3 years ago

Y u y u bully me121212121

Physics

2 answers:

aliina [53]3 years ago

5 0

Answer:

omg, dude you're giving out this many free points??

TYSM!!!!

God bless!

Ede4ka [16]3 years ago

3 0

Answer:

wassup

Explanation:

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A rightward force of 246 N is applied to a 35 N suitcase to accelerate it across the floor. The coefficient of friction between

katrin [286]

(35/g) = mass of 3.57kg. (9.8 for g).
 (35 x 0.75) = 26.25N. friction.
 (246 - 26.25) = net 219.76N. accelerating force.
 Aceleration = (f/m) = (219.76/3.57) = 61.56m/sec^2

5 0

3 years ago

A low orbit satellite at 100 km altitude had a camera that resolved a car location to within 0.3 meter. Find the minimum diamete

NeX [460]

Answer:

Minimum diameter of the camera lens is 22.4 cm

The focal length of the camera's lens is 300cm

Explanation:

y = Resolve distance = 0.3 m

h = Height of satellite = 100 km

λ = Wavelength = 550 nm

Angular resolution

$tan\theta\approx \theta =\frac{y}{h}\\\Rightarrow \theta=\frac{0.3}{100\times 10^3}=3\times 10^{-6}$

From Rayleigh criteria

$sin\theta=1.22\frac{\lambda}{D}\\\Rightarrow D=1.22\frac{\lambda}{sin\theta}\\\Rightarrow D=1.22\frac{550\times 10^{-9}}{sin3\times 10^{-6}}=0.2236\ m=22.4\ cm$