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Q. How much Power does it take to accelerate a 70,000 lb rail car from rest to 10mph in 20 feet with 1ft dia. wheels?
Q. A uniform electric field of magnitude 450 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.10 cm.
(a) What is the work done by the field on the electron?
(b) What is the change in potential energy associated with the electron?
(c) What is the velocity of the electron?
As you sit facing your computer screen, electrons are directed from a source at the back of the computer toward you and are deflected by a magnetic field. Which direction must the magnetic field be oriented in order to direct the electrons to the ..
A person wearing a safety belt can withstand an acceleration of -3.0 x 10^2 m/s2. How thick must barriers be to safely stop a car that hits a barrier at 112 km/h.
A uniform solid disk with a mass of 23.8 kg and a radius of 0.712 m is free to rotate about a frictionless axle. Forces of 92.0 and 124 N are applied to the disk. Taking the clockwise direction to be the negative direction, what is (a) net torque pro..
With what force F should she pull down on the rope to accelerate herself and platform upward at a rate of 0.77 m/s2.
Charge of uniform density (80 nC/m^3) is distributed throughout a hollow cylinder region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 2.0 mm from the symmetry..
How numerous extra electrons are on this particular oil drop (given the presently known charge of the electron)?
What is the average induced emf in the coil in mV. If he is crossing a river where the current is 1.60 km/h, in what direction should his boat be headed if he wants to reach the point directly opposite his starting point.
A music store has jazz, classical, country-western and rock music albums on tapes and CDs in the following quantities finding the probability.
An 24 g rifle bullet traveling 370 m/s buries itself in a 4.8 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. find the maximum vertical displacement of the pendulum.
Find out that the value of the gravitational field strength
Conclude the magnitude and directional angle
Sunlight is used in a double-slit interference experiment. The fourth-order maximum for the wavelength of 470 nm occurs at an angle of θ = 90°. Thus, it is on the verge of being eliminated from the pattern since θ cannot exceed 90°.
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