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The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 180 N. Find the length of the spring in this situation.
The intensity of a cylindrical laser beam is 0.800 {rm W}/{rm m}^{2}. What is the rms value of the electric field in the beam.
Assuming the frictional force is constant, determine how much time elapses between the moment the bullet enters the tree and the moment it stops moving.
The wheel is then brought to rest, with uniform deceleration, in 13.6 rev. Find the magnitude of the angular deceleration required to bring the wheel to rest.
Show explicitly that the wave function corresponding to different energies are orthogonal.
This force is directed opposite to her motion. What is the change in length of the rope when the skier has an acceleration whose magnitude is 0.65 m/s2?
Find the apparent visual magnitude m of the star if it is lying in front of the nebula (Answer to three significant figures).
To the nearest micron (millionth of a meter), what is the change in length of the rod produced by the student's weight?
The plates of a parallel-plate capacitor are 3.50 apart, and each carries a charge of magnitude 75.0 . The plates are in vacuum. The electric field between the plates has a magnitude of 5.00×
If the scientific test of a scientific theory is accepted by the community of men and women who are called scientists, does that mean that anything is acceptable as long as enough of the right peop
A motorist traveling with constant velocity of 15 m/s (about 34 mph) passes a schoolcrossing corner, where the speed limit. What is the officers speed at that point?
A 1.85- sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. T
How many total seconds will it take the police to reach the speeding car and how many miles from his/her starting position will the police car have traveled.
A long, narrow rectangular loop of wire is moving toward the bottom of the page with a speed of 0.025 m/s (see the drawing). The loop is leaving a region in which a 2.1 T magnetic field exists; the
By equating the electric force to the electron mass times its acceleration, derive an expression for the electron's speed. (b) Obtain an expression for the electron's kinetic energy.
A proton moves perpendicular to a uniform magnetic field at a speed of 1.80 107 m/s and experiences an acceleration of 3.00 1013 m/s2 in the positive x-direction when its velocity is in the positiv
What was the electric potentialenergy of the alpha-radon combination just before the decay, inMeV and in joules? (b) Use your result from part (a) to calculatethe radius of the radon nucleus.
A car dealer claims that his product will accelerate at a constant rate from rest to a speed of 200 km/hr in 8s. What approximate distance will the car travel?
A 6.2 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.63 T pointing up. During the course of 0.10 s, the field is changed to one of 0.25 T po
If the actual speed of the child at the lowest position is 1.60 m/s, what is the mechanical energy lost due to friction?
To the horizontal. if the wagon weighs 150N, with what force must the child pull on the handle if the handle is parallel to the incline?
A man pulls a crate of mass 73.0 kg across a level floor. He pulls with a force of 190.0 N at an angle of 26.0° above the horizontal. When the crate is moving, the frictional force between the
A 230 g block on a 47 cm-long string swings in a circle on a horizontal, frictionless table at 61 rpm.What is the speed of the block? What is the tension in the string?
0.420 kg block is attached to a that is horizontal spring at its equilibrium length, and whose force constant is 21.0 N/m. The block rests on a frictionless surface. A 6.00×10-2 kg wad of putt