Average speed = (total distance) / (total time)
Total distance = 59 km + 74 km = 133 km
Total time = 3 hrs + 5 hrs = 8 hrs
Average speed = (133 km) / (8 hrs) = 16.625 km/hr
Simple answer: they are like large chimneys for the fuel's excess gas.
Answer:
C
Explanation:
Gravity will always be attractive because it pulls things not push. For example gravity pull people to earth, that is why we don't float.
m = mass of pellet = 2.10 x 10⁻² kg
x = compression of spring at the time launch = 9.10 x 10⁻² m
h = height gained by the pellet above the initial position = 6.10 m
k = spring constant
using conservation of energy
spring potential energy = gravitational potential energy of pellet
(0.5) k x² = m g h
inserting the values
(0.5) k (9.10 x 10⁻²)² = (2.10 x 10⁻²) (9.8) (6.10)
k = 303.2 N/m
