In the old west, a marshal riding on a train traveling 35.0 m/s sees a duel between two men standing on the earth 55.0 m apart parallel to the train. the marshal's instruments indicate that in his reference frame the two men fired simultaneously. (a) which of the two men, the first one the train passes (a) or the second one (b) should be arrested for firing the first shot? that is, in the gunfighter's frame of reference, who fired first? (b) how much earlier did he fire? (c) who was struck first?

Give your knowledge of these things in your paper, you will compare and contrast analog and digital signals to determine which is more reliable for encoding and transmitting information. you’ll compare these features: signal shape numerical values for signal measurements amount of data that can be transmitted energy requirements privacy and security (ability of the signal to be encoded in a secret code) clarity of signal in the space provided, write down what you already know about any of these features. if you’re not sure, write down questions you might have about the features.

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

What is a subatomic particle with a negative charge and very little mass?