PHYSICS MIDDLE SCHOOL

I'm not sure about these 2 questions
I'm not sure about these 2 questions - 1

Answers

Answer 1
Answer: 2) Newton's third law: For every action, there is an equal and opposite reaction.

3) Please provide the diagram 

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Which trasformaron of energy takes place when a slingshot launches a stone ?

Answers

 transformation of energy that takes place when a slingshot launches a stone is elastic potential energy tokinetic energy.

As the polar ice caps melted and the sea level rose more than 300 feet above present day levels. A sharp drop-off that was left behind by this ancient shoreline can now be seen. This sharp drop-off called a ___________________is typically visible when crossed by a river because often there will be rapids or waterfalls. A) Fall Line B) Sand Hills C) Coastal Plain D) Barrier Islands

Answers

Answer:

Option A) Fall Line

Explanation:

A fall line is a geological boundary that is formed between an upland region and a plain beneath. Usually, the regions are identified by falls or rapids when rivers and streams cross or meet.

One interesting feature is that the fall lines are formed when rivers meander through regions of weak rock structure. Normally, the rock structure is sedimentary rock structure (layered). The rivers tear into the earth by erosion, abrasion and attrition.

In addition, plate tectonics play an important role. The movement of the earth's plates causes the falls. Some are formed by the rapid freeze-thawing action of large blocks of ice.

Answer: I need help:(

Explanation:

Can someone help me on 2 science question,this is what they say
1. A teacher challenges.students to study moon phases to determine if what they have learned from the textbook is accurate. How might a student investigate claims made in a textbook that moo. phases occur in a 28-day cycle?
A. observe the phase of the moon each night until a full moon can be seen.
B. Compare the textbook phases to the actual moon phases seen in the night sky each night in 28 days periods over a three month time frame.
C. Compare diagrams of moon phases from the textbook to diagrams of moon phases on-line
D. Observe the moon phases seen in the night sky as often as possible over a six month period.

2. What causes the apperance of the moon change overtime?
A. The orbit of the Earth around the Moon and its distance from the sun.
B.The Moons position relative to the sun and earth as it revolves around sun.
C. the rotation of the moon on its axis
D. The distance of the moon to the sun

thank you

Answers

1. The answer ur question is A.observe the phase of the moon each night until a full moon can be seen.

2.The answer 2 ur secound question is B.The Moons position relative to the sun and earth as it revolves around sun.

Answer:c

Explanation:

a baseball bat is in contact with a ball for 0.02 seconds, and exerts a force of 400 newtons. what is the impulse on the ball?​

Answers

Answer:

I=8 Nw.s

Explanation:

Impulse

It is a physical magnitude that measures the force applied to an object by the time that force is acting. It produces a change in the momentum of the object, which is expressed in the following formula

I=\Delta p=m(v_2-v_1)=F.t

We know the bat applies a force on the ball of F=400 N during t=0.02 sec, thus the impulse is

I=(400) (0.02)=8\ Nw.s

\boxed{I=8\ Nw.s}

Why is an objects density expressed as a combination of two units

Answers

Except for mass, length, time, and electric charge, EVERY quantity is
a combination of units ... of THOSE units in fact.  Hadn't you noticed ?
An objects density is expressed as a combination of two units because the equation for density is Mass/Volume=Density. Therefore, both the mass and the volume retain a unit measure and when they are put together they create an expression that is a combination of two units such as kg/m^3 or g/cm^3. 

A compound mystery.    why is a can of peas an carrots a mixture? what other mixtures can u list

Answers

a can of carrots and peas is a mixture because you can seperate them without chemicals other mixtures can include...
-oil and water
Lemon juice and tea
Honey and tea
Milk and chocolate
Coffee and cream
 Cream and sugar
Coffee and sugar
Cake ingredients Chocolate and water
Cereal and milk
Oatmeal and raisins
Cookie ingredients 
Sand and water
Orange juice and grenadine 
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Sugar and tea
Cinnamon and water
Salt and water
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Mixed drinks (mixer + alcohol)
Tonic water and lime juice
Soda and vanilla syrup
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