Explanation:
For example, a uniform electric field E is produced by placing a potential difference (or voltage) ΔV across two parallel metal plates, labeled A and B. ... The relationship between ΔV and E is revealed by calculating the work done by the force in moving a charge from point A to point B.
A 200kg car is coasting to the right and slowing down due to a friction force of 200N.
By Newton's second law, the net force on the car is
∑ F = m a
where m is the mass of the car and a is magnitude of the acceleration.
The car is slowing down, so the net force opposes the direction in which the car is moving. Vertically, the car is in equilibrium, the net force is entirely due to friction. Taking the direction opposite the car's motion to be negative, we have
- 200 N = (200 kg) (-a)
a = (200 kg) / (200 N)
a = 1 m/s²
If you're also supposed to find the coefficient of kinetic friction, use the fact that the car the vertical forces cancel out, namely
n + (-w) = 0
where n is the magnitude of the normal force and w is the car's weight. The friction force f is proportional to the normal force n by a factor of µ, the coefficient of kinetic friction, such that f = µ n. Then
f / µ = w
(200 N) / µ = (200 kg) (9.80 m/s²)
µ = (200 N) / ((200 kg) (9.80 m/s²))
µ ≈ 0.102
Guys if you see this please help me
A girl throws a pebble into a deep well at 4.0 m/s (downward). It hits the
water in 2.0 s.
a. How far below the ground is the water's surface?
b. What is the pebble's average velocity?
Ummmm ya girl needs help
hydrogen: 4
nitrogen: 4
oxygen: 12
this should be correct
A 21.2-kg object is being pulled in one direction by a force of 68.8 N while a force of 26.5 N pulls in the opposite direction. What is the acceleration of the object
The net force is in the direction of the larger force. If we take that direction to be positive, then the net force has a magnitude of
68.8 N - 26.5 N = 42.3 N
Use Newton's second law to solve for the acceleration:
F = m a
42.3 N = (21.2 kg) a
a = (42.3 N) / (21.2 kg)
a ≈ 2.00 m/s²
(you might also try 1.99 or 2.01 in case that doesn't get accepted)
What is the main difference between protons and neutrons
A protons have a much smaller mass than neutrons
B protons have a much larger value than neutrons
C protons have an electrical charge but neutrons have no charge
D protons make up the nucleus but neutrons orbit around the nucleus
Answer:
C: Protons have an electrical carge but neutrons have no charge.
Explanation:
Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged.
What are the different forms of treatments available for somatoform disorders?
Answer:
Treatment options include medications, particularly tricyclic antidepressants and SSRIs,21,22 and psychotherapy. Nonpharmacologic treatment strategies (e.g., massage, acupuncture) may also be beneficial. patients initially presented with symptomatic pain due to a shoulder injury.
Somatoform disorders can be treated by psychotherapy and through medications.
What are somatoform disorders?Somatoform disorders are a group of psychiatric disorders whereby patients have a wide variety of clinically significant but unexplained physical symptoms.
The treatment options for somatoform disorders include:
PsychotherapyMedications Yoga and meditationAcupunctureTherefore, somatoform disorders can be treated by psychotherapy and through medications.
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Look at the picture below.
What will happen to the
water if it is left in the sun
for an extended amount of
time?
ANOTHER 40 POINTS!!!
Why is it important for a system of objects to be isolated in order for the law of conservation of energy to apply?
A. The energy of each object in the system must not change.
B. The system must not exchange energy with other systems.
C. Energy must be able to freely move in and out of the system.
D. The type of energy that each object in the system has must always remain the same.
Difference between lens formula and mirror firmula?
PLEAASSEEEE HELLLPPPP !!!
Answer:
a = 3.5 m/s^2
Explanation:
a basic equation of physics is f = ma
we can rearrange that to a= f/m
so plug in your values: a = 175 / 50
you get a = 3.5 m/s^2
The distance between two stations is 180 km. A train takes 2 hours to cover this distance. The speed of the train in m/sec is......please help i rlly need it ....Please
Answer:
Av = 25 [m/s]
Explanation:
To solve this problem we must use the definition of speed, which is defined as the relationship between distance over time. for this case we have.
[tex]Av=\frac{distance}{time}[/tex]
where:
Av = speed [km/h] or [m/s]
distance = 180 [km]
time = 2 [hr]
Therefore the speed is equal to:
[tex]Av = \frac{180}{2} \\Av = 90 [km/h][/tex]
Now we must convert from kilometers per hour to meters per second
[tex]90[\frac{km}{h}]*1000[\frac{m}{1km}]*1[\frac{h}{3600s} ]= 25 [m/s][/tex]
Which two terms describe the relationship between the two variables in this graph?
A man weighing 490 N on earth weighs only 81.7 N on the moon. His mass on the moon is ____ kg. (Use g=9.8 m/s²)
Answer:
mass= 50kg
since the mass is constant everywhere
Heat moves from hot to cold either through air or liquid
Answer:
both
Explanation:
because when it is hot in summer 5hat is the air and the sund u can warm things up and then it get hot
What is the momentum of a 10 kg object traveling at 4 m/s?
