Energy Calculation 4. What is the gravitational potential energy of an object that has a mass of 100kg it is 10m off of the ground? The gravity on Earth is measured at 9.8N/kg

Answer:

There are two reasons why air pressure decreases as altitude increases: density and depth of the atmosphere. Most gas molecules in the atmosphere are pulled close to Earth's surface by gravity, so gas particles are denser near the surface.

Explanation:

Answer:

The final velocity of the bullet is approximately 3.795 m/s

Explanation:

The given parameters are;

The mass of the bullet, m = 5.0 g

The force applied to the bullet, F = 45 N

The distance over which the force is applied, d = 0.80 m

Therefore, we have;

The final kinetic energy of the bullet = = 1/2 × m × v² = The work done on the bullet by the 45 N force = F × d

Where;

v = The final velocity of the bullet

By substitution, we get;

The final kinetic energy of the bullet = 1/2 × 5.0 × v² = 45 × 0.8

1/2 × 5.0 × v² = 45 × 0.8

v² = (45 × 0.8)/(1/2 × 5.0) = 14.4

v = √14.4 ≈ 3.795

The final velocity of the bullet = v ≈ 3.795 m/s

depends on how high the school is. how high is it?

Explanation:

Answer:F=1.7802

Explanation:

Since we've been given the mass to be .18kg,we are asked to find the Force of which the formulae is

F=ma where f-force,m-mass and a-acceleration due to gravity

So we can just substitute

F-?.m=.18 and a9.89

F=.18×9.89

F=1.7802N

The gravitational force on Earth due to the ball will be 1..769 N . While the  Earth's resulting acceleration will be 2.9 ×10²³ m/sec².

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force

The given data in the problem is;

m is the mass of ball=0.18 kg

F is the gravitational force=?

m is the mass of earth= 6.0 x 1024 kg.​

r is the radius of earth = 6.3781×106 m

G is the universal gravitational constant= 6.67408×10-11 Nm/kg2

The gravitational force is given by;

[tex]\rm F_G=\frac{ G m_1m_2}{r^2} \\\\ \rm F_G=\frac{ 6.67 \times 10^{-11} 0.18 \times 6.0 \times 10^{24}}{6.3781\times 10^6)2}[/tex]

[tex]\rm F_G= 1.769 N[/tex]

Hence the gravitational force on Earth due to the ball will be 1..769 N.

The force is given as the product of mass and acceleration. So that the value of acceleration is found by;

[tex]\rm a= \frac{F}{m} \\\\ \rm a= \frac{1.769}{6.0 \times 10^{24}}[/tex]

[tex]\rm a= 2.9 \times10^{-23}[/tex] m/sec²

Hence the  Earth's resulting acceleration will be  2.9 ×10²³  m/sec².

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Answer:

Explanation:

•Scientists have found that the rocks that make up the seabed are hidden in their "threads". This strip contains a record of the rotation of the Earth's magnetic field. The rocks on the seabed contain iron. ... When the rock cools down, the iron fragments inside align with the direction of the Earth's magnetic poles.

Answer:

b

Explanation:

Answer:

C

Explanation:

Opposites attract, the north pole of one of the magnet is attracted to the south pole of the other magnet. Two north or south poles will repel away from each other.

The north pole of one magnet is near the South pole of the other magnet.

The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other. This is called attraction.

"A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets."

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Answer: constructive interference

Explanation: plz mark Brainly

Answer:

constructive interference

Explanation:

a p e x :))

Answer:

5,730 years

i literally took a test on this question yesterday, lol

Explanation:

Hopefully this helped, if not HMU and i will try my best to get u a better answer, and if u need help with anything just let me know and i got u! :)

Answer:

5.5 to 7 Mohs

Explanation:

Glass ranks around 5.5 to 7 Mohs, but sapphire crystal has a hardness of 9 Mohs, making it only slightly less hard than diamond.

