2 sec
3 sec
4 sec
3.2 sec
Correct answer is D
From S = ut + ½gt2
u = 0ms-1
50 = (0 × t) + ½(10)(t2)
50 = 5.0t2
t2 =50/5
t = √10
t = 3.2sec
What type of electromagnetic radiation can be used to take photographs in the haze?
Radio waves
infrared rays
Visible light
Gamma rays
Correct answer is B
Infrared rays are easily detected by special photographic films and it can be used for taking picture in haze
Lodestone is a natural magnet, it points at
N – W when suspended freely
N–S when suspended freely
S – E when suspended freely
S–W when suspended freely
Correct answer is B
Lodestone is a natural magnet it points approximate at N – S when suspended freely
Quantities of heat Q can be measured using a container called
Thermometer
Measuring cylinder
Calorimeter
Meter rule
Correct answer is C
Calorimeter is an apparatuses used for measuring the heat (Q) generated or absorbed by change of phase (state) or other physical change
Heat transfer in the surrounding without a material medium is possible through?
Conduction
Convection
Radiation
Expansion
Correct answer is C
Conduction, convection of heat or electricity through a material medium is required but radiation requires no material medium for heat transfer