Homework Help for Physics (page 3)

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A spherical mirror is silvered on both sides, so it’s concave onone side and convex on the other. When an object is 56 cm from oneside, a real image forms 35 cm from that side.

Find the curvature radius.

Answered
25 Jul 2019

  1. Two sound speakers separated by a distance of 3-meters, aredriven in phase by the same audio amplifier. A listener sitsdirectly in front of one speaker at a distance of 4 meters from itso that the listener and speakers form a right triangle. Find thethree lowest frequencies which will not be heard by the listener.Where should the listener be positioned if all frequencies are tobe heard? Use 340m/sec for the velocity of sound.

Answered
22 Jul 2019

What object provides the inertial frame of reference?

Answered
17 Jul 2019

What is Newton’s Law of Motion?

Answered
17 Jul 2019

A house painter stands 3.0 m above the ground on a 5.0 m ladder that leans against the wall at a point 4.7 m above the ground. The painter weighs 655 N and the ladder weighs 134N. Assuming no friction between the house and the upper end of the ladder, find the force of friction that the driveway exerts on the bottom of the ladder.

Answered
13 Jul 2019

Chapter 27 part 4:

The work functions for three metals X, Y. and Z are 4, 5, and 6 eV,respectively. Photoelectrons are created when UV light shines onthese metals. The photoelectrons from which metal would have thelargest stopping voltage?


A. Z

B. Y

C. X

Answered
12 Jul 2019

a .104 kg meterstick is supported at its 32.3 cm mark by a stringattached to the ceiling. A .602 kg mass hangs vertically from the4.98 cm mark. A mass is attached somewhere on the the meterstick tokeep it horizontal and in BOTH rotational and translationalequilibrium. The force applied by the string attaching the meterstick to the ceiling is 23N.
Find the value of the unknown mass. The acceleration of gravity is9.81
Answer in units of Kg

Answered
10 Jul 2019

How does the law of conservation of matter and energy relate to the cycles in nature?

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10 Jul 2019

What are some examples of work?

Answered
10 Jul 2019

How can I distinguish functional group region and fingerprint region in an infrared spectrum?

Answered
10 Jul 2019

What are the differences between stretching vibrations and bending vibrations?

Answered
9 Jul 2019

What is the linear mass density?

Answered
9 Jul 2019

What kind of visible spectrum does an incandescent light bulb produces?

Answered
5 Jul 2019

Do the magnetic field lines really start at the pole face?

Answered
4 Jul 2019

Is it true that most conducting materials have different resistance at different temperatures?

Answered
4 Jul 2019