Answer:b
Explanation:
The greatest kinetic friction force occurs when the block is dragged along Sand paper
Kinetic friction is defined as the force of friction that exists between two surfaces in contact as one surface moves over the other.
Many factors affects the magnitude of frictional force and prominent among those factors is the nature of a surface. Rough surface cause a greater frictional force than smooth and highly polished surfaces or smooth surfaces.
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what region of the solar spectrum can cause a dangerous sunburn
:
ultraviolet B
Explanation:
if a penny is dropped from a height of 100m, how fast would it be going just before it hit the ground ?
Hi there!
To find the final velocity of an object dropped from rest, we can used the simplified equation:
vf = √2gh
Plug in the given values: (g = 9.8 m/s²)
vf = √2(9.8)(100) ≈ 44.272 m/s
Calculate the acceleration of the two masses shown in the picture above.
A. 0.77 m/s^2
B. 3.92 m/s^2
C. 8.62 m/s^2
D. 5.91 m/s^2
Hello!
We can begin by summing the forces acting on each mass. (Tension is CONSTANT because the string is both frictionless and massless).
On the 3 kg block: (Ignore forces acting in the vertical direction since there is no motion in that axis)
∑F = -M₁gsinФ + T
On the 8 kg block:
∑F = -T + M₂g
Sum the forces:
∑F = -M₁gsinФ + T -T + M₂g
∑F = -M₁gsinФ + M₂g
Divide by both masses to get the acceleration:
[tex]a = \frac{-M_1gsinФ + M_2g}{m_1+m_2}[/tex]
Plug in values: (g = 10m/s²)
[tex]a = \frac{-(3)(10)(sin30)+8(10)}{3+8} = 5.91 m/s^2[/tex]
Which event can be excluded from a list of interactions among Earth's spheres?
A solar flares
B volcanic eruption
C fracking for natural gas
D hurricane
A lawyer most likely has __________. a.spatial intelligence b.practical intelligence c.analytical intelligence d.creative intelligence
The type of intelligence required by a profession depends on its job description. Lawyers most likes have analytical intelligence.
A renowned psychologist named Howard Gardner devised a theory of multiple intelligence. This means that nobody is really not intelligent because a person must posses one or more of these multiple intelligence.
A lawyer has a lot to do with analytic reasoning and comparison of evidence to determine their validity. This task requires a strong analytical mind hence a lawyer requires analytical intelligence.
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Of the two forms of friction you studied,_____ friction is the one that must be overcome in order to start something moving.
Answer:
static friction will be your answer
Help pleaase
I'll brainliest the correct answer
Answer:
1) writing homework
2) Helping homeless people
3) Teaching
Explanation:
1)You can finish your homework by your skill.
2)You can help homeless people buy your working skill.
3) You can teach people by your educative skill.
Please give Brainliest
Find the area enclosed by a rectangle that is 1300 m wide and 1630 m long. Write your answer so that it has the correct number of significant figures.
Answer:
2120000m^2
Explanation:
1300* 1660 and there is 3 significant figures, so the 9 would make the round to a 2.
What two things form ionic bonds
Answer:
ionic bonds are formed between cations and anions
Explanation:
A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.
Evelyn learns that a sound wave can be recorded electronically as an analog signal or as a digital signal. She investigates these two signal types. She records her voice using a tape recorder, which uses an analog signal to produce sound when played back. She also records her voice using a computer, which uses a digital signal to produce sound when played back. Evelyn replays each recording 100 times.
a. Describe a difference that Evelyn would most likely hear between the two recordings after being replayed 100 times.
b. Explain why the two recordings would sound different after being replayed 100 times.
Answer:
can u help me with this too, i currently have it in an assignment and i dont know the answer
Explanation:
Find the 10 action words in the word puzzle
help me pls
I hope this helps.
Cheers.^^
(I could not find one of them, but the other nine are found.)
ai. What are ruminants?
aii. Give two examples of ruminants.
bi. What is force?
bii. State four effects of forces on a body.
biii. Mention three sub-atomic particles.
Ruminants are the mammals that can digest cellulose from plant and chew the cud
aii Cow and goat
bi A force is a push or pull upon an object resulting from the object interaction with another object
bii 1 Changes it's shape or size
2 To start moving
3 To stop moving
4 To accelerate or decelerate
biii Proton neutron and electron
Answer:
Same answer please. Hope it helps.
