km/s. If the acceleration of gravity on the planet surface is 11.0 m/s2, what is the radius of the planet
A solid sphere has a temperature of 628 K. The sphere is melted down and recast into a cube that has the same emissivity and emits the same radiant power as the sphere. What is the cube's temperature?
A net force of 7 newtons acts on an object that weighs 49 newtons. What is the resulting acceleration
Radiation of intensity 1.00 kW/m2 is incident on an area perpendicular to the incoming light. What is the resulting power per unit area now reaching the surface
An ideal gas is compressed from a volume of 400 cm^3 to a volume of 150 cm^3 slowly and isothermally in a piston-cylinder system. determine the heat transfer
A high diver of mass 80.0 kg jumps off a board 10.0 m above the water. what average upward force did the water exert on him
Discover minimum thickness of glass
A heart pacemaker fires 66 times a minute, each time a 29.0-nF capacitor is charged (by a battery in series with a resistor) to 0.632 of its full voltage
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