Answer:
1 N
Explanation:
Given that two point charges +3 micro coulomb and +8 micro coulomb repel each other with a force of 40N.
Let us first calculate the distance between the two point charges
F = (KQq)/r^2
Where K = 9.0 × 10^9Nm^2C^-2
40 = (9×10^9 × 3×10^-6 × 8×10^-6)/r^2
Make r^2 the subject of formula
r^2 = 0.216/40
r = sqrt (5.4^-3)
r = 0.0735 metres
If a charge of -5 micro coulomb is added to each of them, then the force between them will become?
Using the same formula again
F = ( KQq)/r^2
Where Q = 8 - 5 = +3 × 10^-6 C
q = 3 - 5 = - 2 × 10^-6 C
F = ( 9×10^9 × 3×10^-6 × 2×10^-6 )/5.4×10^-2
F = 0.054/0.054
F = 1 N
The force of attraction between the two point charges will be 1 N
A body weighs 65N.Calculate it's mass.(g=10N/kg)
Explanation:
Hey there!!
Here,
Weighs = 65n
Gravity = 10n
We know that,
weighs = mass × gravity.
65 = m × 10
[tex]m = \frac{65}{10} [/tex]
Therefore the mass is 6.5 kg.
Hope it helps...
What can affect gravity
Helpppppp!!!
Express 3 x 10-9s in milliseconds
Answer:
3 × 10 to the power minus 6 milliseconds
When we convert 3 x 10⁻⁹ s into milliseconds it would be 3 x 10⁻⁶milliseconds
What are significant figures?In positional notation, significant figures refer to the digits in a number that is trustworthy and required to denote the amount of something, also known as the significant digits, precision, or resolution.
If a number describing the result of a measurement (such as length, pressure, volume, or mass) includes more digits than the number of digits permitted by the measurement resolution, only the digits allowed by the measurement resolution can be significant figures.
As given in the problem we have to convert 3 x 10⁻⁹ s into milliseconds
1 second = 1×10³ milliseconds
3 x 10⁻⁹ seconds = (3 x 10⁻⁹) × (1×10³ )
= 3 x 10⁻⁶milliseconds
Thus, 3 x 10⁻⁹ s converted into milliseconds it would be 3 x 10⁻⁶ milliseconds
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Basketball is __________ to the United States
Question 4 options:
Native
Foreign
New
Unknown
Answer:
native
Explanation:
bc it was started when we were playing it with baskets
1. What types of emergency situations could
rescue workers be in that would make it
difficult for them to get energy to their
electrical devices?
Answer:
large-scale natural disasters
Explanation:
The niceties of civilization are generally unavailable over wide areas when they are affected by ...
hurricanesearthquakestornadoesSuch situations often require rescue workers.
Situations such as:
natural disasters, such as flooding.fire disastersFirst, we wonder, who are rescue workers? Basically speaking, a rescue worker is anyone who is trained to bring people out of any harm, danger, or threat that may come their way.
|n such emergency situations, power lines are usually down, and so it may be difficult for them to get the energy needed to power their electrical devices.
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please someone help me.
A car starts to move from rest after 5 seconds its velocity becomes 15m/s, find the acceleration of the car.
Answer:
acceleration of the car is 3 m\s^2
Explanation:
from rest means the initial velocity (vi) is zero
time = 5s
final velocity (vf) = 15m\s
a = vf - vi \ t
a = (15-0) \ 5
a= 3 m\s^2
which means that the car is speeding up 3 meters every second
Answer:
3m/s
Simple
Explanation:
Solution,
U=0
Velocity=15m/s
Time=5 sec
Now,
Acceleration=V-U÷T
=15m/s-0÷5
=15m/s÷5
=3m/s
Hence, the acceleratiob of the car is 3m/s.
Refer to the position time graph provided to answer questions #1 thru 5.
1. What is the instantaneous velocity of the object at 5 s?
2. What is the distance the object moves from 0 to 9 seconds?
3. What displacement did the object have between 2 s and 9 s?
4. What was the object's average velocity over the first 5 seconds?
5. How many times does the object change direction of travel? (time zero
does not count and standing still does not count as a direction change)
Answer:
Explanation:
1). To calculate the instantaneous velocity of the object, we will calculate the slope of the line CD.
