Answer:
76
At what angle height and range of projectile are equal?
It means that the range of the projectile with a given initial velocity is same for a pair of projection angles θ and 90° – θ.
Answer:
15. 4
16. 1
17. 2
18. 2
Explanation:
15. Consumers in the food chain are ranked according to what they eat. More specifically , they are organised into primary, secondary and tertiary consumers, depending upon what they consume for food. Primary consumers eat mostly plants, and are usually herbivores, tertiary consumers are top predators in the food chain.
16. Decomposers break down dead animals and plants. They are usually bacteria or other small fungi. They play the important role of recycling nutrients from dead matter back into the land. E.g. back into the soil where nutrients can be taken up by plants
17. Food webs are usually extremely complex in nature, with a variety of interactions of different organisms that are of different strengths and importance for the entire food web. Food webs are a good conceptual analysis, but practically are not simple to draw up into a simple web
18. The incorrect statement is that energy travels in both directions in a food web. Energy travel in a food web can be represented in a pyramid, which shows that energy at the bottom of the pyramid is greater than at the top. Energy is lost at every layer of the pyramid from producers up to the tertiary consumers at the top
- Kinetic Energy of an object is the measure of the work an object can do by virtue of its motions..
- Where KE is the kinetic energy, m is the body’s mass, and v is the body’s velocity.
- Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts..
Where,
. m is the mass in kilograms
. g is the acceleration due to gravity
. h is the height in meters
Hope it helpz~ uh..
Storage form of energy:
- Potential energy
- Nuclear energy
- electrical energy
- thermal energy
- magnetic energy
Potential energy:
All stationary objects are having potential energy stored in it. This energy can be transferred in form of kinetic energy when it comes in the motion from rest. Example, An object placed at height h having potential energy in it. When it comes in motion from the rest the potential energy is converted into kinetic energy.
Nuclear energy:
Nuclear energy is energy that is stored in nucleus of any element. Example, fusion reaction on sun gives earth solar energy.
Electric energy:
Electrical energy is due to movement of the electrical charges. Example, In elctrical batteries electrical energy is stored.
Thermal energy:
Thermal energy is the internal energy of a substance that is transferred to other substance in the form of heat. Example, on heating water is a beaker stem energy is developed.
Magnetic energy:
Magnetic energy is the potential energy stored in the magnetic field. Example, using magnetic energy electric field is produced according to Faraday's law.