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During a game of football, the ball is kicked by the punter with a speed of 20m/s at an angle of 40 degrees above the horizontal. A player on the other team, standing 50m away, starts running to catch the ball immediately after it is kicked. ASsuming he runs at constant speed, how fast must he go in order to catch the ball?
A wrecking yard inventor wants to pick up cars by charging a 0.400 m diameter ball and inducing an equal and opposite charge on the car. If a car has a 1000 kg mass and the ball is to be able to lift it from a distance of 1.00 m: (a) What minimum ..
A Ferris wheel has a radius of 5.0 m and makes one revolution in 8.0 seconds. A person weighing 670 N is sitting on one of the benches attached at the rim of the wheel. what is the apparent weight of the person
A typical red blood cell subtends an angle of only 1.8×10^-5 rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
A closed ended manometer is used to measure the pressure in a tank of gas. The working fluid for the manometer has a specific gravity of 1.47. what is the gauge pressure (in Pa) in the tank
solid disk of radius 4.05 cm and angular velocity of 81.32 rad/s about an axis through its center perpendicular to its plane. How far (in cm) will the disk travel until it stops skidding
At a certain location, the Earth's magnetic field has a magnitude of 6.2×10?5T, Find the magnitude of the magnetic flux through the top of a desk at this location that measures 130cm by 72cm
A proton (+1.6 x 10^-19 C) is traveling horizontally at 5.4 x 10^6 m/s south. What is the force of the proton along with direction
Two charged particles, Q1 = +4.90 nC and Q2 = -2.80 nC, are separated by 36.0 cm. What is the electrical potential energy of the pair
each second 5e23 nitrogen molecules (m=4.65e23 g) collide with a 10cm2 wall assume that the molecules all travel with a common speed of 290m/s, What is the pressure on the wall
A meter stick with a mass of 0.159kg is pivoted about one end so it can rotate without friction about a horizontal axis. Calculate the angular speed of the stick
Three identical capacitors are connected in series to give an equivalent capacitance CS, What is the ratio of CS/CP
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 96 m long, How fast is Maria moving relative to you
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