Answer:
Part a)
a = -9.81 m/s/s
Part b)
v = 0
Part c)
v = 9.81 m/s
Part d)
Explanation:
Part a)
During the motion of ball it will have only gravitational force on the ball
so here the acceleration of the ball is only due to gravity
so it is given as
Part b)
As we know that ball is moving against the gravity
so here the velocity of ball will keep on decreasing as the ball moves upwards
so at the highest point of the motion of the ball the speed of ball reduce to zero
Part c)
We know that the total time taken by the ball to come back to the initial position is T = 2 s
so in this time displacement of the ball will be zero
Part d)
at the maximum height position we know that the final speed will be zero
so we will have
here we have
Property of all ionic compounds make them electrolytes;
An electrolyte is a compound that conducts an electric current it is also in the form of aqueous solution or in the molten state, the ionic compounds are electrolytes because they dissociate into ions.
Explanation:
- Property of all ionic compounds make them electrolytes;
- An electrolyte is a compound that conducts an electric current it is also in the form of aqueous solution or in the molten state, the ionic compounds are electrolytes because they dissociate into ions.
- Most of the unique properties come from the hydrogen bonds which holds the water together.
- when a solutes break away from the crystal, the negatively and positively charged ions become surrounded by solvent molecules and it dissolves the ionic crystal.
1). <u>Power = (voltage)² / (Resistance)</u>
4,500 = (220)² / Resistance
Multiply each side by (resistance) : 4,500 x resistance = (220)²
Divide each side by 4,500 : Resistance = (220)² / 4,500 = <em>10.76 ohms</em>
2). <u>Power = (voltage) x (Current)</u>
Divide each side by (voltage): Power / voltage = Current
4,500 / 220 = <em>20.45 Amperes</em>
3). 4,500 watts = 4.5 kilowatts
(4.5 kilowatts) x (4 hours) = <em>18 kilowatt-hours</em>
