This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A soccer ball is kicked with a velocity of 25 m/s at an angle of 45 above the horizontal. What is ... (Read 176 times)

imowrer

  • Hero Member
  • *****
  • Posts: 514
on: Jul 27, 2018
A soccer ball is kicked with a velocity of 25 m/s at an angle of 45 above the horizontal. What is the vertical component of its acceleration as it travels along its trajectory? (Neglect air friction.)
 
  A) g sin(45) upward
  B) g downward
  C) zero
  D) g cos(45) downward
  E) g upward

Question 2

An explosion of genetic diversity similar to that which occurred during the Cambrian Period hasn't happened recently, most likely because
 
  A) evolution of life on Earth is no longer occurring
  B) such an explosion can occur only for simple organisms and not complex ones
  C) there are no more ecological niches available to allow this to happen
  D) of the widespread presence of efficient predators that make it much more difficult for entirely new organisms to appear


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dyrone

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

D


imowrer

  • Member
  • Posts: 514
Reply 2 on: Jul 27, 2018
Gracias!

chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Intradermal injections are administered at a 10–15° angle. Intradermal injections are administered at a 10–15° angle.
Horizontal Pressure Gradients in the Upper Atmosphere Horizontal Pressure Gradients in the Upper Atmosphere
Stretch shoulder in horizontal flexion by grasping at the forearm and reaching the entire arm across ... Stretch shoulder in horizontal flexion by grasping at the forearm and reaching the entire arm across ...
Calculate the velocity of the red rock after collision Angle measured counterclockwise from the ... Calculate the velocity of the red rock after collision Angle measured counterclockwise from the ...
A sled having a certain initial speed on a horizontal surface comes to rest after traveling 10 ... A sled having a certain initial speed on a horizontal surface comes to rest after traveling 10 ...
Ethanol has the molecular formula C2H6O. Which ball and stick model shown above represents ... Ethanol has the molecular formula C2H6O. Which ball and stick model shown above represents ...
Video: Cognitive development by Piaget (Preoperational stage or intelligence)

For a complete list of videos, visit our video library