please help, 1 question, brainliest if you get it right! please only answer if you know.

thanks!

Answer:

3 m/s

Explanation:

Kinetic energy of a body is given by the formula [tex]K= {1\over2} m v^2[/tex]. Let's replace everything we have and solve for what's left.

[tex]1125J = {1\over2}\cdot 250 kg \cdot v^2[/tex]

[tex]v^2 ={ 1125 \cdot 2 \over 250}}[/tex] or [tex]v= 3 {m \over s}[/tex]

Answer:

If you hold a hot glass tumbler under cold water, it will crack

Explanation:

This is because the outer surface of the glass comes in direct contact with cold water and contracts more compared to the inner surface.

This is one example I know.

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The Correct choice is ~

D. 18.0 Newtons

because the resultant force can't exceed 16 Newtons ~

Answer:

I don't know...

I'm sorry

The motion or path of the tennis ball is the path of a projectile, which has

both vertical and horizontal motion.

The total horizontal distance traveled by the tennis ball during the entire

time it is in the air ≈ 16.514 meters.

Reasons:

The given parameters are;

The direction in which the ball is launched = 45°

The initial vertical velocity of the ball, [tex]v_y[/tex] = 9.0 m/s

The initial horizontal velocity of the ball, vₓ = 9.0 m/s

The time it takes the ball to reach the maximum height, t = 0.92 seconds after its launch

The total horizontal distance traveled, by the tennis ball is given by the formula;

[tex]\Delta d_x = \dfrac{v_1^2 \cdot \left( 2 \cdot cos(\theta) \sin(\theta)}{y} = \dfrac{2 \times v_x \times v_y}{g}[/tex]

Which gives;

[tex]\mathrm{The \ total \ distance \ travelled, \ \Delta} d_x = \dfrac{2 \times 9.0\times 9.0}{9.81} \approx 16.514[/tex]

The total horizontal distance traveled by the tennis ≈ 16.514 meters

Learn more here:

https://brainly.com/question/14892195

Answer:

Sorry

Explanation:

I really don't know what to say about this question I am not sure what to say about this

First and foremost, starlight appears less distorted in the thin atmosphere on mountaintops. At high altitudes, there is less atmosphere to absorb infrared energy, which reveals details about some of the coldest objects in the universe, such as clouds of gas and dust and the disks of dust that give birth to planets.

Answer:

air and water

Explanation:

The matter through which a mechanical wave travels is called the medium (plural, media). There are three types of mechanical waves: transverse, longitudinal, and surface waves. They differ in how particles of the medium move when the energy of the wave passes through. The particles in a medium become disturbed and pass on this disturbance to the next one, and so on. So, the disturbance caused by the particles can travel through a medium such as air, ocean water, land, violin strings, Slinky coils, etc. Sound waves can travel through solids, liquids, or gases.

(A magnetic compass does not point to the geographic north pole. A magnetic compass points to the earth's magnetic poles, which are not the same as earth's geographic poles. Furthermore, the magnetic pole near earth's geographic north pole is actually the south magnetic pole. When it comes to magnets, opposites attract.)

Hi there!

(A)

When the rock reaches the peak, it will have a vertical velocity of 0 m/s. We can use the equation:

vf = vi + at

vf = final velocity (0 m/s)

vi = initial velocity (2 m/s)

a = acceleration (in this situation, due to gravity = 9.8 m/s²)

t = time (s)

0 = 2 + (-9.8)t

2/9.8 = t = .204 sec

(B)

Use the equation:

d = vit + 1/2at²

d = 2(.204) + 1/2(-9.8)(.204²)

d = .204 m

The book's initial speed = 2.83 m/s

The mass of the textbook, m = 0.75 kg

The final speed of the textbook, v = 0 m/s (Since it comes to rest)

The distance covered by the book, d = 1.2 m

Coefficient of kinetic friction, [tex]\mu = 0.34[/tex]

The frictional force between the table and the book is calculated as:

[tex]f_k=-\mu mg\\\\ f_k=-0.34 \times 0.75 \times 9.8\\\\f_k=-2.499N[/tex]

The workdone by the textbook is calculated as:

[tex]W = Fd\\\\W=2.499(1.2)\\\\W=2.9988J[/tex]

According to the work-kinetic energy theorem:

Workdone by the book = Change in Kinetic energy

[tex]W = 0.5m(v^2-u^2)\\\\-2.9988=0.5 \times 0.75 \times (0^2-u^2)\\\\-2.99988=-0.375u^2\\\\u^2=\frac{-2.9988}{-0.375} \\\\u^2=7.9968\\\\u=\sqrt{7.9968}\\\\u=2.83m/s[/tex]

The book's initial speed = 2.83 m/s

Learn more here: https://brainly.com/question/25459845

Answer:

C

Explanation:

C is i thing

We employed the pressure P formulas. the reading of the balance when the body is;

a. In air = 29.4 N

b. Fully immersed in water = 3.9 N

c. ⅓ immersed in water = 20.9 N

d. Fully immersed in paraffin = 3.1 N

Given that a body of mass 3kg and volume 4×10^-4m^3 is hung from balance graduated in newtons. To know the reading of the balance when the body is;

a. In air

b. Fully immersed in water

c. ⅓ immersed in water

d. Fully immersed in paraffin.

