The blades must be angled to be able to create the lift, and the blades need an engine powerful enough to spin the blades fast enough to create adequite lift. This remindes me of Newton's third law! For every action, there is an oposite reaction
Answer:
option B
Explanation:
given,
toy car is moving in circular track
speed is doubled— a change of a factor of 2
to find change in factor of acceleration
radius doesn't change
centripetal acceleration formula
= 
velocity is change in factor of 2
so acceleration will be change at the factor of
= 
= 2² = 4
so the correct answer is option B
The answer is B I took the test a while back
Answer:
Option D
2 m/s
Explanation:
The speed is given by distance/time
The complete wave has a distance of 8 m (This is the wavelength)
Time taken for complete wave is 4 s
Therefore, velocity= 8 m/ 4 s= 2 m/s
The amplitude is the distance between crest and trough hence 9 m- 6 m= 3 m
Frequency is 1/period and in this case period is 4 s hence frequency= 1/4= 0.25 Hz
Essentially, what we wanted is velocity
Two types of weather are mechanical and chemical
