mass = 20Kg
velocity = 10m/s
what is the kinetic energy
Answer:
kinetic energy = 1 / 2 mv²
kinetic energy = 1 / 2 × 20 × 10 ²
kinetic energy = 1000 joules
.........
Answer all of these questions and you will get the brain list
Answer:
1. Mechanical energy = 298.4 Joules.
2. Mechanical energy = 2140 Joules.
3. Mechanical energy = 0.2838 Joules.
Explanation:
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where,
P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Given the following data;
1. Kinetic energy = 182.2 J
Potential energy = 116.2 J
To find the mechanical energy;
Mechanical energy = kinetic energy + potential energy
Mechanical energy = 182.2 + 116.2
Mechanical energy = 298.4 Joules.
2. Mass = 40kg
Velocity = 3m/s
Height = 5m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the mechanical energy;
We would determine the kinetic and potential energy respectively.
K.E = ½mv²
K.E = ½*40*3²
K.E = 20*9
K.E = 180 Joules.
P.E = mgh
P.E = 40*9.8*5
P.E = = 1960 Joules
Mechanical energy = K.E + P.E
Mechanical energy = 180 + 1960
Mechanical energy = 2140 Joules.
3. Mass = 0.002kg
Height = 3m
Velocity = 15m/s
To find the mechanical energy;
K.E = ½mv²
K.E = ½*0.002*15²
K.E = 0.001*225
K.E = 0.225 Joules.
P.E = mgh
P.E = 0.002*9.8*3
P.E = = 0.0588 Joules
Mechanical energy = K.E + P.E
Mechanical energy = 0.225 + 0.0588
Mechanical energy = 0.2838 Joules.
An experiment is carried out to measure the extension of a rubber band for different loads.
Complete question is;
An experiment is carried out to measure the extension of a rubber band for different loads.
The results are shown in the image attached.
What figure is missing from the table?
Answer:
17.3 cm
Explanation:
The image attached showed values for load, extension and initial length.
Now, the first length there is 15.2 cm and as such it's corresponding extension is 0 because it has no preceding measured length.
The second measured length is 16.2 cm. Since it's initial measured length is 15.2 cm, then the extension has a formula; final length - initial length.
This gives: 16.2 - 15.2 = 1 cm
This corresponds to what is given in the table.
For the next measured length, it is blank but we are given the extension to be 2.1 cm. Now, since the initial measured length is 15.2 cm.
Thus;
2.1 cm = Final length - 15.2 cm
Final length = 15.2 + 2.1
Final length = 17.3 cm
If the mass of each ball is 12 kg and they experience a gravitational force of magnitude 2.00
x 10-7 N between them, what is the distance between the balls ?
Answer:
[tex] {2 \times 10} - 7 = 12 {}^{2} \div x \\ x = 2 \times 10 - 7 \div 12 {}^{2} [/tex]
I'm just in jss2 but I read physics. this is what I think
Select the correct answer.
Which gravitational force field diagram is drawn correctly?
A.
Answer:
B is the correct answer
Explanation:
Please answer this so you get the brainlist
Answer: Potential Energy
Explanation:
This picture is potential energy as the boulder is not quite moving yet, although due to the hill the boulder has the Potential to move when it is pushed down the hill.
A scooter acquires a speed of 36km/ h in 5s just after the start. Calculate the acceleration of the scooter
Answer:
We need to convert seconds to hours:
5s= (5/60)min= 0.08min=(0.08/60)h=0.001h
a=v/t=36/0.001=36.000km/h^2
Brainliest for correct answer :)
Answer:
B
Explanation:
The answer is b that is the final speed - initial speed divided by the time taken
Please mark as brainliest
list the factor that affect the speed of sound in gases
A player prefers to make high passes that lift the puck above the ice. Which stick should the
player choose?
Answer:
i dont know
Explanation:
hello
10 pointss
For a two way mirror to work properly, light must be ___ on one side and ____ through the other side
a. reflected - transmitted
b. refracted - absorbed
c. absorbed- reflected
d. absorbed- transmitted
Which graph best represents the relationship between KE and speed?
A graph with vertical axis K E and horizontal axis Speed with a straight line sloping sharply upward.
A graph with vertical axis K E and horizontal axis Speed with a concave line sloping sharply upward.
A graph with vertical axis K E and horizontal axis Speed with a straight line sloping sharply downward.
A graph with vertical axis K E and horizontal axis Speed with a curved line going first upward and then downward.
A graph with vertical axis K E and horizontal axis Speed with a straight line sloping sharply upward.
