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Vesna [10]
3 years ago
7

You drop a stone down a well that is 100.0 m deep. How long will it take for the stone to reach the bottom, ignoring air resista

nce?
Remember, rest is the initial velocity and it equals 0.0 m/s
01.05
O 4.5 s
o 20 s
O 10 s
Physics
1 answer:
3241004551 [841]3 years ago
7 0

Answer:

4.5s

Explanation:

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Describe the concept that defines weather an object
xz_007 [3.2K]

An object has identity(each object is a distinct individual). An object has state(it has various properties, which might change). An object has behavior(it can do things and can have things done to it). This is a somewhat ordinary description of what an object is like.

7 0
3 years ago
A sail boat moves north for a distance of 10 km when blown by a wind 30° east of south with the force of 5.00×10^4 N. how much w
erma4kov [3.2K]
<h3><u>Answer;</u></h3>

a) 5.00 x 10^8 J

<h3><u>Explanation;</u></h3>

The work done to move the sailboat is calculated through the equation;

W = F x d

where F is force and d is the distance.

Substituting the known values from the given above,

                             W = (5.00 x 10⁴ N)(10 km)(1000 m/ 1km)

                                 = 5.00 x 10⁸ J

Thus, the work done is <u>5.00 x 10⁸Joules</u>

7 0
3 years ago
What is the difference between sounds that have the same pitch and loudness? the standing wave the natural frequency the sound q
Elden [556K]

Answer:

Sound quality

Explanation:

Loudness refers to the property of sound that depends on the amplitude of the sound wave while pitch is the property of sound that depends on the frequency of the sound wave.

Now, when sounds have the same pitch and loudness, it means they possess the same natural frequency and also, they will have similar resonance and standing waves. Despite all these similarities, the quality of these sounds will tend to vary from one to another.

5 0
3 years ago
Read 2 more answers
an astronaut in the satellite releases a pencil out of the satellite in space. will the pencil fall on the earth?​
MAXImum [283]

No, it will not fall. The pencil will remain at zero speed relative to the spacecraft and will orbit the earth with the spacecraft.

5 0
3 years ago
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The speed of a certain proton is 350 km/s. If the uncertainty in its momentum is 0.100%, what is the necessary uncertainty in it
Evgesh-ka [11]

Answer:

\Delta x = 1.807 \times 10^{-10}m

Explanation:

mass of proton, m = 1.67 x 10^-27 kg

speed of proton, v = 350 km/s = 350,000 m/s

Momentum of proton, p = mass x speed

p =  1.67 x 10^-27 x 350000 = 5.845 x 10^-22 kg m /s

uncertainty in momentum, Δp = 0.1 % of p

Δp = \frac{0.1\times 5.845 \times 10^{-22}}{100}=5.845 \times 10^{-25}

According to the principle

\Delta x\times \Delta p \geq  \frac{h}{2\pi }

where, Δx be the uncertainty in position

\Delta x\times 5.845 \times 10^{-25}=  \frac{6.634 \times 10^{-34}}{2\times 3.14}

\Delta x = 1.807 \times 10^{-10}m

5 0
3 years ago
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