Matter is made up of molecules and atoms
Answer:
5.42 s
Explanation:
Using the equation of motion,
v = u + at ..................... Equation 1,
Where v = Final velocity, u = initial velocity, a = acceleration, t = time.
Making t the subject of the equation,
t = (v-u)/a ....................... Equation 2
Note: When the the bicycle is brought to a complete stop, the final velocity of the bicycle is 0 m/s and the bicycle is decelerating.
Given: v = 0 m/s, u = 6.5 m/s, a = - 1.2 m/s² ( decelerating).
Substituting into equation 2
t = (0-6.5)/-1.2
t = -6.5/-1.2
t = 5.42 s.
Hence the time take for the cyclist to bring the bicycle to complete stop = 5.42 s
Answer:
110029941 Pa
311388.81857 N
286.48968 N
Explanation:
= Atmospheric pressure = 101325 Pa
= Density of seawater = 1029 kg/m³
h = Depth = 10900 m
g = Acceleration due to gravity = 9.81 m/s²
r = Radius = 3 cm
A = Area = 
Gauge pressure
The gauge pressure is 110029941 Pa
Net pressure at the given depth
Force is given by
The force is 311388.81857 N
Now if P = 1 atm
The force is 286.48968 N
The difference between metal and non-metal in terms of condition is explained below.
Explanation:
- In metals, conduction occurs due to the aggregation of vibrations of molecules and free-electron distribution. While in non-metals, the mechanism for conduction is only atomic or molecular vibrations.
- Apart from free electrons, there are phonons in metals as well as non-metals. Non-metals hold a confined amount of thermal conductivity only due to Phonons and Lattice vibrations.
- Concerning atomic vibration in a solid thing (non-metals mainly), it is easier to know if one receives the fact that atoms are almost floating adjacent to one another depending on the covalent bonds between them.
- When a metal is heated the electrons quickly respond to the heat and transfer it to the nearby atom or solid touching it. As non-metals don't possess free electrons, the heat transfer happens due to phonons (the excited state of the lattice structure vibrating uniformly).
- In metals, this rarely plays a role as the electrons transfer most of the heat efficiently.
