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2 years ago

Help me :DD i will mark u brainlist and u will get points and a thank u

Physics

1 answer:

Whitepunk [10]2 years ago

4 0

Answer:

Energy flow is the flow of energy through living things within an ecosystem. All living organisms can be organized into producers and consumers, and those producers and consumers can further be organized into a food chain. Each of the levels within the food chain is a trophic level.

Radiation is energy that comes from a source and travels through space at the speed of light

Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break.

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What is unique about Neptune's discovery?

ale4655 [162]

Answer:

the answer is

B)It was the first planet located through mathematical calculations

7 0

3 years ago

An 8 g bullet leaves the muzzle of a rifle with

Elena-2011 [213]

Answer: 1872 N

Explanation:

This problem can be solved by using one of the Kinematics equations and Newton's second law of motion:

$V^{2}=V_{o}^{2} + 2ad$ (1)

$F=ma$ (2)

Where:

$V=611.9 m/s$ is the bullet's final speed (when it leaves the muzzle)

$V_{o}=0$ is the bullet's initial speed (at rest)

$a$ is the bullet's acceleration

$d=0.8 m$ is the distance traveled by the bullet before leaving the muzzle

$F$ is the force

$m=8 g \frac{1 kg}{1000 g}=0.008 kg$ is the mass of the bullet

Knowing this, let's begin by isolating $a$ from (1):

$a=\frac{V^{2}}{2d}$ (3)

$a=\frac{(611.9 m/s)^{2}}{2(0.8 m)}$ (4)

$a=234013.5063 m/s^{2} \approx 2.34(10)^{5} m/s^{2}$ (5)

Substituting (5) in (2):

$F=(0.008 kg)(2.34(10)^{5} m/s^{2})$ (6)

Finally:

$F=1872 N$

4 0

2 years ago

The free body diagram below represents Silly Sally hanging from a trapeze bar. Sally weighs

Liono4ka [1.6K]

Needs more info on the diagram

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2 years ago

Mention theree disadvantages of friction

inessss [21]

Answer:

Please find the answer in the explanation.

Explanation:

Mention three disadvantages of friction between the parts of a machine

Three disadvantages of friction between the part of a machine are;

1. Friction causes wear and tear of machine parts.

2. Friction generates heat between the part of a machine.

3. Friction reduces the efficiency of a machine.

How does.

1 . oiling

2 using ball bearing

To reduce friction, you need to apply a lubricant. Oil and grease are examples of a lubricant. A lubricant helps to reduce friction by making the surface of the machine parts slippery thereby reducing tear and wear.

Also, friction can be reduced by using ball bearing which will allow the rolling of machine parts.

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2 years ago

If you need some help working through family problems, who would be the best choice to seek it from?

Marrrta [24]

Answer:

counseling psychologist

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3 years ago