Physical changes: melting, evaporating, and condensation. This is a physical change.
Answer:
2,500m/h
Explanation:
Average speed is calculated as total speed traveled divide by total time taken:
Given total distance as 7250m and total time as , speed is calculated as :
Hence, Joshua's speed is 2,500m/h
At 1 because the cart is still at the top
Answer:
Mechanical, chemical and heat ?
To me the basic difference is their frequency and wavelength.
For frequency :
Infrared < visible light < ultraviolet
For wavelength :
Infrared > visible light > ultraviolet