1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Amiraneli [1.4K]
2 years ago
8

Hello people ~

Physics
1 answer:
Fantom [35]2 years ago
3 0

Explanation:

In di electric medium

The force is

  • \sf F_{dE}=\dfrac{1}{4K\pi\epsilon}\dfrac{q_1q_2}{R^2}

So the force on air is decreased k times

Option C is correct

You might be interested in
A 45-mH inductor is connected in series with a 60-Ω resistor through a 15-V dc power supply and a switch. If the switch is close
egoroff_w [7]

Answer:

The current is 0.248 A

Explanation:

Given that,

Inductor L= 45\times10^{3}\ H

Resistance R= 60\Omega

Voltage = 15 volt

Time t =7.0\times10^{-3}\ sec

We need to calculate the current

Using formula of current

I=\dfrac{V}{R}(1-e^{\dfrac{-R}{L}}t)

Where, V = voltage

R = resistance

L = inductance

T = time

Put the value into the formula

I=\dfrac{15}{60}(1-e^{\dfrac{-60}{45\times10^{3}}}\times7\times10^{-3})

I=0.248\ A

Hence, The current is 0.248 A.

4 0
3 years ago
Be sure you understand why a pendulum in equilibrium hanging in a car that is accelerating forward tilts backward, and then cons
Gnesinka [82]

Answer:

A helium filled balloon floats forwards in a accelerating car because of the pressure difference between the front and the back of the car. When the car is accelerating, the air moves relitive to the car and the consequence is that the pressure in the back is slightly higher than in the front; which results in net force in forward direction.

hit that heart please leave brainliest and let me know if want me to answer or explain it in a different way :)

6 0
3 years ago
What happens to a bowl of hot soup when it is placed into a freezer where the air Temperature is below freezing. How does this a
Artyom0805 [142]
It does not it when put in the freezer it freezes the steam
8 0
3 years ago
Review Questions
harina [27]

Answer:

  1. Milky way is a galaxy . Milky way has a spiral shape . The Milky Way has a relatively low surface brightness due to the gases and dust that fills the galactic disk. it comprises of dust particles , 200 billion stars.
  2. they are bounded into clusters due to gravitational force out there.
  3. when you ask how is gravity important to the galaxy within universe then ask what hold the lump of solar system together in this great cosmic soup when whole universe is expanding ? yea , there is gravity . Hravity holds these objects together and today we have a cute solar system .
  4. The galaxies are generally observed using shapes - some are eleptical , some are spiral and some are just irregular
  5. GRAVITY !!yes , gravity holds the shape of stars in galaxy , gravity helps in keeping thing stable in universe. gravity restricts the moon from flying away in the space as the gravity of earth atttracts it towards itself .

4 0
3 years ago
You place a chunk of naturally radioactive (it means not enriched for nuclear purposes) material on the not very exact scale and
Ber [7]

Answer:

he mass of the emitted particles is small, it is slightly less than the initial 50 kg, so the correct answer is the first.

Explanation:

A radioactive material is transformed into another material by the emission of some particular radioactive ones, the most common being alpha and beta rays, which is why in the transformation process a certain amount of mass is lost. The process is described by the expression

             

              N = No e^{- \alpha /t}

 

From this expression the quantity half life time (T_{1/2}) is defined with time so that half of the atoms have been transformed

           

            T_{1/2} = ln 2 /λ

in this case it does not indicate that T_{1/2}= 20 days is worth, for which periods have passed, in the first the number of radioactive atoms was reduced to half the number, leaving N´ and the second halved the number of nuclei that they were radioactive, leaving radioactive nuclei

first time of life

              N´ = ½ N

second time of life

              N´´ = ½ N´

              N´´ = ¼ N

consequently in the sample at the end of these two decay periods we have, assuming that after each emission the atom is stable (non-radioactive). After the first emission there are n₁ = N / 2 stable atoms, after the second emission n₂ = ¼ N stable atoms are added and there are still n₃ = ¼ N radioactive atoms, so the total number of atoms is

 

             n_total = n₁ + n₂ + n₃

Recall that the mass of the initial radioactive atoms is m₁, when transforming its mass of stable atoms is m₂ where

            m₂ < m₁

therefore mass of

 

             m_total = m₂ N / 2 + m₂ N / 4 + m₁ N / 4

             m_total = m₂ ¾ N + m₁ ¼ N

             m_total = N (  ¾ m₂ + ¼ m₁)

Since the mass of the emitted particles is small, it is slightly less than the initial 50 kg, so the correct answer is the first.

8 0
2 years ago
Other questions:
  • Suzanne notices that when sunlight strikes the surface of a calm lake, it creates a glare. Which statement accurately describes
    12·1 answer
  • What would happen if guard cells in a plant stopped working
    15·1 answer
  • what is the mass of an object that is experiencing a net force of 200N and an acceleration of 500m/s2​
    11·1 answer
  • The law of reflection is quite useful for mirrors and other flat, shiny surfaces. (This sort of reflection is called specular re
    8·1 answer
  • Which of the following examples does not illustrate Newton's first law of motion?
    6·1 answer
  • What is the sound level in a car when the intensity is 0.5 pW/m2?
    14·2 answers
  • At 10:30 AM, detectives discover a dead body in a room and measure its temperature at 31∘C. One hour later, the body’s temperatu
    10·1 answer
  • What is the temperature of a 3.72 mm cube (e=0.288) that radiates 56.6 W?
    13·1 answer
  • A vocalist with a bass voice can sing as low as 92 Hz.
    13·1 answer
  • The resulting net force of an object is represented below.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!