Mechanics | Relativity Answers

the density of gold is 19.3 g/ml that of lead is 11.4g/ml that of iron 7.8g/ml, and that of aluminun 2.7 g/ml . a student is given separate samples of three substance A,B, and C along with a graduated cylinder containg 50.0 ml ..of water, Each sample has a mass of 200.0g and the student finds that the volumes of the samples are A , 25.64ml B, 10.36 and C 17.54ml ,what is the identity of each substance

gold has a density of 19.3g/ml .suppose you have 100.0 glonkins of gold., what volume in liters will the gold occupy

An automobile tire is rated to last 35,000 miles. Estimate the number of revolutions the tire will make in its lifetime?

A block of wood floats in water with 4/5th of its volume submerged, but it just floats in other liquid. density of liquid is:?
and: 800

fluids: A body of density D is dropped from rest from a height h into a lake of density d (d>D). Neglecting all dissipativ forces, the maxm depth to which the body sinks before returning to float on surface is:? (ans: hD/d-D)

doubt bout fluids: A boat carryinga number of stones is floating in a water tank. If the stones are unloaded into water, then water level will:
FAll
Rise
Remain unchanged
Depends on no. of stones

A force of 315N is applied horizontally to a crate in order to displace the crate 35.0m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 14 percent of the crate's initial internal energy. Calculate the initial internal energy of the crate. (disregard the work done on the floor, assume that all work goes into the crate)

if radius of the earth (assuming perfect sphere)is decreased keeping its mass constant ,effective value of g will increase at poles while may increase or decrease at equator.WHY??

A water wave travels at a speed of 135 m/s, If the frequency of wave is 45 Hz what is the wavelength?

if (p+a/v2) (V-b)= RT find the dimension of a/b