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3 years ago

which unit of measure would scientist use to measure the thickness of rock layer, created as a result of volcanic activity

2 answers:

7 0

A scientist would use a unit of length appropriate for the magnitude of what he or she is measuring. In this case, since rock is built up very slowly, they would probably use millimetres or centimetres. In some cases they may use meters.

There you go.

frozen [14]3 years ago

3 0

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Which of these is an example of qualitative observation?

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Iron nails are attracted to the magnet

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Two cars leave Calgary at the same time, travelling in opposite directions. Their average speeds differ by 5 km/h. After 2 h, th

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Let the first car's average speed be x

The second car's speed would be x+5

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$2x+5=105$

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So the speed of the slower car is 50mph, and the speed of the faster car is 55mph

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A stack of 55 business cards is 1.85 cm tall. Use this information to determine the thickness of one business

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Two identical bowling balls are rolling on a horizontal floor without slipping. The initial speed of both balls is v = 10 m/s. B

Lapatulllka [165]

Answer:

The difference between frictionless ramp and a regular ramp is that on a frictionless ramp the ball cannot roll it can only slide, but on a regular ramp the ball can roll without slipping.

We will use conversation of energy.

$K_A_1 + U_A_1 = K_A_2 + U_A_2\\\frac{1}{2}I\omega^2 + \frac{1}{2}mv^2 + 0 = 0 + mgH_A$

Note that initial potential energy is zero because the ball is on the bottom, and the final kinetic energy is zero because the ball reaches its maximum vertical distance and stops.

For the ball B;

$K_B_1 + U_B_1 = K_B_2 + U_B_2$

$\frac{1}{2}I_B\omega^2 + \frac{1}{2}mv^2 + 0 = 0 + mgH_B$

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Hence, both balls climb the same point.

Explanation:

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3 years ago

Describe the energy transformation in a flashlight

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Answer: When the flashlight is turned on, the chemical energy stored in batteries is converted into electrical energy that flows through wires of flashlight. This electrical energy is then transformed into light and heat energies.

Explanation:

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