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Q. A proton moves perpendicularly to a uniform magnetic ?eld B with a speed of 1.9 × 10 ^7 m/s and experiences an acceleration of 8 × 10 12 m/s 2 in the positive x direction when its velocity is in the positive z direction. The mass of a proton is 1.673 × 10 -27 kg. Find the magnitude of the ?eld.
Q. A 7.80-g bullet moving at 570 m/s penetrates a tree trunk to a depth of 5.6 cm.
Use work and energy considerations to find the average frictional force that stops the bullet.
Question on center of gravity Discover speed of each block
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
Two automobiles of equal mass approach an intersection. One vehicle is travelling with velocity 13 m/s toward the east and the other is travelling north with speed v2i. Neither driver sees the other.
If water at 15°C is flowing through a 3cm diameter pipe with a velocity of 50 cm-1, calculate the Reynolds number. Is the flow turbulent or laminar?
A 80 kg football player stand at the end of a uniform 8m, 50kg diving board supported as shown. Determine the forces exerted by the two supports.
In a physics laboratory experiment, a coil with 200 turns enclosing an area of 12.0 cm^2 is rotated from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to field.
A long string is wrapped around a 6.60 diameter cylinder, initially at rest, that is free to rotate on an axle. The string is then pulled with a constant acceleration of 1.70 until 1.30 of string has been unwound. If the string unwinds without slippi..
The altitude of a hang glider is increasing at a rate of 6.80 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 15.5 m/s when the sun is directly overhead. Calculate the magnitude of the glider’s velocity.
The wavelength of an ocean wave
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
A man pushes on a piano with mass 200 {rm kg} so that it slides at constant velocity down a ramp that is inclined at 18.3^circ above the horizontal floor. Ignore any friction acting on the piano.
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