The mass of block A is 4 kg, the mass of block B is 3 kg, and the angle of the ramp is θ = 30°. The rope moves over the pulley without slipping. The coefficient of kinetic friction between the block A and the ramp is 0.15. The pulley can be modeled as a uniformly dense cylinder with a mass of 4 kg and a radius of 10 cm. What is the magnitude of the tension (in N) in the rope between block B and the pulley?

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

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation