2 years ago

what are known as the properties of substances that help describe a substance et does not change that substances?

1 answer:

5 0

Answer:

Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.

Explanation:

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A ball is projected horizontally from the top of a bertical building 25.0m above the ground level with an initial velocity of 8.

kirill115 [55]

Answer:

Solution given:

height [H]=25m

initial velocity [u]=8.25m/s

g=9.8m/s

now;

a. How long is the ball in flight before striking the ground?

Time of flight =?

Now

Time of flight= $\sqrt{\frac{2H}{g}}$

substituting value

= $\sqrt{\frac{2*25}{9.8}}$
=2.26seconds

<h3>the ball is in flight before striking the ground for 2.26seconds.</h3>

b. How far from the building does the ball strike the ground?

Horizontal range=?

we have

Horizontal range=u* $\sqrt{\frac{2H}{g}}$

=8.25*2.26
=18.63m

<h3>The ball strikes 18.63m far from building. </h3>

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2 years ago

The metric unit to measure work which equals one newton meter is called?

Solnce55 [7]

The metric unit to measure work which equals one newton meter is called One Joule.

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2 years ago

If you were told an atom was an ion, you would know the atom must have a ______?

andreyandreev [35.5K]

Answer:

charge

Explanation:

7r0I and its etc. ,"!×_/;

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2 years ago

What is the control group

kolbaska11 [484]

Answer: the group in an experiment that doesn’t get treatment

Explanation:

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1 year ago

You can make a smoothie in a blender with a power of 400 watts and an efficiency of 85 percent. How much energy is actually bein

valkas [14]

Answer:

total energy is 14.12kj

energy at 85% is 12kJ

Explanation:

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2 years ago