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A compound microscope has objective and eyepiece focal lengths of 6.1mm and 1.9 cm , respectively.
If the lenses are 8.0cm apart, what is the magnification of the instrument?
find coefficient of kinetic friction between m1 and shelf.
Define potential difference. What is the difference between electric potential and electric potential energy? What is the unit for potential difference
a student measures the diameter of a small cylindrical object and gets the following readings 4.32, 4.35, 4.31, 4.36, 4.37, and 4.34cm. What is the average diameter of these readings
The sun produces its power from the conversion of mass into energy by Einstein's equation E=mc2 where c=3x10^8 mls. the sun's intensity on the earth is 1346W/m^2, find the rate at which mass is being converted to energy in the sun
A 28.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block
A 60-kg basketball is dropped out of a window that is 6.1m above the ground. The ball is caught by a person whose h&s are 1.5m above the ground. Find gravitational potential energy of the ball.
In a certain region of space, the electric field, E, is constant in direction (say horizontally in the +x-direction), but its magnitude decreases.
A person can be killed if a current as small as 50 mA passes near the heart. An electrician is working on a humid day with hands damp from perspiration. What potential difference between the two wires
In a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles, What is the magnitude of Betty's force
What is the relationship between the light emitted by an atom and the energies of the electrons in the atom?
What is effectiveness of battery as an energy storage device
a marble column of cross-sectional area 1.2 m^2 supports a mass of 25,000 kg. what is the stress within the column
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