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kondaur [170]
3 years ago
9

We cannot see a new moon in our sky because ________. We cannot see a new moon in our sky because ________. a new moon is quite

near the Sun in the sky it is above the horizon during the daytime it is obscured by Earth's shadow no sunlight is illuminating the Moon
Physics
1 answer:
olasank [31]3 years ago
7 0

Answer:

a new moon is quite near the Sun in the sky

Explanation:

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When you hold a cold glass of water in your warm hand, which way does the heat flow ?
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Heat flows naturally from a warmer object (higher energy) to a cooler one (lower energy).

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The frequency of a wave is tripled, while the wave speed is held constant. What happens to the wavelength?
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The wavelength decreases
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Pulling up on a rope, you lift a 4.25 kg bucket of water from a well with an acceleration of 1.80 m/s2 . What is the tension in
sattari [20]

Answer:

49.3 N

Explanation:

Given that Pulling up on a rope, you lift a 4.25 kg bucket of water from a well with an acceleration of 1.80 m/s2 . What is the tension in the rope?

The weight of the bucket of water = mg.

Weight = 4.25 × 9.8

Weight = 41.65 N

The tension and the weight will be opposite in direction.

Total force = ma

T - mg = ma

Make tension T the subject of formula

T = ma + mg

T = m ( a + g )

Substitutes all the parameters into the formula

T = 4.25 ( 1.8 + 9.8 )

T = 4.25 ( 11.6 )

T = 49.3 N

Therefore, the tension in the rope is 49.3 N approximately.

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2 years ago
A boy wants use his slingshot to shoot a water balloon into the air. His
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A. 70 m OS the correct one

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3 years ago
A cello string vibrates in its fundamental mode with a frequency of 335 1/s. The vibrating segment is 28.5 cm long and has a mas
Inga [223]

Answer:

The tension in string is found to be 188.06 N

Explanation:

For the vibrating string the fundamental frequency is given as:

f1 = v/2L

where,

f1 = fundamental frequency = 335 Hz

v = speed of wave

L = length of string = 28.5 cm = 0.285 m

Therefore,

v = f1 2L

v = (335 Hz)(2)(0.285)

v = 190.95 m/s

Now, for the tension:

v = √T/μ

v² = T/μ

T = v² μ

where,

T = Tension

v = speed = 190.95 m/s

μ = linear mass density of string = mass/L = 0.00147 kg/0.285 m = 5.15 x 10^-3 kg/m

Therefore,

T = (190.95 m/s)²(5.15 x 10^-3 kg/m)

<u>T = 188.06 N</u>

4 0
2 years ago
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