PHYSICS HIGH SCHOOL

The gravitational potential energy of an object Is always measured relative to the

Answers

Answer 1
Answer:

The gravitational potential energy of an object Is always measured relative to the height of the object. It has the equation equal to mass PE = mgh where PE is the potential energy, m is the mass of the object, H is the height of the object and g is the acceleration due to gravity. 
Answer 2
Answer:

The gravitational potential of an object is always measured relative to reference level/another point

Further explanation

Energy is the ability to do work. Energy can change from one energy to another

Gravitational potential energy is the energy that an object has because of its position

The potential energy can be formulated:

Ep = m. g. h

E = potential energy of an object, joule

m = object mass, kg

g = gravity acceleration, m / s2

h = height of an object, m

The higher the object from the surface of the earth and the greater the mass, the greater the potential energy of the object. Earth's gravity also affects the potential energy of objects

Potential energy itself includes mechanical energy

Em = Ek + Ep

Em = mechanical energy

Ek = kinetic energy

Ep = potential energy

The amount of kinetic energy and potential energy of objects is always constant

Learn more

Determine how potential and kinetic energy changes at each position of the pendulum

brainly.com/question/7130792

Determine the mechanical energy

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the potential of an object when it falls from a height

brainly.com/question/2447300

the gravitational potential energy between moon and earth

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Keywords: the potential energy, kinetic energy, mechanical energy

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Which of the following tasks would be the best way to improve Benny’s sociability?a. Ask him to complete a chore every night.
b. Ask him to practice the flute once a week
c. Ask him to talk to people twice a day
d. Ask him to clean his desk three times a day

Answers

C. ASK HIM TO TALK TO PEOPLE TWICE A DAY.

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Light has properties of both a particle and a wave. true or false

Answers

true light has both the properties

Calculate the man’s mass. (Use PE = m × g × h, where g = 9.8 N/kg.)A man climbs a wall that has a height of 8.4 meters and gains a potential energy of 4,620 joules. His mass is about
kilograms

Answers

Answer:

mass=56.12kg

Explanation:

PE=mgh

4620=m×9.8×8.4

make msubject of the formula...

m =4620/(9.8×8.4)

m=4620/82.32

m=56.12kg

Megan wants to see if mice that are fed food A or B grow at a faster rate. She measures the mass of the mice on day 1, then divides them into two groups based on the type of food they will be given. She feeds each group the same amount of food at the same time each day. Does Megan have a control group in this experiment?

Answers

Answer:

No

Explanation:

It is an example of experimental group. Experimental group is defined as the group in an experiment under which each variable is tested, however, one variable is tested at a time.

On the other hand, control group is defined as the group which does not receive treatment by the researchers.

The only difference between the both group is that, under experimental group independent variable is changed but under control group it is held constant.
No, there is no control group because each group is treated under test conditions.

Calculate the net work done to accelerate a 1500 kg car from 10m/s to 20m\s

Answers


There are two ways to do this one.
In due consideration of 5 points, I have decided
to do it the easy way.

Kinetic energy = (1/2) (mass) (speed²)

The car's KE at the slower speed = (1/2 mass) x (10²)

                                                     =     75,000 joules .

The car's KE at the faster speed =  (1/2 mass) x (20²)

                                                     =    300,000 joules .

The difference in kinetic energy between
the slower and faster speeds =

                                       (300,000  -  75,000) = 225,000 joules.

THAT's the work that had to be done in order to accelerate
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The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. Which comparison is best supported by this information?

Answers

Answer;

The comparison that would be best is;

They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.

Explanation;

  • Beryllium (Be) is an element is the periodic table with an atomic number of 4, which means it has 4 protons in the nucleus and also 4 electrons in the energy levels, since the number of protons is equal to the number of electrons.
  • Beryllium has an electron configuration of 2: 2, which means it has two valence electrons, and has two energy levels which means it occupies period two of the periodic table, and group two of the periodic table.
  • Barium (Ba) on the other had, has an atomic number of 56, which means it has 56 protons and 56 electrons. Thus it has an electron configuration of; 2;8;18;18;8;2;  this shows that it has 6 energy levels thus occupies period 6 and is in group two since it has two valence electrons.
The atomic number of beryllium (Be) is 4, and the atomic number of barium (Ba) is 56. the comparison is best supported by this information is that beryllium has a lower atomic radius than Barium
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