An electron traveling toward the magnetic north with speed 400 km/s enters a region where Earth's $\vec { B }$ field has the magnitude 5.0 × 10^-5 T and is directed downward at 45° below horizontal.What magnitude magnetic force is exerted on the electron? (e = 1.60 × 10^-19C)

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The Answer of An electron traveling toward the magnetic north with speed 400 km/s enters a region where Earth's $\vec { B }$ field has the magnitude 5.0 × 10^-5 T and is directed downward at 45° below horizontal.What magnitude magnetic force is exerted on the electron? (e = 1.60 × 10^-19C)

An Electron Traveling Toward the Magnetic North with Speed 400 B⃗\vec { B }B

An Electron Traveling Toward the Magnetic North with Speed 400 $\vec { B }$