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natima [27]
3 years ago
7

Density is a property of matter that relates

Physics
1 answer:
tiny-mole [99]3 years ago
7 0
Density is the mass of a substance per unit volume.
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A 25 N force stretches a spring 280 cm. What was the spring constant? ​
boyakko [2]

Answer:

  1. F= 25N
  2. ∆l=280cm
  3. K=?
  4. you apply the formula = K:F/∆l
  5. = 0,089N/cm
4 0
2 years ago
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Per person, the energy consumption in the United States is about 3.3 × 10^8 Btu/yr. This is equivalent to a power of:________. A
zhuklara [117]

Answer:

3.3\times 10^8\ btu/yr=11\ kW

Explanation:

Btu of British thermal unit is a unit of heat. The relation between btu/year and watts is given by :

1\ btu/yr=3.343\times 10^{-5}\ W\\\\3.3\times 10^8\ btu/yr=3.343\times 10^{-5}\times 3.3\times 10^8\ W\\\\3.3\times 10^8\ btu/yr=11031.9\ W\\\\3.3\times 10^8\ btu/yr=11\ kW

So,  3.3\times 10^8\ btu/yr is equal to 11 kW. Hence, the correct option is (d).                                                                      

4 0
3 years ago
2 Points
True [87]
The answer is B because the pollinators give pollen from the plant
8 0
3 years ago
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Plants need to....................synthesize
koban [17]

Answer:

nitrogen

Explanation:

because I also had this in exam and I was correct

5 0
2 years ago
You get hit in the head with a baseball as it is falling. What are the action and reaction forces?
german

Answer:

Action: Gravity pulls on the ball.

Reaction: The ball falls to the ground.

Explanation:

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