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Q. A particle with a charge of = -5.80 is moving in a uniform magnetic field of -1.30 . The magnetic force on the particle is measured to be -7.60×10-7. calculate the x component of the velocity.
Q. A uniform ladder whose length is 5.6 m and whose weight is 490 N leans against a frictionless vertical wall. The coefficient of static friction between the level ground and the foot of the ladder is 0.43. What is the greatest distance the foot of the ladder can be placed from the base of the wall without the ladder immediately slipping?
What is the CD's moment of inertia for rotation about a perpendicular axis by the edge of the disk.
Find the work function of the emitting surface and the wavelength of the second source. Determine the net work done on the piano.
A magnifier has a magnification of 8 times. How far from the lens should an object be placed so that its (virtual) image is at the near-point distance of 25 {rm cm}.
What is the velocity of the plank relative to the surface of ice.
The latent heat of fusion
You're in an airplane that flies horizontally with speed 1000 km/h (280m/s) when an engine falls off. Neglect air resistance suppose it takes 30s for the engine to hit the ground.
Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 71 km/h while car B travels at a constant speed of 90 km/h. how faris car A from school 2.2 h later.
A bat flying in a cave emits the sound pulse and receives its echo in 3.5 s. How far away is the cave wall.
A 60 kg person drops from rest a distance of 1.20m to a platform of negligible mass supported by a stiff spring. The platform drops 6cm before the person comes to rest.
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
A potter's wheel having a radius 0.55m and a moment of inertia 12.5 kg·m2 is rotating freely at 55rev/min. The potter can stop the wheel in 6s by pressing a wet rag against the rim and exerting a radially inward force of 68 N.
A person with a mass of 103 kg is standing on a scale that reads weight in newtons inside of an elevator. If the elevator accelerates upward at 3.2 m/s2, what does the scale read.
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