You apply a force of 500 N to 150 N/m. how much does it stretch? Show the equation you are using, plus the values into the equation, and show the final answer with the units. 3 significant figures.

Answer:

27.95[kW*min]

Explanation:

We must remember that the power can be determined by the product of the current by the voltage.

\(P=V*I\)

where:

P = power [W]

V = voltage [volt]

I = amperage [Amp]

Now replacing:

\(P=110*8.47\\P=931.7[W]\)

Now the energy consumed can be obtained mediate the multiplication of the power by the amount of time in operation, we must obtain an amount in Kw per hour [kW-min]

\(Energy = 931.7[kW]*30[days]*10[\frac{min}{1day} ]=279510[W*min]or 27.95[kW*min]\)

Answer:

48 m/s - 16 m/s = 32 m/s

(32 m/s )/ (8 s) = 4 m/s²

Answer:

t = 1400 s

Explanation:

Given that,

Distance covered, d = 350 km = 350000 m

Speed of the object, v = 25 m/s

We need to find the time it takes to do that. Let the time is t. The formula for the speed of an object is given by :

v = d/t

i.e.

\(t=\dfrac{d}{v}\)

Putting all the values,

\(t=\dfrac{350000}{25}\\\\=1400\ s\)

So, the time taken by it is 1400 seconds.

Answer:

Heat transfer is an exchange of thermal energy between two objects. The rate of heat transfer depends upon the temperatures of each entity and the medium through which the thermal energy is being transferred. In cooking, heat transfer refers to heating your food items through a cooking appliance, such as a stove, fryer, microwave, or oven.

Explanation:

I hope it helps

Answer:

Convection

Convection is heat transfer by mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it. Convection above a hot surface occurs because hot air expands, becomes less dense, and rises (see Ideal Gas Law).

Explanation:

hope this helps:-)

Answer:

Iron and lead generally have low specific heats.

Answer:

\(P_b = \frac{\rho_b}{\rho_a} \ P_a\)

Explanation:

The pressure at a depth of a fluid is

       P = ρ g y

where ρ is the density of the fluid, y the depth of the gauge measured from the surface of the fluid.

In this case the pressure for fluid A is

      Pa = ρₐ g y

the pressure for fluid B is

      P_b = ρ_b g y

depth y not changes as the gauge is stationary

if we look for the relationship between these pressures

       \(\frac{P_a}{P_b} = \frac{ \rho_a}{\rho_b}\)

        \(P_b = \frac{\rho_b}{\rho_a} \ P_a\)

therefore we see that the pressure measured for fluid B is different from the pressure of fluid A

if  ρₐ < ρ_b B the pressure P_b is greater than the initial reading

   ρₐ>  ρ_b the pressure in B decreases with respect to the reading in liquid A

Answer:

30.81°

Explanation:

Angle of refraction= sin⁻¹ 0.5122 = 30.81°.

Hope this helped!

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Answer: B. Green

Explanation:

        Since the object absorbs all the other options listed here, it will reflect green light. This makes the object appear green to our eyes.

        Blue (A), indigo (C), and red (D) are listed in red, orange, yellow, blue, indigo, and violet. Green is not, so this is our answer.

     Fun fact:

An example of this is grass!

Answer:

green

Explanation:

After time t, the position function of the ball is determined as \(y(t) = h_0\ +\ v_0t \ - \ \frac{1}{2} gt^2\)

The given parameters;

The position function of the ball after time t, is calculated as follows;

\(y(t) = h_0\ +\ v_0t \ - \ \frac{1}{2} gt^2\)

The negative sign of acceleration of due to gravity is because the ball is moving upward against gravity.

Thus, after time t, the position function of the ball is determined as \(y(t) = h_0\ +\ v_0t \ - \ \frac{1}{2} gt^2\)

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Answer:

F = 172 N

Explanation:

Newton's second law of motion gives the amount of force acting on an object. Mathematically, it is given by :

F=ma

Put m =86 kg and a = 2 m/s²

So,

\(F=(86\times 2)\ N\\\\F=172\ N\)

Hence, the net force is 172 N.

Explanation:

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\(pls \: write \: in \: english\)

\(then \: only \: i \: can \: answer \: u\)

\(otherwise \: sry\)

The radii of the first five Fresnel zones is 3.6 mm.

Distance from the light source to the wave surface, d₁ = 1 m

Distance from the wave surface to the observation point, d₂ = 1 m.

