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3 years ago

A digital stop-clock measures time in minutes and seconds.

Physics

1 answer:

ad-work [718]3 years ago

4 0

Answer:

01:20 (1 minute 20 seconds)

Explanation:

subtract the starting time from the stopping time to get the time used: 02:10 - 00:50 = 01:20

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3 years ago

How old is the universe

Virty [35]

Roughly 13.8 billion years old according to science

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2 years ago

Read 2 more answers

1. Which of the following statements best describes matter?

Rashid [163]

Answer:

Matter is anything that has mass

Explanation:

The word "matter" refers to anything that has mass, either organic or inorganic. Matter is made up of atoms, which consists of a nucleus (made up of protons, positively charged, and neutrons, electrically neutron) and electrons which revolve around the nucleus.

The number of protons in the atom determine the element: there are more than 100 different elements in nature, with different properties depending on the number of electrons they have.

Matter can be in three different states also:

- solid: the atoms are tightly bond to each other, so they cannot move

- liquids: atoms are not bond to each other, so they can slide past each other, but still they have some intermolecular forces that keep them close to each other

- gas: atoms are free to move, as there are no forces that keep them close to each other

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3 years ago

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Which part of earths surface has the greatest rotational speed

Anni [7]

Every point on the surface must have the same rotational speed.
Otherwise some places would rotate away from other places.

If the next block of your city rotated faster than the block that you live on,
then you could sit at home, look out the window, and watch your school
rotate past your house.

The map of the continents on the Earth would change constantly.

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3 years ago

7 the density of the american white oak tree is 752 kilograms per cubic meter. if the trunk of an american white oak tree has a

alexdok [17]

First, we determine the volume of the trunk by finding first the radius from the circumference through the equation,

C = 2πr

r = C/2π

Substituting the known values,

r = 4.5/2π = 0.716 m

Then, we calculate for the volume through the equation,

V = πr2h

V = π(0.716 m)2(8m) = 12.9 m3

Multiplying the calculated value to the density will give the mass as,

Mass = (12.9 m3)(752 kg/m3) = 9699.36 kg

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3 years ago