you are given two circuits with two batteries of emf e and internal resistance r1 each. circuit a has the batteries connected in series with a resistor of resistance r2, and circuit b has the batteries connected in parallel to an equivalent resistor.

Newton's second law allows us to find the force applied to the student so that it has an upward acceleration of 27.4 m / s² is:

            F = 1.94 10³ N

Newton's second law says that the force is proportional to the product of the mass and the acceleration of the body.

         ∑ F = m a

Where F is the force, m the mass and the acceleration of the body.

A free body diagram is a diagram of the forces without the details of the bodies, in the attachment we have a free body diagram of the system.

They indicate that the student's mass is 52.1 kg and his acceleration is 27.4 m / s², let's write Newton's second law.

           F - W = ma

            F = m a + W

Body weight is.

            W = mg

            F = m (a + g)

We calculate.

            F = 52.1 (27.4+ 9.8)

            F = 1.94 10³ N

In conclusion using Newton's second law we can find the force applied to the student is:

            F = 1.94 10³ N

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Answer:

Below

Explanation:

To find the frequency of a wave you can use this formula :

     f = v / λ

     f = 340m/s / 0.5m

     f = 680 Hz

Hope this helps!

Answer:

F = 1200 N

General Formulas and Concepts:

Forces

Newton's Second Law of Motion: F = ma

Explanation:

Step 1: Define

Identify variables

m = 300 kg

a = 4 m/s²

Step 2: Find Force

Topic: AP Physics 1 - Algebra Based

Unit: Forces

Answer:

because it's discovered by Galileo Galilei

Answer:

Hello how are you ^0^

Explanation:

because it's discovered by Galileo Galilei

hope it's help you (^0^)

Answer:

Characterization is the process by which the writer reveals the personality of a character. Characterization is revealed through direct characterization and indirect characterization. Direct Characterization tells the audience what the personality of the character is.

Hi there!

On a horizontal circular track with friction, the net force acting in the horizontal direction is:

∑F = Fκ, or the force of kinetic friction.

We know that ΣF = Mv²/r, so:

Mv²/r = Fκ

Plug in the given values to solve:

(1750)(35²)/80 = Fκ

Thus:

Fκ = 26796.875 N

Answer:

13.73 degrees farenheit

-10.15 degrees Celsius

Explanation:

hope this helps

Answer:

this is just a guess bc i only looked at it for 5 seconds but i think 150 m/s

ITS TURE.When there is no torque acting on a body, its angular momentum is constant. Net force changes momentum, while net torque changes angular momentum.

Answer: false

Explanation:

The greatest acceleration that the elevators motor can produce without breaking the cable is 5 m/s².

The given parameters;

The total mass the elevator can support;

M = 500 kg + 20(75 kg)

M = 2000 kg

The greatest acceleration that the elevators motor can produce without breaking the cable occurs when the elevator is moving upwards;

T = M(a + g)

[tex]2.96 \times 10^4 = 2000 (a + 9.8)\\\\2.96 \times 10^4 = 2000a + 19600\\\\29600 - 19600 = 2000a\\\\10,000 = 2000a\\\\a = \frac{10,000}{2000} \\\\a = 5 \ m/s^2[/tex]

Thus, the greatest acceleration that the elevators motor can produce without breaking the cable is 5 m/s².

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Answer:

Avg speed

[tex] \frac{dp}{dt } = \frac{5 - 4}{12 - 0} = \frac{1}{12} m \: per \: s[/tex]

avg velocity

[tex] \frac{5}{4} m \: per \: s[/tex]

Hi there!

Average speed = Distance / time

From the previous question, distance = 17m, so:

Speed = 17/12 ≈ 1.417 m/s

Average velocity = DISPLACEMENT/ time

Displacement = 1m, so:

Average velocity = 1/12 ≈ 0.083 m/s

Answer:

False

Explanation:

You could weigh less on the moon then on Earth because the moon has a smaller gravitational force compared to Earth.

Answer:

When two surfaces slide against each other, a force called friction makes them stick very slightly together. Smooth surfaces, like ice and glass, are easy to slide over

Explanation:

They create very little friction. Rough surfaces like rock and sand create much more friction, and are easy to grip on to.

Hello There!

Smooth Surfaces are easier to slide over. That's true.

Take an object and slide it across a rough surface. Now, slide the same object across a smooth surface.

What do you see?

I expect you wil find out that smooth surfaces are easier to slide over.

Reason:

Smooth surfaces have less friction than rough ones.

Hope it helps!

Answer:

Water is a liquid at standard temperature and pressure (25 degrees Celsius and 1 atm, for liquids). Water is is tasteless and odorless.

Explanation:

At the bottom left,

Increasing potential energy.

At ascending,

Increasing kinetic energy.

At the peak,

Greatest potential energy.

At the descending,

Greatest kinetic energy.

Answer:

0.75m

Explanation:

V=FX

3×10^8=4×10^8×X

X= 3×10^8/4×10^8= 0.75m

Answer:

Radio telescopes .

Explanation:

They have a modest size that can't make out as much detail (have a lower resolution) than visible light telescopes

The integral of the function of the force applied to the time of application

of the force gives the impulse of the force.

The speed with which the ball rebounds from the plate is approximately

34.23 m/s.

