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Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth?
a portable cd player uses a current of 7.50 mA and has a resistance of 465, If the player uses 24-gauge wire (A= 0.20 mm2) with a length of 6.50 cm, what is the resistivity of the wire
assuming the average person has a mass of 68kg? Do not avoid the weight of the logs. Assume the specific gravity of wood is 0.6.
A certain piece of metal weighs 1.68 N in air and 0.82 N when submerged in water. What is the mass density of the metal (in g/cm3)
It was revealed that 120 people had only 1 admission, 81 had 2 admissions, 48 had 3 admissions, 18 had 4 admissions, 18 had 5 admissions, and 15 had 6 admissions or more admissions. Does the data support the mayor's claim? Show the calculations or..
An experiment measures the temperature of a 270 substance while steadily supplying heat to it. The results of the experiment show. What are (a) specific heat of the liquid phase and (b) the heat of vaporization.
Treating a lightning bolt as a long, thin wire, calculate the magnitude of the magnetic field produced by such a bolt of lightning at a distance of 71 m.
A particle with a charge 3.2 x 10^-19 C is moving at a speed of 5x10^7 m/s that makes an angle of 40 degrees with respect to a uniform magnetic field B, Determine the magnetic field strength B
Find out the magnitude of the force exerted by the right pillar while a 90.0 diver stands at the far end of the board.
A 70 kg man (rad=0.25m) standing on a 10-kg disc (rad=0.4m) with his arms extended (rad=0.9m) holding a 15-kg weight in each hand. What is the rotational inertia of man with weights.
Assuming the diver has inhaled a negligible amount of air from the tank, what is the temperature of the ocean water.
A textbook of mass 2.10kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.190m, What is the tension in the part of the cord attached to the book
A 80 kg person sits on a 4 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3 cm in diameter. Find the pressure in pascals exerted on the floor by each leg of the chair, assuming the weight is evenly distributed.
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