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A Ping-Pong ball with mass 1.5 g is attached by a thread to the bottom of a beaker. When the beaker is %uFB01lled with water so that the ball is totally submerged, the tension in the thread is 0.029 N. Determine the diameter of the ball. The density of water is 1000 kg/m3 and the acceleration of gravity is 9.81 m/s^2.
What kind of mirror must be used and what must its radius of curvature be?
A chartered airplane flies 100 km east, then 350 km northwest, and then 150 km at 30° west of south. Find the magnitude of the last leg of the journey
A heat pump has a coefficient of performance of 3.85 and operates with a power consumption of 7.14 103 W. How much energy does it extract from the outside air
A 2.0{\rm mm} -diameter ball bearing has 3.0×109 excess electrons. What is the ball bearing's potential
A proton accelerates from rest in a uniform electric field of 524 N/C. At some later time, its speed is 2.36 × 106 m/s. What is its kinetic energy at the later time
A shell is fired wit ha horizontal velocity in the poxitive x direction from the top of an 80m hight cliff. Determine the initial speed of the shell
What is the magnitude of the apparent weight of an 80-kg astronaut 5200-km from the center of the Earth's Moon in a space vehicle moving at constant velocity.
One of the new events in the 2002 Winter Olympics was the sport of skeleton (see photo), In the absence of nonconservative forces, such as friction and air resistance, what would be the speed of a rider at the bottom of the track
The ultrasonic transducer used in medical ultrasoundimaging, is a very thin disk ( m =0.10g) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil.
As a rocket passes the earth at 0.75c, it fires a laser perpendicular to its direction of travel, What is the speed of the laser beam relative to the earth
Evaluate the magnitude of the apparent weight of a 84 kg astronaut 4500 km from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 3.1 m/s^2?
At a distance of 4.32m from a siren, the sound intensity is 3.75 x 10-2 W/m2. Assume that the siren radiates sound uniformly in all directions; find out the total power radiated.
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