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At the low point in its swing, a pendulum bob with a mass of 0.2 kg has a velocity of 5m/s. How high will the bob swing above this low point?

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A 0.2 kg ball is twirled at the end of a string in a horizontal circle with a radius of 0.6 m. The ball travels with a constant speed of 4.0m/s. What are the values of the horizontal and vertical components of the tension in the string?

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what is the best book to read to understand statistical mechanics?

thank you

thank you

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3.1A tungsten filament is 35 mm long and has a radius of 7.5 mm. Calculate the current emitted from this filament at temperatures of 2400 °C and 2500 ºC.

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can a compound semi-conductor be considered as extrinsic semi-conductor due to its compound form?

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If light travels in a straight line, why a rainbow appears curved?

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A hollow cylinder of radius 10 cm rotates about its axis which is vertical. A small body remains in contact with the inner wall if the frequency of rotation is 200 per minute but falls at lower frequencies. Find the com-efficient of friction between the body and the cylinder.

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how the energy is produced in a nuclear reactors?

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A hiker sets out on a trek heading [N35degreesE] at a pace of 5.0km/h for 48.0 min. He then heads west at 4.5km/h for 40.0 min. Finally, he heads [N30degreesW] for 6.0km/h, until he reaches the camground 1.5 hours later. What is his total displacement?

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1.Below is the description of gthe position in metres of the puck as it moves in the x plane where time is in seconds ,

X=t^3+2t^2+t

(a)How long did the puck move after 2 seconds?

(b)What is the velocity of the puck at 2 seconds?

(c)What is the acceleration of the puck at 2 seconds?

2.An object moves in a uniform circural motion with centripetal acceleration of 25 m/s^2 ,if the diameter of the circle is 70m,

(a)Find the velocity at which the object is moving.

(b)Find the revolution period of the motion.

X=t^3+2t^2+t

(a)How long did the puck move after 2 seconds?

(b)What is the velocity of the puck at 2 seconds?

(c)What is the acceleration of the puck at 2 seconds?

2.An object moves in a uniform circural motion with centripetal acceleration of 25 m/s^2 ,if the diameter of the circle is 70m,

(a)Find the velocity at which the object is moving.

(b)Find the revolution period of the motion.

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