Wavelength of the light used, λ = 5 x 10⁻⁶m = 5 μm

The expression for the radius of the Fresnel zones is given by,

rₙ = √[nλd₁d₂/(d₁ + d₂)]

Therefore, the radii of the first five Fresnel zones is,

r₅ = √[5 x 5 x 10⁻⁶x 1 x 1/(1 + 1)]

r₅ = √(25 x 10⁻⁶/2)

r₅ = 3.6 x 10⁻³m

r₅ = 3.6 mm

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To model the discovery of electromagnetic induction, Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Electromagnetic induction refers to the phenomenon of generating an electric current in a conductor by varying the magnetic field passing through it. This concept was discovered by Michael Faraday in the early 19th century. To model this discovery, Tonya needs to recreate the conditions that led to this breakthrough.

In Faraday's experiment, he observed that when a magnet is moved into or out of a coil of wire, it induces an electric current in the wire. This occurs when the magnetic field passing through the coil changes. Therefore, Tonya should use a similar setup to replicate this process.

Out of the given options, the most appropriate procedure for Tonya would be to move a magnet into a coil of wire in a closed circuit. By having a closed circuit, it means that the ends of the wire are connected to form a complete loop. When the magnet is moved into the coil, the changing magnetic field induces an electric current to flow through the wire.

This procedure demonstrates the principle of electromagnetic induction and shows how a changing magnetic field can produce an electric current. It allows Tonya to visually observe the effects of the induced current, which is essential in modeling the discovery of electromagnetic induction.

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The angular velocity is 3.75 m/s and the centripetal force is 225 N respectively.

The angular velocity of an object with respect to some extent is a degree of the way rapid that item actions through the point's view, within the feel of the way speedy the angular function of the item modifications. An instance of angular pace is a ceiling fan. One blade will whole a complete round in a certain amount of time T, so its angular speed with respect to the middle of the ceiling fan is twoπ/T.

Calculation:-

A. angular velocity ω = v/r

                                     = 30 /8

                                      = 3.75 m/s

B. Centripetal force = mv²/r

                             = 2×30²/8

                              = 225 N

There are 3 formulations we will use to find the angular velocity. the primary comes instantly from the definition. The angular pace is the rate of alternate of the position attitude of an object with respect to time, so w = theta / t, in which w = angular pace, theta = position attitude, and t = time.

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Answer:

The correct answer is - 6.49 × 10^3 mm.

Explanation:

The correct scientific notation of the given subtraction problem is:

6.94 × 10^3 mm - 4.5 × 10^2 mm = _____.

The correct number of significant digits is

a. 6.94 × 10^3 mm = 3

b. 4.5 × 10^2 mm = 2

So subtracting the 6.94 × 10^3 mm - 4.5 × 10^2 mm

= 6940 - 450

= 6.49× 10^3 mm.

Answer:

6.5x 10^3 mm

Explanation:

Using the division operation, the number of tubes gotten by each patient can be obtained by dividing 20 by 5. Hence, each patient will get 4 tubes of solution.

Tubes of solution received :

Total tubes received :

Number of tubes of solution gotten by each patient :

Tubes of solution per patient = (20 ÷ 5) = 4 tubes

Therefore, each patient will get 4 tubes of solution.

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Answer:

Explanation:

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

\(m = \frac{f}{a} \\ \)

f is the force

a is the acceleration

From the question we have

\(m = \frac{2000}{15} = \frac{400}{3} \\ = 133.3333\)

We have the final answer as

Hope this helps you

The time the force was applied to the obeject of mass 0.4 kg is 12 seconds

Impulse is the product of force and time.

To calculate how long the force was applied, we use the formula of impulse.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1 and solve for t

Hence, the time is 12 seconds

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From the calculations, the power developed is 337.5 W.

First we must obtain the acceleration from;

v = u + at

u = 0 m/s because the motion started rom rest

v = at

a = v/t

a = 12 m/s/ 1.6 s

a= 7.5 m/s^2

The force is obtained from;

F = ma = 7.5 kg * 7.5 m/s^2 = 56.25 N

Now the distance covered is obtained from';

v^2 = u^2 + 2as

v^2 = 2as

s = v^2/2a

s = (12)^2/2 *  7.5

s = 9.6 m

Now;

Work = Fs = 56.25 N *  9.6 m = 540 J

Power expended =  540 J/ 1.6 s = 337.5 W

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The direction of the given vector B of 18.6 m that is 80° left of the positive y-axis is 170°

Angle of the vector made with positive y-axis = 80°

Angle between positive x and y axis = 90°

Direction of B, θ = 90° + 80°

θ = 170°

Direction of a vector is the angle of the vector that is made with positive x-axis. A vector with a certain direction of certain degrees means that the vector is rotated that much degrees in counter-clockwise direction relative to positive x-axis.

