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At the Science Olympiad competition, a group of middle school students uses a trebuchet that launches a tennis ball from a height h above the ground with a speed of 11.33 m/s and initial angle of 36.73° with respect to the horizontal. The tennis ball covers a horizontal distance of 14.014 m before it hits the ground. At what height h above the ground was the tennis ball launched?
An empty capacitor is capable of storing 1.0 × 10-4 J of energy when connected to a certain battery. If the distance between the plates is halved and then filled with a dielectric, how much energy could this modified capacitor store when connected..
David is driving a steady 21.0m/s when he passes Tina, who is sitting in her car at rest. How far does Tina drive before passing David
An 75.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 30.0° to the ground. What is the direction of the contact force
Light of a wavelength of 661.1 nm is received from a star that is emitting light of wavelength of 659.6 nm. How fast is the star moving relative to the earth
A grating has 600 rulings per mm and is 6.0 mm wide. What is the smallest wavelenght interval that can be resolved in the third order at ? = 500 nm? How many orders can be seen? Assum normal incidence of light on the grting throughout.
he string will break if its tension exceeds 60.0 N . The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Determine the maximum speed the stone can attain without breaking the string.
What is the total force and the absolute pressure on the bottom of a swimming pool 22m by 8.5 m whose uniform depth is 2 m
Two particles rest at a distance d apart on the edge of a table. One of the particles of mass m, falls off the edge and falls vertically. Using the other particle (still at rest) as the origin, (a) calculate the torque ? on m as a function of time..
Ice of mass 52.0 g at -10.6° C is added to 188 g of water at 14.5° C in a 102 g glass container of specific heat 0.200 cal/g-°C at an initial temperature of 23.3° C
A 1-microF capacitor, a 10-Ohm resistor and a 1 microH inductor are connected in series with a sinusoidal signal generator of 10V peak voltage amplitude operating at a frequency ? of 100 rad/s. Find the amplitude of current oscillations in the circ..
A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from 0 to 5.80 m/s, What is the magnitude of the linear impulse experienced by a 74.0-kg passenger in the car during the time the car acceler..
Fred and Barney are two electric charges that are to begin with held 1 meter apart and experience an electric repulsion of 10 pounds of force. What would be the force of repulsion between them be if the two were moved closer together so that they ..
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