What frequency is received by the ambulance after reflecting from a wall near the person watching the oncoming ambulance (as in the previous problem). the ambulance is moving at 109 km/h and emitting a steady 821-hz sound from its siren

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

The energy equivalent of the rest mass of an electron is

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s