Which of the following statements explain why hot soapy w...
Which of the following statements explain why hot soapy water is more effective in cleaning oil-stained dishes?
The oil on the dishes repels the soap
soap and heat decrease the surface tension of oil
soap increases the surface tension of oil and water
Hot water increases the surface tension of oil
Correct answer is B
No explanation has been provided for this answer.
When the brakes in a car are applied, the frictional force force on the tyres is ...
The slope of the straight line displacement-time graph indicates? ...
Which expression gives magnetic flux? ...
Young’s modulus of elasticity is the ratio of stress to strain, provided the load does not exc...
What is the best method of demagnetizing a steel bar magnet? ...