MCAT Physics Practice test 3 & answer key

1)if the quntum number $\ell$=4 how many $m_{\ell}$ exist ?

A.3
B.4
C.7
D.9

2)which particule has mass but not charge ?

A. electron
B. photon
C. proton
D. neutron

3)the magnetic field of very long,straight wire is ?

A.$ B=2\mu_{0}i/\pi r$
B.$ B=\mu_{0}i/4\pi r$
C.$ B=\mu_{0}i/2\pi r$
D.$ B=\mu_{0}i/\pi r$

4)one ball has a density of 0.55 $g/cm^{3}$ ,what fraction of the ball floats below the water?

 A. 15%
 B. 45%
 C. 50%
 D. 55%

5) A object with mass 20 kg travel at speed 1 km/s ,find kinetic energy?

  A. 10 j
  B. 20 j
  C. 10 kj
  D. 20 kj

6)what is the weight of mass m=100 g
 A.0.1 N
 B. 1 N
 C. 2 N
 D. 10 N

Answer Key

1.D
2.D
3.B
4.D
5.D
6.B