Explanation:
45 m/s × (3.28 ft/m) × (1 mi / 5280 ft) × (3600 s/h) = 101 mph
This is actually 3 significant figures. To write in 2 significant figures, you must use scientific notation:
1.0×10² mph
Answer:
Explanation:
Given that:
The conductivity of the material 
= 5.0 s/m
; &
The electric field intensity of the material E = 250 sin(10¹⁰ t) V/m
(a) The conduction current density 
(b) Displacement current density 
Recall that:
∴
(c) The frequency at which 
will have the same magnitude is:
By substitution
f = 90 GHz
Answer:
1.08
Explanation:
This is the case of interference in thin films in which interference bands are formed due to constructive interference of two reflected light waves , one from upper layer and the other from lower layer . If t be the thickness and μ be the refractive index then
path difference created will be 2μ t.
For light coming from rarer to denser medium , a phase change of π occurs additionally after reflection from denser medium, here, two times, once from upper layer and then from the lower layer , so for constructive interference
path diff = nλ , for minimum t , n =1
path diff = λ
2μ t. = λ
μ = λ / 2t
= 626 / 2 x 290
= 1.08
The momentum of a 5kg object that has a velocity of 1.2m/s is 6.0kgm/s.
<h3> MOMENTUM:</h3>
Momentum of a substance is the product of its mass and velocity. That is;
Momentum (p) = mass (m) × velocity (v)
According to this question, an object has a mass of 5kg and velocity of 1.2m/s. The momentum is calculated thus:
Momentum = 5kg × 1.2m/s
Momentum = 6kgm/s.
Therefore, the momentum of a 5kg object that has a velocity of 1.2m/s is 6.0kgm/s.
Learn more about momentum at: brainly.com/question/250648?referrer=searchResults
F=ma so,we have
f=300.3=900 N
but you should say 3 m/s^2
