« previous next »

Author Question: A 1200-kg cannon suddenly fires 100kg cannonball at 35m/sWhat is the recoil speed of the cannon? ... (Read 58 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
on: Jul 29, 2018
A 1200-kg cannon suddenly fires 100kg cannonball at 35m/sWhat is the recoil speed of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally.
 
  A) 35 m/s B) 3.5 m/s C) 3.2 m/s D) 2.9 m/s

Question 2

Infra-red radiation is produced by
 
  A) mechanical oscillators that move air back and forth.
  B) molecules in thermal motion.
  C) nuclear vibrations.
  D) electric currents oscillating in human-made electronic devices.
  E) electrons orbiting around the nucleus in atoms.


Ksh22

  • Sr. Member
  • ****
  • Posts: 297
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

big1devin

  • Hero Member
  • *****
  • Posts: 583
Reply #2 on: Jul 29, 2018
TY


Ksh22

  • Sr. Member
  • ****
  • Posts: 297
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Evidence that Light Travels at a Finite Speed Evidence that Light Travels at a Finite Speed
This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande
J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway. J. M. W. Turner, Rain, Steam, and Speed—The Great Western Railway.
A steady needle reading that rises 2 or 3 inches Hg when the engine speed is increased slightly ... A steady needle reading that rises 2 or 3 inches Hg when the engine speed is increased slightly ...
A simple harmonic oscillator has an amplitude of 3.50 cm and a maximum speed of A simple harmonic oscillator has an amplitude of 3.50 cm and a maximum speed of
You ride a motor scooter 8 km in 10 minutes. Your speed is You ride a motor scooter 8 km in 10 minutes. Your speed is
Video: Autonomic Nervous System Animation

For a complete list of videos, visit our video library