Answer:
F₁ = 4.29 x 10⁵ N
Explanation:
The total force required to move the freight train with the given acceleration is given by the following formula:
F = ma + f
where,
F = Total Force Required from both engines = ?
m = equivalent mass of system = 2(8 x 10⁵ kg) + 5.5 x 10⁵ kg = 21.5 x 10⁵ kg
a = required acceleration = 5 x 10⁻² m/s²
f = force of friction = 7.5 x 10⁵ N
Therefore,
F = (21.5 x 10⁵ kg)(0.05 m/s²) + 7.5 x 10⁵ N
F = 8.575 x 10⁵ N
Now, for identical forces in each engine can be given as:
Force exerted by each engine = F₁ = F/2
F₁ = 8.575 x 10⁵ N/2
<u>F₁ = 4.29 x 10⁵ N</u>
Answer
given,
wavelength (λ) = 650 nm
angle = 5°
using bragg's law
d = 7.46 x 10⁻⁴ cm
number of slits per centimeter
= 
b) wavelength of two rays 650 nm and 420 nm
d = 2 x 10⁻6 m
we now,
for 650 nm
θ = 40.54°
for 450 nm
θ = 24.83°
now, difference
|θ_{650} -θ_{420}| =40.54°-24.83°
|θ_{650} -θ_{420}| =19.71°
Answer:
4.00m
Explanation:
at that instant where it is dropped all the mechanical energy is gpe which is 71.9
and the formula for gpe = mass (1.80) * height * gravitational field strength (i'm using 10 m/s2)
height of football stadium
= 71.9/[(1.80)(10)]
= 71.9/18.0
= 3.99444..
= 4.00 (3 sf)
Answer:32km/hr
Explanation:
Speed=distance/time
Speed=60/2 =30km/hr speed=68/2=34km/he
Average speed=(30+34)/2 =64/2=32km/hr
