A 25kg steel block rests on a horizontal steel surface. Calculate the maximum horizontal force P, that can be applied onto the block without the block sliding across the surface.

Which is not part of John Dalton's atomic theory? a. All elements are composed of atoms. b. Atoms of different elements have different masses. c. All atoms of the same element have the same mass. d. Atoms are made up of smaller particles.

Iron reacts with oxygen to produce iron oxide (rust). This reaction is represented in an equation as 4Fe + xO2 → 2Fe2O3. Identify the value of x that will balance the equation.

After walking across a carpet, a boy feels a spark between his hand and a doorknob. If the boy's hand is negatively charged just before he touches the doorknob, which particles moved from the carpet to his hand (Chose one of the answers below) A

Determination of Thermal Conductivity. In determining the thermal conductivity of an insulating material, the temperatures were measured on both sides of a flat slab of 25 mm of the material and were 318.4 and 303.2 K.

Which term describes the transfer of thermal energy from one object to another because of a difference in temperature? 1. energy 2. friction 3. heat 4. work

There are 2 charged particles, A and B. You know that particle A is positively charged. When you place particle B next to particle A, then particle B starts moving away from particle A. What does this mean for particle B?

The speed of light is now to be defined 2.99792458x10^8 m/s express the speed of light to three significant figures five significant figures seven significant figures

An element that is a very reactive gas is most likely a member of what group?

Describe the concept of orbital motion as it relates to the earth., moon and sun

Which statement about human behavior would john B. Watson support