Answer:
Hey there!
It does not need a medium to transfer heat.
Let me know if this helps :)
Current= voltage divided by resistance
120/30=4
Answer:
See explanations below
Explanation:
1) KE = 1/2mv²
mass m = 0.142kg
v = 40m/s
KE = 1/2 * 0.142 * 40^2
KE = 1/2 * 0.142 * 1600
KE = 800*0.142
KE = 113.6Joules
2) KE = 1/mv^2
KE = 196
mass m = ?
velocity v = 52m/s
Substitute
196 = 1/2*m*52²
196 = 1352m
m = 196/1352
m = 0.145kg
Hence the mass of the baseball is 0.145kg
3) KE = 1/2mV^2
288 = 1/2 * 4v²
288 = 2v²\
v² = 288/2
v² = 144
v = 12m/s
The velocity of the shotput is 12m/s
The radius of the curve is 81.93 metres. We can work this out by
considering the centripetal force (Fc) = mass x centripetal
acceleration.
Fc = m x u (squared)
R = mu (squared) over Fc = 1600 x (13 squared) over 3300
R = 81.93 metres
I: x = 1/2at²
II: v = at
I+II: x = 1/2a(v²/a²) = 1/2 v²/a
a = 1/2 v²/x
v = 30
x = 49
