Answer:any speed greater than 4.22 m/s
Explanation:
Given
Length of substation =24.5 m
speed of escalator =2 m/s
Time to cross the escalator is 11 s
let v be the speed of boy
Therefore minimum speed to match the record time is
24.5=(v-2)11
v-2=2.22
v=4.22 m/s
Therefore a speed greater than 4.22 m/s is required to beat the record
Based on the principles of heredity, some common medical conditions with a family history include hypertension, hemophilia, shortsighted ness, diabetes, etc.
<h3>What is a family history of a medical condition?</h3>
A family history of a medical condition is a detailed history of members of a family who suffer from a particular disease of a medical condition.
Since characters are passed on from parents to offspring, sometimes certain diseases too are passed on from parents to offspring.
For example, a family may have a history of hypertension, this disease may be due t a defect in a gene, thus, all the offspring in that family who inherit this defect will suffer from the disease.
Other diseases that may be in a family include, hemophilia, shortsighted ness, diabetes, etc.
In conclusion, diseases that are found in a family occur due to the principles of heredity.
Learn more about heredity at: brainly.com/question/957874
#SPJ1
Answer:
<em> -18896.49 V/m</em>
<em></em>
Explanation:
Distance between the two plates = 10 cm = 10 x
m = 0.1 m
Also, one of the plates is taken as<em> zero volt.</em>
a. The potential strength between the zero volt plate, and 7.05 cm (0.0705 m) away is 393 V
b. The potential strength between the other plate, and 2.95 cm (0.0295 m) away is 393 V
<em>Potential field strength = -dV/dx</em>
where dV is voltage difference between these points,
dx is the difference in distance between these points
For the first case above,
potential field strength = -393/0.0705 = -5574.46 V/m
For the second case ,
potential field strength = -393/0.0295 = -13322.03 V/m
Magnitude of the field strength across the plates will be
-5574.46 + (-13322.03) = -5574.46 + 13322.03 =<em> -18896.49 V/m</em>
Answer:
Soccer is a great way to maintain health, fitness, strength, and endurance. Soccer can help with cardiovascular health, lower body fat and improves muscle tone, increases muscle and bone strength, and improves health due to shifting between walking, running, and sprinting. Soccer can also promote teamwork and sharing, increase skills in concentration, persistence, and self-discipline, and can provide an opportunity to build your confidence and self-esteem, and it can also reduce anxiety.
Explanation:
Answer:
a) 200J b) 200J c) -100J d) -300J
Explanation:
Formula for Potential energy
where w (10 N) is weight of the camera and h is position with respect to the reference point.
(a) When ground being zero, then
while ![y_{ground} = 0](https://tex.z-dn.net/?f=y_%7Bground%7D%20%3D%200)
At drone: ![E_d = 10 * 20 = 200 J](https://tex.z-dn.net/?f=E_d%20%3D%2010%20%2A%2020%20%3D%20200%20J%20)
On ground: ![E_g = 10 * 0 = 0 J](https://tex.z-dn.net/?f=%20E_g%20%3D%2010%20%2A%200%20%3D%200%20J)
![\Delta E = 200 - 0 = 200 J](https://tex.z-dn.net/?f=%5CDelta%20E%20%3D%20200%20-%200%20%3D%20200%20J)
(b) When drone being zero, then
while ![y_{ground} = -20](https://tex.z-dn.net/?f=y_%7Bground%7D%20%3D%20-20)
At drone: ![E_d = 10 * 0 = 0 J](https://tex.z-dn.net/?f=E_d%20%3D%2010%20%2A%200%20%3D%200%20J%20)
On ground: ![E_g = 10 * (-20) = -200 J](https://tex.z-dn.net/?f=%20E_g%20%3D%2010%20%2A%20%28-20%29%20%3D%20-200%20J)
![\Delta E = 0 - (-200) = 200 J](https://tex.z-dn.net/?f=%5CDelta%20E%20%3D%200%20-%20%28-200%29%20%3D%20200%20J)
When the point of zero gravitational potential energy is at a person 30m from the ground then
while
and ![y_{drone} = - 10](https://tex.z-dn.net/?f=y_%7Bdrone%7D%20%3D%20-%2010)
(c) Before falling from drone: ![E_d = 10 * (-10) = -100 J](https://tex.z-dn.net/?f=E_d%20%3D%2010%20%2A%20%28-10%29%20%3D%20-100%20J%20)
(d) After landing on ground: ![E_g = 10 * (-30) = -300 J](https://tex.z-dn.net/?f=%20E_g%20%3D%2010%20%2A%20%28-30%29%20%3D%20-300%20J)