Assume: the bullet penetrates into the block and stops due to its friction with the block. the compound system of the block plus the bullet rises to a height of 0.15 m along a circular arc with a 0.27 m radius. assume: the entire track is frictionless. a bullet with a m1 = 30 g mass is fired horizontally into a block of wood with m2 = 5.29 kg mass. the acceleration of gravity is 9.8 m/s 2 . 0.27 m 5.29 kg 30 g vbullet 0.15 m calculate the total energy of the composite system at any time after the collision.

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

Which object is most likely represented by a dot?

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud