The kinetic energy of the cell phone before it hits the ground given the data is 9 J
Data obtained from the question Mass (m) = 0.08 Kg Velocity (v) = 15 m/sKinetic energy (KE) =?How to determine the kinetic energy
The kinetic energy of the cell phone can be obtained as follow
KE = ½mv²
KE = ½ × 0.08 × 15²
KE = 0.04 × 225
KE = 9 J
Thus, the kinetic energy of the cell phone is 9 J
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The kinetic energy right before it hits the ground is 0.6 J
Kinetic EnergyKinetic energy is the energy possessed by a body in motion. The S.I unit is Joule. Kinetic energy depends on:
The mass of the bodyThe velocity of the bodyGiven that a 0.08 kg cell phone falls off a table at 15 m/s, its
kinetic energy right before it hits the ground can be calculated by using the formula;
K.E = 1/2 x m x [tex]v^{2}[/tex]
The given parameters are:
mass m = 0.08 kg
velocity v = 15 m/s
Substitute the parameters into the formula
K.E = 1/2 x 0.08 x 15
K.E = 0.6 J
Therefore, its kinetic energy right before it hits the ground is 0.6 J
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True or false: In order to create a sound wave, work must be done.
True - Because a sound wave carries energy; to propagate energy, energy must be applied for the sound wave to carry energy.
Which color of visibe light has a lower frequency than orange light
red having the frequency of 4.62 and at its limit 4.29 has the lowest frequency. It is the lowest before orange which has 5.00.
PLEASE HELP
Which of the following best describes the relationship between kinetic energy
(movement) of particles/molecules and temperature?
As kinetic energy decreases, temperature increases.
kinetic energy ingreases, temperature also increases.
Kinetic energy has no
effect on temperature.
As kinetic energy increases, temnerature
Answer:
As the kinetic energy increases, temperature also increases
Select all the correct answers.
When people use plastic combs on their hair, the combs become negatively charged. Which statements about this situation are true?
The comb loses electrons.
The comb gains electrons.
The hair loses electrons.
The hair gains protons.
The hair loses protons.
Answer:
so therefore, the comb gains electron and the hair losses electrons
Explanation:
It is known that electron contain a negative charge.
So, when an atom gain electrons then number of electrons within the atom increases. As a result, the atom acquires a negative charge.
But when an atom loses electrons, there will be deficiency of electrons within the atom. As a result, the atom becomes positively charged.
Hence,, when people use plastic combs on their hair, the combs become negatively charged. The situation which is true about this is the comb gains electrons and the hair loses electrons.
Are there more Wheels or Doors in the world?
(only wheels that turn on an axel)
Move 13 m west and then 8 m east?HELP!!!
Answer:
Displacement will be 5m west
Distance would be 21m No direction
Through which of the following would sound travel fastest?
A) Outer space
B) The atmosphere
C) Ocean water
D) A railroad track
Answer: ??? D? dont quote me on it tho <3
Explanation:
Answer:
B
Explanation:
Suppose you want to calculate how much work it
takes to life a 180 N barbell. Besides the mass of the
a
barbell, what other information do you need to
Mass is not necessary the main thing we need is Displacement
As
W=FDOr
Work done=Force×DisplacementThe amount of work done is calculated as the force exerted to remove a object to D distance .
A modern automobile engine creates various harmful gasses, but much of the emissions end up being harmless—especially once the car has been running for about five minutes on a temperate day. Attached to the exhaust pipe of a car is a device consisting of platinum and palladium coated onto a ceramic surface (beads or a honeycomb shape). What would you guess is going on here? Why might the device only work well after a car has been running for a while? Assess how you think factors such as temperature, concentration and the presence of a catalyst affect the rate of a chemical reaction in this scenario.
The factors influencing the rate of chemical reaction are concentration of the reactant,Surface area and physical condition of the reactants, Temperature, and catalyst.
What is a chemical reaction?One or more compounds, known as reactants, are transformed into one or more distinct substances, known as products. Such a process is known as a chemical reaction.
Following are the factors Influencing the rate of chemical reaction;
1. Concentration of the reactant.
The reaction is usually accelerated by increasing the concentration of one or more reactants. This occurs because a higher concentration of a reactant results in more collisions with that reactant in the same amount of time.
2. Surface area and physical condition of the reactants.
The pace of reaction is limited by the surface area of the in contact phases if reactant molecules reside in different phases, as in a heterogeneous mixture.
3. Temperature.
The rate of reaction is typically accelerated as the temperature rises. As the temperature rises, the average kinetic energy of the reactant molecules increases.
4. Catalyst
A catalyst is a substance that aids in the process without being ingested.
