Answer:
Explanation:
Given
First you travel 4 mi North
position vector for this displacement is given by
Now you travel 5.31 mi w.r.t is given by
Now you travel 1.1 mi in a direction North of east; Position vector w.r.t is given by
Thus Position Vector of w.r.t starting Point
For angle
Answer: initially the packet was ascending up with the balloon.
Taking upward as positive direction;
initial velocity, u = 4.9 m/s
final velocity = v m/s
initial height, h₁ = 245 m
final height, h₂ = 0
a = -9.8 m/s²
time taken = t seconds
s = ut + 0.5at²
⇒ (h₂-h₁) = ut + 0.5at²
⇒ 0-245 = 4.9t + 0.5×(-9.8)×t²
⇒ -245 = 4.9t - 4.9t²
⇒ 4.9t² -4.9t -245 =0
Solving it, we get t = 7.59s
v = u + at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/s
So velocity is 69.48 m/s downward
Explanation:
Answer:
B) convection
Explanation:
Heat convection is the result of heat conducting between fluid or gas and solid, and is closely related to the flow of the fluid and condition of the interface.