The correct answer is: Option (D) 6 aluminum and 9 oxygen!
Explanation:
Since the one molecule of aluminium and oxygen is Al2O3 (Aluminum oxide). It has 3 oxygen atoms and 2 aluminium atoms. It find the atoms for the 3 molecules, multiply them with 3.
3 * 3 oxygen atoms = 9 oxygen
3 * 2 aluminum atoms = 6 aluminum ( Option D)
Answer:
Since the momentum of the body remains constant ( conserved) the trolley slows down (its velocity reduces) since its mass increases.
Short answer: Can be true but the exceptions below make it false.
There are all kinds of "no"s to this question.
- Friction always goes in the opposite direction to the motion and friction is a force.
- When you are lifting something with a pulley, you provide a force that is opposite the direction of the upward motion of the something.
- If you are pushing down on a teeter totter and you are moving your younger brother upward, your force is in the opposite direction to his motion.
- When you fire a rocket upward on July 1st or July 4th, the rocket moves upward for awhile, but the force of gravity will eventually pull it down. The rocket has an upward force. The force of gravity is downward.
That is false. A GPS cant tell latitude and longitude
The initial horizontal velocity of the rock, in m/s is 21.241 m/s.
<h3>What is projectile?</h3>
When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion.
Time taken by the stone to reach the ground is
t = √2h/g
t = √(2x 86)/9.81
t = 4.19s
The horizontal velocity is
V(x) = Horizontal distance traveled / Time taken t
Put the values, we get
V(x) = 89 m/4.19 s
V(x) = 21.241 m/s
Thus, the horizontal velocity is 21.241 m/s
Learn more about projectile.
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