Answer:
Distance of metal fragment is 0.0975 m
Explanation:
As we know that the ultrasound will move towards the metal fragment and reflected back to the transducer
So the time interval in which sound will go to the metal fragment and come back is given as
now we know that the speed of the wave in the metal is
v = 1300 m/s
now we know that total distance traveled by the ultrasonic wave is given as
so the depth of metal fragment is half of total distance because in the ultraviolet sound move to and from between transducer and metal fragment so its distance is given as
The average force a 70.0 kg sprinter exerts backward on the track is 84 N.
<h3>
What is law of conservation of energy?</h3>
The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.
E = Fd
where;
- F is the applied force
- d is the displacement of the object
The average force exerted by the sprinter is calculated as follows;
F = ma
where;
- a is the acceleration of the sprinter
- m is mass of the sprinter
The acceleration of the sprinter is calculated as follows;
v² = u² + 2as
where;
- v is the final velocity
- u is the initial velocity
- s is the distance
(8)² = (2)² + (2x25)a
64 = 4 + 50a
60 = 50a
a = 60/50
a = 1.2 m/s²
Average force exerted by the sprinter;
F = ma
F = 70 kg x 1.2 m/s²
F = 84 N
Learn more about average force here: brainly.com/question/16200276
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The correct answer is A. the other light bulbs will turn off, because in a series circuit all of the light bulbs depend on one another since there is only one pathway for the electrons to flow. So if 1 light bulb goes out, the current will break thus stopping the flow of electrons, causing the other light bulbs to go out. Hope I helped!
B. For an object to be in projectile motion, air resistance must be too small to matter.
D. Gravity is the only force acting on an object in projectile motion.
ECNALUBMA
Explanation:
When the word AMBULANCE is reflected on a plane mirror, it is shown as ECNALUBMA.
On a plane mirror, lateral inversion occurs and the position of the words are interchanged.
This is why it is written as ECNALUBMA on the front of Ambulance buses.
When scooters and drivers check their side mirror, they will see the properly written ambulance word due to lateral inversion.
Learn more:
Mirror adjustment brainly.com/question/8737441
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