A 50.0 kg shell is fired from a cannon on Earth's surface to a maximum height of 400 m. What is the

potential energy?

a 196,000

b 170,000 J

C 185,000 J

d 190,000 J

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I also calculated it with 9.8 as the gravity and the answer was 196000 J

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//