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Question: A boy of mass 40 kg wishes to play on pivoted seesaw with his dog of mass 15 kg. When the dog sits at 3 m from the pivot, where must the boy sit if the 6.5 me long board is to be balanced horizontally?
q1. two bicycle tires are set rolling with the equivalent initial speed of 5.0 ms along a long straight road and
Four equal point charges, Q, are fixed at the corners of a square of side b. (a) What istheir total electrostatic potential energy? (b) How much potential energy will a fifth charge, Q, have at the center of the square (relative to V=0 a r =∞)?
The displacement vectors 44.5 cm at 15.0° and 23.0 cm at 51.0° both start from the origin and form two sides of a parallelogram. Find the area of the parallelogram
A projectile is fired at v0 = 381.0 m/s at an angle of ? = 65.7o with respect to the horizontal, How far will the projectile travel in the horizontal direction, R
In 2000, NASA placed a satellite in orbit around an asteroid. Consider a spherical asteroid with a mass of 8.00×1015 and a radius of 8.10. What is the escape speed from the asteroid
The racket is a potential-energy barrier whose height is the energy of the slowest string-breaking ball. Suppose that a 100 g tennis ball traveling at 220mph is just sufficient to break the 2.0-mm-thick strings.
A)Determine the magnitude and direction of the electric field at a point 7.8 meters from this charge B) How far from this charge does the electric field have a magnitude of 2 N/C
A spherical steel shell with shell thickness 10 mm rolling down the ramp without slipping.assume that the density of aluminum.
A cubical Gaussian surface surrounds two charges, q1 = +3.3 × 10-12 C and q2 = -2.0 × 10-12 C. What is the electric flux passing through the surface
An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. Calculate the specific heat of the alloy
A u-tube with a cross-sectional area of 1.00 cm^2 is open to the atmosphere at both ends. WAter is poured into the tube until the water rises part way along the straight sides, What is the density of the oil
imagine that you spill a cup (250 g) hot water, initially at 75 C, onto the cold ground on a winter fay, Calculate the net change in the entropy of the universe due to this process, and comment on the result
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