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Consider 4.0 moles of gas at STP. What volume do the 4.0 moles occupy if the temperature increases to 58 0C and the pressure decreases to a quarter of its initial value? 4.4e2 L is the answer, but I am not sure why.
A .025 nm photon is incident on an electron. It is scatteredat an angle of 140o. What is the Kinetic engergy of the recoiling electron
Suppose that 5gm of air is adiabatically compressed so as to raise its temperature from 20deg to 400 deg. How much work must be done on the air to compress it?
an electron in an oscilloscope tube is traveling horizontally with a speed of 4.4times106 ms . it passes through a
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
An object sits on a wheel 0.30 m from its axle. The wheel's rotational speed decreases from 4.0 rad/s to 2.0 rad/s in 5.0 s. determine the wheel's average rotational acceleration
A circular loop of radius 21 cm is located in the plane of the paper inside a homogeneous magnetic field of 0.3 T pointing into the paper. It is connected in series with a resistor of 127 W. The magnetic field is now increased at a constant rate b..
A factory worker pushes a 28.4 kg crate a distance of 4.9 m along a level floor at constant velocity by pushing downward at an angle of 32degrees below the horizontal. How much work is done on the crate by friction during this displacement
What is the focal length of an eyepiece lens that will provide an overall magnification of -115? Assume student's near-point distance is N = 25 cm. Express your answer using two significant figures.
a what would brewsters angle be for reflections off the surface of water when the light source is beneath the surface?b
A 85-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 cm in diameter
The coefficient of static friction between the m =2.90 kg crate and the 35.0°incline of the figure below is 0.320.What minimum force vector F must be applied to the crate perpendicular tothe incline to prevent the crate from sliding down the incline?
a stone thrown horizontally from a height of 6.32 m hits the ground at a distance of 13.90 m. calculate the initial
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