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A positron (q = +e) moves at 4.88 x 107 m/s in a magnetic field of magnitude 0.410 T. The magnetic force on the positron has magnitude 2.41 x 10-12 N. What is the component of the positron's velocity
A 2,021-kg car is moving down a road with a slope (grade) of 13% while slowing down at a rate of 3.4 m/s^2. What is the direction and magnitude of the frictional force? (define positive in the forwa
When the tension of the cable is steady at 1.29 × 104 N, with what force is the boat's engine pushing the boat?
A horizontal rifle is fired at a bull's -eye. the muzzle speed of the bullet is 670m/s the gun is pointed directly at the center of the bull's -eye but the bullet strikes the target 0.025m below the
what are the components of the coyote's velocity just before he reaches the ground?
In a classical model of the hydrogen atom, the electron orbits the proton in a circular orbit of radius 0.053 What is the orbital frequency?
Two point charges lie on the 10.4cm axis. A charge of 9.8 x 10^-6 C is at the origin and a charge of -4.6 x 10^-6 C is at the x = 10.4cm. At what position x would a third charge q3 be in equilibrium
An electron in a uniform electric field increases its speed from 1.7×107 to 4.1×107 over a distance of 1.3. what is the electric field strength?
An exoplanet of mass = 5 times the mass of Jupiter and 3 Jupiter radii orbits a star identical to the sun at a distance of 3 AU from the star. Assuming the a circular orbit: a) estimate the period o
It is observed that it took 18 for the pulse to return. What is the tension in the cable?
A jogger runs with a speed of 3.25 m /s I. A direction. Of 30.0 degrees above the x axis a. Find the x and y components. Of the jiggered velocity
A 5.45-kg ball hangs from the top of a vertical pole by a 2.19-m-long string. The ball is struck, causing it to revolve around the pole at a speed of 4.37 m/s in a horizontal circle with the string
Calculate the limiting visual brightness in magnitudes for naked eye viewing through a 10-m telescope. Assume the eye has a pupil diameter of 0.2 in.
The solar constant is the flux of the Sun's radiation at the top of the Earth's atmosphere. Calculate it's value assuming that the sun is a blackbody with an effective temperature of 5800 K, a radiu
A wire 10 m long with a diameter of 1.0 mm has a resistance of 5.0 ?. The resistance of a second wire made of the same material, but 3.0 m long with a diameter of 4.0 mm, is approximately?
The patient is wheeled through the emergency room entrance 19 m east down a hall to an elevator, -9 m down an elevator, and 32 m south to an operation room. How far is the emergency room entrance fr
The battery is now disconnected from the capacitor. What is V, the voltage across the capacitor?
In ordinary laboratory circuits, charges in the \mu {\rm C} and {\rm nC} range are common. Part A) How many excess electrons must you add to an object to give it a charge of -3.00\mu {\rm C} ? Part
What is the minimum stopping distance for the same car traveling at a speed of 36 m/s?
A hollow copper wire with an inner diameter of 1.1 mm and an outer diameter of 1.8 mm carries a current of 15 A. What is the current density in the wire?
How far away from you is this car when its taillights appear to merge into a single spot of light because of the effects of diffraction?
Assuming that the visible spectrum extends from 380 to 750 nm, what is the longest visible wavelength (in vacuum) for which the film will appear bright due to constructive interference?
In a Young's double-slit experiment the separation distance y between the second-order bright fringe and the central bright fringe on a flat screen is 0.0169 m, when the light has a wavelength of 42
Oppositely charged parallel plates are separated by 5.31 mm. A potential difference of 600 V exists between the plates.