An object has weight of 399 newtons on the surface of Venus. The acceleration due to gravity on venus is 8.87 meters per second squared. What is the mass of the object? 0.022kg
81.4 kg
41.0 kg
45.0 kg

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?