1. Engineering
  2. Other
  3. q1 a a wheel 90 cm in diameter turns at...

Question: q1 a a wheel 90 cm in diameter turns at...

Question details



(a)      A wheel 90 cm in diameter turns at 100 rev/min. What is the angular velocity of the wheel (in radians per second) and what is the linear velocity of a point on the rim of the wheel (in meters per second)?

(b)      An air compressor is powered by a 160 rad/s electric motor using a V belt drive. The motor pulley is 8 cm in radius, and the tension in the V belt is 120 N on one side and 50 N on the other. Find the power of the motor?


Q2:  A spring has a 0.5-s period of oscillation when a 35-N weight is suspended from it. By how much wills the spring stretch when a 50-N weight replaces the 35-N weight? 


(a)   How many times more intense than the 40-dB sound of a person talking is the 100-dB sound of a power lawn mower? 


(b)  A 1.4-kW radio transmitter is coupled to an antenna by a cable whose attenuation is 1.8 dB. How much power reaches the antenna? 


(a)   A newspaper is held 6 m from a 2000-cd street lamp at midnight. What is the maximum illumination of the newspaper? 

(b) Find the solid angle subtended at the center of a sphere of radius 3.0 m by an area of 100 cmon its surface. 

Q5: ) 

A match 5 cm long is placed 20 cm in front of a concave mirror whose focal length is 50 cm. Find the location, size, and nature of the image.


(b) A double convex lens has surfaces whose radii are 40 cm and 50 cm. The index of refraction of the glass is 1.52. Find the focal length of the lens.


Q6 A horizontal pipe 3.5 cm in radius is joined to a pipe 14 cm in radius.

(a)   If the velocity of seawater in the small pipe is 6 m/s and the pressure in there

 is , find the velocity and pressure in the large pipe.

(b)   What is the rate of flow through the pipe?  





Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution