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
<span>3640 m/s
The de Broglie wavelength of a particle is expressed by the equation:
λ = h/p
where
λ = wavelength
h = Planck constant
p = momentum
so let's solve for momentum and the substitute the known values and calculate:
λ = h/p
λp = h
p = h/λ
p = 6.62607004x10^-34 Js/2x10^-7 m
p = 6.62607004x10^-34 kg*m^2/s^2 * s/2x10^-7 m
p =3.31303502x10^-27 kg*m/s
Now momentum is defined as mass times velocity. And the mass of an electron is 9.10938356Ă—10^-31 kg. So
p = mv
p/m = v
3.31303502x10^-27 kg*m/s / 9.10938356Ă—10^-31 kg = v
3.63694754774384x10^3 m/s = v
Rounding to 3 significant figures gives 3.64x10^3 m/s or 3640 m/s. That velocity is low enough that we don't need to worry about relativistic effects.</span>
Hello! You didn't list any following but here is my answer for you :)
Your answer should be the same or similar to the count of nucleons !
Answer:
The tension in the rod as the ball moves through the bottom circle is 9.8 N
Explanation:
When the ball is released from rest, the centripetal force equals the weight of the ball. So mv²/r = mg where m = mass of ball = 0.5 kg, v = speed of ball, r = radius of vertical circle = length of rod = 0.5 m and g = acceleration due to gravity = 9.8 m/s²
v = √gr = √9.8 m/s² × 0.5 m = √4.9 = 2.21 m/s
Now at the bottom of the circle T - mg = mv²/r where T = tension in the rod
T = m(g + v²/r)
= m(g + (√gr)²/r)
= m(g+ gr/r)
= m(g + g)
= 2mg
= 2 × 0.5 kg × 9.8 m/s²
= 9.8 N
So, the tension in the rod as the ball moves through the bottom circle is 9.8 N