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Q: A marble has a diameter of 2 cm At what distance would the marble have an angular diameter of 1 arc second?
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A bag contains 6 purple marbles and 7 white marbles Two marbles are drawn at random One marble is drawn and not replaced Then a second marble is drawn What is the probability that the first marble?

A bag contains 6 purple marbles and 7 white marbles Two marbles are drawn at random One marble is drawn and not replaced Then a second marble is drawn What is the probability that the first marble?


What is the angular velocity of a 6 and ndashfoot pendulum that takes 3 seconds to complete an arc of 14.13 feet Use 3.14 for and pi.?

The whole point of a pendulum is that is swings back and forth. It does not travel at constant angular velocity: the angular velocity is zero at the two ends of its arc and it reaches a maximum when the pendulum is vertical. Consequently there cannot be a sensible answer to the question as asked.The average angular velocity, which is an entirely different measure, is 45 degrees per second.


What is the linear speed of the tip of the second hand of a watch with a length of 15 mm?

The second hand moves 1/60th of a full rotation per second, this is equivalent to 2π/60 radians per second this is known as the objects angular velocity. the equation linking linear velocity and angular velocity is v=rω where v=linear velocity, ω=angular velocity and r=radius and so we must substitute our values in. v=(15/1000)(π/30)=0.00157 m/s which is 1.57mm/s. notice instead of just putting 15 for the radius, i did 15/1000 in order to change it from millimetres to metres, this gave me the linear velocity in m/s.


A wheel is rotating at 250 revolutions per minute find the angular speed in radians per second?

1 revolution = (2 pi) radians1 minute = 60 seconds250 rpm = [ (250) x (2 pi) radians ] per [ 60 seconds ]= 26.18 radians per second (rounded)


What is the time when a lizard ran 9 meters at a speed of 3 meter per second?

According to mathematics, we know the relation between speed, distance and time . We know by science , speed =distance / time. time = distance / speed. Hence , Time = 9/3. =3 seconds. 3 seconds is the time when a lizard ran 9 meters at a speed of 3 meter per second.

Related questions

How many arc seconds away is Vega?

An arc second is a measure of angular separation, not of distance. It is therefore an inappropriate unit for measuring the distance to a star.


What is the exact size of Mars?

Mars is considered to be the second smallest planet in the solar system. The angular diameter is between 3.5 to 25.1.


What could Kepler's second law be used to measure?

Kepler's second law says that the line joining a planet to the Sun sweeps out equal areas in equal time. Kepler noticed that when a planet's orbit takes it slightly further from the Sun, it moves more slowly. He deduced from calculations made from observations that when the distance increases by 1%, the angular speed decreases by 1%, so the distance times the angular speed, which is the area swept out per second, stays constant. He found this is true all the time for all the planets, a very important discovery in the history of science. The planet's mass times the distance times the angular speed is the angular momentum, and this stays constant. So angular momentum is 'conserved' as the planet goes round, speeding up and slowing down in its orbit. Therefore the second law is now known as a statement of an important physical principle called the Conservation of Angular Momentum. In this way Kepler's second law contributed to scientific progress after his death. Angular speed is measured in radians per second, and the angular momentum is mass times distance times angular speed. For a single particle it is equal to the linear momentum of the particle (mass times speed), while for a rigid body it is the angular speed times the moment of inertia.


What is its SI unit of angular velocity?

Particle displacement is a measurement of distance of the movement of a particle in a medium as it transmits a wave. Distance is measured in meters.


What is the angular velocity in radians per second of the second hand of a clock?

The angular velocity of the second hand of a clock is pi/30 radians per second.


How is rpm related to speed?

More rpm means more speed, but the speed is also related to the diameter of the rotating object. The exact formula is: speed = angular speed x radius (assuming compatible units are used: for example, speed in meters/second, angular speed in expressed in radians/second, radius in meters).


Why do neutron stars tend to have high angular velocities?

That's because of conservation of angular momentum - and the fact that neutron stars are very small. If a star the size of our Sun rotates (for example) once a month, once it shrinks to a diameter of 20-30 km., it will have to rotate several times per second in order to conserve angular momentum.


What is the angular speed of the second hand?

6 degrees/second


Why angular speed is called angular frequency?

Because angular speed is some number of revolutions or angle rotated each second. It has units of s-1 (per second) and is therefore a frequency.


What is unit of angular momentum?

Angular momentum is defined as the cross product of a distance (from the axis of rotation) and a momentum, so you have to use units accordingly. In the SI, that would be meters x kilograms x meters / second, which you can simplify to meters squared x kilograms / second. This is equivalent to joules x seconds.


What is the angular speed of a body vibrating at 50 circus per second?

Angular speed = (2 pi) x (frequency) = 314.16 per second (rounded)


What is the angular velocity of the wheel before braking began if the wheel rotates through 6 radians in 2 seconds as it is uniformly brought to rest?

It was 6 radians per second. Angular acceleration = -3 radians per second2 Initial angular velocity = 6 radians per second. Final angular velocity = zero. Average angular velocity = 3 radians per second. Angular displacement in 2 seconds = 3 x 2 = 6 radians.