A roller coaster moves 200ft horizontally and then rises 135ft at an angle of 30° above the horizontally. Next, it travels 135ft at an angle of 40° below the horizontal. Use graphical techniques to find the roller coaster's displacement from its starting point to the end of this movement.

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.