PHYSICS HIGH SCHOOL

calculate the area that will experience a force of 6000N from liquid exerting pressure of 300Pa. 1kPa=1000Pa

Answers

Answer 1

Answer:

Answer:

$A=20\ m^2$

Explanation:

Pressure

Is a measure of how much force is applied perpendicular over a given area.

It is calculated by dividing the amount of force being applied F by the area over which it is being applied A:

$\displaystyle P=(F)/(A)$

The SI unit for pressure is the Pascal (Pa), equivalent to $1\ Nw/m^2$

A pressure of 300 Pa is being exerted over an area that experiences a force of 6000 N. We are required to calculate the value of the area.

If we know the pressure and the force, we solve the above equation for A;

$\displaystyle A=(F)/(P)$

Substituting the given values:

$\displaystyle A=(6000)/(300)$

$\mathbf{A=20\ m^2}$

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what is the kinetic energy of a 0.50 g insect traveling in a straight line at 5.0m/s? a)6.25J b) 1.25J

What is its characteristic wavelength? [Hint: Recall that the kinetic energy of a moving object is E=12mv2, where m is the mass of the object and v is the speed of the object.]

Answers

Answer:

λ = $1.06 * 10^(-11) m$

Explanation:

Using the De Broglie equation, the characteristic wavelength is given by:

λ = $(h)/(p)$

where

h = Planck's constant = $6.626 * 10^(-34)$ Js.

p = momentum

Momentum, p, can be calculated using:

p = $√(2Em)$

where

m = mass of the electron = $9.11 * 10^(-31)$ kg

E = Energy of the electron = 13.4 keV = $13.4 * 10^3 * 1.6 * 10^(-19)$ J = $2.144 * 10^(-15)$ J

=> p = $\sqrt{2 * 2.144 * 10^(-15) * 9.11 * 10^(-31)}$

p = $\sqrt{3.906 * 10^(-45)}$

p = $6.250 * 10^(-23)$ kgm/s

Therefore, characteristic wavelength, λ, is:

λ = $(6.626 * 10^(-34))/(6.250 * 10^(-23))$

λ = $1.06 * 10^(-11) m$

In physics, the characteristic wavelength is the wavelength associated with an object's kinetic energy. It can be determined using the equations for energy, frequency, and wavelength.

In physics, the characteristic wavelength refers to the wavelength associated with a moving object's kinetic energy. The kinetic energy of an object is given by 1/2mv², where m is the mass of the object and v is its speed.

When an object's kinetic energy is known, we can use the equation E = hf, where E is the energy, h is Planck's constant, and f is the frequency of the wave associated with the object, to find the characteristic wavelength.

The equation is rearranged to solve for f, and then the frequency is used to calculate the wavelength using the formula λ = c/f, where λ is the wavelength and c is the speed of light.

By plugging in the given values of the object's mass and speed, you can determine its characteristic wavelength using these equations.

Learn more about characteristic wavelength here:

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Under what condition is the instantaneous acceleration of a moving body equal to its average acceleration over time?A. only at positive accelerations

B. only at negative accelerations

C. only at zero acceleration

D. only at constant accelerations

Answers

If the acceleration is constant (negative or positive) the instantaneous acceleration cannot be

Average acceleration: [final velocity - initial velocity ] /Δ time

Instantaneous acceleration = d V / dt =slope of the velocity vs t graph

If acceleration is increasing, the slope of the curve at one moment will be higher than the average acceleration.

If acceleration is decreasing, the slope of the curve at one moment will be lower than the average acceleration.

If acceleration is constant, the acceleration at any moment is the same, then only at constant accelerations, the instantaneuos acceleration is the same than the average acceleration.

Constant zero acceleration is a particular case of constant acceleration, so at constant zero acceleration the instantaneous accelerations is the same than the average acceleration: zero. But, it is not true that only at zero acceleration the instantaneous acceleration is equal than the average acceleration.

That is why the only true option and the answer is the option D. only at constant accelerations.

What are the different types of energy stores and what they do?

Answers

Kinetic Energy is found in movement.
Potential Energy is any type of stored energy. It can be chemical, nuclear, gravitational, or mechanical.

Answer:

Stores of energy

kinetic energy.

internal energy.

elastic potential energy.

gravitational potential energy.

electrical energy.

magnetic energy.

Explanation:

sana nakatulong)):

Which explains the greenhouse effect? A.Greenhouse gases like water vapor and carbon dioxide release heat in the atmosphere, thereby radiating heat energy back into space.

B.Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back to the surface.

C.Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space.

D.Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space.

Answers

Since greenhouse gases are a main cause of global warming, so the answer must be B.

Projectile motion is a combination of which two types of motion?

Answers

The correct answer is:

Vertical Free Fall and Constant Horizontal Motion

Explanation:

A projectile proposal is a form of motion confronted by an object or particle that is started near the Earth's surface and transfers along a rounded path under the action of gravity only. The vertical force acts perpendicular to the parallel motion and will not affect it since perpendicular segments of motion are confident of each other. Thus, the projectile travels with a constant horizontal velocity and a descending vertical acceleration.

Vertical Free Fall and Constant Horizontal Motion

The ability/inability to conduct an electrical current is called:a. electrolyte
c. conductivity
b. malleability
d. composition