Answer:
5 km North
Explanation:
Displacement refers to the distance covered in a specific direction.
In this case,
Distance covered due north = 8 km
Distance covered due south = 3 km
Therefore;
If we take the distance towards north to be +8 km
The distance towards south to be - 3 km
Then;
Displacement = +8km + (-3km)
= + 5km
= 5 km North
Therefore;
The displacement is 5km towards North.
47 neutrons.
Atomic Number=Number of Proton
Atomic mass=Number of Proton + Number Of Neutron
So, Number of neutron=72-25=47
Answer:
A will float on top of B.
Explanation:
B is more dense. example A is oil and B is water.
Answer:
We can distinguish between ethanol and ethanoic acid by reacting them with a metallic carbonate like Na2CO3 or a bicarbonate like NaHCO3 ....... ethanoic acid reacts to give to give CO2 and no reaction takes place in case of ethanol.
Answer:
19
Explanation:
1240.64/64
This is a simple division that can easily be evaluated using any form of calculator.
Here, the main challenge is in expressing the answer in the proper number of significant figure.
The approach here is to express the answer to the which is least precise. This is usually the number with the lower significant values.
Here, 64 has two significant figures and it is of a lower rank. Our answer should be expressed this way:
= 19.385 = 19