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A 10cm x 10 cm x 10cm block of steel (steel = 7900 kg/m3) is suspended from a spring scale. The scale is in Newton’s.
1) What is the scale reading if the block is in air?
2) What is the scale reading after the block has been lowered into a beaker of water and is totally submerged?
After 6.00 kg of water at 77.3 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. find the change in entropy that occurs
The speed of a bobsled is increasing because it has an acceleration of 2.4 m/s2. At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 450 N. The mass of the bobsled and its riders is 245..
q1. a basketball player achieves a hang time of .658 s in dunking the ball. what vertical height will he attain? the
Two tiny, spherical water drops, with identical charges of -7.20 x 10-17 C, have a center-to-center separation of 1.4 centimeter. Find the magnitude of the electrostatic force acting between them
A 1.0 gram balloon is filled with helium gas until it becomes a 20 centimeter diameter sphere. Determine what maximum mass can be tied to the balloon
A cigarette lighter in a car is a resistor that, when activated, is connected across the 12-V battery. Find the current that the battery delivers to the lighter
Adult cheetahs, the fastest of the great cats, have a mass of about 7 kg and have been clocked at up to 70 mph 31m/s. By what factor would its kinetic energy change if its speed were doubled
Large meteors can impact the earth with speeds of 80,000 km/h. If such a meteor were to impact at a point on the plane of Earth's equator, calculate the mass of the meteor
A solid uniform disk of mass M = 8.8 kg and radius R = 21 cm rests with its flat surface on a frictionless table (i.e., the axis of the cylinder is perpendicular to the table.) The diagram shows a top view. A string is wrapped around the rim of th..
a u.s. 20 gold piece has a mass of 33.44 grams and displaces 1.935 cm3 of water. if the coin is known to consist of
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might be 1.80e28 kg and 1.60e3 m. Find the density of such a star
A Carnot engine whose high-temperature reservoir is at 680K takes in 570J of heat at this temperature in each cycle and gives up 350J to the low-temperature reservoir. What is the temperature of the low-temperature reservoir
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