The ideal mechanical advantage (IMA) is the number of times in which the input force is multiplied under ideal conditions. If the real force was only 50N, the distance at which the rope was pulled will be twice the distance given in this item. The answer is 90 cm.
Answer:
Explanation:
i )
In a conservative field like gravitational field , loss of potential energy or work done , depends upon the initial and final point and not the manner in which 2 nd point has been reached . Since the initial and final point is same in both the cases of straight and curved path , final velocity will remain same for both of them .
Hence , due to increased mass of larger child , his kinetic energy will be greater .
ii ) Since the initial and final point is same in both the cases of straight and curved path , final velocity will remain same for both of them .
iii ) Smaller child undergo free fall , therefore , he will fall with acceleration g . The larger child falls on curved path . So , he will have only a component of
vertical g at any moment . hence average acceleration will be less.
A. cgi... they're usually filmed with a greenscreen and is keyed out in editing. known as chroma keying
1. The _________ of a wave is the density of the medium’s particles at the compression of the wave.
2. In which part of the wave are the particles of the medium closer together?
B)compressions
3. In sound waves, the distance between compressions is called the wavelength.
What is the distance between rarefactions called?
D)wavelength
4) A student takes notes in class.
Sound Waves
I. Created by a vibration
A. Vibration: something that causes air molecules to move
back and forth quickly and steadily
II. Move through a medium
A. Solid
B. Liquid
C. Gas
Which line of her notes contains an error?
C)II B
5)Which of these would most likely cause a sound wave?
C)a spoon hitting the side of a bowl while mixing
6)Allison wants to calculate the speed of a sound wave.
Which formula should she use?
D)distance traveled / time
7)When sound is created, it travels to the ear through a
B)medium.
8) Why do waves move faster at higher temperatures and in a solid phase?
D)There is more energy and the particles are closer together.
