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A soccer ball is kicked from the ground with an initial speed of 18.0 m/s at an upward angle of 46.3°. A player 53.2 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground?
Neglect air resistance.the second one A certain airplane has a speed of 337.4 km/h and is diving at an angle of θ = 33.0° below the horizontal when the pilot releases a radar decoy . The horizontal distance between the release point and the point where the decoy strikes the ground is d = 679 m. (b) How high was the release point?
How much does it cost to cook food in a 12,000 W oven for 47.6 minutes? Assume electricity costs 8.0 cents per kW·h
Describe the unique behavior of water (thermal expansion and specific heat capacity) that make it essential for life on Earth. 5-8 sentences
A car of mass 2800 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, compute the velocity of the stuck-together car and truck
A flat circular coil with 110 turns, a radius of 4.10 × 10-2 m, and a resistance of 0.500 ? is exposed to an external magnetic field that is directed perpendicular to the plane of the coil, Find the induced current in the coil
A long solenoid with 10.0 turns/cm and a radius of 7.00 cm carries a current of 20.0 mA. What is the magnitude of the magnetic field there
Calculate the verage speed and time lead by the runner using the definition of average speed.
The drawing shows six point charges arranged in a rectangle. The value of q is 9.0 uC, and the distance d is 0.13 m. Find the total electric potential at location P
A 2.54 kg particle moving along the x-axis experiences the force shown, where Fmax=6.85 N, Fmin=-6.85 N, d1=1.27 m, d2=2.54 m, d3=3.81 m, and d4=5.08 m. At x=0.00 m the particle's velocity is 3.93 m/s. What is its velocity at x=2.54 m?
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 192 N and is 3.1 m long. What is the tension in each rope
A 2,284-kg car is moving down a road with a slope (grade) of 13% at a constant speed of 11 m/s. What is the direction and magnitude of the frictional force
A parallel plate capacitor has plates each of area 100 cm^2, what is the average charge density on the positive plate?
Honeybees acquire a positive charge while flying through the air. The rapid motion of the wings through the air provides the "friction" to strip charges off the bee, find the strength of the electrostatic force on the pollen grain
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