when we touch a steel rod and a paper simultaneously we feel that the rod is comparatively colder .why?
A roller coaster car rapidly picks up speed as it rolls down a hlope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is the car’s acceleration?
You have decided to select a new car by using the scientific method. how would you proceed? Please answer!!!
Find the density of an unknown liquid in a beaker. The empty beaker's mass is 165 grams. With the unknown liquid inside the beaker, the total mass is 309 grams. The volume of the unknown liquid is 125mL. Is the liquid pure water? Explain your answer.
15cm3 block of gold weighs 2.8N it is carefully submerged in a tank of mercury. one cm3 of mercury weight 0.!3n a will the mercury be displaced by the gold?
What if a wave reaches a type of matter it cannot pass through? Does it just stop moving? If not, where does it go?
