Answer:
Angular momentum is conserved if there are no external forces
P1 = P2
I1 ω1 = I2 ω2
ω2 / ω1 = I1 / I2
If the skater pulls their arms in (I2 < I1) then the angular speed must increase for angular momentum to be conserved.
Answer:
10
Explanation:
can you help me Complete the following sentence: After we explained why we needed her in the play, she and joined our rehearsal A quaffed B. acquiesced C vengeance D. wreaked
Answer:
(a) Electrostatic force F=4.51×10⁻¹⁷N
(b) Number of electron n=4425 electrons
Explanation:
Given data
Charges q₁=q₂= -7.08×10⁻¹⁶C
Distance r=1.00cm =0.01 m
To find
(a) Electrostatic force F
(b) Number of electron n
Solution
For (a) Electrostatic force
From Coulombs law we know that
For (b) number of electron n
The number of electron on the drop that giving it its imbalance is the total charge divided by charge of electron
As we now that charge of electron e= -1.6×10⁻¹⁹C
Answer:
The density of the other liquid = 700 kg/m³
Explanation:
Given that
balance in the air = 29 N
Lets take the mass of the object = m
Volume of the object = V
m g = 29 N -----------1 ( assuming that bouncy force due to air is zero)
Spring balance in the water :
Bouncy force due to water = ρ V g
Density of water = 1000 kg/m³
Spring balance = 19 N
19 + ρ V g = m g
19 + ρ V g = 29
ρ V g =10 ----------2
Spring balance in the another liquid :
Bouncy force due to water = d V g
d=Density of the other liquid
Spring balance = 22 N
22 + d V g = m g
22 + d V g = 29
d V g =7 ----------3
Form equation 2 and 3
d= 700 kg/m³
Therefore the density of the other liquid = 700 kg/m³