Matter composed in such a way that all samples of it have a ...

[chandani]

Matter composed in such a way that all samples of
  it have a fixed composition and identical properties
  is classified as
   a) a pure substance.
   b) a mixture.
   c) an allotrope.
   d) a saturated solution.

Question 2

A pendulum consists of a 2.0-kg block hanging on a 1.5-m length string. A 10-g bullet moving with a horizontal velocity of 900 m/s strikes, passes through, and emerges from the block (initially at rest) with a horizontal velocity of 300 m/s. To what maximum height above its initial position will the block swing?
 a. 32 cm
  b. 38 cm
  c. 46 cm
  d. 27 cm
  e. 9 cm

[bhavsar]

Answer to Question 1

a

Answer to Question 2

c

[chandani]

Excellent

[nguyenhoanhat]

Thanks for the timely response, appreciate it