Answer:
i just took this test no joke and i got the correct answer which was c
Explanation:
The kinetic energy before equals K after
Answer:
To convert m/sec into km/hr, multiply the number by 18 and then divide it by 5.
Explanation:
please mark as brainliest
Answer: 2.04 s
Explanation:
Let the initial velocity be v, Angle of projectile be
Then the horizontal component = v cos θ = 16 m/s
Vertical component of velocity = v sin θ = 20 m/s
Time taken to reach the highest point is half the time taken for total flight.
Time for total flight,


Thus, the football takes 2.04 s to rise to the highest point of its trajectory.
Answer:
Increasing the tension on a string increases the speed of a wave, which increases the frequency (for a given length). Pressing the finger at different places changes the length of string, which changes the wavelength of standing wave, affecting the frequency.
Explanation: