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To prevent damage to floors (and to increase friction), a crutch will often have a rubber tip attached to its end.If the end of the crutch is a circle of radius 1.1cm without the tip, and the tip is a circle of radius 2.6cm , by what factor does the tip reduce the pressure exerted by the crutch?
A pendulum with a mass of 1kg. on a light string 1 meter long is dropped from a position with the string held level falling until it as its lowest point. What is the velocity of the bullet
The work function for iron is 4.50 eV. Find the cutoff wavelength for iron and What is the lowest frequency of light incident on iron that releases photoelectrons from its surface
A bullet with mass 12.5 g and speed 94.9 m/s is fired into a wooden block with a mass of 113 g which is initially at rest on a horizontal surface. What is the speed of the block-bullet system immediately after collision
A rocket blast off and moves strait upward from the launch pad with a constant acceleration. What are the magnitude and direction of the rockets acceleration
A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, what is the initial horizontal position of the football
Two points are located on a rigid wheel that is rotating with an increasing velocity about fixed axis. The axis is perpendicular to the wheel at its center. Point 1 is located on the rim and point 2 is halfway between rim and axis .at any given insta..
A thin film of glass (n = 1.48) floats on a liquid of n = 1.35 and is illuminated by light of ? = 600 nm incident from air above it. Find the minimum thickness of the glass
What is the true potential difference among this resistor when the meter is not present? I thought this was just 25 but it is wrong when I enter in.
A charge of 50 mC is placed on the y axis at y = 3.0 cm and a 77-mC charge is placed on the x axis at x = 4.0 cm. If both charges are held fixed, what is the magnitude of the initial acceleration of an electron released from rest at the origin?
A small, 2.00-mm-diameter circular loop with R = 1.40×10?2? is at the center of a large 110-mm-diameter circular loop. What is the induced current in the inner loop
Two capacitors (C1 = 7.9 uF, C2 = 15.7 uF) are charged individually to (V1 = 15.7 V, V2 = 4.5 V). Calculate the final potential difference across the plates of the capacitors once they are connected
A student decides to spend spring break by driving 50miles dues east, then 50miles 30degrees south of east, How far will he drive, and how many vectors must he sum to calculate his displacement
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