A scientific blank is a proposed explanation that can be tested

Why Is it summer in the Southern Hemisphere when it is winter in the northern hemisphere

Calculate the heat flux (in W/m2) through a sheet of a metal 11-mm thick if the temperatures at the two faces are 350 and 110 ˚C. Assume steady-state heat flow and that the thermal conductivity of this metal is 53.0 W/m-K.

One way to decrease the inertia of an object is to A. decrease its acceleration. B. remove some of its mass. C. remove the force acting on it. D. change the volume of space it occupies.

Vertically polarized light with an average intensity of is incident on a polarizer whose transmission axis makes an angle of 30o with respect to the horizontal. What is the average intensity of the light that is transmitted through the polarizer?

I. A car travels at uniform velocity a distance of 100m in 4 seconds. What is the velocity of the car?

An electrical motor spins at a constant 2035 rpm. if the armature radius is 5.862 cm, what is the acceleration of the edge of the rotor?

If a car engine burns an equivalent of 20,000 joules of energy and attains a kinetic energy of 5,000 J, how much energy is dissipated in the form of heat?

If the speed of light in a vacuum is twice that of the speed of light in a given material, what is the index of refraction for that material?

In an electric motor, the rotating coil of wires wrapped around an iron core is a (n)

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? The hot water causes a chemical reaction to take place in the spoon.