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A baseball player friend of yours wants to determine his pitching speed. You have him stand on a ledge and throw the ballhorizontally from an elevation 7.00 m above the ground. The ball lands 30.0 m away.A. What is his pitching speed?B. As you think about it,you’re not sure he threw the ball exactly horizontally. Asyou watch him throw, the pitches seem to vary from 5° below horizontal to 5° above horizontal. What is the range of speeds with which the ball might have left his hand? Enter the minimum and the maximum speed of the ball.
Gas is contained in a 9.00-L vessel at a temperature of 24.0°C and a pressure of 6.00 atm. How many molecules are in the vessel
As measured in Earth's frame of reference, two planets are 4.25×10^5 km apart. How fast is the ship traveling
An aircraft weighing 819 N is accelerated at 11.7 m/s2 for 5 seconds, at which time the aircraft launches. What is the force required to launch the aircraft
An electron is moving east in a uniform electric field of 1.53N/C directed to the west. What is the speed of the proton at point B
Two cars a and b are travelling in the equal direction with velocities A and B(A>B). While the car a is at a distance behind car b, the drive of car a applies break producing uniform retardation r, there will b no collision while.
A football coach in hopes of improving his kicker's performance fills a football with helium rather than air. what change in relative weight of the football
A child and sled with a combined mass of 55.20 kg slide down a frictionless hill that is 7.84 m high at an angle of 26o from horizontal. The acceleration of gravity is 9.80 m/s2. If the sled starts from rest, what is its speed at the bottom of hil..
The motion detector used in a physics lab sends and receives 49.55 kHz ultrasonic pulses. find the wavelength of the waves emitted by the motion detector
A parallel plate capacitor has circular plates of diameter 12 cm. The plates are separated by 3 cm, what is the value of the electric field between the plates
Determine the Intelligence frequency, carrier frequency, Modulation index, Carrier power, total power in FM signal and power in each sideband.
Are there transitions of higher or lower energy that are not seen? How many total transitions are there for hydrogen
A frictional force of 320 N acts on the rim of a 1.4 m diameter wheel to oppose its rotational motion. What is the torque about the wheel's central axis
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