Answer:
true
Explanation:
abiotic means nonliving and biotic means living
The answer is 300
3 * 100
3 * 10 * 10
30 * 10
300
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Answer:
d. add another d-cell to the circuit
Explanation:
To make the electromagnet pick something, the student should add another d-cell to the circuit.
Simply, the electromagnet set up is generating very weak magnetic fields.
- To produce an electromagnet, there must be an interaction between electric fields an conductor.
- As the wire turns around in the vicinity of the electric field, it induces magnetism.
- The number of turns of wire here is pretty considerable.
- But the electric field is very weak.
- Additional d-cell in the circuit will circumvent this problem
Mass of Oxygen : 8 g
<h3>Further explanation</h3>
Given
48g of Magnesium
32g of Oxygen
Required
Mass of Oxygen
Solution
The ratio of Mg and O in MgO :
48 g : 32 g = 3 : 2
Total ratio = 3+2 = 5
So for 20 g MgO, mass of Oxygen :
=2/5 x 20 g
=8 g
Or
%mass O = 32/80 x 100%=40%
mass O in 20 g MgO =
40% x 20 g =8 g
