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zhannawk [14.2K]
3 years ago
14

1. An object travels 15 m in 3 s. What is the speed of the car?

Physics
1 answer:
weqwewe [10]3 years ago
3 0

1. Depends on how past the car is moving

2. The velocity is 5m a second heading south

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The smallest level of organization in living things is
Advocard [28]
The smallest level of organization in living things is the atom.

Next in line would be the cell, since a cell is made up of atoms working together. Next, cells working together would make up a tissue, and further, tissues working together would make up an organ.
6 0
3 years ago
A system releases 255 cal of heat to the surroundings while delivering 428 cal of work. what is the change in internal energy of
vichka [17]

Answer:-683 cal

Explanation:

Given

Heat released by system Q=-255 cal

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From First law of thermodynamics

Q=\Delta +W , where \Delta U=change in internal Energy

\Delta U=-255-428=-683

7 0
3 years ago
You wrap a wire around a piece of iron. If you slowly increase the strength of an electric current flowing through the wire, you
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The correct answer is A. the magnet to become stronger

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4 0
3 years ago
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Two students designed an experiment to study the effect of solar radiations on four cities of Earth. They used a globe to repres
Furkat [3]
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I hope the students remembered to tilt the axis of the globe.  If they didn't,
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3 0
3 years ago
All of the following are physical properties of hydrogen peroxide except it
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The answer to this question is B, Reacts with sunlight.

The 2 main properties of substances are their physical properties and chemical properties. 
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Meanwhile, for chemical properties, they're about how the substance reacts with other substances, such as metals react with acid to form hydrogen. And by the word "react", it means there's no way turn the reaction product back to the original substance without using chemical methods such as heating or electrolysis. 

Therefore, all the choices above are physical properties of hydrogen peroxide except for B, as it is the only choice that relates to the substance reacting to another substance. 
5 0
3 years ago
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