Answer:
1.7x10^8 Hz
Explanation:
Frequency could be explained as the number of occurrences of a repeating event at a time
Given:
wavelength = 1.8 meters
The frequency f of the waves can be calculated using f = c / λ
Where c (m/s) is the speed of the wave
λ (m) is the wavelength
Speed c= 3*10^8 m/s
Frequency f= 3*10^8 /1.8
Frequency= 1.7x10^8 Hz
Therefore,the frequency of waves from a radar detector is 1.7x10^8 Hz
Answer:
2.29 × 10⁻⁴ moles
Explanation:
Data Given:
Chemical Symbol of Zinc = Zn
Mass of Zinc = 1.5 × 10⁻² g
A.Mass of Zinc = 65.38 g.mol⁻¹
The Atomic Mass of Zinc can be obtained from periodic table. While, the mass is given in statement. Also, it is important to know the symbol because some elements exist in diatomic or polyatomic forms i.e. H₂, N₂, S₈ e.t.c.
Mole is the unit used to calculate the amount of substance. It has following general forms,
Mole = Mass / M.Mass
And,
Mole = # of Particles / 6.022 × 10²³ particles.mol⁻¹
Hence, using first equation,
Moles = 1.5 × 10⁻² g / 65.38 g.mol⁻¹
Moles = 2.29 × 10⁻⁴ moles
I would say c but wait for someone else to comment to be sure!
<span>When you "snip" a branch directly beneath the hypothetical last common ancestral population (internal node), a clade falls off.</span>
Answer:
A small amount of solute dissolved in a larger amount of solvent.
Take this analogy to help you understand, if you were to put a teaspoon of sugar in a liter of water it would dissolve, but if you put a sack of sugar in it it would not dissolve! The solute is what is being dissolved and the solvent is what dissolves the solute, so that eliminates some of the options.