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Questions in physics

[Homework Help] The magnitude of the force on the electron placed in a uniform magnetic field is

[Homework Help] The electric field strength between the plates of a simple air capacitor is equal to the voltage across the plates divided by the distance between them. When a voltage of 61.1 V is put across the plates of such a capacitor an electric field strength of [tex]$3.3 \frac{ kV }{ cm }[/tex] is measured. Write an equation that will let you calculate the distance [tex]$d$[/tex] between the plates. Your equation should contain only symbols. Be sure you define each symbol.

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] A(n) _____ is one in which some built-in asymmetry draws the excited electrons away and delivers them to an external circuit before they can relax. a. electromagnetic device b. nuclear power plant c. photovoltaic device d. conventional power plant

[Homework Help] What is the mass of a crate if a net force of 12 N gives the crate an acceleration of [tex]$0.20 m / s ^2$[/tex]? A. 2.4 kg B. 6 kg C. 12.2 kg D. 60 kg

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] A car breaks from 360 km/h to a full stop in 10 s, what is its acceleration? A. -10 m/s^2 B. -1 m/s C. 1 m/s^2 D. 10 m/s^2

[Homework Help] What is the energy of a photon that emits a light of frequency $7.21 \times 10^{14} Hz$? A. $4.78 x 10^{-19} J$ B. $2.76 x 10^{-19} J$ C. $1.09 \times 10^{-19} J$ D. $4.16 x 10^{-19} J