Answer:
Frequency change by a factor of 2.
(b) is correct option.
Explanation:
Given that,
Mass = 16 kg
Replaced mass = 4 kg
We need to calculate the frequency
Using formula of frequency
Put the value into the formula
....(I)
...(II)
Hence, Frequency change by a factor of 2.
Answer:
The idex of refraction of the medium is 1.31.
Explanation:
the relationship between the index of refraction of a medium and the speed at which light travels is given by:
n = c/v
where n is the index of refraction, c is the speed of light and v is the speed of light in the medium.
n = c/v
= (3×10^8)/(2.290×10^8)
= 1.31
Therefore, the idex of refraction of the medium is 1.31.
Answer:
Its 13n
Explanation:
for 1n its 0.2 times that by 13 and you get 2.6
Answer:
t = 6 [s]
Explanation:
In order to solve this problem we must first use this equation of kinematics.
where:
Vf = final velocity = 0 (the car comes to rest)
Vo = initial velocity = 72 [km/h]
a = acceleration [m/s²]
x = distance = 60 [m]
First we must convert the velocity from kilometers per hour to meters per second.
Now using this other equation of kinematics.
0 = 20-3.33*t
t = 6[s]