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3 years ago

13

List two things phytoplankton need to survive. Name at least two special adaptations phytoplankton have to stay in the photic zo

ne.
Thanks

1 answer:

cluponka [151]3 years ago

8 0

They need water and sunlight to survive

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This is an electrical device that changes the voltage of electricity through the use of two set of coils

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Voltmeter is the right answer

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2 years ago

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Which scenario is an example of the transfer of thermal energy by radiation?

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Answer:the answer is B

Explanation: just took the quiz

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A mars prototype carrying scientific instruments has a mass of 1060kg. a net force of 52000 n is applied to this roverat a test

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F = 52000 N

m = 1060 kg

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3 years ago

Say you want to make a sling by swinging a mass M of 1.7 kg in a horizontal circle of radius 0.048 m, using a string of length 0

DENIUS [597]

Answer:

Tension in the string is equal to 58.33 N ( this will be the strength of the string )

Explanation:

We have given mass m = 1.7 kg

radius of the circle r = 0.48 m $F=\frac{mv^2}{r}=\frac{1.7\times 4.05^2}{0.48}=58.33N$

Kinetic energy is given 14 J

Kinetic energy is equal to $KE=\frac{1}{2}mv^2$

So $\frac{1}{2}\times 1.7\times v^2=14$

$v^2=16.47$

v = 4.05 m/sec

Centripetal force is equal to $F=\frac{mv^2}{r}=\frac{1.7\times 4.05^2}{0.48}=58.33N$

So tension in the string will be equal to 58.33 N ( this will be the strength of the string )

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2 years ago

Which of the following best describes the term thermal energy? Choose one: A. The energy of an object in motion due to its mass

o-na [289]

Answer:

The correct option is (d).

Explanation:

The energy a particle has because of its charge and its position relative to another particle is called thermal energy.
It is the energy that comes from heat. This is generated by the movement of the particles in an object.
Thermal energy is the energy an object or system has due to the movement of particles within.

Hence, the correct option is (d).

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2 years ago