In a typical lightning strike, 2.9 c flows from cloud to ground in 0.18 ms. what is the current during the strike?

Conductors have ___ resistance.

The reaction shown below is used in the production of steel. It is an exothermic reaction. An engineer thinks that by finding the correct catalyst, he can reduce the amount of energy released by the reaction.

Term Definition Match the correct term to the right definition Elliptical galaxy A) Forms a perfect sphere or an ellipse and is flattened to some degree Irregular galaxy B) Has a large flattened core Lens galaxy C) Does not have a distinct regular

An astronaut throws a rock horizontally on the moon with a velocity of 7 m/s. Assuming no air resistance, what will be the final velocity of the object in the x direction if the moon is about 1/100th the mass ofEarth?

A 0.0220 kg bullet moving horizontally at 400 m/s embeds itself into an initially stationary 0.500 kg block. (a) What is their velocity just after the collision? (b) The bullet-embedded block slides 8.0 m on a horizontal surface with a 0.

Which of the following processes is NOT a chemical change? A burning candles B cooking an egg C grilling a steak D mowing grass

In the diagrams, the solid green line represents Earth's rotational axis and the dashed red line represents the magnetic field axis. Which diagram accurately shows Earth's magnetic field?

In order for natural selection to occur, Charles Darwin stated we must begin with a population of organisms that has genetic A) competition. B) engineering. C) reproduction. D) variation.

How fast must a 6 kg cat run to have kinetic energy of 150 j?

Alleles are variations of genes. How are they expressed? A. repetitive or creative B. major or minor C. temporary or permanent D. dominant or recessive