Explanation:
When a tennis ball is thrown against a wall it appears to bounce back with exactly the same speed as it struck the wall. The momentum will remain conserved in this case. The law of conservation of momentum states that when no external force is acting on a system, the initial momentum is equal to the final momentum.
Here, this is a case of inelastic collision. The kinetic energy is not conserved in this case. Some of the energy is lost in the form of heat, sound etc.
Answer:
308 m/s
Explanation:
In a closed tube, the length of the tube (L) is related to the wavelength of the standing wave () by the relationship
In this problem, the length of the tube is L=20 cm=0.20 m, so we can find the wavelength of the standing wave:
And no we can find the speed of the sound wave by using the following equation:
where is the frequency of the wave. So, we find
Explanation:
The kinetic energy is basically the energy possesses by virtue of a body's motion
1. The truck moving to the quarry
let the mass be x
and the velocity is given as 20m/s
we know that the kinetic energy is given as
KE=1/2mv^2
KE=1/2(x)*20^2
KE=1/2(x)400
KE=200x
2. The truck leaving to the quarry
let the mass be 2x
and the velocity is given as 20m/s
we know that the kinetic energy is given as
KE=1/2mv^2
KE=1/2(2x)*20^2
KE=1/2(2x)400
KE=400x
From the analysis the kinetic energy is a function of mass, doubling the mass doubles the kinetic energy
To solve this exercise we must apply the concept of Flow as the measure given to determine the volume of a liquid flowing per unit of time, and that can be calculated through velocity and Area, mathematically this can be determined as
Q = Discharge of Flow
A = Cross sectional Area
Velocity
The area of the cross section of the capillary tube is
The total Area by this formula:
Where,
Stands for area of capillary
n = Stands for number of blood vessels
Finally replacing at our first equation,
Therefore the average speed, in centimeters per second, of blood flow through each capillary vessel is 1.66cm^3/s
<span>A hypothesis is testable when you can create an experiment to study the proposition contained within the hypothesis. For example, the hypothesis ‘Santa travels slower than a unicorn’ is testable in theory by measuring the speeds of both, but it is not truly testable because neither exists in reality.</span>