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A concave shaving mirror has a radius of curvature of +39.1 cm. It is positioned so that the (upright) image of a man's face is 3.30 times the size of the face. How far is the mirror from the face?
a meter stick is held vertically with one end on the floor and is then allowed to fall. find the speed of the other end
Explain why an air bubble increase in volume as it rises from the bottom of a lake to the surface.
The drawing shows four point charges. The value of q is3.3 μC, and the distance d is 0.80 m. Find the totalpotential at the location P. Assume that the potential of a point charge is zero at infinity.
By what height must a long jumper raise his centre of mass when making a jump of 9m, if his horizontal velocity on take-off is 8ms-1?
1. What is the magnitude of the acceleration of the two boxes? ________m/s2 2. What is the force exerted on mB by mA? In other words what is the magnitude of the contact force FC? _______N
A small object of mass 3.70 g and charge -18.1 µC is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. What are the magnitude and direction of the electric field
A small ball of mass 52g is suspended from a string of length 68 cm and whirled in a circle lying in the horizontal plane. Find the centripetal force experienced by the ball
an air column in a glass tube is open at one end and closed at the other by a movable piston. the air in the tube is
a person pulls a 10kg weight across a floor a distance x=2.0m by pulling on a rope with 50N directed 15 degrees above the horizontal. compute the work done by each one
The mass density of an object is 22.0 g/cc, and its mass is estimated to be 136 gram. Estimate what is the volume of the object
A non-conducting charged sheet and a non-conducting sphere (radius b) are arranged as shown in the figure. The right-most surface of the sheet is at x=0 and the center of the sphere is on the x-axis at x=xnaught. The sheet has a positive uniform char..
A particular vacuum flask has a mass of 1 kilogram and contains 1 liter of liquid water, how much energy did the heating element supply, You can disregard the energy needed to warm and vaporize the water
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