Question

I.the heater has power output of 3kw

What does the 'k' stand for in 'kW'?
How much energy (in joules) does the heater deliver in one second?
ii.
How much energy (in joules) does the heater deliver in 7 minutes?​

Answer 1

2

cos

(

x

)

−

√

3

=

0

2

cos

(

x

)

-

3

=

0

5

3

y

+

5

2

=

5

5

3

y

+

5

2

=

5

x

−

4

≥

0

Explanation:hopefully this helps you