Physics, 03.03.2021 02:00, mustafajibawi1

How do mechanical and electromagnetic waves differ?

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•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

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Physics, 21.06.2019 22:30, christson805

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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Physics, 22.06.2019 10:00, issaaamiaaa15

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

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Physics, 22.06.2019 16:50, justkevin1231

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.