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A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 58° with the normal to the wall. Each molecule in the beam has a speed of 1.5 km/s and a mass of 3.3 x 10-24 g. The beam strikes the wall over an area of 3.8 cm2, at the rate of 1021 molecules per second. What is the beam's pressure on the wall?
A 0.22kg arrow with a velocity of 15.00 m/s to the west strikes and pierces the center of a 3.00 kg target. What is the final velocity of combined mass? Answer in m/s.
A steel piano wire 1.35 m long has a cross- sectional area of 0.00751 cm2. When under a tension of 68.9 N, how much does it stretch
A spring has a spring constant = 40 N/m. It is compressed by a distance 10 cm. calculate Distance along the track to which the cart travels
A heat engine does 798.57 J of work per cycle while exhausting 163.83 J of waste heat. What is the engine's thermal efficiency in percent
Find the x and y components of vector v = (8.0 cm/s, -x direction) (answer should be in cm/s), Find the x and y components of vector d = (4.0 km, 33 degress left of the + y axis)
From rest, a 26.7 kg child is sliding down a 5.12 meter long playground slide in a time of 1.98 seconds. Calculate the value of kinetic friction
A 120 g trick baseball is thrown at 51 km/h. It explodes in flight into two pieces, with a 50 g piece regular straight ahead at 86 km/h. How much energy do the pieces gain in the explosion.
Explain how much force must you exert to keep the pole motionless and horizontal?
Superman meets an asteroid in outer space and hurls it at 90m/s. The asteroid is five hundred times more massive than Superman is. In the strip, Superman is seen at rest after throw. Taking physics into account, what would be his recoil speed.
A magnetic B field with strength 1 T passes through a metal square loop measuring 0.8 m on its side. If the B field is parallel to the loop's normal
A planoconcave lens (n = 1.52) has a focal length of -24.6cm. What is the radius of the concave surface
As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and the cloud to be the other plate, What is the capacitance of the system
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