Answer:
A bear normally has a short, thick neck, a rounded head, a pointed muzzle, short ears, and small eyes. Some species have round faces. Bears have poor eyesight, and most have only fair hearing.
Explanation:
Modern Bears are characterized with large body and stocky legs, a long snout, shaggy hair, plantigrade paws with five non-retractile claws and a short tail.
Grizzly bears (Ursus arctos horribilis) have concave faces, a distinctive hump on their shoulders, and long claws about two to four inches long. Both the hump and the claws are traits associated with a grizzly bear's exceptional digging ability. Grizzlies are often dark brown, but can vary from blonde to nearly black.
The brown bear has a slight hump above its shoulder, round ears, a long snout and big paws with long, curved claws that it uses for digging. Unlike the black bear, it can't climb trees. It can weigh between 350-1,500 pounds. When standing on its hind legs it can be up to 5 feet tall.
Hope this helps :)
(I didn't know which type of bear so i did brown bear and grizzly bear)
Answer:
v₂ = 7.6 x 10⁴ m/s
Explanation:
given,
speed of comet(v₁) = 1.6 x 10⁴ m/s
distance (d₁)= 2.7 x 10¹¹ m
to find the speed when he is at distance of(d₂) 4.8 × 10¹⁰ m
v₂ = ?
speed of planet can be determine using conservation of energy
K.E₁ + P.E₁ = K.E₂ + P.E₂
![\dfrac{1}{2}mv_1^2-\dfrac{GMm}{r_1} = \dfrac{1}{2}mv_2^2-\dfrac{GMm}{r_2}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7Dmv_1%5E2-%5Cdfrac%7BGMm%7D%7Br_1%7D%20%3D%20%5Cdfrac%7B1%7D%7B2%7Dmv_2%5E2-%5Cdfrac%7BGMm%7D%7Br_2%7D)
![\dfrac{1}{2}v_1^2-\dfrac{GM}{r_1} = \dfrac{1}{2}v_2^2-\dfrac{GM}{r_2}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7Dv_1%5E2-%5Cdfrac%7BGM%7D%7Br_1%7D%20%3D%20%5Cdfrac%7B1%7D%7B2%7Dv_2%5E2-%5Cdfrac%7BGM%7D%7Br_2%7D)
![v_2^2= v_1^2 + \dfrac{2GM}{r_2}-\dfrac{2GM}{r_1}](https://tex.z-dn.net/?f=v_2%5E2%3D%20v_1%5E2%20%2B%20%5Cdfrac%7B2GM%7D%7Br_2%7D-%5Cdfrac%7B2GM%7D%7Br_1%7D)
![v_2= \sqrt{v_1^2 +2GM(\dfrac{1}{r_2}-\dfrac{1}{r_1})}](https://tex.z-dn.net/?f=v_2%3D%20%5Csqrt%7Bv_1%5E2%20%2B2GM%28%5Cdfrac%7B1%7D%7Br_2%7D-%5Cdfrac%7B1%7D%7Br_1%7D%29%7D)
![v_2= \sqrt{(1.6\times 10^4)^2 +2\times 6.67 \times 10^{-11}\times 1.99 \times 10^{30}(\dfrac{1}{4.8\times 10^{10}}-\dfrac{1}{2.7\times 10^{11}})}](https://tex.z-dn.net/?f=v_2%3D%20%5Csqrt%7B%281.6%5Ctimes%2010%5E4%29%5E2%20%2B2%5Ctimes%206.67%20%5Ctimes%2010%5E%7B-11%7D%5Ctimes%201.99%20%5Ctimes%2010%5E%7B30%7D%28%5Cdfrac%7B1%7D%7B4.8%5Ctimes%2010%5E%7B10%7D%7D-%5Cdfrac%7B1%7D%7B2.7%5Ctimes%2010%5E%7B11%7D%7D%29%7D)
v₂ = 7.6 x 10⁴ m/s
Answer:
The beam used is a negatively charged electron beam with a velocity of
v = E / B
Explanation:
After reading this long statement we can extract the data to work on the problem.
* They indicate that when the beam passes through the plates it deviates towards the positive plate, so the beam must be negative electrons.
* Now indicates that the electric field and the magnetic field are contracted and that the beam passes without deviating, so the electric and magnetic forces must be balanced
![F_{e} = F_{m}](https://tex.z-dn.net/?f=F_%7Be%7D%20%3D%20%20F_%7Bm%7D)
q E = qv B
v = E / B
this configuration is called speed selector
They ask us what type of beam was used.
The beam used is a negatively charged electron beam with a velocity of v = E / B
Answer:
Stars create new elements in their cores by squeezing elements together in a process called nuclear fusion.
Explanation: