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A driver travels 10 km east, 20 km north and 50 km in a direction 30 degrees south of west. Draw this path and the final displacement vector. Express the final displacement in components using unit vectors. What is the drivers average velocity if the trip takes 90 minutes?
Analyse average density of the white dwarf
A 4.9 kg particle and a 2.7 kg particle have a gravitational attraction with a magnitude of 2.6 ? 10-12 N. What is the gravitational potential energy of the two-particle system
A standing observer perceives a train whistle to have a frequency of 300 Hz. compute the frequency of the sound waves emitted from the train
What is the integral from s to p of B dot dL, where an integral is taken along the dotted path shown, first from point P to point R at (x,y) = (0.707d, 0.707d), and then to point S at (x,y) = (0.6d, 0.6d).
The moon's diameter is 3.48 × 106 m, and its mean distance from the earth is 3.85 × 108 m. Find the diameter of the moon's image on the slide film
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons, What would be the force on the alpha particle if it were traveling parallel to the magnetic field lines
A 5-kg rock is dropped off a 30-m high building. If the rock is dropped from rest, what is the average power supplied by gravity
At a distance r1 from a point charge, magnitude of the electric field created by the charge is 296 N/C. At a distance r2 from the charge, the field has a magnitude of 168 N/C. Find the ratior2/r1.
A stone thrown off a bridge 20 m above a river has an initial velocity 14m/s of at an angle of 45 degrees above the horizontal. At what velocity does the stone strike the water
A fireman 44 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 22° above the horizontal. If the speed of stream as it leaves the hose is 40m/s, at what height will stream of water strike the buil..
A charge of -3.95 nC and a charge of -5nC are separated by a distance of 30.0 cm. Find the position at which a third charge of +8.00 nC can be placed so that the net electrostatic force on it is zero. How many cm from the -3.95 nC charge and how m..
The box is taken up a mountain where the air pressure outside the box is 8.00 104 Pa. The inside of the box is completely evacuated. Elucidate the magnitude of the force required to pull the lid off the box?
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