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A point source of light is 86.3 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water. Water has an index of refraction of 1.33.
A starship is exploring a new star system. The ship is a light-minutes away from the star, which has a radius of 106km. The intensity at the location of the starship is 240 W/m^2.
A student sits on a rotating stool holding two 4 kg objects. When his arms are extended horizontally, the objects are 0.8 m from the axis of rotation, and he rotates with angular speed of 0.74 rad/sec. Calculate the final angular speed of the stude..
A baseball is bunted down the third-base line leaving the bat from a height of 0.800m with an initial velocity of 8.00m/s at an angle 30 degrees above the horizontal. What is the speed of the ball just before it hits the ground
Two kids of masses 45 kg and 30 kg sit on the opposite sides of a seesaw. The 45 kg kid sits in the left at a distance of 54 cm from a frictionless axle. determine The force that the axle must exert
q1. what is the minimum distance between two point that will permit them to be resolved at 100km using a terrestrial
A soap film whose index of re%uFB02ecetion is 1.33 is suspended in air. When sunlight strikes the film nearly perpendicularly, Find the thickness of the film
A camera's flash uses the energy stored in a 270 microF (uF) capacitor charged to 190 V. The current in the charging circuit is not to exceed 25 mA. What's the resistance in the charging circuit
Two balls of putty, each mass m, move in opposite directions toward each other with speeds of 0.95. What is the mass of this ball of putty
A small round solid object beta equals 3/4 of mass m and radius r is released from rest at height h on a circular loop track of radius R. The objects rolls without slipping and the radius of the object is much less
A water molecule, which is electrically neutral but has a dipole moment of magnitude p = 6.20·10-30 C m, is 3.20 cm away from a point charge q = +6.90 ?C, Calculate the magnitude of the net force
car is driving directly north on the freeway at a speed of 112 km/h, What is the velocity of the truck relative to the car
An ice cube sliding along the ground at 3 m/s goes off a ramp pointed straight up. What is the speed of the ice cube when it comes down, just before it hits the ground
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