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A large, hot pizza 80 cm in diameter and 2.0 cm thick, with a temperature of 120°C, floats in outer space. Assume its emissivity is 0.8. What is the order of magnitude of its rate of energy loss?
High power lasers are used to cpmpress a plasma (a gas ofcharged particles) by radiation pressure. Find the pressure exerted on the plasma if the plasma reflects all the light beamsdirectly back along their paths
An object is being pushed up an inclined plane with a constant force F = 100. N. The plane makes an angle of 30.0° with respect to the horizontal, What is the mass of the object
An alpha particle, which is a helium nucleus, has a mass of 6.64*10^-27 kg. It is travleing horizontally at 42.3 km/s when it enters a uniform, What is the diameter of the path followed by the alpha particle
A small moon of a giant planet has an orbital period of 1.77 days and an orbital radius of 4.63 105 km. From these data, determine the mass of the planet
two boxes connected by a light horizontal rope are on a horizontal surface. the coefficient of kinetic friction between
A mass of 0.32 kg, attached to a spring with a spring constant of 73.0 N/m, is set into simple harmonic motion. What is the magnitude of the acceleration of the mass
Sketch and describe a floe control loop.
A 2.0 kg ball swings in a vertical circle on the end of an 80cm long string. Calculate the speed, magnitude and direction of acceleration
With what speed must a ball be thrown vertically from ground level to rise to a maximum height of 36 m
A flat uniform circular disk (radius = 5.00 m, mass = 390 kg) isinitially stationary. Find the resulting angular speed(in rad/s) of the disk
A molecule of DNA (deoxyribonucleic acid) is 2.05 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.88% upon becoming charged. Determine th..
A satellite is placed in orbit 8.40 x 10^5 m above the surface of the planet Jupiter. Find the orbital speed of the satellite
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