Since line CD is a straight line, therefore, slope = 0
Hence instantaneous velocity = 0
2). Distance of the object when it moves from 0 to 9 seconds
= Distance traveled from (A to B + B to C + C to D + D to E)
= 3 + (3 + 0.5) + 0 + 0.5
= 7 m
3). Displacement = Distance between initial and the final positions of the object
= 3 - 0
= 3 m
4). Average velocity = [tex]\frac{\text{Displacement}}{\text{Time}}[/tex]
= [tex]\frac{0.5}{5}[/tex]
= 0.1 m per sec
5). Direction changes have been seen at t = 2 sec and t = 4 sec.
Hence object changed its direction of travel 2 times.
What does the acronym B.E.E.F. stand for?
Question 5 options:
box-out, elbows out, energize, follow-through
balance, engage, eyes, field goal
block, engage, eyes, free-throw
balance, eyes, elbow in, follow-through
The defense is the team that has possession of the basketball, and is trying to score points.
Question 6 options:
True
False
Question 7 (5 points)
The bounciness of a basketball is most important for which action?
Question 7 options:
Shooting
Passing
Dribbling
Stealing
Question 8 (5 points)
What can you infer about why certain shots are worth three points, and others are only worth two?
Question 8 options:
Three-point shots are taken from longer distances, so they're harder to make
Three-point shots reward players for not committing fouls when they shoot
Three-point shots require shooters to battle through more defensive pressure than two-point shots
Three-point shots can only be taken by guards, while two-point shots can be taken by any player
Question 9 (5 points)
How are free throws different from ordinary shots?
Question 9 options:
They only occur late in games
They're taken by defensive players, not offensive players
They cannot be rebounded
They're each worth one point instead of two or three
Question 10 (5 points)
A player with the basketball has to dribble the ball to be able to move around.
Question 10 options:
True
False
Question 11 (5 points)
All shots in basketball are worth two points.
Question 11 options:
True
False
Question 12 (5 points)
Which skill is least useful on defense?
Question 12 options:
Speed
Strength
Passing Ability
Jumping Ability
Question 13 (5 points)
Who is the inventor of basketball?
Question 13 options:
James Naismith
John Bradshaw
Jerry West
Joe Namath
Question 14 (5 points)
What conclusion can be drawn from the fact that many of the best international players want to play in the NBA?
Question 14 options:
It's easier to join NBA teams than teams in other countries
Many of these players have never been to the United States
Basketball isn't very popular outside the United States
The NBA is the most competitive league in the world
Question 15 (5 points)
Which action is taken only by teams on offense?
Question 15 options:
Rebounding
Blocking
Stealing
Shooting
Question 16 (5 points)
A free-throw is a one point shot from the foul line.
Question 16 options:
True
False
Question 17 (5 points)
Finger-pads, waist level, and eyes up are cues for what skill?
Question 17 options:
Shooting
Stealing
Dribbling
Passing
Question 18 (5 points)
A person should step toward their target when passing the basketball.
Question 18 options:
True
False
Question 19 (5 points)
Any illegal physical contact to a basketball player is a foul.
Question 19 options:
True
False
Question 20 (5 points)
It is important to keep the _________ in when shooting the basketball.
Question 20 options:
Ankle
Foot
Knee
Elbow
Answer:
balance, eyes, elbow in, follow-through
Explanation:
A compass taken to Earth's moon does not point in a specific direction on the moon.
What is the most likely reason for the difference between how the compass works on Earth and on the moon?
A) The moon lacks an atmosphere.
B) The moon contains no rocks that have iron.
C) The moon does not have a strong magnetic field.
D) The moon has no bodies of water.
Answer:
C.
Explanation:
The moon does not have a strong magnetic field. This is the most likely reason for the difference between how the compass works on Earth and on the moon. Hence option C is correct.
What is magnetic field ?The magnetic impact on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it while the charge is travelling through a magnetic field The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. Paramagnetism, diamagnetism, and antiferromagnetism are three additional magnetic effects that a nonuniform magnetic field may have on "nonmagnetic" materials, albeit these forces are often so minute that they can only be detected by laboratory equipment. Electric currents, such those utilised in electromagnets, and electric fields that change in time produce magnetic fields that surround magnetised objects.
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A ball is dropped from rest from a high window of a tall building and falls for 4 seconds. Neglecting air resistance, the final velocity of the ball is?
Answer:
The final velocity of the ball is 39.2 m/s.
Explanation:
Given that,
A ball is dropped from rest from a high window of a tall building.
