I’m 95% sure it’s covalent bonds.
Answer:
Explanation:
Initial velocity of train u = 3.4 m⁻¹ , Acceleration a = .065 ms⁻² ,
time t = 9.75 x 60 = 585 s.
v = u + at
= 3.4 + .065 x 585
= 41.425 m / s
distance travelled during the acceleration ( s )
s = ut + 1/2 at²
= 3.4 x 585 + .5 x .065 x 585²
= 1989 + 11122.31
= 13111.31 m .
again for slowing process
u = 41.425 m / s
v = u -at
0 = 41.425 - 0.625 t
t = 66.28 s
v² = u² - 2as
0 = 41.425² - 2 x .625 s
s = 1372.82 m
if rebecca stands in front of david at a distance of do and david perceives the position of rebecca at di, di will be +84 cm
<h3>What is focal length ?</h3>
How strongly light converges or diverges depends on an optical system's focal length, which is the inverse of optical power. A system with a positive focus length is said to converge light, whereas one with a negative focal length is said to diverge light.
focal length = +60 cm
magnification m = -0.40
focal length being positive an magnification negative.
given lens is a convex lens.
for a lens
m = di/do and 1/f = (1/di) - (1/do)di
= -0.4do1/f = (1/-0.4do) - 1/do do
= -210 cmdi = -0.4 * -210
di = +84 cm
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Answer:
900 m
Explanation:
Given that,
A hiker travels 300 m [N], turns around and hikes 550 m[S], and then finds out he has to hike back another 50.0 m [N].
We need to find the total distance travelled by the hiker.
Let north be positive and south be negative direction.
Distance = total path covered
D = 300 + 550 + 50
D = 900 m
So, the required distance is equal to 900 m.
