What is the change in internal energy if 60 j of heat are added to a system and the system does 40 j of work on its surroundings? use u = q - w.

What kind of energy source transforms heat energy from the Earth into mechanical and electrical energy? a. Geothermal c. Solar b. Hydro-electric d. Turbine

Which causes the production of vitamin D in humans? A. ultraviolet rays B. radio waves C. gamma rays D. X-rays

Use the drop-down menus to complete each statement. Assuming a constant force, if the mass of an object increases, the acceleration of the object will Assuming a constant force, if the mass of an object decreases, the acceleration of the object will

You cant see the cells in your body because most of them are very small true or false?

a truck uses a big engine for the acceleration while a car uses a smaller engine. the bicycle rider uses the force of his own. why does each vehicle require a different amount of force to accelerate?

The diagram below shows the process of distillation of saltwater into pure water. Where is the pure water in the diagram? a. A b. B c. C d. D

In what ways, would understanding the body positions, directions, and planes assist you with tasks related to the integumentary, skeletal/muscular, and digestive systems

Concave & convex lens of same mass & radii rotate about an axis passing through their centre & perpendicular to the plane which one will have greater mnment of inertia

Which of the following statements is true? A. Both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction. B. Nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. C.

A star may form a black hole once it cannot?