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Professional baseball pitchers can deliver a pitch which can reach the blazing speed of 100 mph (miles per hour). A local team has drafted an up-and-coming left handed pitcher who can consistently throw at 91.50 mph. Assuming the ball has a mass 143.0 g and has this speed just before a batter would make contact,
how much kinetic energy does the ball have?
Kball = _______________ J
How high would the ball need to be dropped from to attain the same energy (neglect air resistance)? (The acceleration due to gravity is 9.81 m/s2.)
hball = ______________ m
Suppose a disk of radius R and mass M starts from rest at a height of 2.5m, What is the linear speed of the disk when it leaves the incline
a wire lying in the plane of the page carries a current directed toward the bottom of the page. What path will the electron follow
A test tube standing vertically in a test tube rack contains 2.2 cm of oil, What is the gauge pressure on the bottom of the tube
A defensive lineman of mass M = 115 kg makes a flying tackle at vi \= 4.00 m/s on a stationary quarterback of mass m = 76 kg, calculate the shear stress exerted on the bone in the collision.
A motorcyclist is able to ride on the vertical wall of a bowl- shaped track . his weight is counteracted by the friction of the wall on the tires. what force increase or decrease if he rides faster.
a helium tank holds 0.62m^3 of heliumat a pressure of 910 kPa. What volume would the helium occupy
Light from a heliom-neon laser (wavelength 632.8 nm) diffracts when incident on a hair of thickness 0.040 mm. What is the angular width of the central diffraction maximum
A cannon ball (m=.7 kg) traveling at 200m/s hits and is impeded into a 400 kg car. If the car was initially at rest, what will be its velocity after the impact
Suppose a tank contains 577 m3 of neon (Ne) at an absolute pressure of 1.01×105 Pa. What is the increase in the internal energy of the neon
4 lbm of water is in a volume of 10.0 ft3 at 60 psi. The water undergoes an isobaric change of state until the temperature is 500°F. Find the temperature at the initial state
The electric field everywhere on the surface of a charged sphere of radius 0.470 m has a magnitude of 865 N/C, find distribution of charge inside the sphere
In daily life we see many cases of people who are caught misrepresenting things and who soon after that are excused and accepted by their contemporaries. How is this different in science.
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