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earnstyle [38]
3 years ago
13

The graph of an object's position over time is a horizontal line and y is not equal to 0. What must be true abou

Physics
1 answer:
frozen [14]3 years ago
7 0

Answer:D: the velocity is zero

Explanation:

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energy can be transfered from one type to anogher in any convection some of the energy is lost ti the enviornment as
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<span>Energy can be transformed from one type to another in any convection. Some of the energy is lost to the environment as HEAT.</span>
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Two boys are sliding toward each other on a frictionless, ice-covered parking lot. Jacob, mass 45 kg, is gliding to the right at
Maurinko [17]

Answer:

v=0.3381\ m.s^{-1} in the direction of motion of Jacob

Explanation:

Given:

mass  of Jacob, m_j=45\ kg

velocity of Jacob, v_j=8.08\ m.s^{-1}

mass of Ethan, m_e=31\ kg

velocity of Ethan, v_e=10.9\ m.s^{-1}

Now using the conservation of linear momentum for the case:

(When the two masses in motion combine to form one after the collision then they will move together in the direction of the greater momentum.)

(m_j+m_e).v=m_j.v_j-m_e.v_e

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3 years ago
Indicate whether each of the following statements is true or false. In a coal-fired power plant, chemical energy is first conver
denis23 [38]

Answer:

1. In a coal-fired power plant, chemical energy is first converted to thermal energy. TRUE.

The chemical energy in the coal is converted to thermal energy when the coal is burnt to produce steam.

2. In a coal-fired power plant, approximately 2/5 of original energy in the coal is lost to heat. FALSE.

Approximately 3/5 of the original energy is lost not 2/5 so this statement is false.

3. The molecules in cold air move faster than in hot air. FALSE.

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3 years ago
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The speed of a space shuttle is 10 / express this in /�
12345 [234]

Answer:

268.22m/s

Explanation:

Given;

    10mile/min to m/s

We need to convert between the two units;

  Using the dimensions;

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     60s  = 1min

Now;

    10 x \frac{mile}{min} x \frac{1min}{60s} x \frac{1609.34m}{1mile}

  = 268.22m/s

3 0
3 years ago
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