A submarine send out a pulse of ultrasound to check how close it is to the seabed the reflected waves are detected 0.2 seconds later work out the total distance travelled by the detected wave is the speed of ultrasound is in water is 1500 M/S

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong

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.