Gravitational potential energy can be described as m*g*h (mass times gravity times height).
Originally,
15kg * 9.8m/s^2 *0.3 m = 44.1 kg*m^2/s^2 = 44.1 Joules.
After it is moved to a 1m shelf:
15kg * 9.8m/s * 1 = 147 kg*m^2/s^2= 147 Joules.
To find how much energy was added, we subtract final energy from initial energy:
147 J - 44.1 J = 102.9 Joules.
Answer:
B)
Explanation:
Negative (-) charge M will not move towards negative (-) charge K because, same charges will not attract each other in the given case
Negative (-) charge at the M tends to move towards positive (+) charge L in the direction of B) because opposite charges attract each other.
Answer:
Explanation:
A ) weight of air + weight of tank = 013.5 + 3.2
= 16.7 kg
volume of air
= 3.2 / 1.225 = 2.61 m³
= volume of water displaced = 2.61 m³
weight of water displaced = 2.61 x 1025
= 2675.25 kg
buoyant force = 2675.25 kg
buoyant force = weight of displaced sea water
= volume of displaced sea water x density
= 15.7 x 10⁻³ x 1025
= 16.0925 kg
net force = buoyant force - weight
= 2675.25 - 16.7
= 2658.55 kg
B ) net force will be in downward direction as weight is higher .
C ) weight of tank + weight of water in it
= 13.5 + 15.7 x 10⁻³ x 1025
= 13.5 + 16.0925
= 29.5925 kg
buoyant force = 16.0925 kg
net force = 29.5925 - 16.0925
= 13.5 kg
D ) net force down wards
where k=8.99e9
So (8.99e9)(-0.0085)(-0.0025)/(0.002)^2=4.7759e10N
Answer:
- Energy from sun travels to the earth by radiation of waves.
- Energy is the capacity to do the work whereas power is the rate of doing work or the rate of energy transfer.
- Energy always transforms from higher grade to a lower grade.
Positive feedback are not good when it disturbs the stability too much over a wide range.
No, negative feedback are not always bad because they enhance the stability of our system, resist the change in a system making it consistent and have a narrower range of variation.
Explanation:
The energy from the sun travels a huge distance in vacuum and atmosphere.
- The solar energy travels to the earth in the form of electromagnetic radiations which do not require any medium of transmission and are capable of travelling in vacuum by the mode called radiation. In this mode the packets of energy get directly transmitted from the source to its surroundings. This packet of energy is called quanta.
- Energy is the capacity to do work. Everything that we see and feel around us is some sort of energy. Every matter is the condensed form of energy the other forms that we cannot touch or feel is the wave form of energy. The wave form of energy stays in two form either stored in a mass or it is in transition. Now the concept of power arises form the energy in motion, power is defined as the rate of doing work or the rate of energy transfer. We usually use the term power for the energy in motion.
- We can burn a gallon of fuel only once because it undergoes a chemical change and the chemical changes are mostly permanent in nature. There is a certain direction to which the energy can flow spontaneously. When we burn the fuel then the stored chemical energy of the fuel gets converted into heat and light and the heat energy released during the combustion of the fuel is sufficient to further provide the heat of combustion of fuel.
- Energy always transforms from high grade to the lower grade and the converse is not possible spontaneously.
Positive feedback are not good when it disturbs the stability too much over a wide range.
No, negative feedback are not always bad because they enhance the stability of our system, resist the change in a system making it consistent and have a narrower range of variation.