Relationship between kinetic energy and speedThe kinetic energy of an object is directly proportional to the square of its speed which means that if kinetic energy of an object increases the speed of that object is also increases and vice versa so we can conclude that graph with vertical axis K E and horizontal axis Speed with a straight line sloping sharply upward is the right answer.
Learn more about speed here: https://brainly.com/question/4931057
Answer:
The correct answer is:
B.)
Explanation:
I did the assignment on Edge, 2022.
(See the attachment below.)
Hope this helped, good luck on the quiz! :D
What volume of silver metal will have a mass of exactly 2.5 kg, given that the density of silver is 10.5 g/cm3? (Hint: Note the units of mass given and the units of density.)
Answer:
238.09 cm^3
Explanation:
V=mass/density
V=2500/10.5
V=238.09 cm^3
Students designed an experiment to determine the amount of calories in a chocolate chip cookie. A ring stand was used with a clean aluminum soda can hung from the ring that was partially filled with a known mass of water. A thermometer was placed inside the can so that it measured the temperature of the water but did not touch any part of the metal can. Once set-up was complete, an initial water temperature was taken. The cookie was then lit on fire and allowed to completely burn. A final temperature of the water was measured. Refer to the experimental set-up for calories in a chocolate chip cookie. How does this experiment allow students to measure the calories in a cookie
Answer:
Following are the solution to the given question.
Explanation:
Please find the graph image in the attachment file.
The heat is then transferred to water from the burned cake. The temperature difference is being used to calculate the heat energy of the cookie. Transfer of energy is the move in energy from place to place. Whereas the total quantity of energy may well be moved or converted – it is named energy preservation – does not change.
A 1610 kg car is traveling east at 22. m/s and a 3100. kg minivan traveling west at a speed of 11.0 m/s
collide head on. Assuming a completely inelastic collision, what is the velocity in m/s of the “connected”
vehicle after the crash?
Answer:
Im pretty sure its 11 m/s east because it is 22 m/s hitting 11 m/s and the force is harder hitting
Explanation:
im not 100% sure becasue i did this stuff a while ago
When electromagnetic (EM) radiation is explained using the particle model, which particle-like behavior could be described?
a. EM radiation has a wavelength.
b. EM radiation has a frequency.
c. EM radiation can exhibit interference patterns.
d. EM radiation can move through space without a medium.
Answer:
EM radiation has a wavelength.
Explanation:
When electromagnetic (EM) radiation is explained using the particle model, the EM radiation has a wavelength.
According to De Broglie, all matter has an associated wavelength which is better known as the De Broglie wavelength.
This wavelength is given by; given by λ=h/p
Where;
p = mv
h = Plank's constant
m= mass of the body
v = velocity of the body
p = momentum of the body
Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays.Electromagnetic radiation has a wavelength.
What is electromagnetic waves?Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays
When electromagnetic (EM) radiation is explained using the particle model, the EM radiation has a wavelength.
According to De Broglie, all matter has an associated wavelength which is better known as the De Broglie wavelength.
This wavelength is given by; given by
[tex]\lambda=\dfrac{h}{p}[/tex]
Where;
p = mv
h = Plank's constant
m= mass of the body
v = velocity of the body
p = momentum of the body
Hence Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays.Electromagnetic radiation has a wavelength.
To know more about electromagnetic waves follow
https://brainly.com/question/1968356
If two monochromatic light waves undergo destructive interference, the amplitude of the resultant wave is
Answer: The amplitude is 0. (assuming that the amplitude ot both initial waves is the same)
Explanation:
When two monochromatic light waves of the same wavelength and same amplitude undergo destructive interference, means that the peak of one of the waves coincides with the trough of the other, so the waves "cancel" each other in that point in space.
Then if two light waves undergo destructive interference, the amplitude of the resultant wave in that particular point is 0.
Answer:
No, the resulting wave in the diagram does not demonstrate destructive interference. The resulting wave in the diagram shows a bigger wave than Wave 1 or Wave 2. If it demonstrated destructive interference, it would be a smaller wave or a horizontal line. With destructive interference, waves break down to form a smaller wave, or cancel each other out, resulting in no wave formation.
Explanation:
edge
a car travels at a constant speed of 30km/h for .80h what is the total distance
Answer:
2400 km
Explanation:
30km for 1hr
Need up to 80 hrs , multiply both 80 and 30
So its 2400km
Michael is driving to Starbucks from his house. He walks 9 miles South to pick up his latte. He then drives 10 miles east to COHEA. What is the displacement of Devin?
