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Estimate the amount of energy that is wasted each day in Europe due to an additional inefficiency of 5% (on top of the thermodynamic efficiency) from cars that are not lubricated properly. You will have to make some assumptions about how many cars are poorly maintained, how far Europeans drive each day, and so on.
The deepest place in all the oceans is the Marianas Trench, where the depth is 10.9 km and the pressure is 1.10x10^8 Pa. by how much does its volume decrease
The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer. If the number of divisions on the circular scale is 50, calculate the least count of the micrometer. U..
Calculate the smallest amount of kinetic energy the electron must have in order to leave its circular orbit and move to infinity far from the proton
The angular speed of the rotor in a centrifuge increases from 423 to 1404 rad/s in a time of 5.20 s. Obtain the angle through which the rotor turns
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 115 bpm, How fast are you moving with respect to the Moon
Two test charges are located in the x-y plane. If q1 = -2.30 nC and is located at x = 0.00 m, y = 1.040 m and the second test charge has magnitude of q2 = 4.00 nC and is located at x = 1.20 m, y = 0.750 m, calculate the x and y components
A kid picks up a toy of mass 139g, from the floor. The kid lifts the toy 42.2cm above the floor. How much work does the kid do on the toy
The lens of an endoscope is carefully matched such that the light ray from the edge of the lens enters the fiber at an angle. What focal length should the lens have
An elementary particle called a pi meson (or pion for short) has an average lifetime of 2.6*10^-8 s when at rest. Find how far would the pion have traveled relative to Earth
A spring lies on a horizontal table, and the left end of the spring is attached to a wall. How far can the spring be stretched from its unstrained position
0.015mol of a diatomic gas, with initial temperature 18 degrees C , How much heat is added during this process
A velocity selector 1ms a magnetic field of magnitude 0.3 T perpendicular to an electric field of magnitude 0.32 MV/m. The mass of an electron is 9.11 times 10-31 kg. How much energy must electrons have order to pass through undeflected? Answer in un..
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