A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
A. Bx is positive.
B. Bz is positive.
C. By is negative.
D. By is positive.
E. Bx is negative.
Answer: A
You might also like to view...
If the temperature of an ideal gas is increased from 20°C to 40°C, by what percent does the speed of the molecules increase?
A) 3% B) 30% C) 70% D) 100%
How do x-ray measurements help us measure the amount of dark matter in galaxy clusters?
A) The gravity of dark matter causes intracluster gas to be heated to very high temperatures, and the higher the temperature, the stronger the x-ray emission we will detect from the gas. B) Dark matter absorbs x-rays, so we can map the dark matter distribution by looking for absorption lines in x-ray spectra. C) Collisions between dark matter particles emit x-rays, allowing us to map dark matter with x-ray images.
In the two-dimensional elastic collision of a particle with a stationary particle that has the same mass, the trajectories of the two particles after the collision are at right angles to each other. Explain why this should be so
What will be an ideal response?
Shepherd satellites are defined as
A) satellites in the coma of a comet. B) moons that confine a narrow ring. C) a type of moon that orbits another moon. D) moons that follow the exact orbit of another, larger, moon. E) moons that orbit inside the system of rings.