Catalysts provide a second reaction pathway for the production of goods. They play a crucial function in a variety of biological processes.
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Two astronauts of mass 100 kg are 2 m apart in outer space. What is the
force of gravity between them? (G= 6.67 x 10-11 N·m2/kg?)
O A. 3.33 x 10-7N
O B. 1.67 x 10-7N
х
O C. 3.33 x 10°N
-
O D. 1.67 x 10°N
SUBMIT
Answer:
solution here
The correct anwer isB .
A driver parks his car on a hill but forgets to put
the brakes on. The car starts to roll down the hill
Which of the following energy transformations
occurs as the car rolls down the hill?
Answer:
Both potential energy and kinetic energy are involved.
Explanation:
As the car is rolling, its potential energy decreases and its kinetic energy increases.
Assuming momentum was conserved, Jimmy and Kevin and their roller coaster car do not appear to slow down at all. How is it that the momentum was conserved when the bug collided with Jimmy, but there was no apparent change in speed?
Owing to the fact that the speed of the cars did not change, the momentum of the objects will not change.
What is momentum?Momentum refers to the product of mass and velocity. According to the laws of conservation of linear momentum, momentum is conserved before and after collsion.
Owing to the fact that the speed of the cars did not change, the momentum of the objects will not change after collsion even thpough momentum is conserved.
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is the fastest launch coaster in the world, launching its 3864 kg trains to 240 km/h (149 mph) in 4 seconds. This means its rate of acceleration is 16.67 m/s/s. How much force was required to do this?
Answer:
64 412 .88 N
Explanation:
F = ma
= 3864 kg * 16.67 m/s^2 = 64412.88 N
what can you observe about c02 concentrations over the course of a year
What is the absolute potential at apoint which is 15cm from an isolated point charge q=_3×10^_7c in vacuum
Answer:
q = 1
Explanation:
q-3/10-(7/10)=0
3 7
(q - ——) - —— = 0
10 10
What are data?
A. Pieces of information recorded in an experiment
B. Sources that summarize a primary source
C. Educated guesses about the outcome of an experiment
D. Variables that are adjusted by the experiment
Answer:
educated guesses about the outcome of an experiment
a proton and an electron enter the same magnetic field
Answer:
Incorrect
Explanation:
the Proton and electron do not enter the same magnetic field
the Electron is opposite of the Proton.
So if u have a magnet with a side with Proton and a side with electron they would attract
if they are two of the same, they will separate
ur welcome:)
correct me if i’m wrong
brainliest please?
An Elevator system uses a weight of a math of 1200 kg in order to raise the elevator
Calculate the area under the line (integrate)
Quite easily you would know that Work done is force times displacement. So by finding the area under the line he could easily tell the work done
Jordan is using a graph to solve this problem, and the last step in the process would be to calculate the area under the line. The answer is option D.
What is an area under the line?
In the context of graphs, the area under the line refers to the area enclosed between a line on a graph and one of the axes. The area can be calculated by finding the product of the base of the shape formed by the line and the axis, and the height of the shape, which is the vertical distance between the line and the axis.
For example, in a force-displacement graph, the area under the line represents the work done by the force on an object as it is displaced. By finding the area under the line on this graph, you can calculate the amount of work done on the object by the force.
Here's a brief explanation of the steps involved in solving this problem using a graph:
Step 1: Draw the axes for a force vs. displacement graph.
The x-axis represents displacement and the y-axis represents force. Mark the point where the weight is released (displacement = 0, force = 0) and the point where it falls 45 meters (displacement = 45, force = 1,200 * g, where g is the acceleration due to gravity).
Step 2: Draw the line on the graph.
Draw a straight line connecting the two points on the graph.
Step 3: Calculate the gravitational force.
Calculate the force due to gravity acting on the weight by multiplying its mass (1,200 kg) by the acceleration due to gravity (9.81 m/s^2):
F = m * g
F = 1,200 kg * 9.81 m/s^2
F = 11,772 N
Step 4: Calculate the area under the line.
The area under the line represents the work done on the weight by gravity. To calculate this area, we need to find the area of the triangle formed by the line and the x-axis:
Area = (base * height) / 2
Area = (45 m * (1,200 * g) N) / 2
Area = 26,460 J
Therefore, the work done on the weight by gravity when it falls 45 meters is 26,460 J. The correct option is D i.e Calculate the area under the line.
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A stone is dropped from top of a tower. If it takes 6 sec to hit the ground, find the height of tower and velocity with which the stone hits the ground ?
