Answer:
Explanation:
Using the formula for refraction at curved surface
For refraction at first surface
μ₂ /v -μ₁ /u = ( μ₂ - μ₁ )/R
1.5/v -1/-45 =.5/14
v = 111 cm
For refraction at opposite surface ,
u ( object distance ) = 111 - 28 =83 cm
It will act as virtual object for surface 2 so it will be positive in sign
again using the above equation for 2 nd surface we have
1/v - 1.5/83.17 = -.5-=/-14 = 1/28
v = 18.62 cm from second face.
yes, virtual image will be formed.
Answer:
61 N
Explanation:
Sum of forces in the x direction:
∑F = ma
F₂ cos (-55°) − 35 N = 0
F₂ cos (-55°) = 35 N
F₂ = 61 N
Answer:
384.6 m
Explanation:
The length of the runway airport should be long enough to accommodate the aircraft during its acceleration from rest to 161 km/h at rate of 2.6 m/s. We can use the following equation of motion to solve for this:
where v0 = 0 m/s is the initial velocity of the airplane when it start accelerating, v = 161 km/h = 161*1000*(1/60)(1/60) = 44.72 m/s is the airborn speed, a = 2.6 m/s2 is the acceleration, and 
is the distance of the runway, which we care looking for
Answer:
mass of the object is : -
=》15.55 kg
Explanation:
force (f) = mass (M) × Acceleration (A)
=》280 = M × 18
=》M = 280 ÷ 18
=》M = 15.55 kg
Rain that tends to fall in bands on earth is usually caused by : Warm, moist air rising and cooling
First, the water on earth evaporate due to sun's heat and formed cloud. Later on, this water condensed and fall again on the earth. Completing the water cycle
hope this helps
