To determine the net force acting upon an object we need to do the vector addition of the forces acting on it.
In this case we have two forces, one acting to the left and one to the right. We need to establish which of this ways is the positive direction. Let's assume the right direction is the positive direction; for this convention the 20 N forces is positve and the 10 N is positive; then the net force would be:
Since the resulting net force is positive this means, for our convention, that the net force points in the right direction. Therefore, the net force is 10 N to the right.
The correct answer is the Black Market.
The Black Market refers to the informal (and sometimes formal) system of trading of illegal goods by merchants and dealers of products such a weapons, drugs, and good that have been banned by countries. This can also apply to informal marketplaces in countries with sanctions placed upon them get goods that formal treaties are blocking the people from accessing.
Answer:
333.46 J/g
Explanation:
To convert from kiloJoules per mole to kiloJoules per gram, first we convert to Joules per mole:
6.009 kJ/mol * 1000 = 6009 J/mol
1 mole of water contains 18.02 grams of water, hence:
(1 J/mol) / (1 mol) * (1 mol) / (18.02g)
Therefore:
(6009 J/mol) / (1 mol) * (1 mol) / (18.02g)
= 333.46 J/g
Another way of seeing this is, to convert from Joule per mole to Joules per gram, divide by the number of grams in one mole. In the case of water, it's 18.02 grams in one mole.
Answer:
d. 149 ⁰C.
Explanation:
Given;
mass of the block of ice, m = 2 kg
specific heat capacity of the ice, C = 2090 J/(kgK)
initial temperature of the ice, t₁ = -90 ⁰C
heat added to the ice, H = 1,000,000 J
let the final temperature of the ice = t₂
The final temperature of the ice after adding the heat is calculated as follows;
Therefore, the new temperature of the water is 149 ⁰C.
Answer:
a) 256 ft
b) 32 ft/s
c) -32 ft/s
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 32 ft/s²
Maximum height = 256 ft
When s = 240 ft
Speed of the ball at 240 ft is 32 ft/s while going up
Now this will be the velocity of the ball when it reaches 240 ft, which will be considered as the initial velocity
Now, initial velocity will be considered as zero
Speed of the ball at 240 ft is -32 ft/s while going down