Answer:
v = 70 m/s
Explanation:
Range on the cannon ball is given as

here the angle of the projection of the ball is given as 45 degree
now we know that if the velocity of the ball is "v" then its two components will be given as


so here time of flight of the motion is given as


also the range is given as


now plug in all data in this equation


Data:
Vo = 120 ft / s
α = 30°
t = 5 s
x = ?
Formulas:
cos(α) = Vo,x / Vo => Vo,x = Vo * cos(α)
x = Vo,x * t
Calculations:
Vo,x = 120 ft / s * cos(30) = 103.92 ft /s
x = 103.92 ft/s * 5 s = 519.6 ft
Answer: 519.6 ft
Explanation:
C.To measure the length and width of the mineral
Answer:
Honestly for me it's a bit too blurry. Sorry luv.:(
Explanation:
Answer:
Velocity, v = 0.164 m/s
Explanation:
We have,
Frequency of wave, f = 0.04 Hz
Wavelength, 
It is required to find the velocity of a water wave. The speed of any wave is given in terms of wavelength and frequency. Its formula is :

So, the velocity of a water wave is 0.164 m/s.