3 years ago

What are Earth's mineral resources and how long might reserves last?

Physics

1 answer:

amm18123 years ago

3 0

Reserves might last 53.3 years.

Earth’s mineral resources:

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A car initially at rest undergoes uniform acceleration for 6.32 seconds and covers a distance of 120 meters. What is the approxi

Alja [10]

The approximate acceleration of the car would be <span>3.00

</span>How? We have to use the formula to find the velocity.

v = d/t = 120/6.32

v = 19

Then plug the factor into the acceleration formula to find the acceleration:

a = v/t = 19/6.32

a = 3.00

So, the approximate acceleration of the car would be 3.00

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4 years ago

An arrow is fired vertically upwards by a bow and reaches an altitude of 134 m. Find the initial speed of the arrow on the groun

Verdich [7]

Answer:

Explanation:

Let the initial speed be u . final speed = 0

v² = u² - 2gh

v is final speed , u is initial speed , h is height .

0 = u² - 2g x 134

u² = 2 x 9.8 x 134

u = 51.25 m /s .

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4 years ago

When an 80.0-kg man stands on a pogo stick, the spring is compressed 0.120 m. (a) What is the force constant of the spring? (b)

Nimfa-mama [501]

Answer:

a.6533.333 N/m

b.Yes,the spring will be compressed more when the person hops down the road .

Explanation:

Mass of man=80 kg

Spring compressed by x=0.12 m

a.We have to find the force constant of the spring.

Spring constant= $k=\frac{F}{x}=\frac{mg}{x}$

$g=9.8m/s^2$

Using the formula

Spring constant, $k=\frac{80\times 9.8}{0.12}$ N/m

Spring constant= $k=6533.33 N/s$

b.The spring will be compressed more when the person hops down the road because when the person hops down then the kinetic energy of person will be converted into potential energy during the road hit.

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3 years ago

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the less shielding of electrons

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Did changing the angle of the incline affect the following parameters?

MArishka [77]

Increasing the level of an incline:
Increases final velocity
Increases the work done
Increases the initial potential energy
Increases the final kinetic energy

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4 years ago