I can confirm, your answer is 800J (Or 800 Joules)!
I just took the test and this was the correct answer :)
Answer: 5.71kg and 10.33N
Explanation:
Recall,
Weight =mass × g
Where w = 56.0 N , g = 9.8 m/s2
56= m × 9.8
M = 56/9.8
M = 5.71 kg
At the surface of the moon, the mass still remains 5.71kg because it is a fundamental quantity it does not change irrespective of position.
Weight at the moon surface will change as a result of change in gravity. Hence, weight = mg
Where g=1.81m/s2, m= 5.71
W = 5.71×1.81
W = 10.33N
Answer:
The kinetic energy of the arrow after release is 89.056 J.
Explanation:
Given that,
Mass of arrow, m = 23 g = 0.023 kg
Velocity of the arrow, v = 88 m/s
The power stroke of the bow is 57 cm. The peak draw weight of the bow is 312 N. We need to find the kinetic energy does the arrow have after release. So, it is given by :
So, the kinetic energy of the arrow after release is 89.056 J. Hence, this is the required solution.
Answer:
A stream erodes the outsiders of meanders and deposits sand and gravel on the inside bends to from point bars. Both the velocity and channel depths are greatest near the outside bend and stream erode at outsides banks. In the same time sediment erodes is deposited in the slower water on the inside of the meander forming a point bar. Because the outside bank of a meander is eroded and sediment is deposited on the insde of the bend towards its outside bank. Hence in this meandering streams form an alternating series of cut banks and point bars along there course.