Answer:
58.8Joules
Step-by-step explanation:
The gravitational potential energy = mgh
m is the mass = 2kg
g is the acceleration due to gravity = 9.8 m/s²
h is the height = 3m
Substitute;
GPE = 2 * 9.8 * 3
GPE = 6 * 9.8
GPE = 58.8Joules
Hence the Gravitational Potential Energy of the block is 58.8Joules
If Whitney works 51 hours per week, then that would mean that we’d use the expression 51w because w, representing the weeks, would be multiplied by 51 to find the amount of hours worked in that week. However, since 15 of the hours were spent outside instead of in the office, we’d have to subtract that from the 51w. Therefore, the equation would be:
h= 51w - 15
P/L=4/7 and P=L-12 so
(L-12)/L=4/7 multiply both sides by 7
(7L-84)/L=4 multiply both sides by L
7L-84=4L subtract 4L from both sides
3L-84=0 add 84 to both sides
3L=84 divide both sides by 3
L=28, and since P=L-12
P=16
So they had 28+16 = £44 in total.
Answer:
False
Step-by-step explanation:
If you were to divide a negative number by a negative number, or multiply a negative number by a negative number, you would change the sign to positive as two negatives make a positive.
