A 200 kg box is pulled by 2600 N of force at an angle of 30 degree with horizontal line. If the friction coefficient of the box on the surface is o.4, find the acceleration of the box. If the box pushed by 20 degree using the same force, what will be the acceleration of the box?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?

The brightest star in the night sky in the northern hemisphere is sirius. its distance from earth is estimated to be 8.7 light years. a light year is the distance light travels in one year. light travels at a speed of 3.00 × 108 m/s. calculate the distance from earth to sirius in miles. (1 mi = 5280 ft) g