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A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 70.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction they are facing) with a speed of 13.0 m/s relative to the ground and we ignore friction, determine the recoil speed of the person and the skateboard.
A 35.1 kg girl and a 58.4 kg boy are on the surface of a frozen lake, 14.5 m apart. Calculate the magnitude of the girl's acceleration
The energy for the 5s valence electron in rubidium (Z=37) has energy ?4.18 electron volts. What is the effective nuclear charge Zeff experienced
As the crate is sliding down the ramp, you find out the washer is at rest with respect to the crate when the string makes an angle of 73 with the top of the crate.
A crate of mass 10.6 kg is pulled up a rough incline with an initial speed of 1.52 m/s. What is the change in kinetic energy of the crate
Three balls A, B, and C, with masses of 2.7 kg, 1.1 kg, and 1.2 kg, respectively, are connected by massless rods, find the acceleration of the center of mass of the three-ball system
Plutonium decays radioactively by emitting an alpha particle from its nucleus, If the alpha particle comes from the surface of the Plutonium nucleus, what is its greatest acceleration
A block of wood has a density of 0.55g/cm^3 and mass of 2,500 g. it floats in a container of oil (the oil%u2019s density is 0.85 g/cm^3). What volume of oil does the wood displace
A softball pitcher throws a ball straight upward as hard as she can. According to your stopwatch, What is the maximum height reached by the ball
A 2.3A current is flowing in a 25H inductor. A switch is opened, interrupting the current in 1.0ms. Find the induced emf in the inductor
A bird flies 25.0 m in the direction 55° east of south to its nest. What are the northward and westward components of the resultant displacement of the bird
If a electron after being accelerated by a potential difference of 100 V enters in a uniform magnetc field of 1T perpendicular. Calculate its radius of circular path described by it
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. How far will the projectile travel in the horizontal direction
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