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Q1. A dentist's drill starts from rest. After 3.20 s of constant angular acceleration, it turns at a rate of 2.46 104 rev/min.
(a) Find out the drill's angular acceleration.
(b) Determine the angle through which the drill rotates all through this period.
A person exerts a horizontal force of F = 175 N in the test apparatus shown in the drawing. (h = 0.25 m.) Find the horizontal force M that his flexor muscle exerts on his forearm.
A brick is thrown upward from the top of a building at an angle of 45° to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 2.8 s, how tall is the building.
The magnitude of q is chosen to make the potential difference between spheres 430 V, with the inner sphere at higher potential. Compute q.
Compute gauge pressure of the flowing water
A 9.0 cm diameter wire coil is at first oriented so that its plane is perpendicular to a magnetic field of 0.67 T pointing up. During the course of 0.30 s, the field is changed to one of 0.25 T pointing down. What is the average induced emf in coil.
If the contact time with the sidewalk is 1800s, what is the magnitude of an average force exerted on the superball by the sidewalk.
A second fragment, who's mass is 3.4 kg, moves away from the point of explosion with a speed of 418 m/s along the negative x axis. What is the speed of the third fragment? Ignore effects due to gravity.
In brief explain the changes that the Sun will go through after it exhausts its core hydrogen. Be sure to describe both the changes occurring in the Sun's core and the changes visible from outside the Sun. What do we mean by the stages we call hydrog..
What is lemmings kinetic energy
Compute the index of refraction of the gas
Find out vertical and horizontal components
Find out h orizontal angle of projectile
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