Vince is baking a cake. He pours flour and sugar into an empty bowl. The substance in the bowl is a(n) __________.
2 answers:
Answer: c) mixture.
Explanation:
An atom is the smallest entity of any substance which consists of subatomic particles called as neutrons, protons and electrons.
An element is a pure substance which is composed of atoms of similar elements. Example:
Mixture is formed when atoms of similar or different elements are mixed in no fixed ratio without any chemical combination.
A compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. Example:
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Answer:
1.6 kg
Step-by-step Solution:
Since Force = mass × acceleration we have:
F = 8N
a= 5 m/s^2
m = ?
By plugging the values above into F=ma we obtain:
Therefore, the Chromebook has a mass of 1.6 kilograms.
Answer:
Given:
Thermal Kinetic Energy of an electron,
= Boltzmann's constant
Temperature, T = 1800 K
Solution:
Now, to calculate the de-Broglie wavelength of the electron, :
(1)
where
h = Planck's constant =
= momentum of an electron
= velocity of an electron
= mass of electon
Now,
Kinetic energy of an electron = thermal kinetic energy
(2)
Using eqn (2) in (1):
Now, to calculate the de-Broglie wavelength of proton, :
(3)
where
= mass of proton
= velocity of an proton
Now,
Kinetic energy of a proton = thermal kinetic energy
(4)
Using eqn (4) in (3):
Answer:
Explanation:
a = 4ms⁻², Vf = 180 m/s & Vi = 140m/s
a =
4 =
t = 40/4
t = 10sec
To Measure Distance Use third Equation of Motion:
2aS = Vf²-Vi²
S =
S = 12800/8 = 1600m