Answer:
The right option is C. i.e L
Explanation:
Dimension of a quantity is the collection of the indexes of each of the fundamental quantities contained in it.
Therefore, to get the dimension of A in the equation
X=Asin(2(pi)ft)
Making A the subject of the formula
A = X / (sin(2(pi)ft)
Since sin(2(pi)ft which is a trigonometric function does not have a dimension
A = L
The dimension of A is L
Answer:
48 meters north
Explanation:
If you measure the distance between the point Marus started and the point where they stopped after traveling 1,250 meters back south, you get 48 meters. To make this a displacement quantity, you add 'north' to the end and get 48 meters north, considering this was the initial direction of the motorcycle.
You have not provided choices, therefore, I can not provide an exact choice.
However, I will tell you the components of the given circuit and you can choose the one found in the choices you have.
The given circuit is composed of:
1- A battery:
It has the symbol of the long line and short line next to each other. The long line represents the positive pole while the short line represents the negative one. Battery is used to supply power to the circuit
2- An ammeter:
If has the symbol of an "A" in a circle. This device is used to measure the current flowing in the circuit
3- A resistance:
It has the symbol of the zigzag line. Resistance could be any device that consumes the power in the circuit.
4- A switch:
This has the symbol of the line at the bottom of the circuit. In its current status, the switch is off which means that no current is flowing in the circuit. If we connect the open terminal of the switch with the circuit, the switch is said to be on and current would flow in the circuit.
Hope this helps :)
Answer:
Option (b) is correct.
Explanation:
The amount of heat required to raise the temperature of substance of mass 1 kg by 1 degree C, is called specific heat of the substance.
The formula of the specific heat is
H = m c (T' - T)
where, m is the mass, c is the specific heat and T' - T is the change in temperature.
So, to know the rise in temperature, by adding the known amount of heat, the specific heat is required.
So, option (b) is correct.
Solution.
Initial angular velocity ωi = 0.330 × 2π rad/sec
= 2.0737 rad/sec
The initial moment of inertia li = 0.5×M×r²
= 0.5 × 120 × 1.8²
= 194.4 kgm²
But the angular momentum is given by the product of moment of inertia and the angular velocity.
= li × ωi
= 2.0737 × 194.4
= 403.13 kg.m²/s which is constant
Child moment of inertia (point mass) = m × r²
= 27.5 × 1.8²
= 27.5 × 3.24
= 89.1 kgm²
Thus, the final moment of inertia if = 194.4 + 89.1 = 283.5 kgm²
Therefore; the final speed: =403.13/ 283.5
= 1.422 rad/sec
This is equivalent to;
1.422/2π = 0.2263 rev/s
