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3 years ago

NO LINKS! ASAP PLEASE FOR TEST TOMORROW

Physics

1 answer:

denis23 [38]3 years ago

8 0

Answer:

Friction: When two surfaces slide against each other / make contact with each other

Force: A push or pull exerted on an object

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The total length of the wire of potentiometer is 10m. A potential gradient of 0.0015 V/cm is obtained when a steady current is p

andreyandreev [35.5K]

Answer:

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Explanation:

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3 years ago

The difference in potential between the cathode and anode of a spark plug is 14700 v. what energy does the electron give up as i

Verdich [7]

The energy the electron gives up passing between the electrodes is equal to the product between its charge and the potential difference between the electrodes:
$\Delta U = e \Delta V$
where
e is the electron charge
$\Delta V$ is the potential difference

Plugging numbers into the equation, we find that the electron gives up is
$\Delta U = (1.6 \cdot 10^{-19} C)(14700 V)=2.35 \cdot 10^{-15} J$

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4 years ago

Why is it important to use the correct number of significant digits when

Pani-rosa [81]

A. To show how precise your measurements were

Explanation:

It is important to use the correct number of significant digits when reporting the results of an experiment because they show how precise measurement are.

Precision is the ability to reproduce a particular set of results in an experiment.
Every instrument have their precision level.
The precision levels shows to what extent the values obtained can be trusted..
Significant figures are not only important in recording measurements, they are also needed for calculations in science.

Learn more:

Significant figures brainly.com/question/4967602

#learnwithBrainly

5 0

4 years ago

A car (mass 1200 kg, speed 100 km/h) and a truck (mass 2800 kg, speed 50 km/h) are moving in the same direction along a highway.

Sloan [31]

Answer:

Speed of the wreck after the collision is 65 km/h

Explanation:

When a car hits truck and sticks together, the collision would be totally inelastic. Since the both the vehicles locked together, they have the same final velocity.

Mass of car $m_{1}=1200 kg$

Mass of truck $m_{2}=2800 kg$

Initial speed of the car $u_{1}=100 km /h$

Initial speed of the truck $u_{2}=50 km /h$

The final velocity of the wreck will be

$m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1}+m_{2}v_{2}$

since final speed are same, $v_{1}=v_{2}=v$

$m_{1}u_{1}+m_{2}u_{2}=(m_{1}+m_{2})v$

$1200\times 100 +2800 \times 50 =(1200+2800)v\\v=\frac{260000}{4000} \\v=65 km/h$

5 0

3 years ago

Elsa has a jar of honey that was left outside on a hot summer day. She notices that there are now sugar crystals at the bottom o

gavmur [86]

The solution is supersaturated. The answer is letter C.

A supersaturated solution has more dissolved solute in it than what it would normally have. This could be achieved if you dissolve more solute while heating the solution. However, once the solution cools, crystallization would occur. As a result, you see crystals settling at the bottom.

7 0

3 years ago

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