Answer: 5.5

Explanation:

Several hardness scales have been developed to catalog the materials (specifical minerals), being the Mohs scale the best known. This scale, proposed by the German geologist Friedrich Mohs in 1825, consists of a ratio of ten minerals numbered in increasing order by hardness, from least to greatest.

i hope it will help you

Explanation:

density to the amount of wood in a unit , per volume of wood. the ratio of dry weight and green volume of the given wood is basic wood density.

Answer:

Electricity?

Explanation:

Answer:

B. heat and kinetic energy

Explanation:

Heat is a form of energy that flows with respect to temperature difference. Thus, heat energy would flow from an object with higher temperature to that at lower temperature. It generally cascades from a high temperature body to lower temperature body through a medium or when in contact.

Kinetic energy is the energy that is inherent in a moving object. Thus, it can be converted to other forms or transferred between objects. Example, a moving object can transfer part of its kinetic energy to an object at rest on collision. This may cause the motion of the initial stationary object.

Therefore, heat and kinetic energy can be used to describe transfer of energy to or from a substance.

Answer:

W = 320 [N]

Explanation:

In order to solve this problem, we must take into account that weight is defined as the product of mass by gravity.

[tex]W=m*g[/tex]

where:

W = weight [N] (units of Newtons)

m = mass = 200 [kg]

g = gravity acceleration = 1.6 [m/s²]

The mass is always conserved, independent of the location of the body in space.

[tex]W = 200*1.6\\W = 320 [N][/tex]

answer:- external force is 2 N .

The force that impacts the ball motion is external force i.e. 2N.

Given that,

Based on the above information, the calculation is as follows:

= 7N - 5N

= 2N

This 2N represents the external force.

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When the mass of the cannon increases and the energy of the blast remains the same, the total kinetic energy remains the same.

Kinetic energy refers to the form of energy that an object possesses due to its motion. It is known as the work that's required to move a body.

It should be noted that when there is an increase in the mass of the cannon while the energy of the blast remains the same, then in such a situation, the total kinetic energy will remain the same.

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Explanation:

B. leads to muscle strain.

Answer:

Option A. 0.36 m/s to the left

Explanation:

From the question given above, the following data were obtained:

Force resistance (Fᵣ) = 55.2 N

Applied force (Fₐ) = 31.8 N

Mass (m) = 65.2 kg.

Acceleration (a) =?

Next, we shall determine the net force acting on the skateboarder. This can be obtained as illustrated below:

Force resistance (Fᵣ) = 55.2 N

Applied force (Fₐ) = 31.8 N

Net force (Fₙ) =?

Fₙ = Fᵣ – Fₐ

Fₙ = 55.2 – 31.8

Fₙ = 23.4 N to the left

Finally, we shall determine the acceleration of the skateboarder. This can be obtained as follow:

Mass (m) = 65.2 kg.

Net force (Fₙ) = 23.4 N to the left

Acceleration (a) =?

F = ma

23.4 = 65.2 × a

Divide both side by 65.2

a = 23.4 / 65.2

a = 0.36 m/s

Since the net force acting on the skateboarder is to the left. Therefore, the acceleration of the stakeholder will also be towards the left (i.e 0.36 m/s to the left)

Answer:

A. 0.36 m/s to the left

Explanation:

an echo mimics exactly what is said, this is like a mirror because when you look in a mirror every action you make is copied by your reflection

Answer:

The average speed during the trip is 6.16 [tex]\frac{km}{hour}[/tex]

Explanation:

Speed ​​is a physical quantity that expresses the variation in position of an object and as a function of time. In other words, speed expresses the relationship between the space traveled by an object, the time used for it and its direction.

The speed can be calculated by the expression:

[tex]Speed=\frac{distance}{time}[/tex]

Aaron rode his bike home for 1.6 hours at 6.5 km/h and another 15 minutes at 4 km/h. So, the distance in each of the stages can be calculated as, taking into account that 60 minutes= 1 hour:

So:

Then:

[tex]Speed=\frac{11.4 km}{1.85 hours}[/tex]

[tex]Speed=6.16\frac{km}{hour}[/tex]

The average speed during the trip is 6.16 [tex]\frac{km}{hour}[/tex]

Answer:

The Equivalence Principle of Gravity

Explanation:

The fact that objects fall to earth at the same speed is called the Equivalence Principle of Gravity.

