14 QUESTIONS ~ 50 POINTS

2 answers:

3 0

2. A. Rubber is a conductor and transfers electricity from the wire.

3. B. Changing tides.

4. B. The fossils may have been moved by man, animals, or Earth's constructive and destructive processes.

5. A. They are produced by drought.

6. C. Stores heredity information.

7. D. Magnets have a set strength , while the strength of an electromagnet can be adjusted.

8. A. Temporary dam.

9. B. Invertebrates.

10. C. Human feces.

11. No answer.

12. A. Gas.

13. C. Increase the number of coils of copper he puts around the nail.

14. A. Sam is correct. It is not a physical change.

15. C. Landslides.

Ierofanga [76]3 years ago

3 0

2. A. Rubber is a conductor and transfers electricity from the wire.3. B. Changing tides.4. B. The fossils may have been moved by man, animals, or Earth's constructive and destructive processes.5. A. They are produced by drought.6. C. Stores heredity information.7. D. Magnets have a set strength , while the strength of an electromagnet can be adjusted.8. A. Temporary dam.9. B. Invertebrates.10. C. Human feces.11. No answer.12. A. Gas.13. C. Increase the number of coils of copper he puts around the nail.14. A. Sam is correct. It is not a physical change.15. C. Landslides

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lara31 [8.8K]

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terry physics pushes a 75kg lab cart so that is accelerates from rest with a velocity of 4.4m/s in 3.1 secounds. what is the for

svetlana [45]

106.5N

Explanation:

Given parameters:

Mass of cart = 75kg

Velocity = 4.4m/s

time taken = 3.1s

Unknown:

Force = ?

Solution:

To solve this problem, we are going to apply newton's second law of motion. The law states that "the acceleration of a body is directly proportional to the force on the body and inversely proportional to the mass".

F = m x a

F = force on body

m = mass of body

a = acceleration of the body

But we know that acceleration is the change in velocity with time of a body;

a = $\frac{change in velocity }{time}$