Answer:
The distance of the goggle from the edge is 5.30 m
Explanation:
Given:
The depth of pool (d) = 3.2 m
let 'i' be the angle of incidence
thus,
i = 
i = 67.75°
Now, Using snell's law, we have,
n₁ × sin(i) = n₂ × 2 × sin(r)
where,
r is the angle of refraction
n₁ is the refractive index of medium 1 = 1 for air
n₂ is the refractive index of medium 1 = 1.33 for water
now,
1 × sin 67.75° = 1.33 × sin(r)
or
r = 44.09°
Now,
the distance of googles = 2.2 + d×tan(r) = 2.2 + (3.2 × tan(44.09°) = 5.30 m
Hence, <u>the distance of the goggle from the edge is 5.30 m</u>
The correct answer should be c.The kinetic energy of the water molecules decreases.
If the temperature drops that means that the molecules are coming together. If the temperature rises then it means that the molecules are spreading. If the kinetic energy falls down that means that they are slower which means that they are cooler.
Answer:
The instrument of the Roman Republic that was generally considered to be the most powerful and prestigious was the Senate.
Explanation:
Answer:0.931 s
Explanation:
Given
initial speed=1.1 m/s
height(h)=28 m
after 0.5 sec blue ball is thrown upward
Velocity of blue ball is 24.4 m/s
height with which blue ball is launched is 0.9 m
Total distance between two balls is 28-0.9=27.1 m
Let in t time red ball travels a distance of x m
--------1
for blue ball
-----2
Add 1 & 2
we get
t=0.931 s
after 0.931 sec two ball will be at same height
Answer:
18 V
Explanation:
The 3Ω resistor and the 6Ω resistor are in parallel, so the voltage difference across them is equal.
V = IR
V = (2 A) (3 Ω)
V = 6 V
So the current going through the 6Ω resistor is:
V = IR
6 V = I (6 Ω)
I = 1 A
Therefore, the current going through the 4Ω resistor is the sum:
I = 2 A + 1 A
I = 3 A
The voltage drop across the 4Ω resistor is:
V = IR
V = (3 A) (4 Ω)
V = 12 V
So the total voltage difference between K and L is:
V = 6 V + 12 V
V = 18 V
