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A point source of light is submerged 2.8 mbelow the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the areailluminated is a circle. What is the maximum radius that this circle could have?
m
A golfer hits a ball from the origin with an initial speed of 30.0m/s at an angle of 50 degrees above the horizontal. what is the speed and direction of motion of the ball just before it lands
A 1.5 kg particle-like object moves in a plane with velocity components vx = 40 m/s and vy = 90 m/s as it passes through the point with (x, y) coordinates of (3.0, -4.0) m.
A very bouncy ball is dropped from a height of 2.37 m to an asphalt playground surface and the height of its 5th bounce is measured to be 1.69 m. Find the coefficient of restitution of the ball for a collision with asphalt.
a light wave has a 670 nm wavelength in air. its wavelength in a transparent solid is 416 nm. a what is the speed of
a ball is thrown upward from the ground with an initial speed of 25 ms at the same instant a ball is dropped from a
A river 24.0 m wide and 5.0 m deep drains a 3000.0 km2 land area in which the average precipitation is 48 cm/year. What is the average speed of the river
an electrically neutral thin square metal slab measuring 4.80 on a side is placed in a uniform external field that is
Besides the gravitational force, a 3.25-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.10 - 3.30) m, where the direction of is the upward vertical direction. find out ..
Two cars traveling in opposite directions collide head on and are brought to rest. estimate the change in entropy of the universe
Defined time necessary for one complete oscillation
a brick layer applies a force of 100 n to each of two handles of a wheelbarrow. its mass is 20kg and it is loaded with
What is the direction of the current - by changing the magnetic field - center of a conducting wire loop in a horizontal plane with the north end of the magnet toward the loop.
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