The pressure on a fluid is calculated as force/mass. True False

Answers

Answer 1

Answer: the answer is false..

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An object is moving to the right, and experiencing a net force that is directed to the right. The magnitude of the force is decreasing with time. The speed of the object is:A. increasingB. constant in timeC. decreasing

Answers

Answer:

The speed of the object is increasing.

F = M a as long as the magnitude of the acceleration is acting towards the right there will be an acceleration towards the right

The gravitational force between two objects is F. If masses of both the objects are halved without altering the distance between them, the gravitational force would become: Option a) F/4 Option b) F/2 Option c) 2F Option d) F^2

Answers

Answer:F/4

Explanation:

F1=G M1M2/R^2

F2=G M1M2/4R^2 (1/2*1/2)

F1/F2=G M1M2/R^2 *G M1M2/4R^2

NOW everything gets canceled and we are left with-

F1/F2=4

F1/4=F2

so Option a is right.

a car travels 50 kilometers West and 10 minutes. after reaching the destination the car troubles back to the starting point, again taking 5 minutes. What is the average velocity of the car

Answers

SPEED is

   (distance covered) / (time to cover the distance) .

The car's average SPEED is

      (100 km) / (15min)

=     6-2/3 km per minute.

VELOCITY is

   (distance and direction between start-point and end-point)
divided by
   (time to travel from start-point to end-point).

The car ended up at the starting point, so the distance between
stating-point and end-point is zero.

Velocity = (zero) / (time to travel from start-point to end-point)

    = Zero .

Physical fitness involves the proper functioning of which body systems?Select all that apply.
auditory
circulatory
respiratory
integumentary
muscular
reproductive

Answers

Answer: circulatory

respiratory

muscular

Explanation:

The physical fitness can be define as the state of well being and health. It indicates towards the ability of the organisms to perform various aspects of physical activities such as sports, daily routine work, and occupational tasks. It is achieved by moderate to vigorous physical exercises, sufficient amount of rests and proper nutrition.

The physical fitness involves the proper functioning of the vital systems of the body these includes the respiratory, circulatory and muscular. As the body performs exercise it requires more amount of oxygen also the muscles performing activity deprive of the oxygen, the rate of respiration increases, more amount of blood is pumped out by the heart to fulfill the need of oxygen.

Respiratory
Circulatory
Muscular

A 7.5 kg block is placed on a table . If it's bottom surface area is 0.6m2 how much pressure does the block exert on the table top?

Answers

Pressure is defined as the force per unit area. This measurement is more convenient to use for describing a force exerted. The standard unit for pressure is Pascal. For this problem, force is the gravitational pull from the block. Calculations are as follows:

P = F/A where F = mg

F = 7.5 ( 9.81) = 73.6 N

P = 73.6 N / 0.6 m^2 = 122.6 Pa

What is electromagnetic radiation?

Answers

Electromagnetic radiation is a form of energy that is produced by oscillating electric and magnetic disturbance. Visible light is one type of electromagnetic radiation. Like X-rays and infrared lights which are visible to human eyes.

the transfer of energy by electromagnetic waves traveling through matter or across space

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