Time = 4 sec
We need to calculate the final velocity of the ball
Using equation if motion
[tex]v=u+gt[/tex]
Where, v = final velocity
u = initial velocity
g = acceleration due to gravity
t = time
Put the value into the formula
[tex]v=0+9.8\times4[/tex]
[tex]v=39.2\ m/s[/tex]
Hence, The final velocity of the ball is 39.2 m/s.
Explain any two areas affected by migration
Answer:
Migration is affected by various factors like age, sex, marital status, education, occupation, employment etc. Age and sex are main demographic factors that affect the migration. Men, generally, migrate to other places quite often though there are more women who migrate to husbands' places after marriage.Answer:
Social aspect:
In the place of origin migration can create a lack of food, accomodation and other basic services and facilities. Because of influence of lanuage, tradition , culture etc carried by immigrants the native language culture and tradition of the target place may get endangered. This may create diverseness of culture language so there can be disunity and factionalism in society. Target place may have to experience unemployment and criminal activities may take a lead.The place of origin may have to suffer from depopulation and slow development as well..
Economic aspect:
Target place may get some more manpower which results in fast development. But if the manpower is enough or more then unemployment can be resulted. This may cause brain drain. Poverty may take a lead. Landlords may exploit labourers ....
If a boat goes from 30 km/h to 50 km/h over the next 4 h, what is its acceleration? 30-50/4
Acceleration = (change in speed) divided by (time for the change)
Change in speed = (50 km/h)-(30 km/h)
Change in speed = 20 km/h
Acceleration = (20 km/h) / (4 h)
Acceleration = 5 km per hour-squared
What force is needed to accelerate a 90 kg punching bag 13 m/s2?
Answer:
The answer is 1170 Newton
Explanation:
Force =. Mass × Acceleration
= 90 × 13
= 1170 Newton
A cannon is fired horizontally from the edge of a 100 meter tall cliff. The muzzle velocity of the cannon is 180 m/s . How far from the base of the cliff does the hall land?
A-.55m
B-813.16m
C-3673.47
D-700m
Answer:
B - 813.16 m
Explanation:
First, find the time it takes to land. Given in the y direction:
Δy = 100 m
v₀ = 0 m/s
a = 9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
100 m = (0 m/s) t + ½ (9.8 m/s²) t²
t = 4.52 s
Now find the distance traveled in that time. Given in the x direction:
v₀ = 180 m/s
a = 0 m/s²
t = 4.52 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (180 m/s) (4.52 s) + ½ (0 m/s²) (4.52 s)²
Δx = 813.16 m
what type if data do you call it when a scientists mesure the length of the growing root tip and determine the rate a particular reaction
Which statement explains why carbon 14 dating cannot be used to date ancient rocks
Answer:
Carbon-14 decays relatively quickly
Explanation:
i took the test
PLEASE HELP*******
use the table to find the acceleration of the object for the time interval 1.0 to 4.0 seconds
Answer:
acceleration for time interval from 1 sec to 4 second is 1.5 metre/second^2
mark it as brainliest!!
A _________ reactive metal replaces a ____________ reactive metal in a chemical reaction. A. Less, more B. More, similar C. Similar, Less D. More, less
The answer is D. A more reactive metal replaces a less reactive metal in a chemical reaction.
HELP ME PLZ!!!! I'LL DO ABSOLUTELY ANYTHING, AND I MEAN ANYTHING!!!!!!
Answer:
There are so many things that make human travel difficult.
Here are some ideas ;
1) Air and Water -Taking water and oxygen from the Earth is very expensive and very difficult. (Note that if there is lots of water, oxygen can be made from the water. Also, if there is carbon dioxide, oxygen can be made.)
2) Food - people will need to grow their own food on another planet - transportation to and from Earth is, again, too expensive. Plants need carbon dioxide and sunlight (real sunlight is best; artificial lighting will work, too.)
3) Energy - Human settlements will need to create their own energy. Energy can be created using the sun.
Note that these powers have their own advantages and disadvantages
4) Radiation - Radiation is harmful for people, plants and animals. On Earth, we are protected by a magnetic field and an atmosphere. Some planets and moons have neither; some have only one or the other. Very few have both. Some planets have very strong magnetic fields that create even more radiation. Crazy right .
5) Gravity - planets or moons with a lesser gravitational pull than the Earth will result in astronauts having smaller bone and muscle mass, which is a serious problem if they are to come back to Earth. The closer a planet's gravity is to Earth, the less of a problem this is.
