Answer:
A chemical change produces a new substance, while a physical change does not
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:
Data
- Information gathered from observing a plant grow 3 cm over a two week period is called data.
Answer:
8.929kg
Explanation:
The work done to place the box at tree house=350 J.
The distance from ground to tree house =4.0 m and 

Hence the mass of the box is 8.929kg