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3 years ago

9

Two identical objects are moving directly toward one another at the same speed what is the the total kinetic energy of the syste

m of the two objects

1 answer:

galina1969 [7]3 years ago

6 0

<span>Just add the two kinetic energies;
E = (1/2)mv^2 + (1/2)mv^2</span>

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A. Does this graph represent an endothermic or an exothermic reaction? Explain your answer.

ra1l [238]

Answer:

Exothermic reaction

Explanation:

Exothermic reaction relases energy while endothermic absorbs energy.

8 0

3 years ago

Two trucks with equal mass are attracted to each other with a gravitational force of 5.3 x 10 -4 N. The trucks are separated by

HACTEHA [7]

Answer:

7327 kg or 7.3 tons

Explanation:

We have Newton formula for attraction force between 2 objects with mass and a distance between them:

$F_G = G\frac{M_1M_2}{R^2}$

where $G =6.67408*10^{-11} m^3/kgs^2$ is the gravitational constant on Earth. $M = M_1 = M_2$ is the masses of the 2 objects. and R = 2.6m is the distance between them.

$F_G = 5.3*10^{-4}N$ is the attraction force.

$5.3*10^{-4} = 6.67408*10^{-11}\frac{M^2}{2.6^2}$

$7941265 = \frac{M^2}{2.6^2}$

$M^2 = 53682948.76$

$M = \sqrt{53682948.76} \approx 7327 kg$ or 7.3 tons

3 0

4 years ago

What is the value of the charge that experiences a force of 2.4 Ã— 10â€“3 n in an electric field of 6.8 Ã— 10â€“5 n/c?

tia_tia [17]

Answer:

The value of charge is 35.3 C

Explanation:

Given:

Force $F = 2.4 \times 10^{-3}$ N

Electric field $E = 6.8 \times 10^{-5} \frac{N}{C}$

According coulomb's law,

$F = qE$

Where $q =$ charge that experience a force,

For finding the value of charge,

$q = \frac{F}{E}$

$q = \frac{2.4 \times 10^{-3} }{6.8 \times 10^{-5} }$

$q = 35.3$ C

Therefore, the value of charge is 35.3 C

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3 years ago

Which of the following is an example of biotechnology?

anzhelika [568]

The short answer is a

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3 years ago

If you know the answer please answer the following question down in the picture below.

Harlamova29_29 [7]

I think it’s the second one: magnetic domains must come in pairs—one north and one south

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4 years ago