# A certain rifle bullet has a mass of 7.17 g. What is the de Broglie wavelength of the bullet traveling at 790.6 meters per second?

Jul 30, 2017

$7.45 \cdot {10}^{-} 40$ m

#### Explanation:

 m = 7.17 g =717 * 10^5 kg

$v = 790.6 m \cdot {s}^{-} 1$

$h = 6.63 \cdot {10}^{-} 34 J \cdot {s}^{-} 1$

$\lambda = \frac{h}{m v}$
$\Rightarrow \lambda = \frac{6.63 \cdot {10}^{-} 34}{717 \cdot {10}^{5} \cdot 790.6}$

$\Rightarrow \lambda = 7.45 \cdot {10}^{-} 40 m$