Hai quả cầu nhỏ hoàn toàn giống nhau, mang điện tích q1, q2 đặt trong chân không cách nhau 20cm thì hút nhau F = 5×10^-5. đặt vào giữa hai quả cầu tấm thủy tinh dày 5 cm có hằng số điện môi là 4. tính lực tác dụng giữa hai quả cầu

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Answer 1

Answer:

Hai quả cầu nhỏ hoàn toàn giống nhau, mang điện tích q1, q2 đặt trong chân không cách nhau 20cm thì hút nhau F = 5×10^-5. đặt vào giữa hai quả cầu tấm thủy tinh dày 5 cm có hằng số điện môi là 4. tính lực tác dụng giữa hai quả cầu


Related Questions

Use the Pythagorean Theorem to find the velocity of an airplane traveling north at 100 kilometers per hour. It is also flying through a wind that is blowing west at 30 kilometers per hour.

Answers

Answer:

I'm not sure

Explanation:

HAVE FAITH IN UR SELF AND YOU WILL GETT ITTTT HOPEFULLAYY

Which describes refraction?
the reflection of light as it passes through a substance



the focusing of light as it passes through a substance


the emission of light as it passes through a substance


the bending of light as it passes through a substance

Answers

Answer:

A

Explanation:

Image result for Which describes refraction? the reflection of light as it passes through a substance the focusing of light as it passes through a substance the emission of light as it passes through a substance the bending of light as it passes through a substance

When electromagnetic radiation, in the form of visible light, travels from one substance or medium into another, the light waves may undergo a phenomenon known as refraction, which is manifested by a bending or change in direction of the light.

Help me with this please

Answers

Wave frequency I’m assuming

Investigators studying the effect of hitting a soccer ball with the head are using a force plate to look at the forces in ball collisions; the force when the ball hits a player's head will be similar. A 0.43 kg ball is launched at a force plate at 16 m/s. Smoothed data for the force versus time for the collision are shown in (Figure 1).

Answers

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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Please heeelllllppppppppp

Answers

Answer:They repel each other

Step by Step Explanation :

If you bring a positive object near the electroscope, it will attract the electrons toward the terminal. The leaves will move away from each other. You can also use this process with a positive object to charge the electroscope.

Hope this helped!

Hope U have a great day!


This car started from rest at a
position of 4 km from the reference
point. It accelerated at 2.2 m/s^2
for a period of 0.5 minutes. How far
from the reference point is the car
located after the acceleration ends?


2 km

5 km

1 km

6 km

Answers

Answer:4.99km

Explanation:

We'll use s for distance, and t for time in seconds.

s = (1/2)at²

t = 0.5 minute*(60sec/1min)=30 sec

s = (1/2)*(2.2m/s²)(30sec)²

s = 990m

Reference point is 4km at start.  Distance from reference point is 9km + 0.990km = 4.99km

What's a real-life example where you have pushed or pulled on different objects and you noticed a difference in how they moved.
Easy pts! Will give Brainliest too!

Answers

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.

The wave speed is 3 x 10^8 m/s, and the frequency is 4 x 10^8 Hz. Calculate its wavelength.

Answers

Answer:

0.75m

Explanation:

V=FX

3×10^8=4×10^8×X

X= 3×10^8/4×10^8= 0.75m

What is the average speed of the object? What is the average velocity?

Answers

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

Equations for work
W=
F=
D=

Answers

Answer:

W= work

F= force

D= Displacement

Explanation:

Work can be calculated with the equation: Work = Force × Distance.

I'LL MARK YOU BRAINLISTTT!!!!

Answers

Answer:

i think it is c

Explanation:

sorry if im wrong

A car's speed 3 seconds after accelerating from rest at 2 m/s^2 is?

Answers

Answer:

After 3 seconds, the velocity is 4.5+3×1.5=9 m/s.

At the end of the Giant Drop free fall ride, riders experience a large experience a large upward normal force to bring their falling bodies to a stop. Determine the normal force value required to accelerate a 52.1-kg physics student with an upward acceleration of 27.4 m/s/s.

