A van of mass 3200 kg with velocity +25 m/s collides head on with a sedan of mass 2000 kg with velocity -10 m/s. Calculate the velocity of the sedan after the collision. The van's speed was 0 m/s after the collision? Which of the following is true about the collision between the sedan and the van ?
the gain in momentum of the sedan is numerically the same as the loss in momentum of the van.
the system of the sedan and the van lose momentum from the collision
Impulse of the van is greater than the impulse of the sedan
Impulse of the sedan is greater than the impulse of the van.

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron

The particle in a two-dimensional well is a useful model for the motion of electrons around the indole ring (3), the conjugated cycle found in the side chain of tryptophan. we may regard indole as a rectangle with sides of length 280 pm and 450 pm, with 10 electrons in the conjugated p system. as in case study 9.1, we assume that in the ground state of the molecule each quantized level is occupied by two electrons. (a) calculate the energy of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels. 9.27 electrons around the porphine ring (4), the conjugated macrocycle that forms the structural basis of the heme group and the chlorophylls. we may treat the group as a circular ring of radius 440 pm, with 20 electrons in the conjugated system moving along the perimeter of the ring. as in exercise 9.26, assume that in the ground state of the molecule quantized each level is occupied by two electrons. (a) calculate the energy and angular momentum of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels.

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg