An experiment was devised to investigate the effects on the temperature of a cup of coffee when cream is added at different time intervals. hot and cold water were used instead of coffee and cream. first, a container of water heated to 80°c was allowed to sit for 15 minutes. its temperature was measured at regular intervals. next, similar temperature measurements were taken for 15 minutes on a new container of heated water, but this time some cold water was added after the 2-minute reading. finally, the procedure was repeated except that for this last test, the cold water was added after the 12-minute reading. the resulting recorded temperatures were plotted on the graph shown here. 1. what question was asked in the experiment? 2. what was the hypothesis, expressed as an if-then statement? 3. what were the independent and dependent variables? 4. what was the control in the experiment? 5. there is one thing that is wrong about this graph. what is it?
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Physics, 21.06.2019 21:50
When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?
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Physics, 22.06.2019 01:00
An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75
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Physics, 22.06.2019 01:20
Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.
Answers: 3
An experiment was devised to investigate the effects on the temperature of a cup of coffee when crea...
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