We will employ the pressure P formulas.

P = F/A

and

P = ρgh

Where

ρ = density

g = acceleration due to gravity

h = height

F = force

A = area

F/A = ρgh

Cross multiply

F = ρghA

Where hA = Volume V

Therefore, F = ρgV

a. In air

F = mg

F = 3 x 9.8

F = 29.4 N

b. Fully immersed in water

F = ρgV

F = [tex]10^{3}[/tex] x 9.8 x 4 x [tex]10^{-4}[/tex]

F = 3.92 N

c. ⅓ immersed in water

F = (ρgV)/3 + 2/3(mg)

F = 3.92/3 + (2/3 x 29.4)

F = 1.3067 + 19.6

F = 20.9N

d. Fully immersed in paraffin.

F = ρgV

F = 800 x 9.8 x 4 x [tex]10^{-4}[/tex]

F = 3.136 N

Learn more here: https://brainly.com/question/24152700

Answer:

It is a renewable resource as it renewably heats up water to a high temperature. Geothermal energy is more environmentally friendly than conventional fuel sources such as coal and other fossil fuels. In addition, the carbon footprint of a geothermal power plant is low.

Disadvantages: If dug deep underground, it can cause earthquakes. generates waste, reservoirs require proper management, it's location-specific, has high initial cost

Answer:

Mechanical energy is the ordered movement of the molecules as a single unit. Thermal energy is the random movement of the molecules. Mechanical energy can be 100% converted to thermal energy, but thermal energy cannot be fully converted to mechanical energy.

Answer:

F=10,000N

Explanation:

F=ma

m=5000kg

a=2m/s^2

[tex]F=(5000kg)*(2m/s^{2} )\\\\\\\\F=10000N[/tex]

Answer:

[tex]\boxed {\boxed {\sf 10,000 \ Newtons}}[/tex]

Explanation:

We are asked to find the force of Annabella's car when it hits a tree.

According to Newton's Second Law of Motion, force is the product of mass and acceleration.  Therefore, it is calculated using the following formula:

[tex]F=ma[/tex]

The mass of the car is 5000 kilograms and the acceleration is 2 meters per second squared.

Substitute the values into the formula.

[tex]F= (5000 \ kg)(2 \ m/s^2)[/tex]

Multiply.

[tex]F= 10,000 \ kg*m/s^2[/tex]

Convert the units. 1 kilogram meter per second squared is equal to 1 Newton, so our answer of 10,000 kg*m/s² is equal to 10,000 Newtons.

[tex]F= 10,000 \ N[/tex]

Annabella's car hits the tree with a force of 10,000 Newtons.

Answer: Dispersion

Explanation:

Answer:

45555555555555555555

Explanation:

Answer:

735 N

Explanation:

Answer:

thermal energy

Explanation:

Answer:

Every Sentra is powered by a 149-hp 2.0-liter four-cylinder engine that pairs with a continuously variable automatic transmission (CVT) and front-wheel drive.

Explanation:

Answer:

I am really sorry but I can't understand the question.

Can you translate the question to English?

Explanation:

Answer:

The movement, or a tendency to move, toward a center of gravity, as in the falling of bodies to the earth is called gravitation

Answer:

Refraction

Explanation:

Reflection involves a change in direction of waves when they bounce off a barrier.

Refraction of waves involves a change in the direction of waves as they pass from one medium to another.

Please mark as brainliest if this helps! :)

Answer:

partículas estarían separadas

Explanation:

ya que con el calor las partículas se alborotan y con frío se congelan

Answer:

A few examples.

After 8 hours of classes, you grab the door handle and start pushing on it, harder and harder, not realizing you have to pull. Applied force is how much you can exert on the door, plus the reaction of the frame. net force is zero - the door won't budge.

Indiana Jones, while trying to grab yet another treasure that belongs in a museum, triggered a trap and a sack weighting 600N is pushing over his head. Due to his old age he's not in shape, and he manage to push back with only 500N of force. Applied force is 600N from the weight, and 500N from the archeologist. With a net force of 100N towards the old man head.

Mario and Luigi have ran out of gasoline in their car, so they're stuck pushing. Due to being in peak condition, each one applies 800N to the side of the car, dragging it forward. Applied force is 800N from each plumber, and net force is 1600 N.

Answer:

1) Work is a measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. 2) Work is calculated through joules. 3) It's possible to calculate work by multiplying the amount of force applied by the distance that the force is applied. If we know the amount of force the stick applies to the puck and the distance that the stick is applying the force to the puck, we can figure out the amount of work done.

Explanation:

Hope this helped!- Nya~ :3