3. Electric cars are being rapidly developed to replace gasoline powered cars, but the problem is not easy because it is hard to find as good a way as gasoline for storing and transporting energy.
a. How much chemical energy in Joules are in 15 gallons of gasoline?
b. The energy capacity of batteries, such as used in the Tesla cars, are given in kW hrs. Their standard battery is 7.0 kW hrs and the cost is a substantial fraction of the price of the car. What capacity would a battery have to be equal to the energy in 15 gallons of gas?
To convert 15 gallons of gasoline to chemical energy in joule, multiply the figure above by 15 which is 1,800,000,000 Joules. Answer to b part is 60KWhrs
a.) A gallon of gasoline in most countries contain about 120 millions joule of chemical energy.
To convert 15 gallons of gasoline to chemical energy in joule, multiply the figure above by 15. That is,
Chemical energy = 15 x 120000000 = 1,800,000,000 Joules
b.) Also, the amount of energy cost per gallon of gasoline produced in most countries is equivalent to about 4 kilowatt hours. The capacity that would be equal to the energy in 15 gallons of gasoline that a battery should have will be
Capacity = 4 x 15 = 60 KWhrs
Therefore, the capacity a battery will have to be equal to the energy in 15 gallons of gasoline will be 60 KWhrs.
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how do mass and distance affect the force of gravity?
[tex]\color{Black}\huge{Answer} [/tex]
The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between objects.A 10 kg box of iPhones is pulled across a table by a horizontal force of 80 N with a frictional force of 10 N opposing the motion. Calculate the acceleration of the box
Compared to permanent magnets, why are electromagnets more useful in
many modern technologies?
O A. In permanent magnets, the strength of the magnetic field is more
consistent.
O B. To use an electromagnet, a power supply is not necessary.
O C. Strong permanent magnets are too large to use.
O D. By controlling the current, electromagnets can be turned on and
off.
We want to see why electromagnets are more useful in modern technologies.
We will see that the correct option is D:
"By controlling the current, electromagnets can be turned on and off."
An electromagnet is, as the name implies, a magnet that works with a power supply.
Why these are more useful than normal magnets?
Because you have more control over them. By controlling the current, you not only can turn it on and off, but you also could regulate the strength of the magnetic field.
This extra control is what makes the electromagnet a better option than a permanent magnet.
So the correct option is D: "By controlling the current, electromagnets can be turned on and off"
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pulls a wagon a distance of 32 meters the handle is above an angle of 20 degrees above horizontal if you pull on it with a force of 27 N what work is it
Hi there!
When finding work (J) given force (N), we use the equation:
W = FdcosФ <-- Only take into account the force in the direction of motion
Plug in the given values:
W = 27(32)cos(20) = 811.89 J
Explanation:
Here,
Given that,
pulls a wagon a distance of 32 meters the handle is above an angle of 20 degrees above horizontal if you pull on it with a force of 27 N
To find,
The total work doneAs we know that,
[tex]{\boxed{\sf{W=f.d.cos\theta }}}[/tex]
According to the question,
[tex]W=27(32)cos{20}\\\\w=811.89J[/tex]
pls help will give brainliest
Explanation:
the correct answer is Option 5.√½gh.
hope this helps you.
A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest potential energy?(1 point)
on the downswing as the person is dropping into the ramp
on the downswing as the person is dropping into the ramp
at the top of the ramp before dropping in
at the top of the ramp before dropping in
in the middle of the ramp at the lowest point
in the middle of the ramp at the lowest point
on the upswing as the person is coming up the other side of the ramp
Answer:
at the top of the ramp before dropping in
Explanation:
Potential energy is basically the build up of energy before it's released.
2. A cat chases a mouse across a 1.0 m high table. The mouse steps out of the way, and the cat slides off the table at a
speed of 5.0 m/s.
a. How long will it take the cat to hit the floor?
b. How far from the base of the table will the cat land?
