PHYSICS HIGH SCHOOL

Why does the weight of water pulls the central part of the surface down?

Answers

Answer 1

Answer:

Answer:

Buoyancy or Upthrust

Explanation:

This is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object.

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A corvette can accelerate during high speeds at about 2.0 m/s2. At this rate how long does it take the car to accelerate from 80 km/h to 160 km/h? Answer in seconds. Round to two decimal places.

Answers

Answer:

11.11 s

Explanation:

Given:

u = 80 km/h = 22.22 m/s

v = 160 km/h = 44.44 m/s

a = 2.0 m/s²

Find: t

v = u + at

44.44 m/s = 22.22 m/s + (2.0 m/s²) t

t = 11.11 s

What does the term equilibrium refer to?

Answers

It depends on what subject but usually it means the balance. In physics, it would be when (for example) the forces acting on an object are equal and the object is therefore in equilibrium. In Biology it would be the balance of the conditions of the body, water levels for example.

Answer:the resting position of the wave

Explanation:

Each of 100 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 100 N. What is the tension in the string connecting block 100 to block 99? What is the tension in the string connecting block 50 to block 51?

Answers

We have that for the Question "What is the tension in the string connecting block 100 to block 99? What is the tension in the string connecting block 50 to block 51?"

it can be said that

The tension in the string connecting block 100 to block 99 = $1N$

The tension in the string connecting block 50 to block 51 = $50N$

From the question we are told

Each of 100 identical blocks sitting on a frictionless surface is connected to the next block by a massless string. The first block is pulled with a force of 100 N.

Assuming mass of each block is 1 kg

The equation for the force is given as

$F = ma\n\na = (F)/(m)\n\n = (100)/(100*1)\n\n = 1 m/s^2$

Now, between block 100 and 99,

$F = ma\n\nF = 1*1 \n\n= 1 N$

Now between block 50 and 51. There are 50 blocks behind 51 st block, so,

$m = 50 Kg\n\na = 1 m/s2 (assuming all blocks accelerate at same rate)\n\nF = 50 * 1\n\nF= 50 N$

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Answer:

The tension in the string connecting block 50 to block 51 is 50 N.

Explanation:

Given that,

Number of block = 100

Force = 100 N

let m be the mass of each block.

We need to calculate the net force acting on the 100th block

Using second law of newton

$F=ma$

$100=100m* a$

$ma=1\ N$

We need to calculate the tension in the string between blocks 99 and 100

Using formula of force

$F_(100-99)=ma$

$F_(100-99)=1$

We need to calculate the total number of masses attached to the string

Using formula for mass

$m'=(100-50)m$

$m'=50m$

We need to calculate the tension in the string connecting block 50 to block 51

Using formula of tension

$F_(50)=m'a$

Put the value into the formula

$F_(50)=50m* a$

$F_(50)=50*1$

$F_(50)=50\ N$

Hence, The tension in the string connecting block 50 to block 51 is 50 N.

What happens to the acceleration of the rocket if the net force is cut in half?

Answers

Explanation:

Newton's second law of motion says that the net force is equal to the mass times acceleration:

F = ma

If the net force is halved, and the mass stays the same, the acceleration will be halved as well.

F/2 = m a/2

If a car decreases from 35m/s to 25/ms after 15 seconds what is its acceleration

Answers

Answer:

2 m/ s2.

Explanation:

2 m/ s2.

Acceleration = (final speed - initial speed) divided by total time taken.

= (25–15) divided by 5

10 divided by 5 gives an acceleration of 2 metres per second per second.

Which "sphere" does an astronomer most directly study?a. biosphere
b. exosphere
c. geosphere
d. cryosphere E. atmosphere F. hydrosphere

Answers

I would choose B. exosphere. Astronomers study outer space, planets and ect.

Answer:

exosphere

Explanation:

exosphere is space

astronomy is space

Other Questions

A small piece of Styrofoam packing material is dropped from a height of 1.90 m above the ground. Until it reaches terminal speed, the magnitude of its acceleration is given by a = g − Bv. After falling 0.400 m, the Styrofoam effectively reaches terminal speed, and then takes 5.40 s more to reach the ground.(a) What is the value of the constant B?s-1(b) What is the acceleration at t = 0?m/s2 (down)(c) What is the acceleration when the speed is 0.150 m/s?m/s2 (down)

How does ice float on water?

What is the taste of the resulting mixture?

Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals. Which term do scientist use to describe these orbits