In a lab set up, two frictionless carts are placed on a horizontal surface. cart a has a mass of 500 g and cart b’s mass is 1000 g. between them is place an ideal spring (very light) and they are squeezed together carefully, thereby compressing the sting by 5.50 cm. both carts are then released and b’s recoil speed is measured to be 0.55 m/s. a- will cart’s a speed be:
a- greater than b’s speed
b- less than b’s speed
c- the same as b’s speed
b- determine a’s recoil speed to see if your conjecture in the first part was correct.
c- determine the constant of the spring k.

What are similarities and differences of reflection, refraction, diffraction and absorption?

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

In the future, people will only enjoy one sport: electrodisc. in this sport, you gain points when you cause metallic discs hovering on a field to exchange charge. you are an electrodisc player playing the popular four disc variant. the disks have charges of qa = −8.0 µc, qb = −2.0 µc, qc = +5.0 µc, and qd = +12.0 µc. (1) you bring two disks together and then separate them. you measure the resulting charge of these two disks and find that it is +5.0 µc per disk. which two disks did you bring together? (a) a and b (b) a and c (c)a and d (d)b and c(e) b and d (f) c and d. (2) you bring three disks together and then separate them. you measure the resulting charge of these three disks and find that it is +3.0 µc per disk. which three disks did you bring together? a, b, and c (a) a, b, and d (c) a, c, and d (d) b, c, and d. (3) given the resulting charge of each disk measured in (b) is +3.0 µc, how many electrons would you need to add to a disk of this charge to electrically neutralize it? electrons