Question 4 The threshold wavelength for tungsten is 2,730 Angstrom, and the threshold wavelength for cesium oxide is 7.000 Angstrom. A particular light source
produces photoelectrons from cesium oxide but not from tungsten. Which of the following is the most reasonable value of the wavelength of the light
source?

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped