Which reasons explain why a theory would be changed or replaced

How does friction work

In winter why do water tanks start freezing from surface and not from bottom

In a concrete mixer, cement, gravel, and water are mixed by tumbling action in a slowly rotating drum. if the drum spins too fast the ingredients stick to the drum wall instead of mixing. assume that the drum of a mixer has radius r = 0.5 m r=0.

When passing another vehicle you are allowed to exceed the speed limit by?

Commander Shepard, an N7 spectre for Earth, weighs 799 N on the Earth's surface. When she lands on Noveria, a distant planet in our galaxy, she weighs 356 N. What is the acceleration of gravity on Noveria in m/s2? Round to one decimal place.

The specific heat capacity of lead is 0.13 J/g-°C. How much heat (in J) is required to raise the temperature of of 91 g of lead from 22°C to 37°C?

What are some potential impacts to organisms during a global warming event?

There are 1000 g in every kilogram of a box has a mass of 483 g what is the mass of the box in kilogram

According to the map, which of the following cities had both a military and a POW camp nearby?

What does uniformitarianism tell us about processes at work on Earth's surface today?