Answers
Answer:
Rubbing his hand and ironing is Mechanical Energy being transformed into Thermal Energy.
Throwing a rock vertically in using Kinetic Energy, it then transforms into Gravitational Energy as the rock falls.
Explanation:
First, as Kwane rubbing his and and iron his clothes using the energy to create heat, that is thermal being transformed.
The rock being thrown uses kinetic energy and due to graviational force of the earth, it is being transformed into Potential Gravitational Energy.
Related Questions
How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 90 m at a speed of 90 km/h ?
Answers
Answer:
The coefficient of static friction will be 0.7Explanation:
Given data
the radius of curve= 90m
speed v= 90 km/h to m/s = (90*100)/60*60= 25 m/s
we know that the expression for the centripetal force acting on the car
[tex]Fc= \frac{mv^2}{r}[/tex]-------1
we also know that the expression for the frictional force between road and tire.
Ff= μmg--------2
Equating equation 1 and 2 we have
μmg= mv^2/r
μ= v^2/gr
substituting the values of speed and radius we have (assuming g= 9.81m/s^2)
μ= 25^2/9.81*90
μ= 625/882.9
μ= 0.7
i need help i don’t understand
Answers
Answer:
precise
Explanation:
im pretty sure
How can positive feedback influence the stability of a system?
A. It can cause the system to remain stable as long as inputs are
constant
B. It can cause the system to oscillate between stability and
instability
c. It can cause instability that eventually results in the system's
destruction
D. It can cause instability by reversing the direction of the system,
Answers
The positive feedback influence the stability of a system is: It can cause the system to remain stable as long as inputs are constant. Hence, option (A) is correct.
What is stability ?A body's capacity to return to its initial static equilibrium after being slightly shifted is referred to as stability.
A body in equilibrium doesn't suffer linear acceleration or a turning effect, and unless a force from the outside disturbs it, it will stay in that state forever. (The First Law of Newton)
When tiny, externally induced displacements from an equilibrium result in forces or torques that tend to oppose the displacement and bring the body back to its initial equilibrium, the equilibrium is said to be stable.If even the smallest deviations result in forces or torques that tend to increase the displacement, the equilibrium is said to be unstable.Learn more about stability here:
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Answer:c
Explanation:got it wrong bc the other person didn’t know bc their small minded
Is velocity constant in uniform motion?
Answers
The Direction of the Velocity Vector
Objects moving in uniform circular motion will have a constant speed. Velocity, being a vector, has both a magnitude and a direction. The magnitude of the velocity vector is the instantaneous speed of the object.
What is the kinetic energy of a 150 kg object that is moving at a speed of 5
m/s?
Answers
Answer:
Kinetic Energy=1/2×m×v^2,Where m=mass,v=velocity. So, kinetic energy of the object=1/2×150×15^2 = 16875 kg m^2 s^-2 .
Explanation:
math lol
a kid is running at an average speed of 6.8mi/h. how long does it take this kid to run a mile? convert to meters
Answers
Answer:
t = 8.82 minutes
Explanation:
The average speed of an object is given bu the total distance covered divided by total time taken.
The average speed of a kid is 6.8 mi/h
Let t is the time taken by this kid to run a mile, d = 1 mile
[tex]v=\dfrac{d}{t}\\\\t=\dfrac{d}{v}\\\\t=\dfrac{1\ \text{miles}}{6.8\ \text{mi/h}}\\\\t=0.147\ \text{hour}[/tex]
or
t = 8.82 minutes
So, it will take 8.82 minutes to run a mile.
A cliff diver from the top of a 100 (m) cliff. He begins his dive by jumping up with a velocity of 5 (m/s) a. How
long does it take for him to hit the water below? b. What is his velocity right before he hits the water?
Answers
Answer:
A.) 4.81 seconds
B.) 44.6 m/s
Explanation:
He begins his dive by jumping up with a velocity of 5 (m/s).
Let us first calculate the maximum height reached by using third equation of motion
V^2 = U^2 - 2gH
At maximum height, V = 0
0 = 5^5 - 2 × 9.8H
19.6H = 25
H = 25 /19.6
H = 1.28 m
The time taken for the diver to reach the water from the maximum height can be calculated by using second equation of motion.