According to the Equivalence Principle of Gravity, all things fall at the same rate when there is little to no air resistance. The value of the acceleration caused by gravity is demonstrated by the force of gravity equation to be a constant that is independent of the mass of the item.

According to Einstein's equivalence principle, it is unnecessary to distinguish between gravitational and inertial forces because they are comparable in nature.

Therefore, the Equivalence Principle of Gravity states that all objects descend to Earth at the same rate.

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Answer:

Time = 1.44 minutes

Explanation:

Given that the circumference of the wheel is 1250 m, which is the distance to be covered.

Thus,

speed =

distance = 1250 m, speed = 12 m/s.

So that;

12 =

time =

       = 104.16667

time = 104.17 s

But, 60 seconds = 1 minute

time = 1.4417

       = 1.44 minutes

The time required for one trip around the wheel is 1.44 minutes.

Answer:

The protons must feel a repulsive force from the other neighboring protons. This is where the strong nuclear force comes in. ... If they can't get that close, the strong force is too weak to make them stick together, and other competing forces (usually the electromagnetic force) can influence the particles to move apart.^o^

Answer:

Because, they are of the same charge that is, + and +, + can't go with another +.

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Answer:

1.6L

Explanation:

Given parameters:

Initial volume  = 1.5L

Initial temperature  = 5°C  = 5 + 273  = 278K

Final temperature  = 30°C = 30 + 273  = 303K

Unknown:

Final or new volume  = ?

Solution;

Since pressure is constant, we simply apply Charles's law to solve this problem.

Using the expression below,

          [tex]\frac{V_{1} }{T_{1} }[/tex]   = [tex]\frac{V_{2} }{T_{2} }[/tex]

V and T are volume and temperature

1 and 2 are initial and final states

  Insert the parameters and solve;

         [tex]\frac{1.5}{278}[/tex]   = [tex]\frac{V_{2} }{303}[/tex]

          278V₂  = 1.5 x 303

                V₂  = 1.6L

Answer:

B. 59 kg

Explanation:

From the graph you notice that a linear relation in indicated by the line joining the points such that the points on the line represent the data that show a correct relationship in the experiment.

This means that the point outside the line has an error .

This point is the value 59 kg that does not align with other values which are included in the graph.

Answer:

59kg

Explanation:

Answer:

The displacement is 145 m in the north direction and the distance is 355 miles.

Explanation:

The distance traveled by a mobile is the length of its trajectory and it is a scalar quantity. In other words, distance refers to the space traveled by an object during its movement. It is calculated as the sum of all the distances traveled. In this case:

250 miles + 105 miles= 355 miles

On the other hand, displacement refers to the distance from a start position to an end position regardless of the travel. That is, like distance, displacement is a measure of length. Instead, the displacement is a vector quantity that depends on the direction, so it is described from the magnitude and the direction.

Mathematically, the displacement d is calculated as:

d = df - di

where df is the final position and di is the initial position of the object.

In this case:

displacement= 250 miles - 105 miles= 145 miles

Since the north distance is greater than the south distance, then the displacement is 145 m in the north direction and the distance is 355 miles.

Answer:

Velocity= Distance divided by time divided by degree or direction.

Explanation:

Speed=DIstance divided by time

9514 1404 393

Answer:

  12.  x = 11; sides are 29

  13.  x = 5; sides are 25

Explanation:

12. The marked sides are equal length, so ...

  3x -4 = 2x +7

  x = 11 . . . . . . . . add 4-2x

  2x+7 = 2(11)+7 = 29 . . . side lengths

__

13. The marked sides are equal length, so ...

  6x -5 = 5x

  x = 5 . . . . . . . add 5-5x

  5x = 5(5) = 25 . . . side lengths