An object is traveling with a constant velocity of 5 m/s. How far will it have gone after 7 s?
Answer:
35 miles
Explanation:
5 times 7
How does an object gain potential energy
A) by melting
B) by gaining speed
C) by cooling to a lower temperature
D) by being raised above the ground
Answer:
d
Explanation:
Answer:
D
Explanation:
Gravitaional potential energy is energy that is stored by moving an object to a greater height above the ground.
im not sure if its right, but i tried :)
A book is at rest on a table. Identify the correct free-body diagram for this situation.
Answer:
the 3rd pic is correct
Explanation:
because the arrows are going away from each other.
Mars has two moons. What does the orbital speed of these moons depend on?
Answer:
their masses and their distances from Mars
Explanation:
Hope this helped
Also can u pls mark me brainliest
The picture shows an aerialist walking on a tightrope and holding a balancing bar.
An action-reaction pair of forces exists between-
A. the aerialist's arms and legs
B. the rope and the balancing bar
C. the aerialist's feet and the rope
D. the aerialist's body and shoes.
An action reaction pair of forces exists between : ( A ) The aerialist arms and legs
Action-reaction pair of forcesAction-reaction pair of force comprises of the force that acts on the object as a action force and the force experiened by the object due to newton third law of motion as the reaction force. Therefore in the diagram an action reaction pair of forces can be experienced between the aerialist arms and legs
Hence we can conclude that An action reaction pair of forces exists between : ( A ) The aerialist arms and legs.
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can someone please answer these in the next 20 minutes. ill give you a brainiest. thanks! :)
Answer:
1. 2380m
2. 13.6m
3. 132 Hz
Children should be able to speak clearly and understandably by:
One year old.
Two years old.
Three to four years old.
Four to five years old.
After five.
Answer:
3 to 4
Explanation:
By the time they reach 3 they have achieved speaking 200 or even more
Did you mention the correct independent variable – the substance’s properties (such as solubility, conductivity, and state of matter)?
yes
no
somewhat
Did you mention the correct dependent variable – the type of bond, ionic or covalent?
yes
no
somewhat
Answer:
1. Somewhat 2.Yes
Explanation:
Answer:
C,a
Explanation:
Once a person passes the age of 65, he or she should stop exercising.
Please select the best answer from the choices provided.
ОТ
OF
Answer: False
People age 65 and older still need exercise. Although the intensity of each workout won't be as high compared to younger ages. Everyone needs exercise to keep their heart healthy, to lower the bad cholesterol, etc.
Answer:
no
Explanation:
very false
explain why wind and wave power could not be relied on to provide a country's entire electricity supply .
Answer:
because if the plant that produced that type of energy broke down you would need another type of energy to replace it.
Explanation:
Water boils at 100°C and turns into steam. Which similarities or differences are there between water in these two states? (1 point)
The particles will have more space between them and will be moving at higher speeds as steam.
The particles will have more space between them as steam, but they will be moving at the same speed in both states.
The particles will have more space between them as a liquid, but they will be moving at the same speed in both states.
The particles will have more space between them as a liquid, but they will be moving faster as steam.
Answer:
My answer was A not sure if its correct as i am still doing the rest of the questions.
Explanation:
The particles will have more space between them and will be moving at higher speeds as steam compare to water.
What is latent heat ?The quantity of heat (in joules or calories) per mole or unit mass of the substance undergoing a change in state is the typical way to represent latent heat.
The latent heat involved in melting solids or freezing liquids is referred to as the "heat of fusion," while the latent heat involved in vaporizing solids or liquids or condensing vapor is referred to as the "heat of vaporization."
When water boils at 100°C and turns into steam, water vaporizes into steam by absorbing heat of vaporization. This heat energy remains in the steam as kinetic energy and makes their movement fast.
So, The molecules will have more space between them and will be moving at higher speeds as steam compare to water.
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What is a living thing?
The answer to the question is an orgamisn
Answer:
The thing having life are called living things
Which shows the correct angle of reflection given the incident ray shown?
[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Rays of light.
Since we know that, The light ray on a shiny surface makes a angle with the normal, hence The Angle of incidence is equal to angle of reflection made with Normal Axis in the middle.
Thus Option c.) is correct.
C.) is the Answer.
The angle of reflection given the incident ray from the given diagrams is option C.
What is the refraction of light?When a light ray strikes the shining surfaces, the part of the light gets refracted. The bouncing back of the light is called reflection. When the light strikes the surface is called an incident ray.
When the light ray incident on the surface, the light returns back to the same medium is called reflection. The laws of reflection are, the angle of incidence is equal to the angle of reflection, and the incident ray, reflected ray, and normal takes place in the same plane. The speed of light remains the same in the process of reflection.
The reflected light ray changes the path of direction in the same medium. When a light ray enters from one medium to another, the speed of light gets decreases.
Thus, the ideal solution is option C.
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Reflection is when waves bounce back and Rarefactions are when waves change speed in a new medium.
true or false
Answer:
False
Explanation:
If I am not mistaken reflection is when light bounces off of a surface such as snow,water,glass ect. and refraction is when,the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density?