Chemistry
The chemical symbol for Sodium?
Na
What is the 1st law of motion?
Law of inertia
hottest stars are...
Blue
The top of a Wave is the...
Crest
What is the chemical compound For Sucrose?
A. CH3COOH
B. C12H5O11
C. SiO2
D.N2O
Answer: B
Is the following true?
2H2O--> H2+O2
It is false
explain the 3rd law of motion
For every action there's a equal and opposite reaction
What type of galaxy?
no definite shape
full of stars
can form when galaxies collide
irregular galaxy
The rate of how many waves pass in a minute.
Frequency
What is the largest known black hole?
A. IC 1101
B. Phoenix A
C. Ton 618
C. Ton 618
How to determine the number of neutrons?
1.look for atomic mass 2. round atomic mass to the nearest one 3. subtract number of protons from atomic mass 4. have answer
Moving 2m/s^2 west is an example of what?
Velocity
Black holes were once a...
a Supergiant star
What wave type is used to see your bones?
X-ray waves
When did Isaac Newton publish his laws of motion
A. 1687
B. 1678
C. 1681
D.1689
A. 1687
Most outer electron(s)?
Valence electrons
is a ball weighing 4kgs is rolling at 6m/s^2. what is the force of the ball if the friction of the ground is slowing it down by 1/3 of its original force
16N
What kind of star is Pollux?
Red giant
Height of a wave is...
Amplitude
Which is the most radioactive element?
A. Radium
B. Lanthanum
C. Oganesson
D. Uranium
C. Oganesson
Xe is the chemical symbol for what element
Xenon
A Book sitting on a desk is a example of what law of motion?
1st law
True or False: supernovas turn into white dwarfs.
False
Which color has the highest frequency
Violet
What's the wavelength of infrared Waves
A. 10-8
B. 105
C 10-5
D. 10-3
C. 10-5