Answer:
ΔL = 5.09x10^-5 m
Explanation:
data provided by the exercise:
m = 56 kg
L = 35 cm = 0.35 m
r = 1.5 cm = 0.015 m
Y = 1.6x10^10 N/m^2
F = 3 m*g
A = pi*r^2
The Young´s modulus is equal to:
Y = (F/A)/(ΔL/L) = (F*L)/(A*ΔL)
Clearing ΔL, we have:
ΔL = (F*L)/(A*Y) = (3*56*9.8*0.35)/(pi*(0.015^2)*1.6x10^10) = 5.09x10^-5 m
Answer:
minimum distance will be 13.33 m
Explanation:
We have given the speed of both the car = 80 km/h
We know that 1 km =1000 m
And 1 hour = 60×60 =3600 sec
So
Reaction time is given as t = 0.60 sec
Minimum distance will be equal to the distance driver needed during reaction time
So minimum distance = u ×t =22.22 ×0.60=13.33 m
Answer:
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area
Explanation:
Inside the torch, they usually use copper or brass to conduct electricity.
This one is answered exactly like the one about the thunder and lightning that you posted a few minutes earlier.
Time = (distance covered) / (speed)
Time = (5,000 km) / (790 km/hr)
<em>Time = 6.329 hours</em>
That's 6 hours 19 minutes 44.8 seconds