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alexgriva [62]
3 years ago
7

How much does a 45 kg rock weigh

Physics
1 answer:
bazaltina [42]3 years ago
7 0

Answer:

441.45N

Explanation:

Weight = mass(kg) x acceleration (m/s^2)

Weight = 45kg x 9.81m/s^2=441.45N

Recall that weight =mass of the rock x gravitational force acting on the rock

Therefore, the rock will weigh = 441.45N

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The resistance 2 Ω, 4 Ω and 8 Ω are connected in parallel. Their equivalent
Zigmanuir [339]

Answer:

The answer to your question is the letter B. R = 8/7 Ω

Explanation:

Data

R1 = 2 Ω

R2 = 4Ω

R3 = 8Ω

To calculate the total resistance use the formula

         1/R = 1/R1 + 1/R2 + 1/R3

-Substitution

         1/R = 1/2 + 1/4 + 1/8

- Look for the Greatest common factor

              2   4   8    2

               1   2    4   2

                    1    2   2

                          1

The GCF = 2 x 2 x 2 = 8

-Sum up the fractions

                 1/2 + 1/4 + 1/8 = (4 + 2 + 1) / 8

                                        = 7/8

-Find R

               1/R = 7/8    then, R = 8/7 Ω

3 0
3 years ago
Every surface has different ____________________ of friction.
dedylja [7]

Answer:

amounts

Explanation:

every surface has different amounts of friction

hope this helps :) plz brainliest?

3 0
3 years ago
Which of the following is an example of a SOLUTION?
Mila [183]

Answer:

Salt water

Explanation:

This is the answer

7 0
2 years ago
At the Sun Dagger in New Mexico, a dagger-shaped beam of sunlight pierces a spiral
nadya68 [22]

Answer:

D

Explanation:

At noon on the summer solstice. The sun dagger was used to observe astrological readings in the ancient time

7 0
3 years ago
The 20 or so minerals that make up most of the rocks of earth's crust are know as what
STALIN [3.7K]
Rock-forming minerals because they formed the earths crust
7 0
3 years ago
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