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At time t=0 a positively charged particle of mass m=5.95 g and charge q=10.8 μC is injected into the region of the uniform magnetic

 

At time t=0 a positively charged particle of mass m=5.95 g and charge q=10.8 μC is injected into the region of the uniform magnetic B=B k and electric E=−E k fields with the initial velocity v=v0 i. The magnitudes of the fields: B=0.43 T, E=722 V/m, and the initial speed v0=3.42 m/s are given.

Find at what time t, the particle's speed would become equal to v(t)=4.14·v0: t =____ seconds.

 

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