Answer:
Displacement = [tex]13.45\ \text{miles}[/tex]
Explanation:
Given that,
Michael walks 9 miles South to pick up his latte. He then drives 10 miles east to COHEA.
We need to find the displacement of Michael. We know that displacement is the shortest path covered by the object. In this case, it is given by :
[tex]d=\sqrt{10^2+9^2} \\\\d=13.45\ \text{miles}[/tex]
So, the displacement of Michael is equal to [tex]13.45\ \text{miles}[/tex].
A glass window (n = 1.52) has a
uniform layer of ice on it (n = 1.31).
What is the critical angle for a ray
trying to pass from glass to ice?
(Water n = 1.33, Air n = 1.00)
(Unit = deg)
HELP PLSS!!
Answer: 59.5 deg
Explanation: In this problem, we are giving 1.31 as n2 and 1.52 as n1. Using the formula of critical angle= arcsine(n2/n1) we get the equation critical angle=arcsine(1.31/1.52) from there, you divide 1.31 by 1.52, and get 0.862.
On your calculator you then should press 2nd and then the sine button to get sine^-1 (arcsine) and in the parenthesis after arcsine put in 0.862, the answer you get will be 59.5.
Brainliest for correct answer :))
Choose the 2nd Option.....
Helppppp meeeeee pleaseeeeeeeee
5. You are running at your maximum speed of 6m/s to catch a bus which is
standing at the bus stop. The bus move off with an acceleration of 1m/s when
you are 20 m from it.
A. Can you catch the bus?
B. Show graphically.
80 POINTS, BRAINLIEST, AND QUESTION IS MULTIPLE CHOICE!!! (please answer quickly)
question:
If all matter has a gravitational force, why don’t two tennis balls on the ground move towards each other on their own?
A. The force of gravity from the tennis balls is too small.
B.The tennis balls are outside of each other’s gravity field.
C.The tennis balls are too small to produce any gravity.
D.There is too much friction between the balls and the ground
(the picture is just of the question)
Answer:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
Explanation:
I could be wrong but I would say B :)
Have a good day!
answer:
i believe the answer is d
explanation:
here's why;
c. is incorrect because everything has a gravitational force.
a. is also incorrect because gravity is what holds the tennis ball down and keeps it on the ground.
i don't really know how to explain why b. is wrong, but d. is the correct answer because the force of friction opposes the motion of an object, causing moving objects to lose energy and slow down.
good luck :)
i hope this helps
**please let me know if this was incorrect**
have a great day !!
what is magnetic field
Answer:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
Explanation:
Answer:
Explanation:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields surround magnetized materials, and are created by electric currents such as those used in electromagnets, and by electric fields varying in time.
A weight - lifter lifts a bell weighing 2 000 N and holds it in the air for 5 seconds. Has he done any work? Explain your answer.
Answer:
No, he hasn't done any work.
Explanation:
In this scenario, the weightlifter hasn't done any work because even though he lifted the bell for a specific period of time, he didn't cover any distance.
Mathematically, work done is given by the formula;
Work done = force * distance
[tex] W = F * d[/tex]
Where,
W is the work done
F represents the force acting on a body.
d represents the distance covered by the body.
Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
[tex] Power = \frac {Energy}{time} [/tex]
spheres are not perfect in space. But <> is in the cause of their shape.
Answer:
[tex] \boxed { \tt{gravitational \: pull(force)}}[/tex]
An object's speed is 0.8 m/s, and its momentum is 200 kg-m/s What is the mass of the object?
A. 250kg
B. 200kg
C.160kg
D.128kg
Answer:
A: The mass would be 250kg
Explanation:
In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. where m is the mass and v is the velocity. The equation illustrates that momentum is directly proportional to an object's mass and directly proportional to the object's velocity.
p= mv
m= p/ v
The explanation to that is:
momentum = mass× velocity
mass= momentum / velocity
THE ANSWER IS A
Hope this helps!
Explain why tissues in multicellular organisms are supplied with nutrients using a circulatory system.
Answer:
The tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes due the complexity of these activities
Explanation:
Multicellular organisms are organisms that are made of more than one cell. the more cells an organism has the more complex certain activities might be for the organism hence the tissues in a multicellular organism requires a circulatory system in other to deliver oxygen and food to the tissues while also removing carbon dioxide and metabolic wastes
1. If you add air to a flat tire through a single small entry hole, why does the air spread out to fill the tire?
Answer:
The tire fills up just like anything else that holds air when u pump a ball or tire up it fills all the way up cause it is a small confined space and after filling it with air the atoms of the air fill the tire up
Explanation: