Answer:1384 Hz
Explanation:
Given
wavelength
=0.25 m
Temperature T
at 
velocity of sound is 346 m/s
and we know
f=1384 Hz
W = mg
Weight on Earth = 50 x 9.8
= 490 N
Weight on Mars = 50 x 3.7
= 185 N
Answer:
To decide where the balls land, we need to determine how long the balls are in the air. Both balls will take 2 seconds to hit the ground.
Explanation:
1) Time played forward : gravity & drag forces are in opposite directions so it takes a longer time to reach the ground. 2) Time played backward : gravity & drag forces are in the same direction so it takes a shorter time to reach the ground.
Three things that effect a life system would be
- sunlight
-water
-energy/food
Hope this helps
