PHYSICS MIDDLE SCHOOL

Static cling is an example ofA.
magnetic attraction
B.
covalent bonding
C.
electrical force
D.
adhesion

Answers

Answer 1
Answer: I would say c hope it helps:)
Answer 2
Answer:

Answer:

c

Explanation:

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And object has a velocity of 9 m/s and a mass of 20 kg. What is the kinetic energy of this object

Answers

The kinetic energy of the object which is moving with velocity of 9 m/s and has a mass of 20 kg will be 810 joules.

What is Kinetic Energy ?

The energy possessed by the body by virtue of its motion is called kinetic energy. Mathematically -

E[K] = 1/2mv²

Given is an object that has a velocity of 9 m/s and a mass of 20 kg.

We can calculate the kinetic energy of the object by using the formula discussed above.

Mass [m] = 20 Kg

Velocity [v] = 9 m/s

Substituting the values, we get -

E[K] = 1/2 x 20 x 9 x 9

E[K] = 10 x 9 x 9

E[K] = 81 x 10

E[K] = 810 joules

Therefore, the kinetic energy of the object which is moving with velocity of 9 m/s and has a mass of 20 kg will be 810 joules.

To solve more questions on Kinetic energy, visit the link below-

brainly.com/question/19309255

#SPJ2

Explanation:

k.e =1/2m(v)²

or

k.e=m/2(v)²

so......k.e=20kg/2(9m/s)²

k.e=10kg(81m²/s²)

k.e=10kg(81m²/s²)

k.e=810kgm²/s²

HOPE ITS CORRECT

ANSWER

k.e=810kgm²/s²

Which of these is NOT an example of work? A. Holding a heavy book
B. Pushing a wheelbarrow
C. Lifting weights

Answers

The correct answer is A. Holding a heavy book.

In this case, there is not a displacement of the system and you must remember that work is force times displacement.
the correct answer is actually A

Which of the following has the greatest magnitude?30 Newtons
1 Newton
. 10 Newtons

Answers

Answer:

30 newtons

Explanation:

suface winds on earth are primarily caused by differences in...?

Answers

Surface winds on earth are primarily caused by differences in temperature.
Surface winds are displacements of air, which migrates to regions of high air pressure to pressure points that is less.

1. You are driving south on the 405. You are in traffic so your speed is 35 miles per hour,(35 mi/hr). Calculate your speed in m/sec. Assume that there 1.609 meters in every mile.








2. The Moon takes 27.25 days to make one revolution around the Earth. Calculate how
many seconds it takes for the Moon to make one revolution around the Earth.

Answers

Answer:

1. 15.64 m/s

2. 2,354,400 seconds

Explanation:

1. 1mile is equivalent to 1609metres and 1hour is equivalent to 3600sec.

35mph = (35×1609)/3600

= 56315/3600

= 15.64 m/s

2. Note that 1 day ===> 24hrs

60min ==> 1hr

60sec ===> 1min

Thus 27.25 days = 27.25×24×60×60

= 2,354,400 seconds

A star has a size of 0.1 solar radius. How many times larger is the sun than this star?

Answers

-- The sun's radius is 10 times the radius of that other one.

-- The sun's surface area is 100 times the surface area of that other one.

-  The sun's volume is 1,000 times the volume of that other one.
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