A 4.0-cm tall object is placed 60 cm away from a converging lens ...

[2125004343]

A 4.0-cm tall object is placed 60 cm away from a converging lens of focal length 30 cm. What are the nature and location of the image? The image is
 
  A) real, 2.5 cm tall, and 30 cm from the lens on the same side as the object.
  B) virtual, 4.0 cm tall, and 60 cm from the lens on the same side as the object.
  C) virtual, 2.0 cm tall, and 15 cm from the lens on the side opposite the object.
  D) virtual, 2.5 cm tall, and 30 cm from the lens on the side opposite the object.
  E) real, 4.0 cm tall, and 60 cm from the lens on the side opposite the object.

Question 2

The half-life of arsenic-76 is 26.7 h. What are its (a) decay constant and (b) mean life?
 
  What will be an ideal response?

[miss.ashley]

Answer to Question 1

E

Answer to Question 2

(a) 0.0260 h-1 (b) 38.5 h

[2125004343]

TYSM

[xiazhe]

Wow, this really help