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The temperature of a body is increased from -173 C to 357 C. What is the ratio of energies emitted by the body per second in these two cases?
Consider a loop with 50 square turns that is 12 cm on a side and is in a uniform 0.6 T magnetic field. Find the current through a loop needed to create a maximum torque of 9.00 N · m
An unlikely weapon was once proposed which had all of the people in China to jump up and down simultaneously. Calculate what the speed of the Earth and the people would be after the collision
A gas in a cylinder with a piston that slides freely within is adiabatically expanded from 1.5 to 1.7 m3. by what amount did the internal energy of the gas change during this expansion
a steel oil pipeline spans a river gorge 100 m wide. the inside wall is electrically heated to reduce the viscosity of the oil to ease pumping, determine the heat lost per day for the pipe in calories
You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1.8x10^7m and its rotation period to be 22.3 hours, find the mass of the planet and star
question an air-traffic controller observes two aircraft on his radar screen. the first is at altitude 900 m horizontal
If both ropes BCA and CD can support a maximum tensile force = 160 , what is the maximum weight of the crate that the system can support? Illustrate what is the angle required for equilibrium
question1a 25mw jet engine produces a sound level of 120db threshold of pain at a distance of 100m from the engine
A drum rotates around its central axis at an angular velocity of 19.5 rad/s. If the drum then slows at a constant rate of 5.35 rad/s2, (a) how much time does it take and (b) through what angle does it rotate in coming to rest?
A large man sits on a 4-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg.what pressure does each leg exert on the floor
In the Bohr model, as it is known today, the electron is imagined to move in a circular orbit about a stationary proton. find what would be the corresponding orbital radius
A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.1 kg and the sign has a mass of ms = 16.6 kg. What is the net force the hinge exerts on the beam
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