A charged particle (mass = 4.0 ?g, charge = 5.0 ?C) moves in a region where the only force on it is magnetic. What is the magnitude of the acceleration of the particle at a point where the speed of the particle is 5.0 km/s, the magnitude of the magnetic field is 8.0 mT, and the angle between the direction of the magnetic field and the velocity of the particle is 60°?
a. 39 km/s2
b. 43 km/s2
c. 48 km/s2
d. 52 km/s2
e. 25 km/s2
b
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A flatbed truck is carrying a load of timber which is not tied down. The mass of the timber is 800 kg. The maximum frictional force between the truck bed and the load is 2400 N
What is the highest acceleration that the truck can have without losing its load?
Spherical Mirrors: Single convex spherical mirrors produce images that
A. are always smaller than the actual object. B. are always larger than the actual object. C. are always the same size as the actual object. D. could be larger than, smaller than, or the same size as the actual object, depending on the placement of the object. E. are sometimes real.
A dinosaur like a Brontosaurus with a small head and a large body would be expected to have an Encephalization Quotient (EQ) of
A) exactly 1 B) less than 1 but greater than zero C) zero D) greater than 1
Which of these did Rutherford's "solar system" model of the atom successfully explain?
a. Spectral lines. b. The periodic properties of the elements. c. How atoms could give off light without collapsing. d. Why some alpha particles would bounce back when hitting an atom. e. Absorption spectra.