Where height h = 1.28 + 100 = 101.28 m
h = Ut + 1/2gt^2
As the diver drop from maximum height, U = 0
101.28 = 1/2 × 9.8 × t^2
4.9t^2 = 101.28
t^2 = 101.28/4.9
t^2 = 20.669
t = sqrt ( 20.669)
t = 4.55s
As the diver jumped up, the time taken to reach the maximum height will be
Time = 1.28 / 5 = 0.256
The time taken for him to hit the water below will be 0.256 + 4.55 = 4.81 seconds
B.) Velocity right before he hits the water will be
V^2 = U^2 + 2gH
But U = 0
V^2 = 2 × 9.8 × 101.28
V^2 = 1985.09
V = 44.6 m/s
A.) The time taken should be 4.81 seconds
B.) The velocity should be 44.6 m/s
Calculation of the time taken and velocity:Here we used third equation of motion
V^2 = U^2 - 2gH
At maximum height, V = 0
Now
0 = 5^5 - 2 × 9.8H
19.6H = 25
H = 25 /19.6
H = 1.28 m
Here the second equation of motion.
Here height h = 1.28 + 100 = 101.28 m
So,
h = Ut + 1/2gt^2
Since the diver drop from maximum height, U = 0
So,
101.28 = 1/2 × 9.8 × t^2
4.9t^2 = 101.28
t^2 = 101.28/4.9
t^2 = 20.669
t = sqrt ( 20.669)
t = 4.55s
Now
Time = 1.28 / 5 = 0.256
Finally the time should be
= 0.256 + 4.55
= 4.81 seconds
B.)
We know that
V^2 = U^2 + 2gH
But U = 0
So,
V^2 = 2 × 9.8 × 101.28
V^2 = 1985.09
V = 44.6 m/s
Learn more about velocity here: https://brainly.com/question/19279241
HELP PLEASE THIS IS DUE RIGHT NOW. What is the difference between constant acceleration and instantaneous acceleration?
Answers
Instantaneous acceleration is the rate at which velocity changes at a specific instant in time. For example: at one point it might be 8m/s^2 and at another point 13m/s^2
Which pair of quantities represent scalar quantities, and how are they different from vector quantities?
A. energy and velocity
B. displacement and velocity
C. displacement and time
D. distance and time
Answers
D.
They don't have directions.
The quantities with only magnitude and no direction are called scalar quantities. Therefore, option D is the correct answer.
Scalar quantities have only magnitude but vector quantities have both magnitude and direction. Some examples of scalar quantities are,
• Mass
• Temperature
• Speed
• Density
Thus, we conclude that the quantities with only magnitude and no direction are scalar quantities. Hence option D is the correct pair.
Learn more about scalar quantities here:
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define liquid in matter
Answers
Answer:
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds.
Question 2 of 10
Which statement best describes how vomiting can help an animal maintain
homeostasis?
A. It keeps the animal's body temperature within a certain range.
B. It rids the body of something harmful.
C. It prompts the animal to eat healthy food.
D. It uses up excess energy in the body.
Answers
Answer:
I would say B. It rids the body of something harmful.
Explanation:
Vomiting usually tries to get rid of something bad in your stomach. If you vomit when your sick its because its trying to get rid of that sickness.
Hope this helps >:3
Answer:
B. It rids the body of something harmful.
Explanation:
which sI units are combined to describe force?
Answers
Answer:
Symbol N
Explanation:
The SI unit of force is the newton, symbol N
The units of mass, length, and time are.
The combination is the unit of force, called the "Newton".
1 Newton is the force that accelerates 1 kilogram of mass at the rate of 1 meter per second every second.
A moving object is in equilibrium. Which best describes the motion of the object if no forces change?
O It will change directions.
O It will slow down and stop.
O It will maintain its state of motion.
O It will speed up and then slow down.
Answers
Answer:
It will maintain its state of motion
Explanation:
The object would maintain its state of motion.
What does it mean when an object is in equilibrium?If the size and direction of the forces acting on an object are exactly balanced, then there is no net force acting on the object and the object is said to be in equilibrium.
What does equilibrium mean in physics?Equilibrium, in physics, the condition of a system when neither its state of motion nor its internal energy state tends to change with time.
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Please someone helppp me.. I will mark as brainliest.
Answers
Answer:
b) G.P.E = Mgh
300j = M x 10 m/s² x 15 m
300 j/ 10 m/s² x 15 m = M
300j/ 150 s² = M
2kg = M
c) K.E = 1/2 m v²
K.E = 1/2 (50) (50)²
K.E = 1/2 (50) (2500)
K.E= 125000/2
K.E = 625 000 J
name the three States of matter
Answers
Answer:
[tex] \fbox{ \sf { \: Solid \: , \: Liquid \: and \:Gas}}[/tex]
Explanation:
[tex] \star[/tex] Let's learn about matter.
