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3 years ago

What is 6.9 × 107 written in standard form?

Physics

2 answers:

aalyn [17]3 years ago

8 0

Answer:

DDDDDD

Explanation:

n200080 [17]3 years ago

7 0

Answer: 6.9x 107 in standard form is 69,000,000

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How is potential energy converted to thermal energy in a system?

Natali [406]

For example, an internal combustion engine converts<span> the </span>potential<span> chemical </span>energy <span>in gasoline and oxygen into </span>thermal energy<span> which, by causing pressure and performing work on the pistons, is </span>transformed<span> into the mechanical </span>energy<span> that accelerates the vehicle (increasing its kinetic </span>energy<span>).</span><span />

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4 years ago

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Even though it's not very popular these days, I like our system . Getting together to talk about who the best candidate might be

DaniilM [7]

Answer:

I think it would be C: open primary

Explanation:

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3 years ago

If an engine at sea level produces 100 horsepower, how many horsepower would it develop at 6,000 feet of altitude?

Sonja [21]

Answer:

Power develop at 6000 ft = 100 - 18 = 82 hp

Given:

Power produced by the engine at sea level = 100 hp

Explanation:

For each 1000 ft rise above the sea level, the power loss of the engine is about 3%

Therefore,

1000 ft - 3% loss

6000 ft - $3\times 6 = 18 %$

At 6000 ft, the power loss is 18% or 18 hp

Now,

Power develop at 6000 ft = Power at sea level - Power loss at 6000 ft

Power develop at 6000 ft = 100 - 18 = 82 hp

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3 years ago

Which of the following vectors is equal to r⃗ AB?

alisha [4.7K]

<h3>Vector AB is equal to vector DC</h3>

<h3>Further explanation</h3>

Vector is a quantity that has a magnitude and direction.

A vector in a cartesian coordinate is represented by an arrow in which the slope of the arrow shows the direction of the vector and the length of the arrow shows the magnitude of the vector.

A position vector of a point is a vector drawn from the base point of the coordinates O (0,0) to that point.

The addition of two vectors can be done in the following ways:

$\overrightarrow {AB} + \overrightarrow {BC} = \overrightarrow {AC}$

A negative vector is a vector with the same magnitude but in opposite direction.

$\overrightarrow {AB} = -\overrightarrow {BA}$

Let's tackle the problem!

Two vectors are equal if they have the same magnitude and direction. In the attached picture, it can be clearly seen that the vector AB has the same magnitude and direction with vector DC. Therefore, vector AB is equal to vector DC.

<h3>Learn more</h3>