Answer:
There are 4 hydrogen atoms and 2 oxygen atoms in two molecules of water.
Explanation:
There are 2 hydrogen atoms and 1 oxygen atom in ONE molecule of water: H20
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Answer:
Frequency is 3HZ.
Explanation:15/5 =3
Violet has more frequency
Wavelength is 340000m.
Answer:
The speed of the boat-A is 47.84 knots.
Explanation:
Mass of boat-A = m
Mass of boat-B = m
Kinetic energy if the boat-A = E
Kinetic energy if the boat-B = E'
Velocity of boat-A = v = ?
Velocity of boat-B = v'= 34 knots = 34 nautical miles /hour
1 knot = 1 nautical mile per hour
1 nautical mile = 6,076 feet
34 nautical miles /hour = 34 nautical miles /hour × 6,076 ft/miles = 205,564 ft/hour
Kinetic energy of boat-A is given by :
Kinetic energy of boat-A is given by :
..[1]
Kinetic energy of boat-B is given by :
..[2]
E= 2E' (given)
[1] ÷ [2]
v' = 47.84 knots
The speed of the boat-A is 47.84 knots.
Cesium is the biggest, atom wise.It has 55 protons.