and you can simply solve that for "x"
Answer:
2290 steel balls weigh 3,180 grams so each ball weighs 1.3886462882
grams. If you had a 8.87 kilograms of those balls they would number
8,870 grams / 1.3886462882 = 6,388 steel balls
Step-by-step explanation:
Answer:
you need to show or tell us the problem for us to be able to help you
Step-by-step explanation:
:/
Y = 1/2x + 2....the slope here is 1/2. A parallel line will have the same slope.
y = mx + b
slope(m) = 1/2
(-2,4)....x = -2 and y = 4
now we sub and find b, the y int
4 = 1/2(-2) + b
4 = -1 + b
4 + 1 = b
5 = b
so ur parallel line is : y = 1/2x + 5
Answer: Heat rejected=150000MW
Heat rate= 2.5
Step-by-step explanation:
Thermal efficiency is defined as work out divided by heat in.
Therefore
thermal efficiency = 40/100= 100000 MW/Heat in
Heat in = 250000MW
For a closed system undergoing a cycle the change in internal energy is zero. Therefore the work out of the system is equal to the net heat transfer of the system. Therefore
Work out= heat in - heat out
Therefore heat out = heat in - work out
Heat out = 250000 MW - 100000MW = 150000 MW which is the amount of heat rejected
The heat rate is defined as the inverse of the thermal efficiency expressed in kJ/kWh.Therefore
Heat rate = 1/thermal efficiency
Heat rate = 1/0.4 = 2.5 kJ/kWh