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A man with a mass of 80 kg sits on a chair of mass 10 kg.
A) Find the weights of the man and the chair.
B) The chair exerts an upward force of 700 N on the man. What force does the floor exert on his feet?
C) What force does the chair exert on the chair?
A small 12.3g plastic ball is tied to a very light 26.6cm string that is attached to the vertical wall of a room. A uniform horizontal electric field exists in this room. Find the magnitude of the electric field in the room
Discover new angles with respect to the x-axis
When is there no work on an object. For example, a weightlifter picks up a weight, or a kid wearing skates pushes of a wall and moves in the opposite direction. Why is the force in each problem not doing work
an electron emitted by a heated cathode and accelerated through a potential difference of 2.0 kv enters a region with
The yellow light from a helium discharge tube has a wavelength of 587.5 nm. calculate the number of lines per centimeter on the grating
he beaker has a mass 15 grams when its empty the beaker plus the liquid has a mass of 38 grams. the liquid has a volume
Find out the magnitude of the impulse imparted to golf ball?
You have a small electromagnet that consumes 350 W from a residential circuit delivering 110 V at 60.0 Hz. What is the inductance of the electromagnet
An electron traveling north enters a region where the electric field is uniform and points west. The electron:
A rabbit runs in a straight line with a velocity of +1.4 m/s for a period of time, rests for 12 s, what is the total time rabbit spends running at 1.4 m/s
a camera lens with a focal length of 50mm and aperture of f1.4 is used to image a scene. the photographer focuses the
a cube is located with one corner situated at the origin of an x y z coordinate system. one of the cubes faces lies in
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