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2 years ago

12

A girl scout is pulling her 30 kg wagon of cookies with a force of 60 N to right. Friction pulls back with a force of 15 N left.

What is net force on the wagon

1 answer:

andreyandreev [35.5K]2 years ago

8 0

Answer:

net force = 45 newton towards right

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For Valentine’s Day, Sally received a helium-filled balloon at a party. On returning home she accidentally left the balloon in t

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If the temperature of the air in the balloon is less than the temperature of the air surrounding the balloon then the balloon will appear slightly deflated because of the difference in temperature.

As the temperature of the air in the balloon reaches the surrounding air temperature, then the balloon will appear to be fully inflated because the temperature of the air in the balloon is the same as the surrounding air temperature.

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3 years ago

When electrons are lost, a blank ion is formed

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3 years ago

A particle with a charge of 3.00 elementary charges moves through a potential difference of 4.50 volts. What is the change in el

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Answer:

$7.2\cdot 10^{-19} J$

Explanation:

The change in electrical potential energy of a charged particle moving through a potential difference is given by

$\Delta U = q \Delta V$

where

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$\Delta V$ is the potential difference

In this problem:

- the charge of the particle is 3.00 elementary charges, so

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- the potential difference is

$\Delta V=4.50 V$

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$\Delta U=(1.6\cdot 10^{-19}C)(4.50 V)=7.2\cdot 10^{-19} J$

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3 years ago

When an object stops moving, changes speed, or changes direction, how does a scientists describe that condition?

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The answer is A. unbalanced forces

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3 years ago

I need help answering this question.

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The work done is the loss of kinetic energy.

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