A computer accessory salesman attempts to convince you to purchase a "solar neutrino" shield for your new computer. (It's even "on sale"!) Why do you turn down this excellent offer?

A) Neutrinos rarely, if ever, interact with your computer.
B) The Earth's natural magnetic field already offers excellent protection against the onslaught of solar neutrinos.
C) Solar neutrinos are generated by solar winds, but we're in a solar minimum now, so the risk of damage is very low.
D) There's no such thing as a solar neutrino.


A

Physics & Space Science

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Beats: Two police cars have identical sirens that produce sound of frequency of 570 Hz. A stationary listener is standing between two cars. One car is parked and the other is approaching the listener and both have their sirens on. The listener measures 9.0 beats per second. Find the speed of the approaching police car. The speed of sound is 340 m/s.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

An object moves 15.0 m north and then 11.0 m south. Find both the distance it has traveled and the magnitude of its displacement

A) 4.0 m, 26.0 m B) 26.0 m, 4.0 m C) 26.0 m, 26.0 m D) 4.0 m, 4.0 m

Physics & Space Science

Two charges, +Q and ?Q, are located two meters apart and there is a point along the line that is equidistant from the two charges as indicated. Which vector best represents the direction of the electric field at that point?



a.
Vector EA

b.
Vector EB

c.
Vector EC

d.
The electric field at that point is zero.

Physics & Space Science

The potential energy of a pendulum is least

a. when its potential energy is greatest. b. at the top of its swing. c. at the bottom of its swing. d. when its total energy is greatest.

Physics & Space Science