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Consider a tennis ball cannon people use to practice their game:
a) estimate the velocity of the ball shot out of these cannons in meters/sec
b) estimate the weight of the tennis ball in kilograms(1kg= 2.2 pounds)
c) what is the approximate wavelength of these tennis balls?
d) why wouldn't a Scanning Tennis Ball Microscope be a good idea ( except for the obvious amusement value)
a?1000 kg aircraft going?25 ms collides with a?1500 kg aircraft that is parked. they stick together after the collision
A sled with mass 7.80 moves in a straight line on a frictionless horizontal surface. find the force acting on the sled
A person with a weight of 237 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
When light strikes the surface between two materials from above, the Brewster angle is 61.0°. What is the Brewster angle when the light encounters the same surface from below
An insulated Thermos contains 110cm3 of hot coffee at 90 °C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Care for the coffee as thoug..
A transformer is to be used to provide power for a computer disk drive that needs 5.8 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
A student yells across a street at a concrete wall. The student hears an echo 0.500 seconds later. If the speed of sound in air is 343 m/s, what is distance from the student to the wall only.
A small ball is attached to one end of a spring that has an unstrained length of 0.204 m. The spring is held by the other end, What is the maximum acceleration of the eardrum
Consider the glass prism in the figure below, for which ? = 22° and ? = 68°. What is the smallest angle ?1 for which a laser beam will undergo total internal reflection
In an instant given two cars are moving in opposite directions and they are separate a distance of 300km. Determine the distance in Km that each car travel in that time
A 8.80-g bullet has a speed of 1.17 km/s. What is the bullet's kinetic energy if its speed is halved
find the mass defect (in u) for (a) helium-3 (2He3), which has an atomic mass of 3.016 030 u, and (b) the isotope of hydrogen known as tritium (1T3), which has an atomic mass of 3.016 050 u.
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