An electron is placed in a constant electric field of 4.5 × 104 N/C
(a) What is the force on the electron?
(b) If the electron is released from rest, what is its speed after 3.0 ps?
(a) 7.2 × 10-15 N opposite the field
(b) 24. km/s
You might also like to view...
An 8.00-? resistor is connected to a battery with internal resistance of 0.200 ?. If the terminal voltage across the battery is 9.00 V, what is the battery's emf?
a. 8.78 ? b. 9.23 ? c. 0.225 ? d. 0.178 ?
An ac generator consists of a coil with 40 turns of wire, each with an area of 0.06 m2
The coil rotates in a uniform magnetic field B = 0.4 T at a constant frequency of 55Hz. What is the maximum induced emf? A) 110 V B) 625 V C) 200 V D) 421 V E) 332 V
After a massive-star supernova, what is left behind?
A) always a white dwarf B) always a neutron star C) always a black hole D) either a white dwarf or a neutron star E) ether a neutron star or a black hole
An unstable particle is moving at a speed of 2.6 × 108 m/s relative to a laboratory. Its lifetime is measured by a stationary observer in the laboratory to be 4.7 × 10-6 seconds
What is the lifetime of the particle, measured in the rest frame of the particle? (c = 3.00 × 108 m/s)