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2 years ago

Energy from food

Physics

2 answers:

I am Lyosha [343]2 years ago

8 0

Answer:

all of the above I think??

Simora [160]2 years ago

5 0

The answers are 2) can be used to keep your heart beating and 3) keep your heart beating.

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Select the correct answer.

Ierofanga [76]

Answer:

The brick would heat up the fastest.

Explanation:

Bricks are thick but they absorb sunlight at an alarming rate.

7 0

3 years ago

A steel sphere of mass 0.5kg travelling at 2m/s collides with an identical sphere at rest. What is the total momentum after coll

PSYCHO15rus [73]

Answer:

The total momentum after the collision is 1 kg-m/s.

Explanation:

We have,

Mass of a steel sphere is 0.5 kg

It is travelling with a speed of 2 m/s

It collides with an identical sphere at rest.

The law of conservation of momentum states that the initial momentum is equal to the final momentum for an isolated system. Here, initial momentum is :

$p_i=p_f=mv\\\\p_i=p_f=0.5\times 2\\\\p_f=1\ kg-m/s$

So, the total momentum after the collision is 1 kg-m/s.

3 0

3 years ago

PLS HELP QUICK What are the three categories of plant life spans and how long are they?

Temka [501]

Answer:

drag and drop each feature into the correct category

6 0

3 years ago

Two identical soccer balls are rolled toward each other. What will be true after they collide headon? (2 points)

elixir [45]

Complete Question:

Two identical soccer balls are rolled toward each other. What will be true after they collide headon?

Group of answer choices.

A. they will both stop rolling immediately after they collide head–on.

B. One ball will stop rolling and the other will roll backward at a slower speed.

C. They will both roll back at the same speed they had before the collision

D.They will both roll to the side at a faster speed after the collision

Answer:

C. They will both roll back at the same speed they had before the collision

Explanation:

Newton's Third Law of Motion which states that, for every action there is an equal but opposite reaction.

This ultimately implies that, in every interaction, there is a pair of forces acting on the two interacting objects.

In this scenario, two identical soccer balls are rolled toward each other. Thus, after they collide headon, they will both roll back at the same speed they had before the collision in accordance with Newton’s Third Law of Motion.

Additionally, The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.

This ultimately implies that, if the two identical soccer balls exert forces only on each other, their total momentum is conserved

5 0

3 years ago

Una onda cuya frecuencia es igual a 550 Hz, se propaga en el aire. ¿ cual es su longitud de onda y su periodo?

oee [108]

Answer:

The wavelength of the wave is $5.45\times 10^5\ m$ and time period is 0.0018 s.

Explanation:

The given question is, "A wave whose frequency is equal to 550 Hz, propagates in the air. What is its wavelength and its period?"

Given that,

The frequency of a wave, f = 550 Hz

The time period of a wave,

$T=\dfrac{1}{f}\\\\T=\dfrac{1}{550}\\\\T=0.0018\ s$

Wavelength,

$\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{550}\\\\\lambda=5.45\times 10^5\ m$

So, wavelength of the wave is $5.45\times 10^5\ m$ and time period is 0.0018 s.

8 0

3 years ago