Answer:
h = 0.0259 m
Explanation:
given,
diameter of the cone = 0.0208 m
radius,r = 0.0104 m
angle of inclination,θ = 18°
initial angular velocity, ω_i = 56 rad/s
final angular velocity ,ω_f = 0 rad/s
height, h = ?
Rotational kinetic energy
Moment of inertia of coin
so,
Transnational Kinetic energy
v = r ω
now,
using conservation energy
Kinetic energy of the coin is converted into the potential energy
KE_r + KE_t = PE
h = 0.0259 m
Vertical height gain by the coin is equal to 0.0259 m
Answer:
y and length is directly relation
Explanation:
Given data
A single-slit diffraction pattern is formed on a distant scree
angles involved = small
to find out
what factor will the width of the central bright spot on the screen change
solution
we know that for single slit screen formula is
mass ƛ /area = sin θ and y/L = sinθ
so we can say mass ƛ /area = y/L
and y = mass length ƛ / area .................1
in equation 1 here we can see y and length is directly relation so we can say from equation 1 that the width of the central bright spot on the screen change if the distance from the slit to the screen is doubled
Answer:
a = heart and brain b = lungs
Explanation:
I would believe that this is false.
Answer:
Explanation:
Atomic mass of hydrogen is 1 . so 1 g of hydrogen will have 6.02 x 10²³ atoms
3 g of hydrogen will have 3 x 6.02 x 10²³ atoms . This will give 3 x 6.02 x 10²³ protons and same number of electrons
So number of protons at north pole = 3 x 6.02 x 10²³
charge on these protons = 1.6 x 10⁻¹⁹ x 3 x 6.02 x 10²³ C
= 28.9 x 10⁴ C
similarly total charge on electrons at south pole = 28.9 x 10⁴ C
distance between them = diameter of the earth = 2 x 6356 x 10³ m
= 12712 x 10³ m
Attractive force between these charges
= k q₁q₂ / r² , q₁ ,q₂ are charges and r is distance between charges.
= 9 x 10⁹ x (28.9 x 10⁴)² / (12712 x 10³ )²
= 4.6517 x 10⁻⁵ x 10¹¹
= 4.6517 x 10⁶ N
