Answer:
A
Contact forces are forces that require the actual contact (touching) of two pieces of matter. ... A field force is a force that works at a distance. No touching is required. Gravity is a good example of a field force, because it works whether or not an object is touching something or touching nothing at all.
Answer:
HEAT FLOWS INTO THE SURROUNDING FROM THE SYSTEM AND THE SIGN OF THE SYSTEM WILL BE POSITIVE.
Explanation:
This is so of an endothermic reaction and the contraction of the gas is an endothermic one because the total heat content of the products formed is more than that of the reactants and the gas therefore absorbs heat from the surrounding during the contraction. An endothermic reaction is one in which heat is absorbed from the surroundings and the change in heat content ΔH of is positive.
The reaction for the contraction of the gas produces + 10 J of heat.
Density=mass÷volume
density=40.5÷15=2.7
Answer:
2.4681 m/s
Explanation:
= Mass of cannon ball = 29 kg
= Mass of performer = 65 kg
= Initial Velocity of cannon ball = 8 m/s
= Initial Velocity of performer = 0 m/s
v = Velocity of combined mass
As the linear momentum of the system conserved
The recoil velocity is 2.4681 m/s
A common application of the wave/particle duality of ligt is in the technology of the solar panel.
<h3>Photoelectric effect</h3>
One of the greatest breakthroughs of mordern physics is the establishment of the fact that light could both behave as a light and a particle. The ressearch into the particle nature of light gave rise to the phenomenon of the photoelectric effect.
Now, a very popular application of this is in the solar panel where light impinges on a metal panel which is connected to a battery that can be used to store charges.
Learn more about photoelectric effect:brainly.com/question/9260704