What type of wave doesn't require a medium?

What's an impure potassium carbonate

The specific heat capacity of methane gas is 2.20 j/g-k. How many joules of heat are needed to raise the temperature of 5.00 g of methane from 36.0°c to 75.0°c?

What properties of Pluto might make scientists think that it is a Kuiper Belt Object?

My trip to work is 120 miles. if i go 8 mph faster than my usual speed, i'll get to work 30 minutes earlier. how long does my trip take, in hours, if i go my usual speed?

A 1-ton shark swims to the right toward a beach. In which direction is the reaction force to the shark's weight? A. up B. left C. right D. down

Define and describe a mixture using examples.

Which have a positive charge? neutrons atoms protons electrons

Now that we know the velocity of the cart before the collision is 1.80m/s, let's use this to determine the linear momentum and kinetic energy of the disk-cart system before the collision. The mass of the cart is 23.5kg. The mass of the disk is 11.

A circuit is built based on the circuit diagram shown. A diagram of a closed circuit with a power source on the left labeled 60 V. There are 3 resistors in parallel, separate paths, connected to it labeled 40 Ohms, 50 Ohms and 30 Ohms.

After harvesting their main crops, such as corn and wheat, many farmers plant a second crop called a cover crop. This cover crop grows during the fall and winter and is then plowed over in the spring. What is the main purpose of a cover crop? A.