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rjkz [21]
3 years ago
13

PART 2 OF ENERGY AND FORCES UNIT TEST

Physics
1 answer:
katrin2010 [14]3 years ago
4 0

Answer:

1. at least two charged interacting parts

2. from the electric fields of charged subatomic particles

3 an arrow released from the bow

4Electrical fields of charged particles interact, bonding those with opposite charges.

5 the interaction of the electric fields of protons and electrons

6 The energy stored in the system increases.

7 Kinetic energy increases because the magnets move in the direction of the field.

8 Iron pieces accelerate toward the magnet, and the energy stored in the system decreases.

9  

The energy stored in the field decreases because the magnet moves in the direction of the field.

10 The energy stored increases and then decreases.

11 The wire was not connected to the source.

12  The electromagnet will become more powerful.

the rest are written, hope this helps (:

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A simple pendulum is made from a 0.54-m-long string and a small ball attached to its free end. The ball is pulled to one side th
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Answer:

0.37sec

Explanation:

Period of oscillation of a simple pendulum of length L is:

T = 2 π × √ (L /g)

L=length of string 0.54m

g=acceleration due to gravity

T-period

T = 2 x 3.14 x √[0.54/9.8]

T = 1.47sec

An oscillating pendulum, or anything else in nature that involves "simple harmonic" (sinusoidal) motion, spends 1/4 of its period going from zero speed to maximum speed, and another 1/4 going from maximum speed to zero speed again, etc. After four quarter-periods it is back where it started.

The ball will first have V(max) at T/4,

=>V(max) = 1.47/4 = 0.37 sec

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You are trying to overhear a juicy conversation, but from your distance of 25.0 m , it sounds like only an average whisper of 20
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Answer:So You Decide To Move Closer To Give The Conversation A Sound Level Of 80.0dB Instead. ... You are trying to overhear a juicy conversation, but from your distance of 24.0m , it sounds like only an average whisper of 40.0dB .

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Answer:

V = 3.5 x 10⁻⁶ m³/s = 3.5 cm³/s

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The volume flow rate of the blood in the artery can be given by the following formula:

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V = (1.26\ x\ 10^{-5}\ m^2)(0.28\ m/s)

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