Can you me check some science questions
1. what is true for two pieces of iron at the same >
a. the average kinetic energy of their particles is the same.
b. the total kinetic energy of their particles is equal.
c. heat flows from the larger object to the smaller object.
d. heat flows from the object with higher potential energy to the object with lower potential energy.
2.what happens when the temperature of an object increases?
a. the particles move closer together.
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b. the particles move faster.
c. the number of particles increases.
d. the particles stop moving.
3.to remove a tight-fitting lid from a jar, megan runs the lid under hot water. what happens to the jar lid when its temperature increases?
a. the potential energy increases, and the lid contracts.
b. the potential energy decreases, and the lid expands.
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c. the temperature increases, and the lid expands.
d. the temperature decreases, and the lid contracts.

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.

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s