We see different kinds of things around us. Some of these are wood , book , salt , beaker , sugar , water , milk , oil, rubber and water vapour. All these things occupy space and have mass as they are matter. Anything that occupies space and has weight is called matter.
[tex] \star[/tex] States of Matter
Solid , liquid and gas are the three states of matter.
[tex] \hookrightarrow{ \text{ \underline{ Solid}}}[/tex]
Different things have different sizes and shapes but a particular thing has a fixed shape and size. The things which have definite size and definite shape are solids. Stone , word , ice , glass etc are some examples of solid.
[tex] \hookrightarrow{ \text{ \underline{ Liquid}}}[/tex]
The things having a definite volume but no definite shape of their own are called liquids. Water ,milk , petroleum , oil etc are as common examples of liquid.
[tex] \hookrightarrow{ \underline{ \text{Gas}}}[/tex]
The things which have neither a definite volume not a definite shape of their own are called gases. The bases take the shape and the size of the vessels in which they are enclosed. Air , smoke , water vapours , hydrogen gas are some examples of gases.
[tex] \sf{Hope \: I \: helped !}[/tex]
[tex] \sf{Best \: regards !!}[/tex]
~[tex] \text{TheAnimeGirl}[/tex]
Is the answer C or B
Answers
Answer:
c
Explanation:
though c is wider it has more water.
The answer is *C* Because The C Jar is Wider than others so it holds more water
If R1 is 2 ohms and R2 is 3 ohms and R3 is 5 ohms...what is total resistance?
R1
R2
R3
W
M
I
I
o a
1 ohms
Ob
10 ohms
Ос
8 ohms
HEEELLLLLPPPPPPPP
Answers
Answer:
10 ohm
Explanation:
Since the resistors are arranged in series, their total resistance is their sum.
Hence, Total R = 2+3+5 = 10 ohm
What allows negative feedback to control a system?
A. The system slows down when input is reduced.
B. The system speeds up when output is increased.
C. The system has parts that sense the amount of input O
D. The system has parts that sense the amount of output.
Answers
Answer: It's D.
Explanation:
I just did it.
The system has parts that sense the amount of output, allows negative feedback to control a system. Option D is correct.
What is system?A system is a collection of interconnected or interacting pieces that follow a set of rules to produce a coherent whole.
The limits, structure, and purpose of a system, which is surrounded and impacted by its environment, are characterized and expressed in its functioning.
A feedback system helps the system to work in the productive way. Negative comments might help you get back on track. It allows you to view projects and activities in a new light.
It allows you to learn, grow, and improve anything from your own talents to the project you're working on right now.
The system has parts that sense the amount of output, allows negative feedback to control a system.
Hence, option D is correct.
To learn more about the system, refer to the link;
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an athlete runs around a 400m race track four times it takes him 400s to complete his run
Answers
Answer: its taking him 100s to run around the track once
Explanation:
using the following choice identify the choice that the best describe homeostasis.
1-maintaining internal balance
2-energy
3-unequal distribution
4-diffusion
Answers
Answer:
maintaining internal balance
Explanation:
this question is in biology not physics
Describe three common issues that affect societies across places and times
Answers
Answer
Common issues that affect societies across places and times include healthcare, disease, natural disasters, drought, unemployment, racism, war, pollution, over-use of resources, selecting leaders, high taxes, education, and relationships with other countries.
When the mass of an object decreases, the force of gravity - Remains Unchanged - Decreases - increases - Becomes irregular
Answers
Answer:
Decreases
Explanation More mass=More gravitational pull
Less mass=Less gravitational pull
Hope this helps
Answer:
decreses
Explanation:
1.A body of certain mass is kept at a height of 15m from the ground, taking the value of g as 10m/s find out the mass of the body when it posses the energy of 300J.
2. A boy runs at a velocity of 50m/s. If he has the mass of 50kg what will be the energy possessed by him?
Answers
Answer:
1.#potential energy = PE, m = mass in kg, g = force of gravity, h= vertical height above the ground. ** means to the power of ie exponent. * means multiply.
PE = mgh
300 = m(10)(15)
m = 300/(10)(15)
m= 2kg
2. KE = 1/2 mv**2
= 1/2(50)(50)**2
= 2500 joules
Explanation
Is as in solution
Select the positive statement that would BEST counteract this negative statement: "I do not have the time to exercise." A. I can exercise anywhere. B. I have to start somewhere. C. I will make it a priority. D. I will increase my energy. Please select the best answer from the choices provided. A B C D
Answers
Answer:The awnser would be C!
