PHYSICS HIGH SCHOOL

The core muscles stabilize and protect the spine.

Answers

Answer 1
Answer: True. yes the core muscles stabilize and protect the spine.
Answer 2
Answer:

the answer will be true

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Newtons third law of motion is also known as the law of ?
A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the force of gravity acting on the block (the weight) in water?

Farmer Wilcox wants to reduce the wind velocity near his farm. He should _____.add dead leaves to his fields
cut down trees surrounding his fields
plant trees around the perimeter of his fields
irrigate his fields during dry seasons and droughts

Answers

Answer: Option (c) is the correct answer.

Explanation:

In order to reduce the velocity of wind there should be some placed some barrier near the field. So that when fast moving wind strikes at the surface of barrier then its speed will decrease.

Therefore, the farmer Wilcox should plant trees around the perimeter of his fields which will act as a barrier to the fast moving winds.
plant trees around the perimeter of his fields

a train travels 150 km in the same time that a plane travels 400 km. if the rate of the plane is 20 km per hour less than three times the rate of the train, find both rates

Answers

Answer:

Speed of train =  60 km/hr

Speed of plane = 160 km/hr

Explanation:

We can construct the following equations from the given information:

Speed of train * time = 150                                              -Equation 1

Speed of plane * time = 400                                           -Equation 2

Speed of plane = (3 * Speed of train) - 20                      -Equation 3

We can solve these three simultaneous equations for the three variables (speed of train , speed of plane, time).

Substituting within Eq. 1 and Eq. 2 we get:

Speed of plane * 150 = 400 * Speed of train   -Equation 4

Finally, solving Eq. 4 and Eq. 3 simultaneously we get:

Speed of train =  60 km/hr

Speed of plane = 160 km/hr

The si unit of work is called

Answers

The SI unit of work is known as the joule which is represented by J.

Magma appears to be rising underneath the mid-oceanic ridges.
a. True
b. False

Answers

the answer is true .......

A car travels 10 miles East in 30 minutes. What is its velocity in miles per hour?

Answers

30min=30/60hr=0.5hr

velocity=distance/time=10mile/0.5hr=20 miles per hour East

There are 60 minutes in an hour so 30 minutes is 0.5 hour.

Velocity is equal to displacement / time

= 10 miles East / 0.5 hour

= 20 miles per hour East

Who was the 1st to use film in intraoral radiography?

Answers

The first dental x-ray film was used by Dr. Frank Vanwoert.
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