Reasons:

Force = Rate of change of momentum

F × t = m·(v₂ - v₁)

Where;

Speed of the ball, v₁ = 16 m/s

v₂ = The speed with which the ball rebounds from the plate

The impulse, I, of the force is given by the area under the curve.

The height of the triangular curve, h = 2,500 N

The base length of the triangular curve = 7 ms.

Area of a triangle = [tex]\frac{1}{2}[/tex] × Base length × Height

Therefore, we have;

[tex]Area \ under \ the \ curve, \, I = \dfrac{0.007 \times 2500}{2} = 8.75[/tex]

8.75 = 0.48 × (v₂ - 16)

v₂ ≈ 34.23 m/s

Therefore, the speed with which the ball rebounds, v₂ ≈ 34.23 m/s.

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https://brainly.com/question/20595307

https://brainly.com/question/13769802

Answer:

mass of the products

Explanation:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

Answer:

[tex]\boxed{\mathfrak{Power(P)=\frac{Voltage(V)^2}{Resistance(R)} }}[/tex]

[tex]\implies \mathsf{24=\frac{12^2}{R} }[/tex]

[tex]\implies \mathsf{24R=12^2 }[/tex]

[tex]\implies \mathsf{24R=144 }[/tex]

=> R= 6 Ohms(Ω)

[tex]\boxed{\mathfrak{Power(P)=\frac{Voltage(V)^2}{Resistance(R)} }}[/tex]

these lights operate at the usual 240 volts direct from the main electricity supply. Therefore,

[tex]\implies \mathsf{100=\frac{240^2}{R} }[/tex]

R and 100 can interchange places

[tex]\implies \mathsf{R=\frac{240^2}{100} }[/tex]

[tex]\implies \mathsf{R=\frac{57600}{100} }[/tex]

=> R = 576 Ω

By Ohm's Law:

[tex]\boxed{\mathsf{Voltage(V)=Current(I) \times Resistance(R)}}[/tex]

=> 240 = I × 576

=>

=> I = 0.417 A

I don't know it's resistance,... so sorry

The brightness of the bulb in series is less than when they're placed individually.

For bulbs in series their resistance gets added to form the equivalent resistance of the two bulbs.

Their resistances are nothing but mere numbers and the sum of two numbers(positive of course) is greater than the numbers.

So, the effective resistance of some bulbs in series is more than the individual resistance.

And

Brightness, i. e., Power

[tex]\boxed{\mathfrak{Power \propto \frac{1}{Resistance} }}[/tex]

If resistance increases, Power decreases.

Here, the effective resistance was for sure larger, therefore resistance was increasing, hence power decreased taking brightness along with it.

Answer:

Water and power come from external sources.

Explanation:

Answer:

Tropical region

Explanation:

because the regions near the equator are called tropical regions

Phát biểu nào sau đây sai?

A. Hàm lượng cacbon trong thép cao hơn trong gang.

B. Sắt là kim loại màu trắng hơi xám, dẫn nhiệt tốt.

C. Quặng pirit sắt có thành phần chính là FeS2.

D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.

D. Sắt (III) hiđroxit là chất rắn, màu nâu đỏ, không tan trong nước.

CARRY ON LEARNING

CAN YOU BRAINLEST ME

Explanation:

Motor evoked potentials (MEPs) are the electrical signals recorded from the descending motor pathways or from muscles following stimulation of motor pathways within the brain.

Espero eso ayude. Marque como más inteligente.

Answer:

The answer is true. Hope this helps!

Answer:

Amplitude

Explanation:

Answer:

the wave trough.

Explanation:

As is shown on the figure, wave height is defined as the height of the wave from the wave top, called the wave crest to the bottom of the wave, called the wave trough. The wave length is defined as the horizontal distance between two successive crests or troughs.

The vertical force P, that will just be sufficient to lift the end Y from the ground is 600 N.

If the force P is applied at end X, it will not be sufficient to lift end X from the ground because the force P is acting downwards.

The sketch of the rod is presented as follows;

|---- 2 ----------|---------------------- 3 ----------------------|

X-----------------------------------------------------------------Y

P                    ↓

                      40 kg

Take moment about the center of gravity;

P(2) = 40 x g (3)

2P = 40 x 10 (3)

2P = 1200

P = 600 N

Thus, the vertical force P, that will just be sufficient to lift the end Y from the ground is 600 N.

If the force P is applied at end X, it will not be sufficient to lift end X from the ground because the force P is acting downwards.

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Answer:

Explanation:

Think about hockey for little to no friction if you push on the puck it moves fast and far.

Now imagine taking the same puck and pushing it on gravel or grass it will not have the same motion.

Answer:

The question does not state how the answer is to be entered. I would use 10% because that is most common.

Explanation:

You are using 300 J of energy to get 30 J of light energy. The fact that you can account for the left over energy is not relevant.

Efficiency = Work Out / Work In

Efficiency = 30 J / 300 J  = 0.1

If you need this as a %, you can multiply by 100

Efficiency = 0.1 * 100 = 10%

Answer:

as we know Speed=Distance÷Time

Distance=Speed×Time

Velocity=Displacement÷Time

Displacement=Velocity×Time

u haven't given the speed and all give it and I will tell the answer