Answer:
The time required to receive the echo at the transducer is 
Explanation:
Frequency of ultrasonic beam, f = 5 MHz
It reflects off an object 5 cm deep.
We need to find the time required to receive the echo at the transducer. The ultrasonic wave is an electromagnetic wave. it moves with a speed of light. Let t is the time taken by the wave to go once.
So,



Time to receive the echo at the transducer gets doubled. So,

Hence, this is the required solution.
The answer is A because Brie got her mother a living thing that will provide her comfortable and someone there. The other options are inanimate objects that won’t provide relief.
Well i assume its teaching more about the negative effect of alchohol and not necessarily for people with drinking problems
Physical and chemical laws govern living systems.
Always dial 911 if you think you might be having a heart attack. The EMS crew in your ambulance will route you to the right hospital based on your location. Treatments differ for a STEMI versus NSTEMI heart attack, although there can be some overlap. Hospitals commonly use techniques to restore blood flow to part of the heart muscle damaged during a heart attack.