The method to increase friction is by i)polishing
ii)increasing roughness
iii)streamlining
iv)lubricanation

if u say right ans i will send. more point. if it wrong i will report

Phase changes are chemical changes. true or false

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

Which of the following describes how a microwave heats food