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

If charge is destroyed, it is a violation of the law of conservation of

Identifying the Functions of Parts of the Ear Which part of the ear changes sound to a signal that the brain can understand? Which part of the ear carries the signal to the brain?

A transformer is a device that has a primary and secondary coil and is used to change the voltage of electric current. True or False

Rank the following in terms of increasing pressure: a. A 10 kg object distributed on a square surface with dimensions 10 cm by 10 cmB. A 20 kg object distributed on a square surface with dimensions 10 cm by 10 cm c.

True or False: Amplitude can increase or decrease wavelength A. False, frequency can increase or decrease wavelength B. True, amplitude can increase or decrease wavelength C. False, crests can increase or decrease wavelength Music on Lenovo

What would be an example of chemical change that took a long time to occur

What are elements made of?

The moon has a weaker gravitational force than earth. Sofia weighs 50 lbs. on earth. How much will she weigh on the moon? exactly 50 lbs. less then 50 lbs. more than 50 lbs.

If the speed of an object triples how does this affect its kinetic energy

What is currently the most supported theory about the future of the universe A.) the universe could remain exactly as it is today B.) the universe may continue to expand C.) stars could burn out, causing the universe to become dark and cold D.