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pogonyaev
4 years ago
10

There are three ways to give an object a static charge. They are friction, conduction and induction. Two pieces of cellophane ta

pe are stuck to a lab table. Each piece is quickly ripped off the table. A student attempts to bring the two pieces of tape together, but the tape is attracted to her hand. So, the tape clings to her hand. Formulate a possible explanation for this. A) The adhesive on the tape sticks to the student's hand. B) The charges are conducted onto the student's hand and then the tape is attracted to her hand. C) The tape is charged by friction and her hand has an induced opposite charge. They therefore attract. D) The tape is charged by friction and the human body is naturally charged. So, the tape is attracted to her hand. Eliminate
Physics
2 answers:
Novay_Z [31]4 years ago
8 0

The tape is charged by friction and her hand has an induced opposite charge. They therefore attract.

Helen [10]4 years ago
3 0

Answer:

c) The tape is charged by friction and her hand has an induced opposite charge. They therefore attract.

this is the answer

Explanation:

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A 50-ohm resistor in a 0.5 Amp circuit produces how much voltage drop?​
ahrayia [7]

25 volts

Explanation:

Use Ohm's law to find the potential drop:

V = IR

= (0.5 A)(50 ohms)

= 25 volts

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Maverick and goose are flying a training mission in their F-14. They are flying at an altitude of 1500 m and are traveling at 68
lions [1.4K]

Answer:

The bomb will remain in air for <u>17.5 s</u> before hitting the ground.

Explanation:

Given:

Initial vertical height is, y_0=1500\ m

Initial horizontal velocity is, u_x=688\ m/s

Initial vertical velocity is, u_y=0(\textrm{Horizontal velocity only initially)}

Let the time taken by the bomb to reach the ground be 't'.

So, consider the equation of motion of the bomb in the vertical direction.

The displacement of the bomb vertically is S=y-y_0=0-1500=-1500\ m

Acceleration in the vertical direction is due to gravity, g=-9.8\ m/s^2

Therefore, the displacement of the bomb is given as:

S=u_yt+\frac{1}{2}gt^2\\-1500=0-\frac{1}{2}(9.8)(t^2)\\1500=4.9t^2\\t^2=\frac{1500}{4.9}\\t=\sqrt{\frac{1500}{4.9}}=17.5\ s

So, the bomb will remain in air for 17.5 s before hitting the ground.

5 0
3 years ago
Look at the Sankey diagram for a filament light bulb below. If the bulb is used in a desk lamp, what is the efficiency of the bu
guapka [62]

Answer:

The question does not state how the answer is to be entered. I would use 10% because that is most common.

Explanation:

You are using 300 J of energy to get 30 J of light energy. The fact that you can account for the left over energy is not relevant.

Efficiency = Work Out / Work In

Efficiency = 30 J / 300 J  = 0.1

If you need this as a %, you can multiply by 100

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6 0
3 years ago
A quantity that has only one magnitude
Len [333]

Answer:

scalar quantity

Explanation:

Vector quantities have two characteristics, a magnitude and a direction. Scalar quantities have only a magnitude.

3 0
4 years ago
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