1 year ago

Why Study Science? Help me out

Physics

2 answers:

Mashutka [201]1 year ago

6 0

All but the last one!

faust18 [17]1 year ago

3 0

All of the above should be the correct answer

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What types of bonds do you think the good conductors of electricity have?

mariarad [96]

This what i found hope it helps

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4 years ago

What is the speed of a truck that travels 60 km in 20 minutes

Alexxandr [17]

Formula:
Speed = Distance ÷ Time

Solution:
Speed = 60 ÷ 20
= 3km/min

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3 years ago

A 59.3 kg diver jumps off a board

ser-zykov [4K]

The board is 2.50m high.

Why?

We can calculate how high was the board applying the Law of Conservation of Mechanical Energy. This Law states that the mechanical energy (kinematic and potential) will be conserved during the motion.

It can be described with the following formula:

$E_{M_{1}}=E_{M_{2}}\\\\PE_{1}+KE_{1}=PE_{2}+KE_{2}$

$PE=m*g*h\\KE=\frac{1}{2}m*v^{2}$

At the top of the boar, the kinetic energy is equal to 0.

At the water, the potential energy is equal to 0.

So,

$PE_{1}=KE_{2}\\\\m*g*h=1450J\\\\59.3kg*9.8\frac{m}{s^{2}}*h=1450J\\ \\h=\frac{1450J}{59.3kg*9.8\frac{m}{s^{2}}}=2.50m$

Hence, we have that the board is 2.50m high.

Have a nice day!

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4 years ago

Which is an example of a solution?

vladimir1956 [14]

Answer:

Explanation:

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3 years ago

This is the constructive or destructive overlap of waves.

natima [27]

Wave interference is the phenomenon that occurs when two waves meet while traveling along the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium.

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3 years ago