Answer:
a
Explanation:
When people jump from greater height, energy gets absorbed into the muscles as potential. And when the person flexes her legs on landing energy is trans formed not only into elastic energy in the bones, but also into elastic energy in other tissues and into thermal energy.
air resistance is very small hence, negligible. So, the statement a is correct and rest are wrong.
#1). First of all, the 220 volts has to be changed to something near 110 volts. The most convenient way to do that is with a 2:1 step-down transformer. Those are readily available, for exactly this purpose, in kits of "travelers' accessories".
#2). Since Steve's immediate concern is his alarm clock, there's another important detail that he needs to consider. The power from the electrical outlets in the US is supplied at 60Hz, whereas the power in most of the rest of the world comes out at 50Hz. Many clocks use the frequency of the power outlet to keep time. If his 110V alarm clock is one of those and is designed for 60Hz, then if it's run on 50Hz power, it'll lose 10minutes of time every hour !
Steve's easiest and most economical solution might simply be to buy an alarm clock when he lands in New Zealand.
Rubber,Plastic,I think thats it but everyone that can float has a high buoyancy
This problem is going to be pretty long to solve. So, prepare.
We’re interested in the change in our x position. So we have to break the velocity vector up into its components. Do cosine of 50 and then multiply by the magnitude of the velocity. I got 20.57m/s. That’s our initial velocity. And remember, horizontal acceleration is zero. The vertical acceleration, or any vertical component, has no effect on the horizontal components. In order to solve this problem, we want to utilize this equation:
Change in x-position = Vix*t
Let’s solve for time, which is dependent on the vertical components. The projectile will stop when it vertically hits the ground. Generally you want to use this equation for solving for time:
Yf = Yi + Viy*t + 1/2at^2
We didn’t solve for the vertical component yet, so let’s do that now. (Sine of 50)*(32) = 24.51m/s
Let’s now plug everything in:
0 = 0 + 24.5t - 4.9t^2
0 = 24.5t - 4.9t^2
0 = t(24.5 - 4.9t)
-24.5 = -4.9t
t = 5 seconds
The hard stuff is pretty much over. Put that 5 seconds into the other equation I said we wanted to use to solve the problem
Change in x-position (range) = (20.57)*(5)
= 102.85 meters
Answer B
Answer: A) Transformer
Explanation: A Transformer is an apparatus, device or a component in a system that is used to convert high voltage into low voltage. It is used to either increase or decrease the voltage of an alternating current.
A transformer uses the basic principle of electro magnetic induction, having two or more coils, the voltage is changed from one coil to another but with thesame frequency as alternating current energy passes through them.
