Answer:
97% will sink below the water
Explanation:
Waters density is 1 g/cm3
If an object's density is greater than 1g/cm3, it will sink. If it's less then it would float. 1-0.97 = 0.03. Only 3% of the ice would show while 97 will be under.
Answer:
Correct answer: W = 2,240 J
Explanation:
Given:
m = 70 kg
V₁ = 6 m/s
V₂ = 10 m/s
W = ?
Work is a measure of change in this case of kinetic energy:
W = ΔE = (m V₂²)/ 2 - (m V₁²)/ 2 = (m / 2) · (V₂² - V₁²)
W = (70 / 2) · (10² - 6²) = 35 · (100 - 36) = 35 · 64 = 2,240 J
W = 2,240 J
God is with you!!!
Answer:
The power consumed by the air filter is 9.936 watts
Explanation:
It is given that, the secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter.
Turn ratio of the transformer, ![\dfrac{N_s}{N_p}=\dfrac{46}{1}](https://tex.z-dn.net/?f=%5Cdfrac%7BN_s%7D%7BN_p%7D%3D%5Cdfrac%7B46%7D%7B1%7D)
Voltage of primary coil, ![V_p=120\ V](https://tex.z-dn.net/?f=V_p%3D120%5C%20V)
Current in the secondary coil, ![I_s=1.8\times 10^{-3}\ A](https://tex.z-dn.net/?f=I_s%3D1.8%5Ctimes%2010%5E%7B-3%7D%5C%20A)
The power consumed by the air filter is :
...........(1)
For a transformer, ![\dfrac{N_s}{N_p}=\dfrac{V_s}{V_p}](https://tex.z-dn.net/?f=%5Cdfrac%7BN_s%7D%7BN_p%7D%3D%5Cdfrac%7BV_s%7D%7BV_p%7D)
So, ![P_s=I_s\times (\dfrac{N_s}{N_p})\times V_p](https://tex.z-dn.net/?f=P_s%3DI_s%5Ctimes%20%28%5Cdfrac%7BN_s%7D%7BN_p%7D%29%5Ctimes%20V_p)
![P_s=1.8\times 10^{-3}\times (\dfrac{46}{1})\times 120](https://tex.z-dn.net/?f=P_s%3D1.8%5Ctimes%2010%5E%7B-3%7D%5Ctimes%20%28%5Cdfrac%7B46%7D%7B1%7D%29%5Ctimes%20120)
![P_s=9.936\ Watts](https://tex.z-dn.net/?f=P_s%3D9.936%5C%20Watts)
So, the power consumed by the air filter is 9.936 watts. Hence, this is the required solution.
Answer:
power is the rate at which energy is transferred or converted
the unit of power is Watts
<h2> F = k×
![\frac{q1q2}{r2}](https://tex.z-dn.net/?f=%5Cfrac%7Bq1q2%7D%7Br2%7D)
</h2>
Explanation:
- The attractive or repulsive forces which act between any two charged species is an electric force.
- The electric force depends on the distance between the charged species and the amount of charge which can be calculated by the formula given as follows
F = k×![\frac{q1q2}{r2}](https://tex.z-dn.net/?f=%5Cfrac%7Bq1q2%7D%7Br2%7D)
where, K is coulombs constant, which is equal to - 9 x10^9 ![Nm^2/C^2.](https://tex.z-dn.net/?f=Nm%5E2%2FC%5E2.)
- The unit for K is newtons square meters per square coulombs.
- This is known as Coulomb's Law.