A mason stretches a string between two points 70 ft apart on the same level with a tension of 20 lb at each end. If the string weighs 0.18 lb, determine the sag h at the middle of the string.

Answer:

It was probably formed by when the particles were pressed together.

Explanation:

Answer:

Formed by particles pressed against each other

Explanation:

Answer:

1.5 x 10¹⁸hz

Explanation:

Given parameters:

Wavelength  = 2 x 10⁻¹⁰m

Unknown:

Frequency   = ?

Solution:

To find the frequency, use the expression below;

  V  = f x wavelength

V is the speed of light = 3 x 10⁸m/s

f is the frequency

Now;

 Insert the parameters

     3 x 10⁸  = 2 x 10⁻¹⁰ x frequency

   Wavelength = [tex]\frac{3 x 10^{8} }{2 x 10^{-10} }[/tex]    = 1.5 x 10¹⁸hz

Answer:

Increases with time via the relationship:

velocity = acceleration * time = g * t

Explanation:

Since the object is falling under the constant acceleration due to gravity, its velocity is increasing with time. Such relationship can be described via the equation:

velocity = acceleration * time = g * t

Where the direction of the acceleration due to gravity (g) (pointing downwards) is in the same direction of that of the object's velocity.

Scientists are choosing to colonize Mars rather than another planet out of curiosity, the potential for humans to provide more in-depth observational research than uncrewed rovers, economic interest in its resources, and the possibility that the settlement of other planets could decrease the likelihood of human extinction.

Colonization requires the establishment of permanent habitats that have the potential for self-expansion and self-sustenance.

To know more about colonization of mars here

https://brainly.com/question/15978350

#SPJ2

Answer:

a rubber band

Explanation:

hope this helps!

Answer:

a rubber band

Explanation:

thank you

Answer:

a)   I = 3.63 W / m² , b)   I = 0.750 W / m²

Explanation:

The intensity of a sound wave is given by the relation

         I = P / A = ½ ρ v (2π f [tex]s_{max}[/tex])²

         I = (½ ρ v 4π² s_{max}²) f²

a) with the initial condition let's call the intensity Io

        cte = (½ ρ v 4π² s_{max}²)

         I₀ = cte s² f₀²

        I₀ = cte 10 6

If frequency is increase f = 2.20 10³ Hz

         I = constant (2.20 10³) 2

         I = cte 4.84 10⁶

let's find the relationship of the two quantities

        I / Io = 4.84

        I = 4.84 Io

        I = 4.84 0.750

        I = 3.63 W / m²

b) in this case the frequency is reduced to f = 0.250 10³ Hz and the displacement s = 4 s or

        I = cte (f s)²

        I = constant (0.250 10³ 4)²

        I = cte 1 10⁶

the relationship

        I / Io = 1

        I = Io

        I = 0.750 W / m²

Answer:

What??? maybe not keep doing what you are doing.

Explanation:

I don't know

Answer:

A

Explanation:

I got it right with that :>

Answer:

Explanation:

The mass of an object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{56}{7} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

8 kg*m/s  (8 kg)

Explanation:

f= 56 N

a= 7 m/s^2

m= ?

m= 56 N / 7 m/s^2

= 8 kg*m/s

(8 kg)

Answer:

it's B for a pe x

Explanation:

Answer: 17.3rad/secs.

Explanation:

Given data:

m = 2.0kg

f = 45N

radius of the disk = 1.5m

Solution:

First we determine the kinetic energy of the the system

= 1/2jw^2 + 1/2m(wR)^2

when the brick falls at wR m/s

= 1/2( j + mR^2)w^2

= 1/2 (1/2MR^2 + mR^2)w^2

Loss in potential energy when the brick drops

= 5rad * 1.5m

= 7.5m

Therefore;

45N * 7.5m = 1/2Iw^2

where;

I = 1/2mr^2

angular speed

w = √4*45*7.5/(2*1.5^2)

= 17.3rad/secs

Answer: 10595 J

Explanation: cK-12 Potential Energy

The gravitational potential energy gained by Sara if she has a mass of 60 kg and the distance of the journey is 18 meters is 10584 Joules.

The potential energy that a huge item has in relation to another massive object due to gravity is known as gravitational energy or gravitational potential energy. When two objects descend toward one another, the potential energy associated with the gravitational field is released (transformed into kinetic energy). Bringing two things farther apart increases the gravitational potential energy.

