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1. Air with a mass of 0.54kg initially at 20.0°C occupies a space of 0.45m^3 inside of a balloon.The gas is heated and expands at a constant pressure to occupy 1.0m^3
a. Calculate the temperature of the gas after it expands.
b. Calculate the heat added to the gas.
2. A cold room has metal and wooed chairs inside. Why do the metal chairs feel colder than the wooden chairs, even though both are at the same temperature?
Turtle's limousine service has determined that the number of kilometres each limousine travels each year is normally distributed with a mean of 100,000
A heat engine operates in a Carnot cycle between72.0°C and345°C. It absorbs21,600J of energy per cycle from the hot reservoir. How much energy does it expel in each cycle by heat
A ball thrown in the x-direction at 4.5m/s from a tower that is 20m tall. Calculate the speed of the ball when it hits the ground. Also, determine the distance the ball lands from the tower
A 100 arrow is shot perpendicularly from a bow whose effective spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does arrow rise.
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. find the time that was recorded on Earth
Two carts are put back to back on a track. cart A has a spring-loaded piston; cart B which has twice the inertial mass of cart A is entirely passive. when the piston is released, it pushed against cart B and the carts move apart. how do the magnit..
The first part of this week's assignment is to choose and research an airport of interest. This can be an airfield near you or an interesting place you always wanted to explore further. The important thing is that it should have some regular weather ..
a swimmer heads directly across a river swimming at 1.8 ms relative to the water. she arrives at a point 37 m
Derive Maxwell's Relations from First and Second Laws of Thermodynamics and Thermodynamic Functions like Internal Energy, Helmholtz's Function, Enthalpy and Gibbs Free Energy.
A 2.0-kg rock initially at rest loses 407 J of potential energy while falling to the ground. Compute the kinetic energy that the rock gains while falling. What is the rock’s speed just before it strikes the ground?
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. What is the power of one laser pulse
A narrow glass tube, open at one end, closed at the other, is 40cm long. Determine the frequency of the moving sound source
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