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aleksley [76]
4 years ago
6

Before beginning an exercise program a person should always

Physics
1 answer:
swat324 years ago
8 0

Answer:

I do believe it is A it makes the most since

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what essential characteristic does a good experiment have? a. a control group is given the experimental treatment. b. a single v
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A. A control group is given the experimental treatment.
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A loading car is at rest on a track forming an angle of 25° with the vertical. The gross weight of the car and its load is 5500
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Divide 0.0081 by 300 seconds and express the answer in scientific notation.
Colt1911 [192]

Answer:

4×10⁴ seconds

Explanation:

Assuming you have a calculator on hand, inputting 300 ÷ .0081 give should give you 37037.0370...

In scientific notation, that number would be 3.70370370...×10⁴ and when taking into account the rounding rules for significant figures, the answer is 4×10⁴ seconds.

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By what factor does the jinetic energy of a car change when its speed is tripled?
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9

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3 years ago
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together t
Lina20 [59]

Answer:

dU=-4.36*10^{-18}J

Explanation:

From the question we are told that:

Average distance d_{avg} =5.29*10^{-11}m

Generally the equation for change in electric potential energy is mathematically given by

dU=u_f-U_1

Where

U_1=0 Because of initial lengthy distance apart

And

U_f=\frac{kq_eq_p}{d}

U_f=\frac{9*10^9*1.6*10^{-19}*-1.6*10^{-19}}{5.29*10^{-11}}

U_f=-4.36*10^{-18}J

Therefore

dU=u_f-U_1

dU=-4.36*10^{-18}J-0

dU=-4.36*10^{-18}J

3 0
3 years ago
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