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fiasKO [112]
4 years ago
9

The question are in the picture plz help

Physics
1 answer:
Tanzania [10]4 years ago
4 0
3) The force of Gravity no longer works, aka you lose gravity.
4) What are the ideas? I can't see them.
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Displacement is the difference between the initial position and the____ position of an object
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<span>Displacement is the difference between the initial position and the FINAL position of an object.

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Groundwater is desirable for which of the following reasons?
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the answer is B. surface water can seep downward to become groundwater

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Ask a testable question about each event listed in part a
Ratling [72]

Answer:

What?-

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Where’s the story or whatever like that?

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A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. The brother's outst
Contact [7]

Answer:

v_{i}=10.10 m/s

Explanation:

The equation of the position is:

y=y_{i}+v_{i}t-0.5gt^{2}

Where:

v(i) is the initial velocity

The initial position y(i) will be zero and the final position y = 3.60 m.

So, we just need to solve this equation for v(i).

v_{i}=\frac{y+0.5gt^{2}}{t}

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v_{i}=10.10 m/s

Therefore, the initial velocity is 10.10 m/s upwards.

I hope it helps you!

5 0
3 years ago
A car accelerates uniformly from rest to 20 m/sec in 5.6 sec along a level stretch of road. Ignoring friction, determine the ave
bonufazy [111]

Answer:

(a) P=33000W

(b) P=51000W

Explanation:

The average power is defined as the amount of work done during a time interval:

P=\frac{W}{t}(1)

According to work-energy theorem, the work done is equal to the change in kinetic energy. So, we have:

W=\Delta K\\W=K_f-K_0\\W=\frac{mv_f^2}{2}-\frac{mv_0^2}{2}\\(2)

Recall that the weight is given by:

w=mg\\m=\frac{w}{g}(3)

The car accelerates uniformly from rest (v_0=0). Replacing (3) in (2), we have:

W=\frac{wv_f^2}{2g}

(a) Finally, we replace this in (1):

P=\frac{wv_f^2}{2gt}\\P=\frac{9000N(20\frac{m}{s})^2}{2(9.8\frac{m}{s^2})(5.6s)}\\P=33000W

(b)

P=\frac{14000N(20\frac{m}{s})^2}{2(9.8\frac{m}{s^2})(5.6s)}\\P=51000W

3 0
4 years ago
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