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stepladder [879]
3 years ago
14

A 6.7 kg object moves with a velocity of 8 m/s. what is its kinetic energy

Physics
2 answers:
blagie [28]3 years ago
3 0

The Correct answer to this question for Penn Foster Students is: 214.4 J

marta [7]3 years ago
3 0

Answer:

E_k=214.4 J

Explanation:

Kinetic energy is a form of energy, known as motion energy. The kinetic energy of an object is that produced by its movements, it depends on the mass and speed of the object.  In formula form:

E_k= \frac{1}{2} m v^2

m=Mass\hspace{3}of\hspace{3}the\hspace{3}object\\v=Velocity\hspace{3}of\hspace{3}the\hspace{3}object

Replacing the data provided, the kinetic energy is:

E_k=\frac{1}{2} (6.7)(8^{2} )=214.4J

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A cat runs and jumps from one roof top to another which is 5 m away and 3 m below. Calculate the minimum horizontal speed with w
icang [17]
ThIs is the same type of problem
find out the time value
3 = 1/2*a*T^2
6/10 = t^2
t = 0.77 seconds
and the distance is given 5 m
thus speed ,= distance/time
speed = 5/0.77
= 6.45 m/s
6 0
3 years ago
a teacher drives from school to the mall. then she goes to the doctors office for a physical examination. what is the magnitude
Amanda [17]

The magnitude of the teachers displacement is the difference between

the location of the school and the location of the doctors office

The reason behind the above expression are explained as follows

The known locations of the teacher;

Initial location; The school

Second location; The mall

The eventual location; The doctors office

The required information;

The magnitude of the teachers displacement

The method of obtaining the displacement of the teacher;

Qualitatively, the displacement of the teacher can be obtained by applying the definition of displacement as follows;

The definition of displacement is an object's change in position, given by the difference between its start and finish locations

According to the definition of displacement, therefore, the magnitude of

the teachers displacement is the distance between the school and the

doctors office which is given by the difference between the coordinates of

the location of the school and the location of the doctors office

The magnitude of the displacement of the teacher = The coordinate of the location of the doctors office - The coordinate of the location of the school

Learn more about displacement here;

brainly.com/question/17587058

5 0
3 years ago
What would happen if the amount of light reaching the Earth from the sun were cut in half? Predict what the climate and life wou
kicyunya [14]
A lot would happen depends on which perspective you look at it from. Less incoming solar radiation means that there is a greater possibility of the surface temperature of earth reducing. there would be a cooling effect. And it could be major cooling in certain part of the world depending on milankovitch cycles. We know that the amount of light or solar radiation that reaches the earth is unequal in different parts of the world because of the obliquity, eccentricity, and precession of the earth. But, in general you would most likely see a cooling trend around the world and in some parts it would be extreme. In Canada or in the North is general, winters would become even more cooler or colder... winters would become longer perhaps, And summers would 've cooler. on the contrary to what most believe, you would most likely see a decline in precipitation such as snow or rain because this is mostly caused or intensified by warming temperatures. Life would be probably very similar to that of the Pleistocene epoch. how would humans respond to this change... Well most likely they would try to use their tech to control weather because they already do to a smaller proportion.

hope that helps a bit! :)
5 0
3 years ago
Which would take a longer time to warm up, a piece of brass or a piece of marble, given that both
diamong [38]

Answer:

Explanation:

specific heat of marble is 880 J/kg °C

specific heat of brass is 920 J/kg °C

If Q heat is given to a body of mass m and specific heat s , and there is a rise of temperature t

Q = m s t

t = Q / m s

if Q and m is constant

t is inversely proportional to specific heat .

so rise in temperature will be inversely proportional to specific heat .

lower the specific heat , higher  will be the rise in temperature . Since marble has lower specific heat , rise in temperature in marble will be higher and quicker .

So brass will take longer time to warm up.

7 0
3 years ago
I know the answer is supposed to be 20.7, but how?
Colt1911 [192]
Is the number the whole thing equal to 1?
6 0
3 years ago
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