A proton traveling at 23.0° with respect to the di-rection of a magnetic field of strength 2.60 mT experiences a mag-netic force of 6.50 $ 10 %17 N. Calculate (a) the proton’s speed and(b) its kinetic energy in electron-volts

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.

How many electrons in an atom could have these sets of quantum numbers? =3n=3 electronselectrons =4,ℓ=2n=4,ℓ=2 electronselectrons =6,ℓ=ℓ=−1n=6,ℓ=2,mℓ=−1