Recent content by ally.hady

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    Redox reactions in photographic film with silver bromide

    Chemistry: Electro chemistry help! PLEASE? Photographic film contains a thin layer of silver bromide (AgBr) Crystals. When the light hits the film. Electrons are transferred from the Br- to the Ag + ions. Dark patches of metallic silver appear on the film where the lens of the camera focused...
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    Waves question (wavelength, period, etc)

    can anyone please help me? i have a final exam tomorrow :(
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    Waves question (wavelength, period, etc)

    what about the other questions any tips?im lost
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    Waves question (wavelength, period, etc)

    so 3.00x10^8 m/s / 300,000 = wavelength?
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    Waves question (wavelength, period, etc)

    Homework Statement A transmitter sends out 1.8x10^7 waves per minute and generates a standing wave pattern. The radio waves travel at the speed of light to a receiver 20.0km away. Determine : a) the frequency in herts b) period c)wave length d) the time for one crest to travel from the...
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    Physics:series of 3 lenses calculate mag

    thankyou sir
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    Physics:series of 3 lenses calculate mag

    Diagrams i thought of it before but it takes too much time and our teacher has allowed us to use diagrams on the test coming up but he also told us its not worth it due to the time distribution for all of the questions. do you think i can do this without drawing a diagram? forexample use the...
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    Thermal physics; specific heat capacity

    gold penny lab, i remmber doing this it was fun. sorry we didint have these questions, maybe you should search for gold penny lab.
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    Physics:series of 3 lenses calculate mag

    Homework Statement An object is placed 10.0 cm from a series of 3 lenses. The first lens has focal length of 5.00 cm, the second lens has a focal length of 9.00 cm and the final lens has a focal length of 3.00 cm. the distance between each lens is 25.0 cm. Find the final position of the image...
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    Does a 500g lead mass at 150°C melt ice at -10°C?

    wow ur smart, ok i will do that
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    Does a 500g lead mass at 150°C melt ice at -10°C?

    but i don't have the specific heat capactiy on the sheet given to me so how do i find the heat?
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    Does a 500g lead mass at 150°C melt ice at -10°C?

    q=mcDeltaT Q=52kg(2100 j/kg C) (0C-(-10C)) Q= 1092 Kj thats the amount of heat needed to bring its temperature to 0 degree now where do i go from here?
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    Does a 500g lead mass at 150°C melt ice at -10°C?

    Homework Statement a 500 g lead mass is heated to 150 C and placed on a block of ice at -10 C. how much ice, if any will melt? 52 kg = block of ice Homework Equations The Attempt at a Solution i didint know where to start so i did qmcdeltaT + qmcdeltaT = 0, and i failed at it i...
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