Answers

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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If a car accelerates from 0 to 10 m/s in 4 seconds, and the mass of the car is 1500 kg. What force is created by the car?​

Answers

Answer:

PLS MARK BRAINLIEST

Explanation:

f=m (v- u)/t

u=0m/s

v=10m/s

t=4 secs

m=1500kg

f=1500(10-0)/4

f=3750N


would be equal to 0 miles.
If you travel from home, to school and back home, the measure of
distance
velocity
displacement
speed

Answers

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

Safety engineers estimate that an elevator can hold 20 persons of 75kg average mass. The elevator itself has a mass of 500kg. Tensile strength test how the cable supporting the elevator can tolerate a maximum force of 2.96X10^4N. What is the greatest acceleration that the elevators motor can produce without breaking the cable? (show work)

Answers

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

The given parameters;

average mass of the 20 persons = 75 kgmass of the elevator, m = 500 kgtensile strength of the elevator, T = 2.96 x 10⁴ N

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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between a smooth and a rough surface, which of the two surfaces is easier to slide and why?​

Answers

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!

write down the relation between energy and power. ​

Answers

Energy is what makes change happen and can be transferred form one object to another. Energy can also be transformed from one form to another. Power is the rate at which energy is transferred. It is not energy but is often confused with energy.

Energy and power are closely related but are not the same physical quantity. Energy is the ability to cause change; power is the rate energy is moved, or used.

HELP HELP HELP HELP

An object has a mass of 3.8 kg and a force of 11.6 N is applied to it. What is the acceleration that results?

Answers

Mass=3.8kgForce=11.6N

[tex]\\ \sf\longmapsto F=ma[/tex]

[tex]\\ \sf\longmapsto a=\dfrac{F}{m}[/tex]

[tex]\\ \sf\longmapsto a=\dfrac{11.6}{3.8}[/tex]

[tex]\\ \sf\longmapsto a=3.05m/s^2[/tex]

If 21.35 divides 12.96.
What’s the answer
Plzzz help me

Answers

Answer:

1.647376

Explanation:

Change the divisor 12.96 to a whole number by moving the decimal point 2 places to the right. Then move the decimal point in the dividend the same, 2 places to the right.

We then have the equations:

2135 ÷ 1296 = 1.647376

and therefore:

21.35 ÷ 12.96 = 1.647376

Both calculated to 6 decimal places.

in which state of matter would you expect to find water on earth surface if the tempature is 25\

Answers

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:

Convierte 25 Km/h a m/s

Answers

Answer:

6.94444

Explanation:

Answer:

6.944m/s

Explanation:

[tex]25km/h * \frac{1h}{60min}*\frac{1min}{60s} *\frac{1000m}{1km}[/tex]

[tex]\frac{25km}{1h} * \frac{1h}{60min}*\frac{1min}{60s} *\frac{1000m}{1km}[/tex]

[tex]\frac{25km*1h*1min*1000m}{1h*60min*60seg*1km}[/tex]

[tex]\frac{25*1*1*1000}{1*60*60*1}[/tex]

[tex]\frac{125}{18} = 6.944m/s[/tex]


A car with mass 1750 kg travels on a flat circular track with radius
80.0 m at constant
speed 35.0 m/s. What is the force of friction between the tires and the road enabling the turn?

Answers

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

A non-uniform rod XY of mass 40 kg and length 5.0 m lies on the horizontal ground. Its centre of gravity is 2.0 m from the end X. Calculate the vertical force P, that will just be sufficient to lift the end Y from the ground. Why would the force P, if applied at the end X not be sufficient to lift the end X from the ground? (8 = 10.0 (SC/GCE) ms-2)​

Answers

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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A teacher asks a group of students to use a ruler to measure the amplitude of the wave shown below. Between which of the following points should the amplitude be measured?
A. Points U and Z
B. Points V and X
C. Points W and Y
D. Points X and Z

Answers

Answer:

c for me

Explanation:

I don't think so

if I'm correct if I'm wrong

Answer:

a. points u and z

Explanation:

amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position

Answer this question fast please​

Answers

Answer:

A. Strain

Explanation:

(no explanation)

I need the right answer ASAP NO LINKS!!!

Answers

Answer:

Water and power come from external sources.

Explanation:

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.

Answers

QUESTION:

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.

ANSWER:

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

___________________

CARRY ON LEARNING

CAN YOU BRAINLEST ME

Use the diagram below to answer the Question.





Which convection zone region is shown at point 3?

Question 6 options:

polar region


temperate region


tropical region

Answers

Answer:

Tropical region

Explanation:

because the regions near the equator are called tropical regions

que es el potencial motor?

Answers

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.

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