Answer:
B ) 1.5 m/s
Explanation:
For the apparent frequency reflected by enemy submarine , the Doppler effect formula is
F = F₀ ( V + v) / (V - v)
F anf F₀ are real and apparent frequency , V and v are velocity of sound and velocity of enemy submarine respectively.
ΔF / F₀ = 
Put ΔF = 200; F₀ = 100000 and V = 1482
200 / 100000 = 
v = 1.5 m s⁻¹ .
Answer:
atm
Explanation:
The pressure at the bottom of any liquid column is equal to product of density of the liquid , gravitational acceleration constant (g) and height of the water column
Thus, 
Substituting the given values, we get -
kg/m3
m/s^2
meters
atm
Answer:
Explanation:
Acceleration = a change in velocity / a change in time
Acceleration = ( final velocity - initial velocity) / a change in time
Acceleration = (6m/s - 35 m/s ) / 5 s
= (-29 m/s) /( 5 s)
= - 5.8 m/s^^2
Remember Significant Figures
- 6 m/s^2
P.S I have no idea why the answers say m/s because acceleration is m/s^2.
:)
Here we have a circular motion. In that type of motion two new forces appear: centrifugal and centripetal. Centrifugal force tries to move object away frome the center of rotation. Centripetal force is the reason why object moves in a circle.
According to Newton's first law, in order for water not to spill out total force acting on water must be equal to zero. Forces acting on the water are gravitational and centrifugal.
![0= F_{g} + F_{c} \\ - [tex]F_{g} = F_{c} \\ m*g= \frac{m* v^{2} }{r} \\ g= \frac{ v^{2} }{r} \\ v^{2} =g*r \\ v= \sqrt{g*r} \\ v= \sqrt{9.81*0.95} \\ v= \sqrt{9.3195} \\ v=3.1 m/s](https://tex.z-dn.net/?f=0%3D%20F_%7Bg%7D%20%2B%20F_%7Bc%7D%20%20%5C%5C%20-%20%5Btex%5DF_%7Bg%7D%20%3D%20F_%7Bc%7D%20%5C%5C%20m%2Ag%3D%20%5Cfrac%7Bm%2A%20v%5E%7B2%7D%20%7D%7Br%7D%20%20%5C%5C%20g%3D%20%5Cfrac%7B%20v%5E%7B2%7D%20%7D%7Br%7D%20%5C%5C%20%20v%5E%7B2%7D%20%3Dg%2Ar%20%5C%5C%20%20v%3D%20%5Csqrt%7Bg%2Ar%7D%20%20%5C%5C%20v%3D%20%5Csqrt%7B9.81%2A0.95%7D%20%20%5C%5C%20v%3D%20%5Csqrt%7B9.3195%7D%20%20%5C%5C%20v%3D3.1%20m%2Fs)
[/tex]
Forces have opposite signs as they act in opposite directions. But their value is the same so we can ignore signs: