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An iron casting containing a number of cavities weighs 5.70E+3 N in air and 3.74E+3 N in water. What is the total volume of all the cavities in the casting? The density of iron (that is, a sample with no cavities) is 7.87 g/cm3.
The acceleration of gravity on Mars is 37 m/s2. If anastronaut can jump upward 20cm on the earth's surface, how high could he jump on the surface of Mars
You have a concave spherical mirror with a 13.3-cm radius of curvature. You place an object on the mirror's axis, 19.7 cm in front of the mirror
A sphere with radius 0.185m has density p that decreases with distance r from the center of the sphere according to p=3250 kg/m^(3) - (8750 kg/m^(3))r. Find total mass of the sphere
A person pulls a 5.0 kg sled by a rope across a floor. The coeffecient of kinetic friction between the floor and the sled is 0.15. What is the horizontal acceleration of the sled
The photoelectric effect experiment is often carried out by using a mercury light source to illuminate a particular surface. What is the work function of this surface
What will be the equilibrium temperature when a 223 g block of copper at 258 C is placed in the 178 g aluminium calorimeter cup containing 874 g of water at 13.2 C.
A +20 nC point charge is placed on the x axis at x =2.0 m, What is the direction of the electric field at the origin
A square conducting loop has side a and carries clockwise current I as shown in the diagram. calculate the magnitude and direction of the magnetic field at the center of the square
A projectile is red from level ground at an angle of 30 degree above the horizon. It hits the ground at t = 4 s. What is the magnitude of the initial velocity, v?
As a result of the distribution illustrate what is scotts basis in the a/r and land, and explain how much gain or loss does he recognize?
An 9.00-cm-diameter, 390g sphere is released from rest at the top of a 1.50-m-long, 15.0 degree incline. find the sphere's angular velocity at the bottom of the incline
A water collector on a farm roof 5m high from the ground overflows with rain through a large circular are of radius 1.2m. The water then falls through a pipe and into a tub near the ground; it exits the pipe through a .3m radius spout located .5m fro..
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