Answer:
ω₂ = 1.9025 x 10⁻⁶ rad/s
Explanation:
given,
mass of star = 1.61 x 10³¹ kg
angular velocity = 1.60 x 10⁻⁷ rad/s
diameter suddenly shrinks = 0.29 x present size
r₂ = 0.29 r₁
using conservation of angular momentum
I₁ ω₁ = I₂ ω₂
ω₂ = 1.9025 x 10⁻⁶ rad/s
Answer:
The smallest film thickness is 117 nm.
Explanation:
Light interference on thin films can be constructive or destructive. Constructive interference is dependent on the film thickness and the refractive index of the medium.
For the first interference (surface nearest to viewer), the minimum thickness can be expressed as:
where n is the refractive index of the bubble film.
Therefore,
∴ 
Explanation:
<h3>The beam balance is a device used</h3><h3> for the determination of the mass of </h3><h3>a body under gravitation. It consists </h3><h3>of a beam supported at the centre </h3><h3>by an agate knife edge resting on a</h3><h3> support moving inside a vertical </h3><h3>pillar. The beam carries a light</h3><h3>pointer which moves over a scale.</h3>
Answer:
4.6091 meters
Explanation:
In this problem, to have equilibrium in the seesaw, we need the torque from one child to compensate the torque from the other child.
The torque is calculated by making the product of the mass and the distance to the pivot point.
So, the torque generated by the first child (T1) is equal to:
T1 = m1 * d1 = 39 * 2.6 = 101.4 Nm
To make equilibrium, we need the second child to generate the same torque (T2), so:
T2 = m2 * d2 = 22 * d2 = 101.4
d2 = 101.4 / 22 = 4.6091 m
The second child need to be at 4.6091 meters from the pivot point to be in equilibrium.
