PHYSICS MIDDLE SCHOOL

Which of the following is not needed to make a model of the water cycle?

Answers

Answer 1

Answer: grass.. dirt... land things

Answer 2

Answer:

Answer:

The answer is a drain

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Most radiation is released as particles. Identify the type radiation that is not a particle.1.alpha2.beta3.gamma4.positron
If the bug has a mass of 0.05 kg and accelerates at 2 m/s2 whats the net force on the bug
Polaris, the North Star, is almost always visible in the same location because A) it is the brightest star in the sky. B) it is gravitationally attracted to our sun. C) it is the closest star to the earth, besides our sun. Eliminate D) the axis of the earth passes directly through the North Star.

Are metals conductors or insulators?

Answers

All metals are good conductors.
Hope that helped you.

Conductors all metals are btw

Where is the input forcein the use of this simple
machine?
A. The feet planted in the snow
B.
The shovel lifted
C. The gravity pushing down on
the snow
D. The hands on the shovel

Answers

Answer:

the answer is B The shovel lifted

hope it helps!

B. The shovel lifted

I need help with answering the given question.

Answers

The two hydrogen gas molecules split and the two oxygen gas molecules split and made two water molecules by having two hydrogen gas molecules and one oxygen gas molecule join twice...
Therefore, there would be 3 or 6
if i am not mistaken
hope it helps

a 0.45 kg soccer ball changes its velocity by 20.0 m/s due to a force applied to it in 0.10 seconds. what force was necessary for this change in velocity?

Answers

Answer: 90N

Explanation:

Mass of ball = 0.45 kg

Change in velocity = 20.0 m/s

Time = 0.10 seconds

Force required for change = ?

Since force refers to the change in momentum per unit time, hence

Force = Momentum / Time

i.e Force = Mass x (change in velocity / time)

Force = 0.45kg x (20.0m/s /0.10second)

= 0.45kg x (200 m/s^2)

= 90N

Thus, 90N of force was necessary for this change in velocity

A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. what is the lizard average acceleration

Answers

Acceleration = (change in speed) / (time for the change)

change in speed = (ending speed) - (starting speed)

change in speed = (10 m/s) - (2 m/s) = 8 m/s

Acceleration = (8 m/s) / (4 sec)

Acceleration = (8/4) (m/s²)

Acceleration = 2 m/s²

Explain why a magnet from your refrigerator could not be used to life something as heavy as a car ?

Answers

Answer:

Explanation:

because it wouldnt connect

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The mass of a football player who weighs 1250N

What happens to most materials when they are heated?