Answer:
The time is 0.563 ns.
Explanation:
Given that,
Index of refraction of glass = 1.41
Distance = 12.0 cm
Angle = 33.0°
We need to calculate the refraction angle
Using Snell's law
put the value into the formula
We need to calculate the velocity of beam in glass
Using formula of velocity
Put the value into the formula
We need to calculate the time
Using formula of distance
Hence, The time is 0.563 ns.
54J
You calculate kinetic energy by the equation.
KE= 1/2mv^2
m= mass
v= velocity
then we have
KE = 1/2 x 3 x 6^2
KE = 1/2 x 3 x 36 = 54J
<h3><u>Given</u><u>:</u><u>-</u></h3>
Acceleration,a = 3 m/s²
Initial velocity,u = 0 m/s
Final velocity,v = 12 m/s
<h3><u>To</u><u> </u><u>be</u><u> </u><u>calculated:-</u><u> </u></h3>
Calculate the time take by a car.
<h3><u>Solution:-</u><u> </u></h3>
According to the first equation of motion:
v = u + at
★ Substituting the values in the above formula,we get:
⇒ 12 = 0 + 3 × t
⇒ 12 = 3t
⇒ 3t = 12
⇒ t = 12/3
⇒ t = 4 sec
Answer:
Explanation:
Terry can ride at a speed of
V = 30 miles in 2hours
Speed = distance / time
V = 30 /2
V = 15 mile/hour
So, we want to know the distance traveled in 1.7hours
Then,
Speed = distane / time
Distance = speed × time
Distance =15 × 1.7
Distance = 25.5 miles
So, the distance traveled in 1.7hours is 25.5 miles
