1. A 0.2Kg stone is tied to the end of a string which is 0.5m long. It is whirled in a horizontal circle at a centripetal acceleration of 10m/s2 . What is the: A) angular speed B) linear speed C) centripetal force 2. A bicycle wheel turns at a constant angular velocity of 10 rad/sec. What is the distance travelled by the bicycle in 30 minutes if the radius of the wheel is 20cm? 3. A bicycle wheel has a radius of 0.4m and a point on its rim moves with a speed of 6m/s. What is its angular velocity? 4. The angular velocity of a body increases from 4rad/sec to 16rad/sec If the angular acceleration ofthe body is 4 rad /s2, calculate: A) the angular distance. B) the angular speed at t=2s. 5. Convert one unit of angular displacement to another. A) 42 rev to radian B) 60 to rad ) 4 radian to rev 6. A trolley moves round a circular track of radius 0.3m at 2rev/s. What is the value of: A) angular speed B) period? C) linear speed

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is