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

Author Question: A concave mirror has A) no focal length. B) a positive or negative focal length ... (Read 111 times)

cool

  • Hero Member
  • *****
  • Posts: 570
on: Jul 29, 2018
A concave mirror has
 
  A)
 
  no focal length.
  B)
 
  a positive or negative focal length depending on the object position.
  C)
 
  a positive focal length.
  D)
 
  a negative focal length.
  E)
 
  a positive or negative focal length depending on the object size.

Question 2

An object is moving with constant non-zero velocity on the +x axis. The position versus time graph of this object is
 
  A)
 
  a horizontal straight line.
  B)
 
  a vertical straight line.
  C)
 
  a straight line making an angle with the time axis.
  D)
 
  a parabolic curve.
  E)
 
  a hyperbolic curve.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kingdude89

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

C


cool

  • Hero Member
  • *****
  • Posts: 570
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


kingdude89

  • Sr. Member
  • ****
  • Posts: 336
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

A lilac, orange and white Satin Peruvian guinea pig (show-length coat) A lilac, orange and white Satin Peruvian guinea pig (show-length coat)
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
Measuring the Weight and Length of an Infant Measuring the Weight and Length of an Infant
Negative feedback control of the female reproductive hormones. Negative feedback control of the female reproductive hormones.
The peptidoglycan layer of Gram-positive bacteria The peptidoglycan layer of Gram-positive bacteria
What is the length of the staircase? What is the length of the staircase?
Video: B cells and antibodies

For a complete list of videos, visit our video library