Although Greenland geographically belongs to North America, the majority of plant species originate from Europe. Greenland’s national flower, Niviarsiaq, which means ‘young woman’, is, however, most common in
North America.
The flower is also known as broad-leaf fireweed, and is found all over the country. It is particularly common in stony soils and sandy riverbeds.
The Greenlandic bluebell can be seen as far north as Upernavik in North Greenland and on the east coast up to Daneborg.
The bog blueberry has sweet blueberries, whilst the more common mountain crowberry produces tasty blackberries that are popular ingredients in many Greenlandic desserts and as an accompaniment to boiled cod liver.
Greenland’s most popular animals:
- birdlife
- seals
- artic fox
- musk ox
- reindeer
- polar bear
- walruses
- whales
Given that,
Acceleration due to gravity = g
Time period :
Time period is defined as,
![T = 2\pi\sqrt{\dfrac{l}{g}}](https://tex.z-dn.net/?f=T%20%3D%202%5Cpi%5Csqrt%7B%5Cdfrac%7Bl%7D%7Bg%7D%7D)
Where, l = length of pendulum
g = acceleration due to gravity
We need to calculate the value of g
Using formula of time period
![T=2\pi\sqrt{\dfrac{l}{g}}](https://tex.z-dn.net/?f=T%3D2%5Cpi%5Csqrt%7B%5Cdfrac%7Bl%7D%7Bg%7D%7D)
![g=\dfrac{4\pi^2l}{T^2}](https://tex.z-dn.net/?f=g%3D%5Cdfrac%7B4%5Cpi%5E2l%7D%7BT%5E2%7D)
Where, T = time period
l = length of pendulum
Hence, The value of g is ![\dfrac{4\pi^2l}{T^2}](https://tex.z-dn.net/?f=%5Cdfrac%7B4%5Cpi%5E2l%7D%7BT%5E2%7D)
Answer:
(a) 0.177 m
(b) 16.491 s
(c) 25 cycles
Explanation:
(a)
Distance between the maximum and the minimum of the wave = 2A ............ Equation 1
Where A = amplitude of the wave.
Given: A = 0.0885 m,
Distance between the maximum and the minimum of the wave = (2×0.0885) m
Distance between the maximum and the minimum of the wave = 0.177 m.
(b)
T = 1/f ...................... Equation 2.
Where T = period, f = frequency.
Given: f = 4.31 Hz
T = 1/4.31
T = 0.23 s.
If 1 cycle pass through the stationary observer for 0.23 s.
Then, 71.7 cycles will pass through the stationary observer for (0.23×71.7) s.
= 16.491 s.
(c)
If 1.21 m contains 1 cycle,
Then, 30.7 m will contain (30.7×1)/1.21
= 25.37 cycles
Approximately 25 cycles.
Answer:
Current, I = 0.0011 A
Explanation:
It is given that,
Diameter of rod, d = 2.56 cm
Radius of rod, r = 1.28 cm = 0.0128 m
The resistivity of the pure silicon, ![\rho=2300\ \Omega-m](https://tex.z-dn.net/?f=%5Crho%3D2300%5C%20%5COmega-m)
Length of rod, l = 20 cm = 0.2 m
Voltage, ![V=1\times 10^3\ V](https://tex.z-dn.net/?f=V%3D1%5Ctimes%2010%5E3%5C%20V)
The resistivity of the rod is given by :
![R=\rho\dfrac{L}{A}](https://tex.z-dn.net/?f=R%3D%5Crho%5Cdfrac%7BL%7D%7BA%7D)
![R=2300\ \Omega-m\dfrac{0.2\ m}{\pi (0.0128\ m)^2}](https://tex.z-dn.net/?f=R%3D2300%5C%20%5COmega-m%5Cdfrac%7B0.2%5C%20m%7D%7B%5Cpi%20%280.0128%5C%20m%29%5E2%7D)
R = 893692.30 ohms
Current flowing in the rod is calculated using Ohm's law as :
V = I R
![I=\dfrac{V}{R}](https://tex.z-dn.net/?f=I%3D%5Cdfrac%7BV%7D%7BR%7D)
![I=\dfrac{10^3\ V}{893692.30\ \Omega}](https://tex.z-dn.net/?f=I%3D%5Cdfrac%7B10%5E3%5C%20V%7D%7B893692.30%5C%20%5COmega%7D)
I = 0.0011 A
So, the current flowing in the rod is 0.0011 A. Hence, this is the required solution.
B because why not i was wondering how ppl are so smart and let me tell ya i don’t know