Aresearcher studying a line of cancer cells notices that cellular content of rhobtb3 and cyclin e1 increase and decrease through the cell cycle. he hypothesizes that rhobtb3 signaling regulates the production of cyclin e1 and the entry of the cell into mitosis. based on the data below, explain why his results do not support this hypothesis. identify what conclusions are supported by this data. suppose that the researcher can engineer a cell line in which rhobtb3 expression can be induced by the addition of a drug. design an experiment using this cell line to test whether rhobtb3 regulates the production of cyclin e1. describe what results he can expect if his hypothesis is correct.

mention the spill to the teacher clean the area and throw the broken pieces away

explanation:

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied