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otez555 [7]
3 years ago
12

How do thermometers work?

Physics
2 answers:
lozanna [386]3 years ago
7 0

Answer:

the answer is "B"

Explanation:

Thermometer has either alcohol or mercury, has some reaction when it meets heat. When a thermometer meets heat the liquid substance in the thermometer expands or has thermal expansion. the thermometer measures the kinetic energy of the particles in a object.

Charra [1.4K]3 years ago
6 0
The right answer is b
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A boy can swim 3.0 meter a second in still water while trying to swim directly across a river from west to east, he is pulled by
lana66690 [7]

Answer:

Angle: 48.19^o

Explanation:

<u>Two-Dimension Motion</u>

When the object is moving in one plane, the velocity, acceleration, and displacement are vectors. Apart from the magnitudes, we also need to find the direction, often expressed as an angle respect to some reference.

Our boy can swim at 3 m/s from west to east in still water and the river he's attempting to cross interacts with him at 2 m/s southwards. The boy will move east and south and will reach the other shore at a certain distance to the south from where he started. It happens because there is a vertical component of his velocity that is not compensated.

To compensate for the vertical component of the boy's speed, he only has to swim at a certain angle east of the north (respect to the shoreline). The goal is to make the boy's y component of his velocity equal to the velocity of the river. The vertical component of the boy's velocity is

v_b\ cos\alpha

where v_b is the speed of the boy in still water and \alpha is the angle respect to the shoreline. If the river flows at speed v_s, we now set

v_b\ cos\alpha=v_s

\displaystyle cos\alpha=\frac{v_s}{v_b}=\frac{2}{3}

\alpha=48.19^o

8 0
3 years ago
What is the main difference between magma and lava
Colt1911 [192]
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4 0
3 years ago
An action potential arriving at the presynaptic terminal causes what to occur?
Ulleksa [173]

Answer:

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5 0
3 years ago
What is the period? Blank seconds.
FromTheMoon [43]

Answer:

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anygoal [31]

Answer:

Cerebral palsy

Explanation:

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7 0
3 years ago
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