Answer:
3
Explanation:
Kylie has a mass of 54 kg and is jogging at a velocity of 3 m/s what is Kylie’s kinetic energy?
Do machines create less work? Example: pulley system
Answer:
Technically, no the work of building machines is hard but in the long run, Yes they are easier after they're built.
Explanation:
In how many ways can chemical reaction takes place? what are they?
Answer:
Chemists classify chemical reactions in a number of ways: by type of product, by types of reactants, by reaction outcome, and by reaction mechanism. Often a given reaction can be placed in two or even three categories, including gas-forming and precipitation reactions.
Explanation:
mark me as brainliest thank you
A computational model predicts the maximum kinetic energy a roller coaster car can have given its mass, the speed at the highest point of its journey, and the height of the highest point. The mass is 250 kg, and the highest point of the journey is at 30m, where the cart is at rest. What is the maximum kinetic energy?
A. 113500 J
B. 468750 J
C. 0 J
D. 73500 J
Answer:
D
Explanation:
The decrease in potential energy is equal to the increase in kinetic energy.
mgh
250 x 9.8 x 30
=73, 500
Answer:
73,500 J
Explanation:
100% Correct
The most important characteristic in designing the soundproof room is to create walls that
Answer:
make sound bounce off walls
Answer:
Explanation:
Walls that absorb the sound and dont just bounce or reflect the sound straight back. Like how video makers have foam walls with ridges on their walls.
Which element most likely interacts with water the same way lithium interacts with water?
Answer:
Is there a multiple choice or select all that apply? I would say Potassium (K) or Sodium (Na)
Explanation:
The atomic number tells us the...
Number of protons
Atomic mass
Number of electrons
Number of neutrons
Please help, I'm marking the person with the correct answer Brainliest!
I am giving 20 points!
Answer:
The atomic number tells us the number of protons.
Explanation:
Hope this helps and I hope u have an Amazing day!!
How do we obtain data about the properties of exoplanets and objects in our solar system?
Answer:
Doppler effect to analyze the motion and properties of the star and planet.
Explanation:
The radial velocity method invovles watching the spectral lines of a star as a planet orbits around the star. Because of the planets gravitational pull on the star, will wobble. This causes Doppler shifts in the spectral lines, allowing astronomers to infer the presence of the planets.
Help!! Or I get an F!!!
What planet could you jump the highest?
Answer:
Is Mercury an answer on your thing?
Explanation:
Mercury has the least amount of gravity, so therefore you can jump the highest on Mercury.
Answer:
Jupiter
Explanation:
Jupiter has more than 300 time the mass as earth. so, it's gravitational pull is stronger.
Hopefully this helps
An object that is experiencing two vertical forces (upwards and a downwards) is moving downward with a constant speed. What can be concluded about the strength of the two forces?
Answer:
Both upward and downward forces are equal
Explanation:
When an object is acted upon by two vertical forces ; upward and downward, and the object moved at a constant speed, then the net force acting upon the object is zero(upward force + downward force = 0). This is because an object will only move at a constant velocity if the opposing forces cancels each other out. Since the falling object is already in motion, and maintaining a constant velocity, there is no for required to keep the body in motion and as such the Velocity at which the body is moving remains constant.
INTEGRATED SCIENCE-8th grade science
Please help report cards are due for me at dec.18
Answer:
Our drinking water comes from lakes, rivers and groundwater. For most Americans, the water then flows from intake points to a treatment plant, a storage tank, and then to our houses through various pipe systems. A typical water treatment process.
Explanation:
What is a material that can dissolve in another material called?
Slippery
Physical
Soluble
Insoluble
Answer:A material that can dissolve in another material called Soluble
Explanation:
Answer:
Option 3.
Soluble is the correct/best answer choice.
PLS HELP BEING TIMED!!!
Which equation represents the law of conservation of energy in a closed system?
KEi + PEi = KEf + PEf
PEi + PEf = KEi + KEf
KEi – KEf = PEi – PEf
KEi – PEf = PEi – KEf
Answer:
[tex]K_{i}+U_{g,i} = K_{f}+U_{g,f}[/tex]
Explanation:
A closed system is a system where exists energy interactions with surroundings, but not mass interactions. If we neglect any energy interactions from boundary work, heat, electricity, magnetism and nuclear phenomena and assume that process occurs at steady state and all effects from non-conservative forces can be neglected, then the equation of energy conservation is reduce to this form:
[tex]\Delta K +\Delta U_{g} = 0[/tex] (1)
Where:
[tex]\Delta K[/tex] - Change in kinetic energy of the system, measured in joules.
