Kelly is driving a car with a mass of 800 kilograms in a south direction with a speed of 18 meters/second. dominic is driving a truck with a mass of 1500 kilograms with a velocity of 15 meters/second to the east. they undergo perfectly inelastic collision. what is the magnitude of the final momentum of both the truck and the car. a. 7.0 × 104 kilogram meters/second b. 3.2 × 104 kilogram meters/second c. 2.4 × 104 kilogram meters/second d. 3.7 × 104 kilogram meters/second e. 3.4 × 104 kilogram meters/second

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.