a distant object is observed to be partially emitting in the frequency of 1.5x10E8 Hz and has a surface temperature of 3000k. Assuming that is object is a perfect black body, what is the spectral radiance of it in this frequency in W/Hz sr m^2

An aircraft performs a maneuver called an "aileron roll." during this maneuver, the plane turns like a screw as it maintains a straight flight path, which sets the wings in circular motion. if it takes it 35 s to complete the circle and the wingspan of the plane is 11 m, what is the acceleration of the wing tip

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Which best represents the law of conservation of mass ?