Answer:
a) t = 4.04 s
, b) x = 89.77 m
Explanation:
This is a one-dimensional kinematics exercise.
a) Let's use caution to find the time, the vehicle speed when stopped is zero
v = v₀ - at
let's reduce the magnitudes to the SI system
v₀ = 160 km /h (1000m / 1km) (1h / 3600s) = 44.44 m / s
0 = v₀ - at
t = v₀ / a
t = 44.44 / 11
t = 4.04 s
b) to calculate the distance traveled we use
x = v₀t - ½ a t²
x = 44.44 4.04 - ½ 11.0 4.04²
x = 179.54 - 89.77
x = 89.77 m
Electric field between the plates of capacitor is given by
potential difference between the plates of capacitor is given by
so above two parameters will depend on the charge of capacitor
rest we know that capacitance of capacitor is given as
so it is independent of charge
so correct answer will be
<em>The electric field across the plates. </em>
<em>The potential across the plates.</em>
Answer:
Inertia depends upon the force applied .
Answer:
Well the reason that elephants have big ears in the first place is to cool off. They flap their ears and use them as fans.
(a) 25lx
(b) 11.11lx
<u>Explanation:</u>
Illuminance is inversely proportional to the square of the distance.
So,
where, k is a constant
So,
(a)
If I = 100lx and r₂ = 2r Then,
Dividing both the equation we get
When the distance is doubled then the illumination reduces by one- fourth and becomes 25lx
(b)
If I = 100lx and r₂ = 3r Then,
Dividing equation 1 and 3 we get
When the distance is tripled then the illumination reduces by one- ninth and becomes 11.11lx