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(a) 50 g of gasoline are mixed with 38 g of water. What is the average density of the mixture?
kg/m3
(b) 52 cm3 of gasoline are mixed with 40 cm3 of water. What is the average density of the mixture?
_____________kg/m3
A gun is fired vertically into a 2.00 kg block of wood at rest straight above it. If the bullet has a mass of 21.0 g and a speed of 198 m/s, how high would the block rise into the air after the bullet becomes embedded in it.
Four identical masses of mass 710 kg each are placed at the corners of a square whose side lengths are 15.0 cm. What is the magnitude of net gravitational force on one of the masses, due to the other three.
A sphere of radius R has a charge Q. The electric field strength at a distance r > R is Ei. What is the ratio Ef/Ei of the final to first electric field strength if Q is halved.
A 15kg crate is moved along a horizontal floor by pulling on it with a rope that makes a 30 degree angle with the horizontal, How much work is done by the normal force and frictional force, What is the net work
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
Find out the difference in potential between the birds feet.
A 120-V motor has mechanical power output of 2.50 hp. It is 90.0% efficient in converting power that it takes in by electrical transmission into mechanical power, Find the current in the motor
A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other.
What is the percent change in momentum of a proton that accelerates from 0.42c to 0.91c?0
A model-train transformer plugs into 120-V ac, What voltage is present across the tracks
The electric field lines on the left have twice the separation of those on the right. If the magnitude of field at point-A is 60 V/m, what is the magnitude of the field at point-B.
A 0.300-kg mass, attached to the end of a 0.750-m string, is whirled around in a smooth level table. If the highest tension that the string can withstand is 250 N, after that what highest linear speed can the mass have if the string is not to brea..
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