Answer: Sound wave can be described by five characteristics Wavelength , amplitude, time period, frequency and velocity or speed
Explanation:
Answer:
<em>An average net force of 5200 N is needed to stop the car</em>
Explanation:
<u>Cinematics and Dynamics</u>
Cinematics describes the variables involved in the movement without dealing with its causes. There are four main concepts in cinematics: Velocity (or its scalar equivalent, the speed), acceleration, time, and displacement (or the scalar equivalent, distance).
The acceleration can be calculated by:

The initial speed is vo=28 m/s, it stops (vf=0) in t=10.5 seconds, thus the acceleration is:


The acceleration is negative because the car loses speed.
Knowing the mass of the car m=1950 Kg, we can calculate the net force required to stop the car by using the formula:
F = m.a =1950*2.67
F = 5200 N
An average net force of 5200 N is needed to stop the car
It is the only one that has both a partially molten metallic core and reasonably rapid rotation.
This indicates nucleus of an atom constantly positively charged. an atom has an nuteral overall charge because it has the same amount of electrons as protons
Answer:
refraction
Explanation:
When a ray of light passes from one medium to another medium, it deviates from its path, this phenomenon is called refraction.
When the ray passes from rarer medium to denser medium it bends towards the normal and if the ray passes from denser medium to rarer medium, it bends away from the normal.
Here, the ray passes from air to glass, so refraction takes place.