[tex]\Delta U_{g}[/tex] - Change in gravitational potential energy of the system, measured in joules.
If we know that [tex]\Delta K=K_{i}-K_{f}[/tex] and [tex]\Delta U_{g} = U_{g,i}-U_{g,f}[/tex], then we get the following equation:
[tex]K_{i}+U_{g,i} = K_{f}+U_{g,f}[/tex] (2)
Where [tex]i[/tex] and [tex]f[/tex] stands for initial and final states of each energy component.
Hence, the right answer is [tex]K_{i}+U_{g,i} = K_{f}+U_{g,f}[/tex]
Answer:
KEi + PEi = KEf + PEf
Explanation
right on edge 2020
A transverse and longitudinal wave combine to form what kind of wave?
a sound wave
a radio wave
an electromagentic wave
a surface wave
3 Kyra and Pari are timing how long it takes for 1 g of sugar to dissolve in hot water.
Kyra records a time of 24.3 seconds. Pari records a time of 24 seconds. Whose reading
is more precise? Why?
Answer:
Kyra is more precise.
Explanation:
Kyra is more precise as she has included the exact point second it had dissolved whereas Pari just rounded it to the closest number making her write a whole number that was rounded down.
A steel beam is rotated in a horizontal plane to provide the centripetal acceleration for training pilots. If the pilot sits 2.19 m from the center of rotation, at what speed must he rotate in order to experience a horizontal centripetal acceleration of 65.8 m/s/s?
Given :
Pilot sits 2.19 m from the center of rotation.
Horizontal centripetal acceleration is 65.8 m/s².
To Find :
The angular velocity of the pilot .
Solution :
We know, centripetal acceleration is given by :
[tex]a = \omega^2 r\\\\\omega = \sqrt{\dfrac{a }{r}}\\\\\omega = \sqrt{\dfrac{65.8 }{2.19}}\\\\\omega = 5.48\ s^{-1}[/tex]
Hence, this is the required solution.
Jake and Amir are both standing on identical skateboards and
perform a physics experiment in which they push off one
another to move. Jake is taller and more massive than Amir. If
Jake pushes with 20 N of force, what force would he feel
backwards away from Amir? F= N
Answer: 20
Explanation:
If Jake pushes with 20 N of force, the force that he would feel backwards away from Amir is 20N
Force simply means the strength or energy that can later the position of an object. Force can also be described as a push or pull.
It should be noted that since Jake pushes with 20 N of force, the force that he would feel backwards away from Amir will be the exact force that was used in pushing.
This will therefore be 20 Newton as well.
Read related link on:
https://brainly.com/question/18038995
Explain you own words why energy is considered to be naturals money. Give an example to support your explanation
Answer:
because we naturally use energy everyday in everyway , energy is also a bill for instance you electric bill used by energy
Explanation:
Why was basketball invented?
Question 4 of 10
Which option is a good blackbody radiator?
O A. A lightbulb
O B. A balloon
O C. A person
O D. A mirror
SUBM
Answer:
A lightbulb
Explanation:
Answer:
Lightbulb
Explanation: got it right
we now the Earth is round .but .the earth is moving .but also some time we go to the under when the earth is moving .but why we cant fall?
Answer:
lol bruhh wat a question
We donot feel any of this motion because these speed are constant. The spining and orbital speed of earth stay the same so we don't feel any acceleration or deceleration. You can only feel motin if your speed change.
Hope it's Help!
2. The purpose of using ice on an injured area is... *
to increase blood flow.
O to hydrate an injury.
O to reduce blood flow.
O to dilate blood vessels.
1. A large ocean liner floating in the sea has a volume of
375 000 m² and displaces 50 000 m² of sea water. Determine the
density and mass of the ship. Explain why, despite being made
of metal, the ship is able to float.
Answer:
Density of the ship :133.33 kg/m³
Mass of the ship :50,000,000 kg
Ships are able to float on water because they displace a volume that equals their own weight
Explanation:
The formula for density is ;
Density = Mass/Volume
But the mass of displaced fluid is give by the formula;
m=ρV where ρ is density of the fluid and V is volume of water displaced
Volume of liner= 375000 m³
Volume displaced = 50000 m³
The volume of the water displaced is equal to mass of the liner
I m³ = 1000 kg
50000 m³ = 50000*1000 =50,000,000 kg
50,000,000 kg ----------mass of the ship
So if ;
m= 50,000,000 kg
v= 375000 m³
ρ = m/V
ρ = 50,000,000/375000
ρ = 50,000,000/375000
ρ =133.33 kg/m³
Ships are able to float on water because they displace a volume that equals their own weight. Additionally, the air contained in the spaces of the ship inside is much less dense than density of water aiding in the floating process.
