Energy is lost when machines don't work right

How many atoms are in a sample of 1.83 moles of potassium (K) atoms? A) 3.04 * 10-24 atoms K B) 3.29 * 1023 atoms K C) 1.10 * 1024 atoms K D) 6.02 * 1023 atoms K

2. A body moves with a uniform speed of 1.5 ms-1 for 20 seconds. Find the distance covered by it.

3. How does the vapor pressure of water at 10°C compare with its vapor pressure at 50°C? The vapor pressure of water is lower at 50°C than it is at 10°C.

Radiation is an example of a transverse wave t or f

In a energy transformation, the total amount of energy is "increased" True or false?

What is the weight of an with a mass of 32kg

The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. A beam of white light in this glass strikes the glass-air interface at a 25.50∘ angle of incidence and refracts out into the air.

The locations of the major pressure and wind systems on the earth:

Which statements correctly describe the properties of heat? Select all that apply. Heat is an essential component of life on Earth. Heat is energy that flows from one object to another. Heat flows from a hotter object to a colder one.

A book is sitting on a table at rest. Which of the following best describes the forces acting on the book? A.