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PSYCHO15rus [73]
3 years ago
14

Cho cơ hệ như hình vẽ. Bỏ qua khối lượng các ròng rọc và

Physics
1 answer:
Fudgin [204]3 years ago
7 0

Answer:a1=2a2

T=9.8N

Explanation:

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I was processing over this one i can tell u! C or D got me stumped, please help me
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D. be transported from place to place
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When the water is evaporated in the air it can be moved from place to place by the wind.
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Some trees have red leaves all year long. You know that plants with green leaves make their food for themselves. How do you thin
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What are 2 ways that we can express to show our connection to our culture
garik1379 [7]

Answer:

Food, clothes, language, and belief

6 0
3 years ago
A 900-kg car cruising at a constant speed of 60 km/h is to accelerate to 100 km/h in 4 s. The additional power needed to achieve
kiruha [24]

To solve this problem we will apply the concepts related to power as a function of the change of energy with respect to time. But we will consider the energy in the body equivalent to kinetic energy. The change in said energy will be the difference between the two velocity data given by half of the mass. We will first convert the given units into an international system like this

Initial Velocity,

V_i = 60km/h (\frac{1000m}{1km})(\frac{1h}{3600s})

V_i = 16.6667m/s

Final Velocity,

V_f = 100km/h (\frac{1000m}{1km})(\frac{1h}{3600s})

V_f = 27.7778m/s

Now Power is defined as the change of Energy over the time,

P = \frac{E}{t}

But Energy is equal to Kinetic Energy,

P = \frac{\frac{1}{2} m\Delta v^2}{t}

P = \frac{\frac{1}{2} m(v_f^2-v_i^2)}{t}

Replacing,

P = \frac{\frac{1}{2} (900)(27.7778^2-16.6667^2)}{4}

P = 56kW

Therefore the correct answer is A.

8 0
3 years ago
calculate the charge on the maximum capacitor if a battery of potential difference 1.5 volts is placed across the plates.
salantis [7]

If a battery with a potential difference of 1.5 volts is placed across the plates, the maximum capacitor will have a charge of 36 V.

<h3>What possible variations are there in a 1.5 volt battery?</h3>

1 V is, by definition, a potential energy differential between two places equal to one joule for every coulomb of charge. Your query is resolved by that. Between the sites where that potential difference is measured, 1.5V denotes a potential energy differential of 1.5 joules per coulomb.

<h3>How do you determine the difference in potential energy?</h3>

ΔV=VB−VA=ΔPEq. By dividing the potential energy of a charge q that has been transported from point A to point B by the charge, we may define the potential difference between points A and B as VBVA. The joules per coulomb, sometimes known as volts (V) in honor of Alessandro Volta, are the units of potential difference.

To know more about potential energy difference visit ;

brainly.com/question/12807194?

#SPJ4

5 0
1 year ago
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