How much total kinetic energy will an electron-positron pair have if produced by a 2.60 mev photon? use the following joules-to-electron-volts conversion 1ev = 1.602 × 10-19 j. the rest mass of an electron is 9.11 × 10 − 31 9.11 × 10 − 31 kg

heat the gas and measure the pressure

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

a skateboard rolling across the street - apex

inverse v=i*r

nice nice