Answer:
6.6 beats per second
Explanation:
For a closed-end pipe, the fundamental frequency is given by
where
v is the speed of sound
L is the length of the pipe
Here we have
v = 346 m/s
L = 59.9 cm = 0.599 m
So the fundamental frequency is
The frequency of the signal generator is
So the beat frequency is given by the absolute value of the difference between the two frequencies:
which means that 6.6 beats per second are heard.
Answer:
18.2145 meters
Explanation:
Using the conservation of momentum, we have that:
m1 = m1' is the mass of the astronaut, m2=m2' is the mass of the satellite, v1 and v2 are the inicial speed of the astronaut and the satellite (v1 = v2 = 0), and v1' and v2' are the final speed of the astronaut and the satellite. Then we have that:
The negative sign of this speed just indicates the direction the astronaut goes, which is the opposite direction of the satellite.
If the astronaut takes 7.5 seconds to come into contact with the shuttle, their initial distance is:
The first pressure is illustrative of the maximum output of the heart; the second is because of the elasticity of the arteries in upholding the pressure between beats. Solution:760 mm HG is equivalent to 13.6*.760 m =10.34 m H2O
Then multiply: 470/10.34 * 760mmHg to each of the readings. The answer is about 35 mmHg add this to the current reading of 120/80
Therefore:ΔP=35 mm Hg,Leg blood pressure is 155/115.
Answer: (75°C × 9/5) + 32 = 167°F
Explanation: Thats the formula
Answer:
<em>0.97c</em>
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Explanation:
From the relativistic equation for length contraction, we have
=
where
is the final length of the object
is the original length of the object before contraction
β =
where v is the speed of the object
c is the speed of light in free space = 3 x 10^8 m/s
The equation can be re-written as
/ =
For the length to contract to one-fourth of the proper length, then
/ = 1/4
substituting into the equation, we'll have
1/4 =
substituting for β, we'll have
1/4 =
squaring both side of the equation, we'll have
1/16 = 1 -
= 1 - 1/16
= 15/16
square root both sides of the equation, we have
v/c = 0.968
v = <em>0.97c</em>