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To work out the gravitational potential energy of an object the equation is:GPE = m x g x hWhere:m = the mass of the object (kg)g = gravitational field strength (on earth that is 9.81 ms-2)h = height of object (h)
A 2350-kg granite tombstone absorbs 2.8 x 107 J of energy from the Sun to change its temperature from 5.0°C at night to 20.0°C during an autumn day.
A surveyor is using a magnetic compass 7.1 m below a power line in which there is a steady current of 120A. What is the magnetic field in microteslas at the site of the compass due
Capacity
example of like paralle forces
Very thin glass sheets are used to form these capacitors. The sheets are interleaved with aluminium foil and fused together to forms a solid block. These capacitors are smaller in
Two moles of an ideal gas expands reversibly and isothermally to ten times its volume at 25°C. Evaluate the change in entropy during the process. ( R = 8.314 JK -1 mol -1 )
yes.fricton is working always opposite to the motion
AVERAGE VELOCITY: The ratio of the total displacement to the total time taken by the body is known as average velocity and represented by V ?av.
Q. Cue Ball Slip Problems? A cue ball is struck beside a line through its centre and parallel to the table. It moves forward primarily with zero angular rotation, sliding acros
Explain the meaning of Lasers? Lasers use these discrete energy levels in atoms or molecules to build a large population of atoms at an excited energy level that are ready and
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