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
Elza [17]
3 years ago
8

Sobre os fenômenos envolvendo os processos de eletrização, considerando-se dois corpos, é verdade que: * 4 pontos são obtidas ca

rgas de sinais opostos em cada corpo, nos processos de eletrização por contato e por indução. para que ocorra eletrização por atrito, um dos corpos necessita estar inicialmente eletrizado. a eletrização por indução somente pode ser realizada com o envolvimento de uma ligação direta com o solo, chamada de aterramento. um corpo não eletrizado é também chamado de corpo neutro, por não possuir prótons e elétrons.. todos os tipos de eletrização envolvem contato físico entre os corpos a serem eletrizados.
Physics
1 answer:
tester [92]3 years ago
4 0

Explanation:

Here's the clear rendering;

Regarding the phenomena involving the electrification processes, considering two bodies, it is true that: *

• 4 points are obtained with opposite signal charges in each body,

• in the contact and induction electrification processes,

• for friction electrification to occur, one of the bodies needs to be initially electrified,

• induction electrification can only be performed with the involvement of a direct connection to the ground, called earthing,

• a non-electrified body is also called a neutral body, as it does not have protons and electrons,

• all types of electrification involve physical contact between the bodies to be electrified.

You might be interested in
What is the power in a circuit with a voltage of 120 V and a resistance of 50
k0ka [10]

Answer:

288W.

Explanation:

P = IV = V^2 / R = (120)^2 / 50 = 288W.

8 0
3 years ago
A projectile is fired from ground level with an initial speed of 55.6 m/s at an angle of 41.2° above the horizontal. (a) Determi
sattari [20]

Answer:

(a) t = 3.74 s

(b) H = 136.86 m

(c) Vₓ = 41.83 m/s,  Vy = 0 m/s

(d) ax = 0 m/s²,  ay = 9.8 m/s²

Explanation:

(a)

Time to reach maximum height by the projectile is given as:

t = V₀ Sinθ/g

where,

V₀ = Launching Speed = 55.6 m/s

Angle with Horizontal = θ = 41.2°

g = 9.8 m/s²

Therefore,

t = (55.6 m/s)(Sin 41.2°)/(9.8 m/s²)

<u>t = 3.74 s</u>

<u></u>

(b)

Maximum height reached by projectile is:

H = V₀² Sin²θ/g

H = (55.6 m/s)² (Sin²41.2°)/(9.8 m/s²)

<u>H = 136.86 m</u>

<u></u>

(c)

Neglecting the air resistance, the horizontal component of velocity remains constant. This component can be evaluated by the formula:

Vₓ = V₀ₓ = V₀ Cos θ

Vₓ = (55.6 m/s)(Cos 41.2°)

<u>Vₓ = 41.83 m/s</u>

Since, the projectile stops momentarily in vertical direction at the highest point. Therefore, the vertical component of velocity will be zero at the highest point.

<u>Vy = 0 m/s</u>

<u></u>

(d)

Since, the horizontal component of velocity is uniform. Thus there is no acceleration in horizontal direction.

<u>ax = 0 m/s²</u>

The vertical component of acceleration is always equal to the acceleration due to gravity during projectile motion:

<u>ay = 9.8 m/s²</u>

3 0
3 years ago
Unrestrained occupants of a car keep moving during the time the car takes to stop due to ________.
elena-14-01-66 [18.8K]

Answer:

C.inertia

Explanation:

Inertia is a property of matter to<u> maintain its state of motion</u>.

In this case, if the car was moving along with the people in it when the car stopped, the inertia of the people will cause them to continue moving.

This is why in a crash a person can be shot from the car, due to the inertia he has from his previous state of motion.

The complete sentence is: Unrestrained occupants of a car keep moving during the time the car takes to stop due to<u> inertia. </u>(option C)

4 0
4 years ago
With a quarter-turn flick of the wrist, a student sets the frisbee rotating at 570 rpm . what is the magnitude of the torque, as
Sunny_sXe [5.5K]
Torque: \tau = \overrightarrow r \times \overrightarrow F = rFsin\theta = I\alpha

 
6 0
3 years ago
During the refrigeration cycle, warm gases are made even hotter due to _____
laila [671]
During the refrigeration cycle, warm gases are made even hotter due to pressurization
8 0
4 years ago
Other questions:
  • How do you find the volume of a cone with a height of 27 cm and a radius of 13 cm?
    12·1 answer
  • A tire hanging from a tree is at rest. The force of gravity is pulling down on the tire. Another force, called tension, is pulli
    10·2 answers
  • A force of 8 N is used to drag a chair 2.5 metres across a room. Calculate the work done to move the chair.
    5·2 answers
  • Three cars (car F, car G, and car H) are moving with the same velocity when the driver suddenly slams on the brakes, locking the
    6·1 answer
  • An electrostatic dust precipitator that is installed in a factory smokestack includes a straight metal wire of length 0.7 m that
    8·1 answer
  • What is weight? and what is mass
    5·1 answer
  • 3. What is the mass of a paratrooper who experiences an air resistance of 400 N and an acceleration of 4.5 m/s2
    10·1 answer
  • 1. Simplify the following expression<br> 8-6/4-12+3^2
    6·1 answer
  • The driver of a 1,500 kg car is traveling at 25 m/s. A deer runs into the road and the driver slams on the brakes. If it takes t
    11·1 answer
  • How much energy is required to accelerate a golf ball of mass 0.046 kg initially at rest to a speed of 0.75c?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!