Answer:
The ratio of lengths of the two mathematical pendulums is 9:4.
Explanation:
It is given that,
The ratio of periods of two pendulums is 1.5
Let the lengths be L₁ and L₂.
The time period of a simple pendulum is given by :
or
Where
l is length of the pendulum
or
....(1)
ATQ,
Put in equation (1)
So, the ratio of lengths of the two mathematical pendulums is 9:4.
Answer:
Diffraction and Interference of light support the wave theory of light.
Explanation:
Complete Question
Which phenomena support only the wave theory of light? Check all that apply.
1.reflection
2.refraction
3.diffraction
4.interference
5.photoelectric effect
Solution
There are two theories/schools of thoughts that light possesses wave and particle properties.
The wave properties of light explain that light is made as a result of interactions of electric and magnetic fields, hence, light is regarded as an electromagnetic wave that propagates without the need for a material medium and moves in a direction perpendicular to the direction of the oscillations or direction of the cause/source of the light waves.
Properties that support the wave properties of light are diffraction (ability to navigate or bend around obstacles) and Interference (two light waves can combine or superimpose to form a single resultant light wave with amplitude greater, lower or equal to the amplitudes of the two constituting light waves).
Hope this Helps!!!
Formula
F = k*x
Givens
F = 21 N
x = 13
K = ?
Solution
21 = 13 k
21/13 = k
k = 1.615 N / cm
The units are not quiet the ones you should be using. Newtons are found in the mks system.
13 cm [1 m / 100 cm ] = 0.13 m
So an alternate solution is
21 N = k * 0.13 m
k = 21 N / 0.13 m
k = 161.5 Newtons / meter. Answer
Answer:
The spring stretched by x = 13.7 cm
Explanation:
Given data
Mass = 3 kg
k = 120 
Angle 
= 34°
From the free body diagram
Force acting on the box = mg sin
⇒ F = 3 × 9.81 × 
⇒ F = 16.45 N ------- (1)
Since box is attached with the spring so a spring force also acts on the box.
= k x
= 120 
-------- (2)
The net force acting on the body is given by
Since acceleration of the box is zero so
Put the values from equation (1) & (2) we get
16.45 = 120
x = 0.137 m
x = 13.7 cm
Therefore the spring stretched by x = 13.7 cm
Answer:
Monitoring reader comments and engagements, mini research about the demographics of previous edition, an online survey
Explanation:
The more she understands the background and need of her audience, the better her speech and coherence will be .
Some ways to discover her audience are:
1. Ask the organizers or do a mini research about the demographics of the audiences that are at the previous edition of the annual fund-raiser. Knowing the demographics such as gender, age group, level of education, language,culture etc. will allow her to Know about the audience's interest ad common grounds.
2. Monitoring of comments and engagements about the program can give her incite about the audience
3. A survey can be carried out if the audience are accessible.
