Ancient physicists tried to determine the orbits of the planets. Every night they carefully tracked the location of the planets and stars they observed. What kind of investigation were these physicists conducting?

A parallel-plate capacitor connected to a battery becomes fully charged. After the capacitor from the battery is disconnected, the separation between the plates of the capacitor is doubled in such a way that no charge leaks off.

Any object that is given any initial velocity and which follows a path due to gravitational force acting on it and by the frictional resistance of the atmosphere is called?

What do psychologists investigate with a visual cliff? subliminal messages motion parallax depth perception none of the above

A dolphin emits ultrasound of 100kHz and uses the timings of reflection to determine the position of objects in the water. What is the wavelengths of this ultrasound? Note the speed of sound in water is 1480m/s.

2. Products and reactants in a balanced chemical reaction have the same number of of each element. O atoms O molecules

What was the change in internal energy (chemical energy plus thermal energy) of the person pulling the block?

One of the longer sides of a kite is 39 feet. one of the shorter sides is 25 feet. half the length of the shorter diagonal is 15 feet. what is the area of the kite?

As the width of an opening in a barrier increases, how will the amount of diffraction of the planar waves change as they pass through the opening? A. It will increase. B. It will decrease. C. It will remain the same.

Two forces whose resultant is 100N, are perpendicular to each other. if one of them makes an angle of 60° with the resultant, calculate it's magnitude Calculate the absolute pressure of an ocean depth of 1200atm.

So this is a very logical question but, where did any of us come from? Do note that I am an atheist and I do not believe in God. Why well if God was real then who were his paretns. You cannot tell me that there is just a God with no parents.