Answer:
Below
Explanation:
Here is what we are given in the problem :
dy = - 1.0 m (this is negative because the cat falls)
Vx = 5.0 m/s
We can use this equation to find the time that it will take the cat to fall :
t = √-2dy / g
t = √-2(-1.0) / 9.8
t = √0.20408
t = 0.45 (round this to 2 sig figs)
t = 0.5 seconds
Now we can find dx (distance in the x direction)
dx = vx (t)
dx = (5.0m/s)(0.45s)
dx = 2.258769 m
dx = 2.3 m
Hope this helps! Best of luck <3
nếu tăng khoảng cách giữa hai điểm lên 4 lần thì lực tương tác tĩnh điện giữa chúng sẽ
Answer:
điện giữa chúng s
Explanation:
Convert the following to second
1minute
Answer:
60 seconds
Explanation:
bxdnfjrjrjjrjrjrj
PLS PLS HELP I'LL MARK YOU BRAINLISTTT!!!!
Answer:
i think it might be 5
sry if im wrong
Tape a piece of white paper to your wall.Aim the flashlight at the CD so that it makes the rainbow reflect onto your blank paper.
Answer:
where is the question girl
Jus need the answers <3
Answer:
blahhhhhh ummm
Explanation:
mark as brainlist pleaseeeee
what is the equation of universal law of garavitation
Answer:
[tex]F= \frac{GmM}{ {r}^{2} } [/tex]
G= gravitational constant
F= Gravitational force
m= mass of object 1
M= mass of object 2
r= distance between two objects
Carbon dioxide in the blood is removed from the body through the A. kidneys B. lungs C. mouth D. skin
Answer:
C) MouthExplanation:
When we inhale air, it contains oxygen. The lungs take in oxygen and the heart and the other body parts use it.Carbon dioxide is removed from the blood mouth when we exhale.Voyager 1 and Voyager 2. (Note that Plagiarism will result in an automatic Zero. Do not cut and paste. Put things in your own words. please.)
Your job is to research the following two famous satellites and report on the following information about both. Make sure to be specific about what information goes with with one.
1. When were they launched?
2. What were there purposes?
3. Which nation/s were involved in building them?
4. What information have they sent back to earth?
5. What did scientists put on them for extra terrestrial life to find? Make sure to list them and describe what they are and do.
6. Are they still working?
7. Where are they located and where are they going?
8. How fast are they traveling?
9. At least on interesting fact about each.
NEXT - Research at least 5 more satellites and find the following information about them.
1. When were they launched?
2. What were their purposes?
3. Which nation/s were involved in building them?
4. What information have they sent back to earth?
5. How much did they cost to build?
6. Are they still working?
7. Where are they located and where are they going?
8. How fast are they traveling?
9. At least on interesting fact about each.
10. Copy and past a picture of each onto your page.
The voyager program was a space exploration program created to be the first to travel and explore the outer reaches of our solar system and beyond.
The voyager space probes were launched in 1977 and are still functional to this day, making them the longest running space exploration mission. The purpose of the voyager space probes is to relay information back to earth on the various planets and interplanetary objects they fly by.
Through these missions, NASA has received information regarding:
Jupiter's cloud formations and storm systems Volcanic activity on the Jupiter moon of IoInteresting discoveries about the rings of Saturn Voyager 2 discovered a huge magnetic field surrounding Uranus 10 additional moons seen to orbit Uranusand much more, making it already an extremely successful mission.
The voyager spacecrafts were designed and built by the United States of America with government funding and contributions from other renowned space agencies.
As of 2021, voyager 1 is moving with a velocity of 61 thousand km per hour , with voyager 2 moving at roughly 55 thousand km per hour putting them beyond the outer reaches of the inner solar system. This along with the many important finds they are responsible for make them worth the 890 million dollars they cost to build.
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An object is moving 45 m/s and a mass of 34 kg , What is the kinetic energy?
Answer: KE = 34.425 kJ
Explanation:
KE = (1/2) mv^2
KE = (0.5)*(34kg)(45m/s)^2
KE = (0.5)*(34kg)(2025m^2/s^2)
KE = 34425 kg*m^2/s^2
1 Joule = 1 kg*m^2/s^2
KE = 34.425 kJ
What makes carbohydrates good at storing energy?
After we eat, our glucose levels rise when carbohydrates are fully broken down. This alarms beta cells (in the pancreas) to release insulin into our bloodstream and altogether insulin allows the glucose to enter our cells and be utilized for energy. Some carbs are used for energy and the rest is stored as fat!
Hope I helped in some way :)