The force of gravity produces acceleration in all freely falling objects and this is known as acceleration due to gravity.
Option C
<u>Explanation</u>:
When the falling of any object is due to action of gravity then it is called freefalling object which is explained in newton's second law of motion. The "acceleration due to gravity" of "free falling object" is constant and is given by 9.8m/s and is denoted as "g". The free fall of object does not consider "weight, size and shape" as factors.
Answer: Hello your question is incomplete, I was able to find the question online but I am unable to attach it due to plagiarism rules
answer : Lithium and Potassium
Explanation:
The elements that are in the unknown sample are : Lithium and Potassium
An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table
Answer:
1. 10 ft/s² straight up
2. 4 Km north-west
3. 20 m/s South
Explanation:
To successfully categorize the quantities given above as vectors, we must understand what vector quantity is.
A vector quantity is a quantity that has both magnitude and direction.
Considering the question given above, the vector quantities are:
1. 10 ft/s² straight up
2. 4 Km north-west
3. 20 m/s South
The remaining quantities in the question are not considered as vectors because they only have magnitude but no direction. They are therefore referred to as scalar quantities.
Explanation:
(a) First, we will calculate the number of moles as follows.
No. of moles =
Molar mass of helium is 4 g/mol and mass is given as 0.1 kg or 100 g (as 1 kg = 1000 g).
Putting the given values into the above formula as follows.
No. of moles =
=
= 25 mol
According to the ideal gas equation,
PV = nRT
or,
= 336.17 K
Hence, temperature change will be 336.17 K.
(b) The total amount of heat required for this process will be calculated as follows.
q =
=
= 174573.081 J/K
or, = 174.57 kJ/K (as 1 kJ = 1000 J)
Therefore, the amount of total heat required is 174.57 kJ/K.