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a solid wood door 90 cm wide by 2.00 m tall has a mass of 35.0 kg. it is ajar and at rest. a ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. the ball rebounds with a speed of 16.0 m/s along the same line. how much energy is lost in the process?
A 50 g ball is fired horizontally with initial speed v_0 toward a 110g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110g ball swings out to a maximum angle the..
questiona professional race-car driver buys a car which can accelerate at 89.0 ms2. the racer decides to race beside
The magnetic flux through a coil of wire containing two loops changes from -41 Wb to +16 Wb on 0.35 s, What is the emf induced in the coil
Two charged dust particles exert a force of 8.5 x10-2 N on each other. What will be the force if they are moved so they are only one-seventh as far apart.
A small bag of sand is suspended by a wire of length L=1.2 m. A bullet of mass m=8 gr, moving with speed v0=600 m/s in the horizontal direction, What is the mass of the bag
How many 104 W lightbulbs can you use in a 102 V circuit without tripping a 17 A circuit breaker? (The bulbs are connected in parallel that means that the potential difference across each lightbulb is 102 V.)
A picture window has dimensions of 1.40 m×2.50m and is made of glass 5.50mm thick. At what rate is heat being lost through the window by conduction
What is the coefficient of static friction among the coin and the turntable? Express your answer using two significant figures.
A metallic sphere has a charge of +4.2 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 9.8 109 electrons are transferred. What are the charges of the sphere and the rod now?
When one person was talking in a small room, sound intensity level was 60dB everywhere within the room. Then, there were 14 people talking in similar manner at the same time in the room, what was the resulting sound intensity level.
A certain fluid has a density of 1080 kg/m3 and is observed to rise to a height of 1.8 cm in a 1.0-mm-diameter tube. Calculate the surface tension of the fluid
A bucket of water with a mass of 6.0 kg is attached to a rope that is wound around a cylinder. What is the acceleration of the bucket
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