Answer:
23
Explanation:
First, we need to convert the hose diameter from inches to meters.
0.75 in × (2.54 cm / in) × (1 m / 100 cm) = 0.0191 m
Calculate the flow rate given the velocity and hose diameter:
Q = vA
Q = v (¼ π d²)
Q = (0.30 m/s) (¼ π (0.0191 m)²)
Q = 8.55×10⁻⁵ m³/s
Find the volume of the pool:
V = π r² h
V = π (1.5 m)² (1.0 m)
V = 7.07 m³
Find the time:
t = V / Q
t = (7.07 m³) / (8.55×10⁻⁵ m³/s)
t = 82700 s
t = 23 hr
Answer:
Explanation:
Temperature is directly proportional to thermal energy of a body.
Thermal energy is one of the numerous forms of kinetic energy which dependent on the motions of the particles in a body.
When the temperature of a body increases, it possess more kinetic thermal energy. In this case, the molecules of the body gains more energy and begins to vibrate until they attain maximum kinetic energy.
The higher the temperature the more the kinetic energy.
Answer:
A particle at t1= -2 seconds is at x1=4.8cm and at t2=4 seconds is at x2=9cm. Why can’t you calculate the average speed from this data?
Explanation:
the average speed of the distance travelled is needed to be know and we were only given displacement.
After one half-life, 8 g of radioactive isotope will remain in the sample.
<h3>What is radioactivity?</h3>
The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.
The following formula is used to compute the number of half lives elapsed:
Hence,8 gram of radioactive isotope remains in the sample after 1 half-life.
To learn more about the radioactivity, refer to the link;
brainly.com/question/1770619
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Answer:
1.000000×10−7 Joules
Explanation:
Just search the internet.