Define acceleration, and give an example
Acceleration is the time rate of change of velocity. Ex: a ball falls with an
acceleration of 9.8 m s2 when released near the surface of the Earth.
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A metal block sits on top of a floating wooden block. If the metal block is suspended from the bottom of the wooden block, what happens to the volume of the wooden block that is submerged in the water?
To achieve a high equivalent resistance for a pair of resistors, connect them in
A) series. B) parallel. C) either of these
If a sheet containing a single thin slit is heated (without damaging it) and therefore expands, what happens to the width of the central bright diffraction region on a distant screen?
A) It gets narrower. B) It gets wider. C) It doesn't change.
The planetary model of the hydrogen atom consists of an electron in a circular orbit about a proton. The motion of the electron of charge 1.60 × 10^-19 C creates an electric current. The radius of the electron orbit is 5.30 × 10^-11 m and the electron's velocity is 2.20 × 10^6 m/s. What is the magnetic field strength at the location of the proton?