Given:

The distance of the journey, d = 18 meters,

The mass of Sara, m = 60 kg,

Calculate the potential energy by the following formula,

PE = m × g × d

Here, PE is the potential energy and g is gravitational acceleration,

Substitute the values,

PE = 60 × 18 × 9.8

PE = 10584 Joules

Therefore, the gravitational potential energy gained by Sara if she has a mass of 60 kg and the distance of the journey is 18 meters is 10584 joules.

To know more about gravitational potential energy:

https://brainly.com/question/19768887

#SPJ6

Answer:

Conditions for Superconductivity

The material must be cooled below a characteristic temperature, known as its superconducting transition or critical temperature (Tc). ... The magnetic field to which the material is exposed must be below a characteristic value known as the critical magnetic field (Hc).

Answer:

true

Explanation:

Answer:

Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz.

Explanation:

Answer:

It can apply a greater output force over a greater distance compared to the input force and distance.

Explanation:

A machine helps to multiply force input and makes it easier to do work. Simple and complex machines are need to make work easier.

Answer:

C. It can apply a greater output force over a greater distance compared to the input force and distance.

Explanation:

Answer:

25%

Explanation:

use F=mg

then use the answer you get from that and plug it into W=Fxh

take that answer and divide it by 400 J and multiply by 100

round to sig figs

Answer:

I think D??

Explanation:

Answer:

the rock breaks down when the wind blows particles of sand against it.

Explanation:

because the sand can easily be decomposed and temperature easily accessible to it cause line of weaknesses of the rock to break down

Answer:

According to the scientific theory of atoms, which of the following statements best describes the location of electrons? answer choices. in the nucleus of the atom.

Explanation:

Answer: D

Explanation: trust me

Answer:

E.P.E = 1.27 x 10⁻⁴ J = 0.127 mJ

Explanation:

From Law of Conservation Energy, we know that:

Elastic Potential Energy Stored = Gain in Kinetic Energy + Gain in Gravitational Potential Energy

E.P.E = (1/2)mv² + mgh

where,

E.P.E = Elastic Potential Energy = ?

m = mass of flea = 0.1 g = 1 x 10⁻⁴ kg

v = speed = 1.25 m/s

g = 9.8 m/s²

h = height = 5 cm = 0.05 m

Therefore,

E.P.E = (1/2)(1 x 10⁻⁴ kg)(1.25 m/s)² + (1 x 10⁻⁴ kg)(9.8 m/s²)(0.05 m)

E.P.E = 0.78 x 10⁻⁴ J + 0.49 x 10⁻⁴ J

E.P.E = 1.27 x 10⁻⁴ J = 0.127 mJ

Answer: u failed both sad welp ill try to help

Explanation:

Answer: A

Explanation:

Answer:

The answer is A. It detects any current in the wire.

Explanation:

I took the quiz.

Answer:

It curves inward

Explanation:

Of the choices given it is the only one that makes sense

Considering the concave mirror to be a part of a large sphere and the outer surface polished, we can say it curves inward.

There are three types of mirrors: plain mirrors, convex mirrors, and concave mirrors.

The plain mirrors are the ones which we use in our houses. It has both the sides flat, front and back. With the back end polished to reflect light.

It is obvious that the back end of the mirror must be silvered or polished in order to reflect light.

In the case of concave mirrors, if we consider it a part of a large sphere, then the outer surface is silvered or polished and the inner surface is the surface that is used as a mirror,

So, we can say that a concave mirror curves inward.

Learn more about concave mirrors:

https://brainly.com/question/3359672?referrer=searchResults

Three elements are required to create an electric current: a supply of freely flowing electric charges (electrons), some kind of push to move the charges across the circuit, and a path to carry the charges.

Electrical energy is a type of energy that is related to forces on electrically charged particles and electrically charged particle motion (often electrons in wires, but not always). Electric current and electric potential, which is also known as voltage because it is measured in volts, are delivered via an electrical circuit to provide this energy.

When charged particles and a voltage difference combine, as in static electricity or a charged capacitor, motion (current) is not necessary. Instead, the moving electrical energy is often transformed into another kind of energy.

To know more about electrical energy :

https://brainly.com/question/16182853

#SPJ2

Answer:

ALUMINUM ITS ALUMINUM BRO

Explanation:

Answer: ok, so there should be no speed at the 5th second but there was somehow it was the car fault

∞ω∞