B. Increased cases of asthma,
the large amount of dirt/dust irritates our breathing tracts and those with asthma may suffer from an episode much easily breathing in polluted air.
_Brainliest if i helped!
Answer:
a) Final velocity of second bowling pin is <u>2.5m/s</u>.
b) Final velocity of second bowling pin is <u>3 m/s</u>.
Explanation:
Let 'm' be the mass of both the bowling pin -
m = 1.5 kg
Initial velocity of first bowling pin -
In any type of collision between two bodies in horizontal plane , momentum is conserved along the line of impact.
a) Since , initial velocity of second bowling pin is 0 m/s -
Initial momentum ,
Final velocity of first bowling pin , [Considering initial direction of motion of the first bowling pin to be positive]
Let be the final velocity of the second bowling pin.
∴ Final momentum ,
.
Now ,
∴
∴ = 3 - 0.5 = 2.5 m/s
∴ Final velocity of second bowling pin is 2.5 m/s.
b) Since , initial velocity of second bowling pin is 0 m/s -
Initial momentum ,
Final velocity of first bowling pin , [given][Considering initial direction of motion of the first bowling pin to be positive]
Let be the final velocity of the second bowling pin.
∴ Final momentum ,
.
Now ,
∴
∴ = 3 - 0 = 3 m/s
∴ Final velocity of second bowling pin is 3 m/s.
Let's calculate the angle between two spots, 0.5 cm apart,
that are 10m away from you.
1 m = 100 cm
10m = 1,000 cm
The angle between the two spots is very very close to the angle
whose tangent is
0.5cm/1,000cm = 0.0005 .
That angle is tan⁻¹(0.0005) = 0.0005 radian = 0.029 degree .
Matilda is looking at two stars that appear to be 0.001 radian apart.
That's (0.001 / 0.0005) = 2 = TWICE as far apart as Arthur can distinguish.
As long as Arthur and Matilda are on the same planet while looking at
these two stars ... or as long as they're even in the same solar system ...
Arthur will have no trouble separating them.
D. a train on a straight track