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In a 30.0-s interval, 450 hailstones strike a glass window of area 0.600 m2 at an angle of 45.0° to the window surface. Each hailstone has a mass of 5.00 g and a speed of 7.80 m/s. Assume the collisions are elastic.
(a) Find the average force on the window.
N
(b) Find the average pressure on the window during this interval.
Pa
On a warm day (89F), an air-filled balloon occupies a volume of 0.250m^3 and has a pressure of 22.0 lb/in . If the balloon is cooled to 32F in a refrigerator while its pressure is reduced to 14.7 lb/in , what is the volume of the air in the container..
A 2.00 meter long horizontal plank whose mass is 3.00 kg is placed so that the very end (the right end) rests on a retaining wall. The left end is put on the tailgate of the truck. However the tailgate is tilted a bit, so it only contacts the boar..
Can you please help me? In reaching her destination a backpacker walks with an average velocity of 1.37m/s due west. how far did she walk
A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.75 km/hr. The child is 0.560 km from shore and 0.750 km upstream of a boat landing when a rescue boat sets out. If the boat proceeds at its maximu..
A 2.50 x 10^-6 F capacitor is charged to 754V and a 6.80 x 10^-6 F capacitor is charged to 563V, Determine the potential difference across the second capacitor
A player bounces a 0.45 kg soccer ball off her head, changing the velocity of the ball from vector v i = (8.6 m/s)x + (-2.1 m/s)y to vector v f =(5.8 m/s)x + (3.4 m/s)y hat. What is the magnitude of the impulse delivered to the ball
A force vector has a magnitude of 590 newtons and points at an angle 44o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
A bullet shot straight up into the air returns to it's starting point in 10 seconds. What is the initial speed of the bullet
What is the angular velocity in rad/s . What is the least pressure obtained inside the bottle? What will happen when this pressure is reached.
A high-voltage transmission line with a resistance of 0.255 ?/km carries a current of 1.40 kA. The line is at a potential of 600 kV at the power station and carries the current to a city located 157 km from the power station. What is the power los..
A 1.5-H inductor is connected in series with a 200-? resistor through a 15-V dc power supply and a switch. what is the maximum energy stored in the inductor
An infinitely long line of charge has a linear charge density of 4.50×10?12C/m . A proton is at distance 12.0 cm from the line and is moving directly toward the line with speed 1400 m/s. How close does the proton get to the line of charge? (m)
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