Answer:
Explanation:
Given that,
Basketball has a mass of 0.1kg
m = 0.1 kg
The basket ball is moving at constant speed, this shows that it is not accelerating. So, acceleration is zero
a = 0m/s²
The constant speed is 6m/s
v = 6m/s
So, force to keep it moving with this constant speed can be calculated using Newton second law of motion
F = ma
F = m × 0
F = 0N
So, since the basket ball is moving at constant speed, then, the force need to keep the ball moving is 0N.
Gravity
The moon doesn't smash into the earth because the gravity from the earth keeps the moon in orbit around it.
Answer:
True
Explanation:
As frequency increases, the length of the wave (period) decreases.
As frequency decresaes, the length of the wave (period) increases.
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Answer:
Delta pressure = 45938[Pa]
Explanation:
This is a classic bernoulli equation problem, but first we must find the velocity at both ends of the pipe, knowing the diameters of each end.
![Q=V*\frac{\pi*d^{2} }{4} \\where:\\V = velocity[m/s]\\d = diameter [m]\\Q = volumetric flow[m^{3}/s]](https://tex.z-dn.net/?f=Q%3DV%2A%5Cfrac%7B%5Cpi%2Ad%5E%7B2%7D%20%7D%7B4%7D%20%5C%5Cwhere%3A%5C%5CV%20%3D%20velocity%5Bm%2Fs%5D%5C%5Cd%20%3D%20diameter%20%5Bm%5D%5C%5CQ%20%3D%20volumetric%20flow%5Bm%5E%7B3%7D%2Fs%5D)
![Q=55[\frac{Lt}{s}] * \frac{1m^3}{1000Lt}\\Q=0.055[\frac{m^3}{s}]](https://tex.z-dn.net/?f=Q%3D55%5B%5Cfrac%7BLt%7D%7Bs%7D%5D%20%2A%20%5Cfrac%7B1m%5E3%7D%7B1000Lt%7D%5C%5CQ%3D0.055%5B%5Cfrac%7Bm%5E3%7D%7Bs%7D%5D)
Now we can calculate the two velocites VA and VB
Using the bernoulli equation we have:
![P_{A}+ro*V_{A}^{2} +h_{A}*g*ro = P_{B}+ro*V_{B}^{2} +h_{B}*g*ro \\as we have the same elevation\\h_{A}*g*ro = h_{B}*g*ro\\Therefore\\P_{A}+ro*V_{A}^{2} = P_{B}+ro*V_{B}^{2}\\P_{B}- P_{A}= ro*V_{A}^{2} - ro*V_{B}^{2}\\\\P_{B}- P_{A}=ro*(V_{A}^{2} - V_{B}^{2})](https://tex.z-dn.net/?f=P_%7BA%7D%2Bro%2AV_%7BA%7D%5E%7B2%7D%20%2Bh_%7BA%7D%2Ag%2Aro%20%3D%20P_%7BB%7D%2Bro%2AV_%7BB%7D%5E%7B2%7D%20%2Bh_%7BB%7D%2Ag%2Aro%20%5C%5Cas%20we%20have%20the%20same%20elevation%5C%5Ch_%7BA%7D%2Ag%2Aro%20%3D%20h_%7BB%7D%2Ag%2Aro%5C%5CTherefore%5C%5CP_%7BA%7D%2Bro%2AV_%7BA%7D%5E%7B2%7D%20%3D%20P_%7BB%7D%2Bro%2AV_%7BB%7D%5E%7B2%7D%5C%5CP_%7BB%7D-%20P_%7BA%7D%3D%20ro%2AV_%7BA%7D%5E%7B2%7D%20-%20ro%2AV_%7BB%7D%5E%7B2%7D%5C%5C%5C%5CP_%7BB%7D-%20P_%7BA%7D%3Dro%2A%28V_%7BA%7D%5E%7B2%7D%20-%20V_%7BB%7D%5E%7B2%7D%29)
Where ro = density of water = 1000[kg/m^3]
![P_{B}-P_{A}= 1000*(7^2-1.75^2)\\P_{B}-P_{A}= 45937.5[Pa]](https://tex.z-dn.net/?f=P_%7BB%7D-P_%7BA%7D%3D%201000%2A%287%5E2-1.75%5E2%29%5C%5CP_%7BB%7D-P_%7BA%7D%3D%2045937.5%5BPa%5D)
Current is a measure of an Electric current. It’s more then likely C. Hope this helps Good luck !!