Answer:
cheetah goes 52.2 m in that time.
Explanation:
Given :
Sally travels by car from one city to another. She drives for 30 min at 80 km/hr, 12.0 min at 105 km/hr, and 45 min at 40.0 km/hr.
To Find :
The total distance traveled.
Solution :
Total distance traveled is given as sum :
Distance = sum of product of speed and time
D = (v₁ × t₁) + (v₂ × t₂) + (v₃ × t₃)
Putting all given value in this we get :

Hence, this is the required solution.
Answer:
28.9 seconds
Explanation:
Convert km/hr to m/s.
83.4 km/hr × (1000 m/km) × (1 hr / 3600 s) = 23.2 m/s
16.4 km/hr × (1000 m/km) × (1 hr / 3600 s) = 4.56 m/s
Given:
Δx = 400 m
v₀ = 23.2 m/s
v = 4.56 m/s
Find: t
Δx = ½ (v + v₀) t
400 m = ½ (4.56 m/s + 23.2 m/s) t
t = 28.9 s
I would assume c. Beta particles(electrons)