Jake and brenda drove at a speed of 30 miles for one hour then they turned around and drove 45 miles per hour until they were back where they started what is the true or what is true about their average speed and average velocity
Solution 1
Answer:
Average speed is greater than average velocity. Average velocity is zero.
Explanation:
Average speed is calculated by:
Distance is the length of the total path traveled.
Average velocity is given by:
Displacement = final position - initial position.
Since, final position =initial position, Displacement = 0, therefore, average velocity = 0
It can be concluded that average velocity is zero and average speed is greater than average velocity.
Solution 2
📚 Related Questions
Answer: Option (B) is the correct answer.
Explanation:
When a person without any selfish motive does something for the benefit of others then it is known as altruism.
For example, a person organizes a food stall every weekend for the poor people of a village.
Therefore, we can conclude that an action that benefits others but not ourselves is an example of altruism.
al·tru·ism
ˈaltro͞oˌizəm/Submit
noun
the belief in or practice of disinterested and selfless concern for the well-being of others
F = Gm1m2/d^2, where F = gravitational force, m1 & m2 = mass of the two bodies, G = Gravitational constant, d = distance between the bodies.
Substituting;
8.64*10^-8 = (6.67*10^-11*90*90)/d^2
d^2 = (6.67*10^-11*90^2)/(8.64*10^-8)
d = Sqrt [(6.67*10^-11*90^2)/(8.64*10^-8)] = 2.5 m
The two men are 2.5 m apart.
Answer:
2.5
Explanation:
-a p e x
Solution:
The fundamental frequency in a standing wave is given by
where L is the length of the string, T the tension and m its mass. If we plug the data of the problem into the equation, we find
The wavelength of the standing wave is instead twice the length of the string:
So the speed of the wave is
And the time the pulse takes to reach the shop is the distance covered divided by the speed:
B.) decreaseÂ
In fact, the relationship between frequency, wavelength and speed of a wave is given by
where
f is the frequency
v is the speed of the wave
The speed v of a wave depends only on the properties of the medium; in this problem the medium does not change, so the speed remains the same.Â
Instead, the frequency f increases: from the previous equation we see that the wavelength is inversely proportional to the frequency, therefore if the frequency increases, the wavelength will decrease.
fb = |f2-f1|
In this case, the frequency of unknown fork must be between 240 Hz and 250 Hz. Then,
4 = x - 240 => x = 240+4 = 244 Hz
This is true since;
6 = 250 - 244 (given in the second case).
Therefore, the unknown frequency is 244 Hz.
Answer;
Optic nerve
Explanation;
- Optic nerve is a cable-like bundle of nerve fibers, that connects and transmits visual information from the eye to the brain.
- Optic nerves are made of retinal ganglion cell axons. Optic nerve recieves light signals from photoreceptor cells via intermediate neurons, bipolar and amacrine cells.
- The retina, which consists of three layers of neurons (photoreceptor, bipolar, and ganglion) is responsible for detecting the light from these images and then causing impulses to be sent to the brain along the optic nerve.
Optic nerve: carries messages from the photoreceptors in the retina to the brain
Answer : The correct option is, (A) Meters per second squared
Explanation :
Acceleration : It is defined as the rate of change of velocity in unit time. It is a vector quantity. That means it is depend on the magnitude and the direction.
The S.I unit of of acceleration is, meter per second square
From the given options, option A is represent the unit of acceleration.
The option B represent the unit of energy.
The option C represent the unit of mass.
The option D represent the unit of force.
Hence, the correct option is, (A)
This is the Right One.
The answer is friction. The force acting upon the comparative motion of solid surfaces, liquid layers, and material elements sliding in contradiction of each other. When sides in contact move comparative to each other, the friction amid the two surfaces changes kinetic energy into thermal energy; in other words work to heat.
Explanation:
Friction. You will discern that natural fibers, wool, and cotton do not have static. All performed fibers comprise elements that when scraped together will have static electricity.would have believed that the stainless-steel drum and another metalwork of the dryer would remove the static charge to earth. Unless of course your machine is not earthed .