Answer:
Explanation:
height fallen = h , initial speed u = 0
time t = 2.4s
h = 1/2 x gt²
= .5 x 9.8 x 2.4²
= 28.22 m
Speed of striking the ground
v = gt
= 9.8 x 2.4
= 23.52 m/s
A ) When rock is thrown upwards
initial velocity u = - 19 m/s
g = 9.8 m/s²
h = ut + 1/2 gt²
50 = - 19t + .5 x 9.8 t²
4.9 t² - 19 t - 50 = 0
=5.7 s
B )
V = - -u+gt
= - 19 + 9.8 x 5.7
= 36.86 m/s
Answer:
n = 3
Explanation:
We know that the nth-order maximum for the Young's two-slit experiment is given by the following expression:
dsin(θ) = nλ
If two maxima concides we must have the relation:
nλ1 = mλ2 --- eq1
In this particular experiment
m = n+1
λ1 = 680 nm
λ2 = 510 nm
Replacing m in eq1 we have
nλ1 = (n+1)λ2
Solving for n we have:
n = λ2/(λ1-λ2)
Therefore:
n = 510/(680-510)=3
In a parallel circuit, both bulbs are connected directly to the power supply
or battery. As long as the power supply is capable of running both of them,
neither bulb is aware of the other's presence. If one bulb fails 'open', the
other bulb doesn't change at all. The voltage across it, the current through it,
its resistance, and its brightness,all remain exactly as they were before.
Momentum = (mass) x (speed)
Divide each side by (speed): Mass = (momentum) / speed
Mass = (45,000 kg-m/s) / (30 m/s) =
1,500 kg .
Answer:
Chemical to kinetic and thermal.
Explanation:
You would eat the food (chemical) than you would jog and move around (kinetic). While running your body would also give off heat (thermal).Than your body would sweat to cool itself down.