The reason an astronaut in an earth satellite feels weightless is that

How much energy is needed to heat 55 Kg of water from 285 K to 360 K?

What are comets made of?

Which of The following is a cost of mining aluminum from new bauxite deposits in tropical areas?

The total energy in a closed system remains the same or changes as energy changes forms

Can you think of a scenario when the kinetic and gravitational potential energy could both be zero

Microwave ovens emit microwave energy with a wavelength of 12.3 cm. What is the energy of exactly one photon of this microwave radiation?

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?

What is 18 degrees celsius in fahrenheit?

A small object moves along the x-axis with acceleration ax (t) = - (0.0320m/s3) (15.0s-t). At t = 0 the object is at x = - 14.0 m and has velocity v0x = 8.90 m/s. What is the x-coordinate of the object when t = 10.0 s?

Nitrogen and Hydrogen react to form ammonia (NH3). The reaction looks like this: Ammonia What is the ratio of nitrogen atoms to hydrogen atoms in ammonia? 1 to 2 1 to 3 2 to 1 3 to 1