Me with thses questions 3 sentences i beg you! a body is placed on a rough inclined plane. why does the frictional force decrease with the increase of angle of inclination? when a moving bus stops suddenly, the passengers fall forward. why does this happen? the lesser the mass, the greater the acceleration for the given value of force. why does this happen?

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

Who was the first scientist to measure speed as distance over time?