Answer:
f = 207.85 N
Explanation:
given,
mass of box = 30 kg
angle made with the horizontal = 30.0∘
Horizontal force = 240 N
now calculating normal force
N = F_y + mg
N = F sin θ+ mg
N = 240 sin 30.0∘ + 30 × 9.8
N = 414 N
Now
frictional force = F _x
f = F cos θ
f = 240 × cos 30.0∘
f = 207.85 N
frictional force acting on the box is 207.85 N
Monochromatic means a single colour (single frequency).
The frequency is 4.7 x 10^14 Hertz
The answer would be it will be longer than the 656.3 nm. The reduced mass of positronium is less than hydrogen so the photon energy will be a reduced amount of for positronium than for hydrogen. So this will mean that the wavelength will be lengthier.
Answer:
Some examples of the uses of a screw are in a jar lid, a drill, a bolt, a light bulb, faucets, bottle caps and ball point pens.
Explanation:
Answer:
1.53 m/s²
Explanation:
Given:
Δx = 400 m
v₀ = 0 m/s
v = 35 m/s
Find: a
v² = v₀² + 2aΔx
(35 m/s)² = (0 m/s)² + 2a (400 m)
a = 1.53 m/s²