6) Atmosphere - Some planets have no atmosphere while some have atmospheres that will crush people(Woah ) .It's easier to deal with low-pressure rather than high-pressure, but both are dangerous if there is an air leak.
7) Distance - the further a planet is from Earth, the harder it is to.
8) Temperature - The hotter or colder a planet is, the more energy it will take to change the temperature(and im not really sure how ).
Explanation:
A car with a mass of 1,200 kg travels a distance of 150 m as it moves from
one stoplight to the next. At its fastest, the car travels at 22 m/s. What is its
kinetic energy at this point?
A. 290,400
B. 8,872 J
C. 580,800 J
D. 13,200 J
Answer:
A. 290,400
Explanation:
The kinetic energy of a car is 290,400J.
How to find Kinetic energy?Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2.
ke = 1/2mv^2
By using the formula, we get
= 1/2 * 1200 * 22^2
= 600 * 484
= 290,400 J
Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.
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what are 6 things the four states of matter have in common please help asap!
Explain why this statement is incorrect: “If I find something on the Internet, that means it is for public use, and I can do anything I want with it.” I give braininess
Answer:
A personal idea is an idea or concept that is unique to the individual who created it. Reference credit must be given when the idea is used by any person who did not create the concept.
Explanation:
I took the assignment already.
A personal concept is a concept or idea this is unique to the man or woman who created it. Reference credit scores have to receive when the idea is utilized by any individual who did not create the idea.
What is the internet?The net is a big network that connects computers all over the world. through the net, people can percentage information and talk from anywhere with a web connection.
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The simplest form of a substance
is called:
A a period
B a property
Can atom
D an atomic number
PAGE 29
Q. 1. What is meant by power of accomodation of the eye?
This is the process of changing the shape of the eye lens to focus on near or distant objects.
An open system starts with 52 J of mechanical energy. The energy changes
to 45 J of mechanical energy and 2 J of thermal energy. What is the final total
energy of the system?
A. 50 J
B. 54 J
C. 47 J
O D. 9 J
Answer:
ITS C 47
Explanation:
When velocity is positive and acceleration is negative, what happens to the object’s motion?
a The object speeds up.
b The object remains at rest.
c Nothing happens to the object.
d The object slows down.
Answer:
Option (D) : The object slows down.
Carlos runs with velocity \vec{v}v →= (5.6 m/s, 29o north of east) for 10 minutes. How far to the north of his starting position does Carlos end up? (Give your answer to the nearest meter)
Answer:
1629 metres
Explanation:
Given that Carlos runs with velocity v = (5.6 m/s, 29o north of east) for 10 minutes.
To the north, the velocity will be:
V = 5.6 × sin 29
V = 2.715 m/s
Convert the time to second
Time = 10 × 60 = 600
Using the formula below
Velocity = distance/ time
Substitute all the parameters into the formula
2.715 = distance/600
Distance = 2.715 × 600
distance = 1629 m
Physical science
convert 43 cg to mg
Answer:
430
Explanation:
converted it to cg then to mg
Explain what you know about the current structure of the atom. Be sure to include the following:
1. What parts of the atom are located INSIDE the nucleus?
2. What parts of the atom are located OUTSIDE the nucleus?
3. What is the charge (positive/negative/neutral) inside the nucleus?
4. What is the overall charge (positive/negative/neutral) of an atom?
What is the average velocity of an object that moves from 7.3 cm to 4.1 cm relative to the origin in 2.5 s
PLEASE HELP ME I DONT WANT TO FAIL
Answer:1 7/25
Explanation:take the total distance7.3-4.1 then divide by the total time taken
The average velocity of the object is equal to -1.28m/s relative to the origin when it moves for 2.4 seconds.
What is average velocity?Average velocity is a vector quantity and is defined as the change in position (∆x) divided by the time intervals (∆t) in which it occurs. The average velocity can be positive or negative and the S.I. unit of average velocity is m/s.
The average velocity of an object = ∆x/∆t
The average velocity of an object involves only the displacement of the object. However, the magnitude of the displacement of an object can be different from the actual path length.
Given, the displacement of the object = final position - initial position
∆x = 4.1 - 7.3 = -3.2m
The time, ∆t = 2.5 - 0 = 2.5 s
The average velocity of the object = ∆x/∆t = -3.2/2.5 = -1.28 m/s
Therefore, the average velocity of the object is -1/28 m/s relative to origin.
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