A hot iron ball is dropped into 200.0 g of cool water. The water temperature increases by 2.0 C and the temperature of the ball decreases by 18.6 C. What is the mass of the ball? waters specific heat is 4184 (J/kg•C)

What is the purpose of the universal gravitation constant in newtons law of universal gravitation?

Which of the following scientists inferred that an atom positive charge must be clustered

Loamy soil is ideal for gardening because it contains Select one: a. mostly silt with very little clay or sand. b. mostly clay with very little silt or sand. c. mostly sand with very little clay or silt. d. roughly equal parts sand, clay, and silt.

When Plutonium-239 undergoes alpha decay, it becomes A) curium-241 + an alpha particle B) uranium-235 + an alpha particle C) neptunium-237 + and alpha particle D) plutonium-237 + and alpha particle

Robotic spacecraft have different levels of complexity, which contributes to overall cost. Which of the following types of missions are likely to be the cheapest?

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy