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  1. S

    Uadel med/dent offers

    sorry to chime, BUT HOW CAN YOU NOT GET AN OFFER WITH THOSE SCORES...? i mean i knew med was competitive, but i thought getting scores like that would be enough to get you in!! :
  2. S

    Why is it current that kills? Why is AC more dangerous than DC - damage to the body?

    Re: Why is it current that kills? Why is AC more dangerous than DC - damage to the bo i understand that in AC, the shock comes back to attack you BUT to clarify, is any of this related to frequency? coz in the textbook it mentions AC as 50HZ per second (no mention of DC??) that means the DC...
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    Physics calculation question

    SORRY! this too. in particular (d) , since i keep getting an impulse in the opposite direction A police officer travelling East at 126 kmhr-1 in a 1000 kg police car is following close behind a (1300 kg + 200 kg vase) delivery truck, which is also travelling East. Suddenly the delivery...
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    Physics calculation question

    Bored at the beach, a physics student resorts to counting water waves. He sits on a pier and count the water waves washing by their feet. There are 30 full waves passing his feet every minute. Looking along the pier which is 9.0 m long, he can see 4 wave crests at a time along the side of...
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    Could someone clarify the answers to these physics problems?

    (b, c and d confuse me ) i)The instruments attached to a weather balloon have a mass of 5kg. The balloon is released and exerts an upward force of 98N on the instruments. a) what is the acceleration of the instruments? b)after the balloon has accelerated for ten seconds the attachment...
  6. S

    why is NH4NO3 not an empirical formula?

    Doesn't it fit the definition despite being made of polyatomic ions........
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