The triangle stands for change. X means the distance spring stretched or compressed. so together, it's the change in the distance of the spring stretched or compressed.
Answer:
Na⁺
Explanation:
In the given atom:
Number of protons = 11
Number of neutrons = 12
So, the number of electrons = 10
The number of protons within an atom is used to determine the kind of atom we have been given.
Since the number of protons is the same as the atomic number, here the atomic number is 11 and this is Sodium .
In this sodium atom, the number of protons is more than the number of electrons;
Charge = number of protons - number of electrons = 11 - 10 = +1
So, we have a Na⁺
The answer would be: c. High levels of dissolved oxygen
Oxygen is vital for most (aerobic) organism. Fish using oxygen that dissolved in the water so high level of dissolved oxygen will make the fish grow easier. Water with pH of 5 would be an acid water. Acid is corrosive and it can kill some organism that sensitive. High levels of fecal coliform mean the water contaminated with fecal material and must have a high level of bacteria.
Answer:
441.45N
Explanation:
Weight = mass(kg) x acceleration (m/s^2)
Weight = 45kg x 9.81m/s^2=441.45N
Recall that weight =mass of the rock x gravitational force acting on the rock
Therefore, the rock will weigh = 441.45N
Answer:
D) not enough information to decide
Explanation:
Data provided in the question
The True weight of book stacks = 165 N
Reading of the scale = 165 N
Constant velocity = 2 m/s upward or downward
Based on the above information
If you moved at a constant velocity the scale interprets the same because of the momentum you've got. The scale will change the number only when acceleration is present.
Therefore in the given situation, the option D is correct as it not have enough information for deciding it
