The area of the base is
Ab = 2.1 cm x 5.6 cm
The least number of significant figures is 2, so the number of significant figures of the product must also be 2.
Ab = 11.76 cm² which must be rounded-off to 12 cm²<span />
Answer:
A 03
Explanation:
jammer as verkeerd
Ek is nog steeds 'n beginner
Answer:
Newton's second law
Explanation:
The rate of change of momentum of an object is equal to the net force acting on it. When bumper cars collide they push on each other. These pushes cause the momentum of each car to change.
Option b I think :) hope this helped!
Answer:
C) 0, +5
Explanation:
P + H2O + HNO3 -> H3PO4 + NO
We consider all compounds that contain phosphorus in the equation
A substance that has no charge has a zero oxidation state
Hence at the reactant, phosphorus has an oxidation state of 0
Let us consider H3PO4 at the product side
Oxidation state of
H =+1×3=+3
O=-2×4=-8
P = ?
H3PO4 is a neutral compound and has 0 oxidation state
The sum of the individual oxidation states of each atoms in H3PO4 is equal to 0
Hence,
+3 + P + (-8) = 0
3+P-8=0
P=-3+8=+5
Hence the oxidation state of phosphorus in H3PO4 is +5
Therefore, the oxidation state of P in the reaction changed from
0 to +5
Phosphorus is said to have undergone oxidation