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In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. In one instance, the radius of the circle is 0.678 m. At one point on this circle, the ball has an angular acceleration of 68.9 rad/s2 and an angular speed of 13.5 rad/s.
(a) Find the magnitude of the total acceleration (centripetal plus tangential) of the ball.
(b) Determine the angle of the total acceleration relative to the radial direction.
When the minimum angle of deviation of a light ray passing through an isosceles triangular prism is 36 degrees and its vertex angle is 40 degrees, The angle of refraction of the light ray in the prism, in degrees
A 4.9 cm tall object is placed 25 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright and 3.9 cm tall. Where is the image located? What is the focal length of the mirror?
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneous breaks into two alpha particles, what is the force between the two alpha particles when they are 7.00 x 10^-15 m apart
A U-shaped tube open to the air at both ends contains some mercury. Calculate the vertical distance h from the top of the mercury in the right-hand arm of the tube to the top of the water in the left-hand arm
q1. a small metal sphere carrying a net charge of -2.70 is held in a stationary position by insulating supports. a
A blimp is motoring at constant altitude. The airspeed indicator on the blimp shows that its speed relative to the air is 20km/h, what is the velocity (magnitude and direction) of the blimp relative to the ground
A drunk driver in a 1600 kg car plows into a 1500 kg parked car with its brake set. Police measurements show that the two cars skid together a distance of 19 m before stopping. If the effective coefficient of friction is 0.78, how fast was the dru..
A swimming pool has dimensions 26.0 m multiplied by 9.0 m and a flat bottom. what is the force caused by the water on the bottom
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. If an archaeologist finds an ancient firepit containing partially consumed firewood, what is the age of the ancient site
Some birthmarks can be removed by exposure to 585 nm laser light. Pulses are strongly absorbed by hemoglobin in the capillaries in the birthmark, What is the power of the laser pulse
Find out , the magnitude of the force each plate experiences due to the other plate as a function of , the potential drop across the capacitor.
A ball is thrown straight upward. At above its launch point, the ball's speed is one-half its launch speed. What maximum height above its launch point does the ball attain
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