How does a salt differ from an acid or base?
Answer:
An acid is defined as a substance whose water solution tastes sour, turns blue litmus red and neutralizes bases. A substance is called base if its aqueous solution tastes bitter, turns red litmus blue or neutralizes acids. Salt is a neutral substance whose aqueous solution does not affect litmus
How do invasive species impact long term biodiversity in an economy?
Answer:
Invasive species alter and degrade the environment, and have a negative effect on both native species and the people who live and work there. The impacts of invasive species include: Reduced biodiversity. Decreased availability and quality of key natural resources.
Explanation:
Hope this helps!
Could somebody please explain the Coriolis effect? Thank you! (also the subject is physical science but that wasn't an option so I just put physics)
Answer:
The Coriolis Effect makes things appear to move in a curve around our planet, like, for example, a plane. This is also due to the fact that our Earth is round, so nothing really moves in a straight line. It is "an effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation."
Explanation:
Each tyre of a car has an area of 100 cm2 in contact with the ground. The car has a mass of 1600 kg. The weight of the car is equally distributed amongst the four tyres.The gravitational field strength g is 10 N / kg.What is the pressure exerted on the ground ?
A. 4.0 N/cm2
B. 16 N/cm2
C. 40 N/cm2
D. 160 N/cm2
The pressure exerted on the ground is 40 N/cm². Hence, option (C) is correct.
What is pressure?It is the ratio between the force being applied and the surface area being applied to. The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure.
SI unit of pressure is Pascal or Newton/meter².
Given parameters:
Mass of the car: m = 1600 kg.
Gravitational field strength: g = 10 N/kg
Area of each tyre of car: a = 100 cm²
Hence, total force applied by the car = mg = 1600 × 10 Newton = 16000 Newton.
As the weight of the car is equally distributed amongst the four tyres; force applied on each tyre = 16000 Newton/4 = 4000 Newton.
Hence, the pressure exerted on the ground = force/area
= 4000/100 N/cm²
= 40 N/cm²
hence, option (C) is correct.
Learn more about pressure, refer the link:
https://brainly.com/question/12971272
#SPJ2
What two processes are part of electromagnetism? A. The production of a magnetic field by an electric current B. The production of a magnetic field by permanent magnets C. The attraction of electric charges for each other D. The production of an electric current by a moving magnet
Two processes, the magnetic field production by electric current and electric current production by moving magnets are part of Electromagnetism.
Electromagnetism:
It is a branch of physics in which scientists study the electromagnetic force. Or in simple words studies the interaction of electric and magnetic field.
This includes the production of magnetic field from the electric current and electric current from moving magnet.
The study of magnetic field of a permanent magnet is part of magnetism while the attraction of electric charges by each other is studied under electrostatics.
Therefore, two processes, the magnetic field production by electric current and electric current production by moving magnets are part of Electromagnetism.
To know more about Electromagnetism:
https://brainly.com/question/13803241
A jet aircraft is traveling at 262 m/s in hor-
izontal flight. The engine takes in air at a
rate of 85.9 kg/s and burns fuel at a rate of
3.92 kg/s. The exhaust gases are ejected at
921 m/s relative to the aircraft.
Find the thrust of the jet engine.
Solution :
Speed of the air craft, [tex]$S_a$[/tex] = 262 m/s
Fuel burns at the rate of, [tex]$S_b$[/tex] = 3.92 kg/s
Rate at which the engine takes in air, [tex]$S_{air}$[/tex] = 85.9 kg/s
Speed of the exhaust gas that are ejected relative to the aircraft, [tex]$S_{exh}$[/tex] =921 m/s
Therefore, the upward thrust of the jet engine is given by
[tex]$F=S_{air}(S_{exh}-S_a)+(S_b \times S_{exh})$[/tex]
F = 85.9(921 - 262) + (3.92 x 921)
= 4862635.79 + 3610.32
= [tex]$4.8 \times 10^6 \ N$[/tex]
Therefore thrust of the jet engine is [tex]$4.8 \times 10^6 \ N$[/tex].
When you put on the brakes of your bike, the wheels stop
turning. Then friction between the wheels and the road slows
your bike to a stop. Which type of friction is this?
a static friction
b sliding friction
ċ fluid friction
d rolling friction
7t?
Check it
Answer:
b
Explanation:
ibecause the wheels are sliding on the ground i think