Explanation:
Hope this helped!
Answer:
C. I will make it a priority.
Explanation:
Plz help
Among one litre boiling water and a red hot glowing nail, which one has more
amount of heat and why?
Answers
The water. Take the specific heat of steel, estimate the volume of the nail, you know the volume of the water, which has a specific heat of one. Or be obvious. If you dropped a red hot nail into a liter of cold water, what would happen?
Answer:
Water
☆One litre boiling water has more amount of heat because it has much more greater mass than iron nail
I am not sure if its wrong,sorry
but here is the iron nail explanation also
☆A red hot nail has more amount of heat because the density of iron is more than that of water
Please Help! Im dumb.
Two completely different compounds may contain identical elements.
True or False
Answers
Match the object to the type of motion it's displaying. which letter goes with which number?
A. linear motion
1. the propeller of an aircraft in midair
2.a car driving up a winding mountain road
B. rotational motion
C. curvilinear motion
3. music being played on a stringed instrument, such as a guitar
4.runners sprinting across a straight track
D. vibrational motion.
Answers
Hello There!!
I think the best answer choice is:
A. [tex]Linear[/tex] [tex]motion[/tex]
B. [tex]Rotational[/tex] [tex]motion[/tex]
D. [tex]Vibrational[/tex] [tex]motion[/tex]
4. [tex]Runners[/tex] [tex]sprinting[/tex] [tex]across[/tex] [tex]a[/tex] [tex]straight[/tex] [tex]track[/tex]
C. [tex]Curvilinear[/tex] [tex]motion[/tex]
3. [tex]Music[/tex] [tex]being\\\\\\[/tex] [tex]played[/tex] [tex]on[/tex] [tex]a[/tex] [tex]stringed[/tex] [tex]instrument,[/tex] [tex]such[/tex] [tex]as[/tex] [tex]a[/tex] [tex]guitar[/tex]
2. [tex]A[/tex] [tex]car[/tex] [tex]driving[/tex] [tex]up[/tex] [tex]a[/tex] [tex]winding[/tex] [tex]mountain[/tex] [tex]road[/tex]
1. [tex]The[/tex] [tex]propeller[/tex] [tex]of[/tex] [tex]an[/tex] [tex]aircraft[/tex] [tex]in[/tex] [tex]midair[/tex]
I'm not sure this is 100% right....
P.S Tell me if this is wrong....
[tex]Hope This Helps[/tex] [tex]Sangwoo!![/tex]
#[tex]Be[/tex] [tex]Bold[/tex]
# [tex]Always[/tex] [tex]Brainly[/tex]
A.linear motion is runners sprinting across a straight track
B. rotational motion is the propeller of an aircraft in midair
C. curvilinear motion is a car driving up a winding mountain road
D.vibrational motion music being played on a stringed instrument, such as a guitar
What is a uniform circular motion?It is defined as motion when the object is moving in a circle with a constant speed and its velocity is changing with every moment because of the change of direction but the speed of the object is constant in a uniform circular motion
Hence, runners sprinting across a straight track is a type of linear motion, the propeller of an aircraft in midair is performing the rotational motion, a car driving up a winding mountain road is a curvilinear motion, music being played on a stringed instrument, such as a guitar is a type of vibrational motion
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Why do the tall structures fall off the ground so easily?
Answers
Answer:
Structures that are tall or skinny are generally less stable, making them more likely to fall when exposed to lateral forces, whereas ones that are shorter or wider (at the base) are generally more steadfast.
Explanation:
hey can anyone pls help me out in dis!
Answers
Answer:
A. Liquid becomes a gas.
Answer:
A
Explanation:
Water changes to liquid because hydrogen bonds are constantly formed and broken as the water molecules slide past each other. The breaking of these bonds is caused by the motion (kinetic energy) of the water molecules due to the heat contained in the system.
differences between a pair of scissors and nailcutter
Answers
Answer:
Different classes of levers
Explanation:
The main difference between a pair of scissors and nailcutters is that they are different classes of levers. Scissors are made from two class 1 levers, meaning that the effort is exerted at one end and the load at the other with the fulcrum in the middle. This is because we press one end together (the handles) so we are applying the effort, and the other side closes from the fulcrum in the middle.
Nailcutters on the other hand, consist of two class 2 levers. This means that the fulcrum is on the opposite end to the effort with the load in the middle. This is because we press down on one side and the two parts move closer together.
Hope this helped!