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A tennis player receives a ball on his racket. The ball has a mass m = 57 g and it is approaching the racket at a speed v1 of 60 km/h. Suppose the player hits the ball back with a speed of v2 = 70 km/h. Assume that when the racket hits the ball, it is momentarily at rest, so assume that the speed of the racket is zero. Also, assume that the collision is elastic (No loss of energy).
a. Suppose that the contact last delta t -= 10-3 s. Compute the average force.
b. Compute the work done by force applied by the racket on the ball.
Electrons in a photoelectric effect experiment emerge from an aluminum surface with a max kinetic energy of 1.30 eV. What is the wavelength of the light
Write an Interface called Exam with a method Pass(int mark) that returns a Boolean. Write another Interface called Classify with a method Division(int average) which returns a string. Write a class called Result which implements both exam and Clas..
when 92.8 v is applied across a wire that is 9.8 m long and has a 0.32 mm radius the magnitude of the current density
An air-standard Diesel cycle has a compression ratio of 18.2. Air is at 27 ºC and100 kPa at the beginning of the compression process and at 1700 K at the end of theheat addition process. Using constant specific heats at room temperature, determine (a..
We compared two cases: single phase delivery (call the wasted power P1), and 2-phase delivery (P2), Find the ratio P1/P2 when load 1 = 3.1 A, load 2 = 7.4 A, and each delivery wire has a resistance of 0.25 ohm
The density of liquid water at the boiling point (100 degrees Celsius) is 958 kg m-3. By what factor does the volume of the water increase
A conducting sphere that carries a total charge of -9.1 µC is placed at the center of a conducting spherical shell that carries a total charge of +1.7 µC. The conductors are in electrostatic equilibrium. Determine the charge on the outer surface o..
A wire 6.10m long with diameter of 2.00mm has a resistance of 0.0280?. Find the resistivity of the material of the wire
A parallel-plate capacitor is formed from two 1.0 cm × 1.0 cm electrodes spaced 2.7 mm apart. The electric field strength inside the capacitor is 1.0×106 N/C What is the charge (in nC) on negative electrode? What is the charge (in nC) on positive ele..
An alpha particle is a nucleus of helium. It has twice the charge and four times the mass of the proton. When they were very far away from each other, but headed toward directly each other, a proton and an alpha particle each had an initial speed ..
question a cell with .25 m internal concentration is placed into pure water. what is the pressure difference across the
A rocket blasts off from rest and attains a speed of 50 m/s in 14 s. An astronaut has a mass of 61.3 kilogram. Find the astronaut apparent weight during takeoff
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