Physics, 10.12.2019 01:31 tornadobrooks11
100points plzz me a glass rod with a silk cloth is an example of charging by
question 1 options:
conduction
induction
friction
question 2 (1 point)
rubbing a glass rod with a silk cloth will cause the rod to become more because it is losing electrons and the cloth to become more charged because it is gaining electrons.
question 2 options:
negatively; positively
positively ; neutral
positively ; negatively
neutral ; negatively
question 3 (1 point)
all matter is made up of both positive and negative charges, but we can only transfer the charges.
question 3 options:
positive
hyperactive
negative
neutral
question 4 (1 point)
charging by a method used to charge an object without actually touching the object to any other charged object.
question 4 options:
conditioning
conduction
friction
induction
question 5 (1 point)
when a charged object is brought near (without touching) a neutral object, this induces the electrons within the neutral object to move. this is an example of a temporary charge by
question 5 options:
condition
conduction
induction
friction
question 6 (1 point)
grounding allows charged objects to become neutral by electrons either flowing from the earth to the object or electrons flowing from the object to the earth through a conductor.
question 6 options:
true
false
question 7 (1 point)
when an uncharged student (standing on an insulating mat) touches a negatively charged van de graaff generator, this is an example of charging by
question 7 options:
conduction
friction
induction
condition
question 8 (1 point)
a positively charged object will be repelled by a negatively charged object because the charges are different.
question 8 options:
true
false
question 9 (1 point)
which of the following is an example of static electricity?
question 9 options:
current flowing through an outlet in your home
electrons moving from the battery through the wires to a light and back to the battery.
a build up of charges on a sock from a dryer
question 10 (1 point)
according to the image below, the like charges within the metal leaves at the bottom in the glass of an electroscope will be by each other and therefore will
question 10 options:
attracted , spread further apart
repelled , spread further apart
attracted , move closer together
repelled , move closer together
Answers: 3
Physics, 22.06.2019 10:30
In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?
Answers: 1
Physics, 22.06.2019 10:30
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
Physics, 22.06.2019 10:50
The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)
Answers: 3
Physics, 22.06.2019 12:30
An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.
Answers: 1
100points plzz me a glass rod with a silk cloth is an example of charging by
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