The answer is b because the wind exerts a force on the kite
Answer:
196J, but C. at 200 J comes close.
Explanation:
Potential energy due to gravity is given by:
PEgrav = mass • g • height
where g is the acceleration due to gravity. We'll use 9.8 N/kg (on Earth).
PEgrav = mass • g • height
PEgrav = (2 kg) • (9.8 N/kg) • (10 m)
PEgrav = 196 N*m
1 N*m = 1 Joule
PEgrav = 196 J
C. at 200 J comes close. The solution probably used a value of g equal to 10 N/kg)
Answer:
I believe the answer is electrons.
Explanation:
Protons can't move and neurons don't have a charge so it would be electrons.
Answer:
Changing the surface area from minimum to maximum increases the number of reactants in a chemical reaction.
An increase in surface area of a solid reactant means more of its particles are exposed to attack by the other Particle. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.
Answer: The formula for this hydrate is 
Explanation:
Decomposition of hydrated copper sulphate is given by:
Molar mass of 
= 160 g/mol
According to stoichiometry:
(160+18x) g of 
decomposes to give 160 g of anhydrous
Thus 42.75 g of decomposes to give=
g of anhydrous
Thus the formula for this hydrate is
