4 years ago

Walking across a carpet is an example of charge being transferred by

Physics

1 answer:

Sati [7]4 years ago

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static electricity and friction

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QUESTION 1 The speed of sound in air is 340 m/s. What is the wavelength of a soundwave that has a frequency of 968 Hz?

Anton [14]

Answer:

Explanation:

340 m/s / 968 cyc/s = 0.3512396... ≈ 35.1 cm

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3 years ago

A boat crosses a river of width 229 m in which the current has a uniform speed of 0.756 m/s. The pilot maintains a bearing (i.e.

Stolb23 [73]

Answer:

1.85 m/s

102.438 m

Explanation:

From vector motion

The resultant velocity

$R=\sqrt{0.756^2+1.69^2}\\\Rightarrow R=1.85\ m/s$

The magnitude of speed of the speed of the boat relative to a stationary shore observer is 1.85 m/s

The distance covered is 229 m

Time = Distance / Speed

$\text{Time}=\frac{229}{1.69}\\\Rightarrow \text{Time}=135.50\ s$

Distance = Speed of current × Time

Distance = 0.756×135.5 = 102.438 m

The boat will be 102.438 m from the initial position is the boat when it reaches the opposite shore

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4 years ago

Well-designed weight-training programs only target two or three body areas. a. True b. False

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False, well designed weight training programs actually target most of the muscles in the body. A good weight training program includes many compound exercises to activate multiple muscle groups and promote muscle hypertrophy. Some isolation exercises may also be included to target a specific muscle and help it grow.

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A standing wave is a wave that travels through space indefinitely. True or false

Step2247 [10]

A standing wave is a wave that travels through space indefinitely.:
False.

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7. The S.l. unit for force is A. kg C. m/s B. m/s2 D. N

netineya [11]

D.N(Newton) this is the S.I unit for force

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