Answer: g= 9,81 m/s^2 ( average value for g in the Earth)
Explanation: The value of g depend on the localization on the Earth for example at the poles g is equal to: 9.83 m/s^2
On the other hand, at the aquator g=9.78 m/s^2
Answer: A, a polished pale yellow surface would likely be the best reflector of heat energy.
Viscosity is a kiwi that flows very slowly
Answer:
a) 1.57, 1.61
B 1.91x10^8m/s , 1.86 x 10^8m/s
Explanation:
Ok we know that refractive index is given as = sin i/ sin r
And i is the angle of incidence in the air and r is angle of refraction in the glass,
So we can sa y
for red light n = sin75/sin38.1 = 1.57
and for violet, n =sin75/sin36.7 = 1.61
So
(a) 1.57, 1.61
(b) we know that
Refractive index n = c/v,
where c is speed off light in air and v is speed of light in glass,
So , v = c/n
for red light v = c/1.57 = 1.91 x 10^8 m/s
and for violet light, v = c/1.61 =
1.86 x 10^8 m/s
The right answer is B because a liquid can take the shape of anything its in but it has the same volume