In (A. Dalton's) atomic model, negative electrons orbit the positively charged nucleus.
Friction always acts opposite to the motion.<em> (B)</em>
Answer:
<h2>6 s</h2>
Explanation:
The time taken by the cyclist can be found by using the formula

v is the velocity
d is the distance
From the question we have

We have the final answer as
<h3>6 s</h3>
Hope this helps you
(amount of heat)Q = ? , (Mass) m= 4 g , ΔT = T f - T i = 180 c° - 20 °c = 160 °c ,
Ce = 0.093 cal/g. °c
Q = m C ΔT
Q = 4 g × 0.093 cal/g.c° × ( 180 °c- 20 °c )
Q= 4×0.093 × 160
Q = 59.52 cal
I hope I helped you^_^