Answer:
Explanation:
s = ut+ 0.5at²
u = 0
t = 6
a = 9.81
s = 0 + 0.5 * 9.81 * 36 = 176.58 m
v = u + at
v = 9.81* 36 = 353 m/s
What is the difference between a scaler and vector quantity?
Answer:
A scalar quantity is a quantity that has magnitude but does NOT have direction. An example is speed.
While a vector quantity is a quantity that has BOTH magnitude and direction. For example, force.
Complete the sentence: Congruent means ____________________.
too long
opposite
uneven
equal
Answer:
equal
Explanation:
If all three corresponding sides are equal and all three corresponding angles are identical in measure, two triangles are said to be congruent. These triangles can be slides, rotated, flipped and turned to be looked identical. If repositioned, they coincide with each other. The symbol of congruence is' ≅'.
Congruent means equal, as it is a term used to describe two or more objects or figures that have the same shape and size.
When two or more figures or things have the same size and shape, they are said to be congruent.
When we state that two things or figures are congruent, we mean that their lengths, angles, and proportions are all the same.
The idea of congruence is that there should be no distinction or contrast between the things being compared. It denotes complete equality and a perfect match.
Congruence informs us that all geometric shapes, including line segments, angles, triangles, and others, are the same and can be placed on one another without overlap or gaps.
Thus, a fundamental idea in geometry called congruence enables us to evaluate and contrast geometric forms and their characteristics.
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All of the following use subjective scoring EXCEPT:
A. Diving
B. Figure Skating
C. Archery
D. Gymnastics
All of the following use subjective scoring EXCEPT Archery.
Subjective scoring is an important and powerful tool you can use to add assessment items that are not easily scored.
Archery is scored based on point values that is assigned to the rings made on the target. Others are not point scoring sports.
Thus, all of the following use subjective scoring EXCEPT Archery.
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(Measurement of Resistance) Current causes the temperature of a real resistor to increase. Why? What effect does this heating have on the resistance? Explain.
Resistance in the wire increases when the temperature of the wire is increases.
What effect does this heating have on the resistance?Heating the metal conductor causes atoms to vibrate more that makes more difficult for the electrons to flow through the conductor and thus increasing resistance.
So we can conclude that resistance in the wire increases when the temperature of the wire is increases.
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Two converging lenses are separated by 27.0 cm. The focal length of each lens is 8.90 cm. An object is placed 33.0 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right.
Answer:
1/i + 1/o = 1/f thin lens equation
i = 33 * 8.9 / (33 - 8.9) = 12.2 cm to right of first lens
27 - 12.2 = 14.8 cm to left of second lens
i = 14.8 * 8.9 / (14.8 - 8.9) = 22,3 cm to right of second lens
What must be true in order for magnetism to induce an electric current in a wire?
Answer:
The wire must be part of a closed circuit.
Explanation:
A closed circuit in electric is what we called a wire that has a complete electrical connection in which electricity flows, where electric current flow from one end to another, in order for magnetism to induce an electric current the circuit has to be closed, or no current will flow.
Why does the book with more mass feel heavier in your hand
Answer:
because the book's is covered by papers
The attraction or repulsion between charges is known as _____.
electric charge
electric force
magnetism
the electric field
Answer:
Okay
It is electric charge
If one examines the stars on a really dark night away from the glare of city lights, some stars appear distinctly reddish in color and other appear brilliant blue. why does this happen?
Answer: The stars do not shine brighter than the sun.
Explanation: The sun is the brightest star
Now
For brilliant blue
Every star has their solar systemsMany plants move around themWhen one of the planets come in between our sight and that star that glimpsesa ship's sonar sends messages and receives the echoes from the ocean bottom 0.6 seconds after the sound is sent down from the ship.how Deep is the water beneath the ship? (Given speed of sound in still water = 1450m/s)
Answer:
Speed of Sound = 2D
Time
Where D is the depth of water
2D = Speed × Time
2D = 1450m/s × 0.6s
D = 1450m/s × 0.6s
D
Depth D = 870m
A ray of sunlight is passing from diamond into crown glass; the angle of incidence is 35.80°. The indices of refraction for the blue and red components of the ray are: blue (ndiamond = 2.444, ncrown glass = 1.531), and red (ndiamond = 2.410, ncrown glass = 1.520). Determine the angle between the refracted blue and red rays in the crown glass.
Answer:
N1 Sin θ1 = N2 Sin θ2 Snell's Law
For blue light
Sin θ2 = N1 / N2 sin 35.8 = 2.444 / 1.531 * .5850 = .9339
θ2 = 69.04 deg
For red light
Sin θ2 = 2.410 /1.520 * .5850 = .9275
θ2 = 68.05 deg
The separation is .01 deg