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.
- The two types of grip in table tennis are <u>penhold grip</u> and <u>shakehand grip</u>.
- A <u>serve</u> is a stroke that starts a rally.
- A <u>receive</u> is a stroke to reply to a <u>serve</u>.
- A let is a <u>rally</u> of which the result is <u>not scored</u>.
- A point is a rally of which the result is scored.
<h3>What is table tennis?</h3>
Table tennis can be defined as an indoor sport and recreational activity in which two (2) or four (4) players hit a ping-pong ball back and forth on a table that is divided into halves by a low net, especially through the use of a small-solid bat (racket).
<h3>Types of grip in
table tennis.</h3>
Generally, there are two (2) main types of grip in table tennis and these include:
<h3>The
fundamental skills of table tennis.</h3>
Basically, there are four (4) fundamental skills used in table tennis and these are:
- Forehand drive
- Backhand drive
- Backhand push
- Forehand push.
Read more on table tennis here: brainly.com/question/17358010
It's lead. That's why the "apron" is so heavy.
Wind is usually caused by a difference in pressure that causes wind to be "Pushed" on the surface of earth. Air usually moves from high to low pressure and that is what we call wind. Please hit the thanks button if this helped :)
Answer:
Explanation:
a) Force of friction = μ R where μ is coefficient of kinetic friction and R is reaction force
R = mg where m is mass of the block
Force of friction F = μ x mg
= .173 x 12.2 x 9.8
= 20.68 N
b ) Only force of friction is acting on the body so
deceleration = force / mass = 20.68 / 12.2 = 1.7 m /s²
acceleration = - 1.7 m /s²
c )
v² = u² - 2 a s
v = 0 , u = 3.9 m /s
a = 1.7 m /s
0 = 3.9² - 2 x 1.7 x s
s = 4.47 m
