A) a 100-watt lightbulb radiates energy at a rate of 100 \({\rm j/s}\) (the watt, a unit of power, or energy over time, is defined as 1 \({\rm j/s} if all of the light emitted has a wavelength of\(520{\rm nm}\), how many photons are emitted per second? (assume three significant figures in this calculation.)express your answer using three significant figures. b) how much energy (in \({\rm j}\)) is contained in 1.00 mole of 490\({\rm nm}\) photons? express your answer to three significant figures and include the appropriate units. c)part awhat is the de broglie wavelength of an electron traveling at 1.48

sry but any answer choices

(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

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.