Physics Answers

Calculate the maximum energy and the speed

of the emitted electrons when sodium is

illuminated by a radiation of wavelength

150nm. What is the least frequency of radiation

(threshold frequency) for which electrons are

emitted?

(Take work function of sodium as 2.0eV).

Given that me= 9.109 x 10-31kg,

mn= 1.675 x 10-27kg, and

mp= 1.672 x 10-27kg

A thermometer which was not accurately calibrated indicates -0.5°c at the lower fixed point, and the 106°c at the upper fixed point. What temperature does the thermometer register when the temperature is 60°c.

Find the value of energy of a wave with a frequency of 8 Hz. Given: h = 6.63x1034 J f= 8Hz or 8/s E=?

A superman is sitting on a tree 98m right with a baby he has rescued from the claws of a tiger. Unfortunately the child slips and fall with an initial velocity of 0ms^–². Superman realized what was happening 2 seconds later and flow to catch the child at a speed of 39.2ms^–¹. Calculate

(1) the time superman will fly before catching the child.

(2) the distance superman will fly before catching the child.

the distance moved by a body at the end of t1=3s and t2=5s are 126m and 250m respectively. what is the initial velocity of the body.

the distance moved by a body at the end of t1=3s and t2=5s are 126m and 250m respectively. what is the initial velocity of the body.

Missing dimouter, the former platoon Oliver of the rungling brothers eishesy had a kinetic energy is 12000 just primer to hitting the bucket of water. Ik Missy’s mass is 40kg, then what is her speed

A solenoid has 2000 turns on its 40cm length. What is the magnetic field intensity at its centre if it carries a current of 5A

If you are to plot a graph of h(cm) on y axis against T on the x axis, what's the best scale to use?

a car start from rest after 5 sec and accelerate uniformly for 10 sec before attaining a speed of 20 m/s. if it maintain this speed for the next 5 sec : draw a sketch graph to describe the journey ,use the sketch diagram to determine the uniform of acceleration. the total distance covered ,the average velocity.