Therefore, the direction of the vector B is 170°

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Answer:

The answer is D.

Explanation:

A Hypothesis is what they think is gonna happen or n educated guess. An opinion is someone's point of view on something. A theory is an idea intended to explain something. Evidence is an object you collect to find out something and it helps support your research. Evidence matches your question best.

The following would expect to be a strong electrolyte in solution (b) KCI is correct option.

When dissolved in water, a strong electrolyte produces a large concentration of ions in solution by totally dissociating into ions.  The following compounds are typically strong electrolytes in solution according to this definition:

These substances readily dissociate into ions in water and exhibit high electrical conductivity, making them strong electrolytes in solution.

Therefore, the correct option is (b).

The complete question is,

Which of the following would be a strong electrolyte in solution?

a) Al(OH)₃ b) KCI c) Pbl₂

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Answer:

\(v_{1} = 19 m/s\)

Explanation:

\(v_{1} = \frac{(v_{2} + u)}{2}\), where \(v_1\) = avg. velocity, \(v_2\) = final velocity, and \(u\) = initial velocity.

Answer:

v₀ = 14.6 m / s

Explanation:

This is a projectile launch exercise, in this case we must stop the wall, we can assume that at this point the ball is at its maximum height

as the height is maximum its vertical speed is zero

         v_{y} = \(v_{oy}\) - g t

          y = v_{oy} t - ½ g t²

the horizontal distance is

          x = v₀ₓ t

we use trigonometry to find the components of the velocity

          sin θ = v_{oy} / v₀

          cos θ = v₀ₓ / v₀

          v₀ₓ = v₀ cos θ

          v_{oy} = v_{o} sin θ

we substitute the values

           0 = v₀ sin θ - g t

         10 = v₀ sin θ t - ½ g t²

           6 = v₀ cos θ t

we have three equations and three unknowns by which the system can be solved

let's use the first and second equations,

       10 = (gt) t - ½ g t²

       10 = g t² - ½ g t²

       10 / 9.8 = t² (1- ½)

        1.02 = ½ t²

         t = √ 2.04

         t = 1,429 s

this is the time to hit the wall

now let's use the first and third equations, we substitute the data

          v₀ sin θ = g t

          v₀ cos θ = x / t

we divide and simplify

           tan θ = g t² / x

           θ = tan⁻¹ g t² / x

           θ = tan⁻¹ (9.8 1.429²/6)

           θ = 73.3°

we substitute in the third equation

          x = v₀ cos 73.3   t

          v₀ = x / t cos 73.3

          v₀ = 6 / (1.429 cos 73.3)

          v₀ = 14.6 m / s

Answer:

Final speed after 2 seconds = 34.6 m/s

Explanation:

Given:

Initial speed of coin (u) = 15 m/s

Time taken = 2 seconds

Find:

Final speed after 2 seconds

Computation:

Gravitational acceleration of earth = 9.8 m/s²

Using first equation of motion;

v = u + at

or

v = u + gt

where,

v = final velocity

u = initial velocity

g = Gravitational acceleration

t = time taken

v = 15 + 9.8(2)

v = 15 + 19.6

Final speed after 2 seconds = 34.6 m/s

Size of the image 0.4cm

Distance u =−30cm

Height h = 2cm

Radius of curvature R = 10cm

We know that,

-f  = R/2 = 10/2 = -5 cm

Now, using the mirror’s formula

1/f = (1/v) + (1/u)

-1/5 = (1/v) - (1/30)

v = 6cm

Now, the magnification is

m = -v /u = -6 / -30 =  0.2

We know that,

m = h`/h

0.2 = h`/2

he = 0.4 cm

Optics is the branch of physics that studies the behaviour and properties of light, including its interaction with matter and the structure of instruments that use or detect it. Optics typically describes the behaviour of visible, ultraviolet and infrared light.

Three main branches of optical science

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Answer:No

Explanation:Because car use the energy produced by the car battery and humans get energy from the food they eat