Why is there a danger of explosion in places like coal mines where there are large quantities powdered, combustile material

Which is a drawback of agricultural technology? A. Better communication B. Prevents disease C. Water pollution D. Kills bugs

What does buoyancy depend on? A. the density of the object and the density of the fluid B. atmospheric pressure and the density of the object C. The density of the object and the force of gravity D.

Inside a certain house the temperature is 72F. Your little sister leaves the frint door open in the middle of winter, outside it is - 20F. Which way will thermal energy be transferred, into or out of the house?

Consider four objects, each having the same mass and the same radius: 1. a solid sphere 2. a hollow sphere 3. a flat disk in the x, y plane 4.

How much heat in joules is required to melt an ice cube with a mass of 18.6 g at 0 °C? The Lf for water is 333 J/g.

What is a Rift Valley?

Double the resistance of the resistor by changing it from 10 Ω to 20 Ω. What happens to the current flowing through the circuit?

Who would most likely be required to work with sodium hydroxide? A: a plumber B: a gardener C: a bricklayer D: a mechanic

A roller coaster is entering a vertical loop which has a radius of 25.0 m. If the coaster is traveling at 45.0 m/s as it enters the loop, how much is the centripetal force that you experience? (Assume your mass to be 75.

Which best describes tropical continental climate during the summer? A. clear, dry weather, B. cloudy, wet weather, C. cold, dry weather, D. hot, dry weather