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Q. A skateboarder shoots off a ramp with a velocity of 6.80m/s, directed at an angle of 59° above the horizontal. The end of the ramp is 1.10 m above the ground. Let the x axis be parallel to the ground, +y direction be vertically upward, and take as an origin the point on the ground directly below the top of the ramp.
Q. A blacksmith heats a 1kg iron horseshoe to 470 degrees C then plunges it into a bucket containing 15 kg of water at 22 degrees C. What is the final temperature?
Two mirrors meet at a 127° angle. If light rays strike one mirror at 40° as shown, at what angle ? do they leave the second mirror.
find the volume of the irregularly shaped object. What is sigma_inner, the surface charge density (charge per unit area) on the inner surface of the conducting shell.
A violinist places her finger so that the vibrating section of a 1.20 g/m string has a length of 40.0 cm, then she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with the wavelength of 30.0 cm. What is the tensio..
What is the wavelength of radio waves. An electron in a TV is accelerated toward the screen across a potential difference of 54.2kV. How much kinetic energy does the electron gain while accelerating.
Two spherical conductors are connected by a long conducting wire and a total charge of 20.0 μC is placed on this combination. One sphere has a radius of 4.0 cm while the other has a radius of 6.0 cm. Explain the reasoning of the steps that allow you ..
In soccer, a speed record was set for kicking a soccer ball at 43m/s. If the soccer player kicked the ball from ground level at an angle of 30° from the horizontal, what would be the flight time of the soccer ball? Assume that air resistance is ne..
A 1.2µF capacitor is charged to a potential difference of 11.0V. The wires connecting the capacitor to the battery are next disconnected from the battery and connected across a second, initially uncharged, capacitor. The potential difference across t..
A paratrooper pilot fell 360 m after jumping without his parachute opening. He landed in a snow bank, creating a crater 1.50 m deep, but survived with only minor injuries. Assume the pilot's mass was 80 kg and his terminal velocity was 50 m/s.
A thin rod consists of two parts joined together. One third of it is silver and two-thirds is gold. The temperature decreases by 24C°.
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
A plane diving with constant speed at an angle of 51.7° with the vertical, releases a package at an altitude of 437 m. The package hits the ground 2.93 s after release. How far horizontally does the package travel.
A 4.5m long, non uniform beam weighing 750N, supported by two weighing cables, is at rest in horizonal position as shown . The cable on the right has a tension of T1=650 N.
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