The standard states of elements are the forms that they adopt at a temperature of 25°C and pressure of 1 atmosphere. These forms of the elements are the reactants in the formation equations of multi-element substances. The heat of formation (∆Hf°) of an element in its standard state is zero
Answer:
a) 245 N
b) 392 J
c) 196 W
Explanation:
a) Force needed to lift the 25 kg object is the same as the weight of the object:

b) Work is the force exerted times the distance moved:

c) The power exerted is the quotient of the work done over the amount of time it took to move the object:
In order to understand the results of another scientist's work, any scientist
who reads the report MUST understand the measurement system in which
the result is described. Otherwise the result is meaningless to him.
Answer:
10N/kg...................
Answer:
Paint can which is placed higher than other can will have more potential energy. Because according to the definition of the potential energy an object placed at some higher place when released to the ground will have greater impact than the one placed at some lower place. Painter can give the other can more potential energy by placing it at some height greater than the other cans.
Explanation:
To understand this, we need to understand the concept of potential energy.
Let’s assume two objects A and B. If A is placed at 10 meters above the ground and if B is placed 20 meters above the ground then according to the definition of potential energy, object B will have greater potential energy.
Similarly, in our question, we have paint cans, one is carried at some higher place through a ladder by the painter will have greater potential energy as compared to the one which is placed at ground.
Paint can which is placed higher than other can will have more potential energy. Because according to the definition of the potential energy an object placed at some higher place when released to the ground will have greater impact than the one placed at some lower place. Painter can give the other can more potential energy by placing it at some height greater than the other cans.