Answer:
6.86 meters
Explanation:
Let the compression of the string be represented by x, and the height of projection of the toy rocket be represented by h.
So that;
x = 9 cm = 0.09 m
In its rest position (i.e before the launch), the spring has a stored potential energy which is given as;
PE =
K![x^{2}](https://tex.z-dn.net/?f=x%5E%7B2%7D)
=
x 830 x ![(0.09)^{2}](https://tex.z-dn.net/?f=%280.09%29%5E%7B2%7D)
= 415 x 0.0081
= 3.3615
The potential energy in the string = 3.36 Joules
Also,
PE = mgh
where: m is the mass, g is the gravitational force and h the height.
m = 50 g = 0.05 kg, g = 9.8 m![s^{-2}](https://tex.z-dn.net/?f=s%5E%7B-2%7D)
Thus,
PE = 0.05 x 9.8 x h
3.3615 = 0.05 x 9.8 x h
3.3615 = 0.49h
⇒ h = ![\frac{3.3615}{0.49}](https://tex.z-dn.net/?f=%5Cfrac%7B3.3615%7D%7B0.49%7D)
= 6.8602
The height of the toy rocket would be 6.86 meters.
Answer:
615.15 K/m
33 K
Explanation:
A = 0.897 m^2, Heat per second = 27700 W, ΔT/Δx = ?, Δx = 0.0537 m
K = 50.2 W/mK
heat per second = K x A x ΔT/Δx
27700 = 50.2 x 0.897 x ΔT/Δx
ΔT/Δx = 615.15 K/m
Now ΔT = ΔT/Δx x Δx
ΔT = 615.15 x 0.0537 = 33 K
Explanation:
The faster a stream flows, the larger the size of particles it is able to transport.
Fast moving stream due to their velocity and momentum can exert more force and impact larger materials more causing them to move readily.
- The faster the speed of stream the larger the size of sediment it is able to transport.
- This why the edges of oceans contains very coarse particles whereas the still deeper waters are made up of fines.
- A stream is able to transport sediments in three forms:
- As solution in dissolved forms
- As bedload which made up of large boulders.
- As suspension
learn more:
Downcutting brainly.com/question/9259211
#learnwithBrainly
Answer:
Energy = Power × Time
We make Time the subject in this equation
Time = Energy ÷ Power
Time = 10000 ÷ 400
Time = 25seconds
The correct answer should be B) Constant Velocity.
In physics, velocity<span> is defined as the displacement divided by time where displacement is defined as the difference between your final and initial positions. Therefore, when an object travels the same distance every second, the object is said to be moving with </span>constant velocity<span>.
</span>Hope this helps!!!:)