A) 50 cm
B) 10000 cm/s
Explanation
Step 1
A)
If you know the distance between nodes and antinodes then use this equation:

then, let

now, replace to find the wavelength

so, the wavelength is
A) 50 cm
Step 2
The speed of a wave can be found using the equation

or velocity = wavelength x frequency,
then,let

replace and evaluate

so
B) 10000 cm/s
I hope this helps you
Given that roller coaster is of tear drop shape
So the speed at the top is given as
v = 11 m/s
acceleration at the top is given as
a = 2.9 g

now we know the formula of centripetal acceleration as



PART B)
now if the total mass is given as
m = 2821 kg
now the Net force will be given as


Now by force equation we will have



PART C)
If the radius of the loop is 14 m
speed is given by same v = 11 m/s
now the acceleration is given as


PART D)
Now for normal force at the top is given by force equation


so here normal force is coming with negative sign so it will not be possible to complete the circular path in this case
So normal force will be ZERO
Answer:
Solids: Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
Explanation:
The answer is a path of destruction up to 50 miles long with destroyed trees and homes.
Tornadoes form from severe thunderstorms. Wind in the higher altitude of the storm moving at a greater velocity than wind at a lower altitude creates a vertical wind shear. The faster-moving winds aloft come from the west and create an updraft when they meet slower-moving wind close to the ground that is moving in the opposite direction. As warm surface air moves upward into the thundercloud, the rotating air creates a vortex.
The image below shows before and after damage of a tornado.
The efficiency of the scissor is 200%.
<u>Explanation:</u>
Efficiency is defined as the ratio of output of any instrument or device or machine to the input supplied to it. So the greater the output the greater will be the efficiency of the device.
As here the work done by us on the system is said to be 10 J so this will be equal to the input work done on the system. And the work done by the system i.e., the scissor is 20 J, so this will be the output work.
So, the efficiency is the ratio of output to input as shown below.
Efficiency =
= 200
So, the efficiency of the scissor is 200%.