This topic contains a solution. Click here to go to the answer

Author Question: A 900-kg car traveling 30.0 south of east at 12.0 m/s suddenly collides with a 750-kg car traveling ... (Read 145 times)

vicky

  • Hero Member
  • *****
  • Posts: 586
A 900-kg car traveling 30.0 south of east at 12.0 m/s suddenly collides with a 750-kg car traveling north at 17.0 m/s.
 
  The cars stick together after colliding. What is the speed of the wreckage just after the collision?
  A) 7.21 m/s
  B) 12.2 m/s
  C) 20.4 m/s
  D) 25.0 m/s
  E) 17.3 m/s

Question 2

An electron and a positron, both essentially at rest, annihilate each other, emitting two identical photons in the process.
 
  What is the wavelength of these photons? The mass of an electron or positron is 9.11  10-31 kg. (h = 6.626  10-34 J  s, c = 3.00  108 m/s)
  A) 3.07 pm
  B) 1.21  10-12 pm
  C) 2.42 pm
  D) 1.73 pm
  E) 3.46 pm


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

BAOCHAU2803

  • Sr. Member
  • ****
  • Posts: 316
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly





 

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

For a complete list of videos, visit our video library