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A gas is compressed from 600 cm3 to 200 cm3 at a constant pressure of 400 kPa. At the same time 100 J of heat energy is transferred out of the gas. What is the change in the thermal energy of the gas during this process?
A light bulb at point x in the frame of reference O blinks on and off at intervals, ?t = t2 - t1. Use the expressions for the Lorentz transformations to derive the expression for the time dilation relations ?t and ?t'
The log has a mass m= 984 kg; the truck has a mass M=8750 kg. Calculate the minimum coefficent of static friction u needed to keep the log in the back of the truck
A block of mass m1 on a smooth, horizontal surface is connected to a ball of mass m2 by a lightweight cord over a lightweight , frictionless pulley , Determine the normal force exerted by the table on the block
an artillery piece is aiming at a target on a cliffacross a river. the horizontal distance of the target from the gunis 300 meters, what is the maximum height reached by the shell fired from the gun
Assume a typical hummingbird has a lifespan of 4.00 years and an average heart rate of 1300 beats per minute. Compute the number of times a hummingbird's heart beats in its life, and express it in scientific notation. Make use of 365.24 days per y..
A constant force applied to object A causes it to accelerate at 6 m/s^2 .The same force applied to object B causes an acceleration of 3 m/s^2. Which object has the smallest mass
A 2.00 cm high object is placed 3.0 cm in front of a concave mirror. If the image is 6.0 cm high and virtual, what is the focal length of the mirror
Electromagnets that produce large magentic fields use water cooling to prevent excessive heating of the magnet's coils. How many liters of water must circulate by the coils each second if the temperature of the coils is not to exceed 49°C
Calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density thickness. Show your work & please be sure to compare.
a find the resistance that must be placed in series with a 10.0 galvanometer having a 125 acircmicroa sensitivity to
At what temperature is the root-mean-square speed of nitrogen molecules equal to the root-mean-square speed of hydrogen molecules at 15.0°C? (Hint: The molar mass of Hydrogen is 1.008g/mol and the molar mass of Nitrogen is 14.007 g/mol) of each eleme..
Which of the following must be true if we are to infer (calculate) a star's luminosity directly from the inverse square law for light.
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