Answer:
a) 25.5°(south of east)
b) 119 s
c) 238 m
Explanation:
solution:
we have river speed
=2 m/s
velocity of motorboat relative to water is
=4.2 m/s
so speed will be:
a)
=
+
solving graphically

=4.7 m/s
Ф=
=25.5°(south of east)
b) time to cross the river: t=
=
=119 s
c) d=
=(2)(119)=238 m
note :
pic is attached
Answer:
v = 0.999981c m/s
Explanation:
Using the time dilation equation

T = stationary time = 100 years
T₀ = 11/12 years = 0.917 years
v = speed of travel in the space = ?
c = speed of light = 3 * 10⁸ m/s


v = 299987395.57 m/s
v = 2.99 * 10⁸ m/s
v = 0.999981c m/s
Answer:
19.642 cm
Explanation:
f₁ = Focal length of first lens = 11 cm
f₂ = Focal length of second lens = -25 cm
Combined focal length formula

Combined focal length is 19.642 cm
Answer: The amount of charge in microCoulombs is 1.18 ( Q = 1.18µC).
The correct option is 2
Explanation: Please see the attachments below