Answer:
v = 10 m/s
Explanation:
Given that,
Distance covered by a sprinter, d = 100 m
Time taken by him to reach the finish line, t = 10 s
We need to find his average velocity. We know that velocity is equal to the distance covered divided by time taken. So,
v = d/t
Hence, his average velocity is 10 m/s.
Answer:
D Magnesia
Explanation:
Ore particles Fe3O4 (magnetite) were found in the region called Magnesia.
Magnesia was an antic city in Asia, named after the inhabitants of Greek Magnesia.
Magnetite is used as an ore, abrasive, in paint production, electrophotography, as a micronutrient fertilizer, and as a high-density concrete aggregate.
The linear velocity of a point p(5,1,3) on the body relative to a point Q(3,4,2) on the axis of rotation is 17.13 m/s.
<h3>What is linear velocity?</h3>
Linear velocity is defined as the rate of change of displacement with respect to time when the object moves along a straight path.
The relationship between linear velocity and angular velocity is given as;
v = ωr
where;
- ω is angular speed of the object
- r is the radius of the circular path
- v is the linear speed of the object
The magnitude of the radius is calculated as follows;
r = √[(5-3)² + (1-4)² + (3-2)²]
r = 3.74 m
The magnitude of the angular speed is calculated as;
ω = √[(-4)² + (1)² + (-2)²]
ω = 4.58 rad/s
The linear speed of the object is calculated as follows;
v = ωr
v = (4.58 rad/s) x (3.74 m)
v = 17.13 m/s
Learn more about linear speed here: brainly.com/question/15154527
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Answer:
The x-component of the electric field at the origin = -11.74 N/C.
The y-component of the electric field at the origin = 97.41 N/C.
Explanation:
<u>Given:</u>
- Charge on first charged particle,
- Charge on the second charged particle,
- Position of the first charge =
- Position of the second charge =
The electric field at a point due to a charge 
at a point 
distance away is given by
where,
= Coulomb's constant, having value 
= position vector of the point where the electric field is to be found with respect to the position of the charge .
= unit vector along .
The electric field at the origin due to first charge is given by
is the position vector of the origin with respect to the position of the first charge.
Assuming, 
are the units vectors along x and y axes respectively.
Using these values,
The electric field at the origin due to the second charge is given by
is the position vector of the origin with respect to the position of the second charge.
Using these values,
The net electric field at the origin due to both the charges is given by
Thus,
x-component of the electric field at the origin = -11.74 N/C.
y-component of the electric field at the origin = 97.41 N/C.
Answer:
Energy
Explanation:
Waves can transfer energy over distance without moving matter the entire distance. For example, an ocean wave can travel many kilometers without the water itself moving many kilometers. The water moves up and down—a motion known as a disturbance. It is the disturbance that travels in a wave, transferring energy.
