Answer:
Explanation:
Momentum depends on mass and velocity
Second part
Momentum = m * v
If you triple the velocity, you are going to have to triple the momentum
3*momentum = m * 3v
momentum started at 50. If you triple it, you get 3 * 50 = 150 kg m/s
Answer:
The magnitude of the frictional force is
Explanation:
From the question we are told that
The force exerted on the box is
Generally for the box to remain at rest then it means that the frictional force is greater than or equal to the force applied to move it i.e
=>
(a) The equivalent resistance of the circuit is 0.52 ohms.
(b) The total electric current that runs through the circuit is 40.38 A.
(c) The value of the electric current passing through the resistor of 1.0 Ohm is 21 A.
(d) The power dissipated through the 8.0 Ohm resistor is 55.13 W.
<h3>
Equivalent resistance of the circuit</h3>
The equivalent resistance of the circuit is calculated as follows;
1/R = 1/(1 + 1) + 1/(2 + 2 + 2) + 1/(6) + 1/(2) + 1/8 + 1/8 + 1/6 + 1/6
1/R = 1/2 + 1/6 + 1/6 + 1/2 + 1/8 + 1/8 + 1/6 + 1/6
1/R = 1 + 2/3 + 1/4
1/R = 23/12
R = 12/23
R = 0.52 ohms
<h3>Total current through the circuit</h3>
V = IR
I = V/R
I = 21/0.52
I = 40.38 A
<h3>Current through 1 ohm resistor</h3>
V = IR
I = V/R
I = 21/1
I = 21 A
<h3>Power dissipated through 8 ohm resistor</h3>
P = V²/R
P = (21)²/8
P = 55.13 W
Learn more about power dissipated here: brainly.com/question/20642331
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Answer:
<h2>
36cm from the surface</h2>
Explanation:
Equation of refraction of a lens is expression according to the formula given below;
R is the radius of curvature of the convex refracting surface = 12cm
v is the image distance from the refracting surface
u is the object distance from the refracting surface
n₁ and n₂ are the refractive indices of air and the medium respectively
Given parameters
R = 12 cm
u = (since light incident is parallel to the axis)
n₁ = 1
n₂ = 1.5
Required
<em>focus point of the light that is incident and parallel to the central axis (v)</em>
<em />
Substituting this values into the given formula we will have;
Cross multiply
Hence Light incident parallel to the central axis is focused at a point 36cm from the surface