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3 years ago

What rules should you follow when adding and subtracting ?

2 answers:

5 0

Adding and subtracting with scientific notation may require more care, because the rule for adding and subtracting exponential expressions is that the expressions must havelike terms. Remember that to be like terms, two expressions must have exactly the same base numbers to exactly the same powers. Thinking about decimal arithmetic, the requirement that we have the same powers makes sense, because that guarantees that all of the place values are lined up properly.

german3 years ago

4 0

Negative - Negative = Negative.
Positive - Negative = Positive
Negative - Positive = Negative
Negative + Negative = Negative
Positive + Positive = Positive

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What is the temperature shown on the thermometer below?

vaieri [72.5K]

Answer:

- 13 * c

Explanation:

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3 years ago

Why are alkali metals so reactive?

Savatey [412]

Answer:

Alkali metals are among the most reactive metals. This is due in part to their larger atomic radii and low ionization energies. They tend to donate their electrons in reactions and have an oxidation state of +1. ... All these characteristics can be attributed to these elements' large atomic radii and weak metallic bonding.

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2 years ago

Choose the correct simplification of x^12z^11/x^2z^4

PolarNik [594]

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▹ Answer

x¹⁰z¹⁵

▹ Step-by-Step Explanation

x¹²z¹¹/x²z⁴

Reduce

x¹⁰z¹¹ * z⁴

Calculate

x¹⁰z¹⁵

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3 years ago

What are the two types of collisions? What is the difference between them? Types: a. Types: b. Compare and contrast the two type

mr_godi [17]

Answer:

The two types of collisions are :

Type a)

Elastic collision

Type b)

Inelastic collision

Explanation:

Collision : It is the event when two bodies collide with each other for small period of time.

During collision , the bodies exert force to each other.

Example :

When boxer hits with punches .

When bat hits the ball in cricket match.

So, collision is short duration interaction of two objects. When the objects collides , there is change in their velocity.

All collision follow law of conservation of momentum . Their type is decided by , whether they follow conservation of energy also.

Compare and contrast the two types

a) Elastic collision : Those collision in which no loss or gain of kinetic energy will occur. They follow conservation of kinetic energy. Example : ideal gaseous molecule

b) Inelastic collision : Those collision in which Change in kinetic energy will occur. They do not follow conservation of kinetic energy.Almost all conservation are inelastic.

Here Kinetic energy get converted into other form of energy.

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3 years ago

Which of these lists the layers of the Earth from the outermost layer to the innermost layer?

Bond [772]

Answer:

Lithosphere, mantle, outer core, inner core

Explanation:

4 0

2 years ago

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