The cost of boiling 500cm3 of water using the 3kW kettle is 1.35 P.
<h3>
Cost of electricity for 3 kW kettle</h3>
The cost is calculated as follows;
1 unit = 9p /kWh
Total energy consumed by 3 kW kettle, E = P x t
where;
- P is power (kW)
- t is time in (hr)
E = 3 kW x (3 mins/60 mins/hr)
E = 0.15 kWh
Energy cost = 9 p/kWh x 0.15 kWh = 1.35 P
Thus, the cost of boiling 500cm3 of water using the 3kW kettle is 1.35 P.
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Answer:Magnetic fields are invisible, at least usually. But scientists from NASA's Space Sciences Laboratory have made them visible as "animated photographs," using sound-controlled CGI and 3D compositing.
Explanation:
The conclusion is; Cathy's dad has gone fishing.
<h3>What are conclusions in conditional statements?</h3>
A conditional statement is a statement with a hypothesis which is then followed by a conclusion.
A conditional statement has two parts; "if" and "then"
The hypothesis is “if,” part of a conditional statement.
The conclusion is the “then,” part of a conditional statement.
Considering the given conditional statements:
1. If it's Saturday, then Cathy's dad goes fishing.
2. If it's Saturday, then Cathy's dad goes fishing.
Since the if part is true, the conclusion will be, Cathy's dad has gone fishing.
In conclusion, a conditional statement consists of a hypothesis and a conclusion.
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Answer:
24kgm/s
Explanation:
Given parameters:
Force = 80N
Mass of object = 6kg
Initial velocity = 4m/s
Final velocity = 8m/s
Solution:
Impulse = ?
Solution:
The impulse on a body is its change in momentum.
Impulse = m (v - u )
m is the mass
v is the final velocity
u is the initial velocity
Now insert the parameters and solve;
Impulse = 6 (8 - 4) = 24kgm/s