Wires can be subject to aging over time, but there can be other problems that can lead to wire breaks or shorts. In older homes, wires tend to become damaged by dry rot or erode quicker. Rodents can also chew through wires and cause breakages. Loose or poorly soldered wire connections can come apart, too.
How Can You Find a Broken Wire?
To find a broken wire, you'll first need to test the device as a whole. This can be done using a digital multimeter. Multimeters are handheld tools that can take measurements of voltage, amperage, capacitance and resistance.
First, switch off the device you're testing. Unlike with other circuit tests, the multimeter can supply the power needed to conduct the test. Then, turn on your multimeter and set it to the "continuity" setting. Place the meter leads across the device's cord. Place the black end of the multimeter into the round ground port of the device. Place the red in the smaller of the two slotted ports on the device. Make sure the leads are connected to metal in order for the multimeter to work properly. If the resistance is zero, you've found the break. If the resistance isn't zero, continue searching along the cord until you get a zero reading. The zero reading is the indicator of a broken wire.
How Can A Broken Wire Be Fixed?
After using your multimeter as a wire break detector, you can go about fixing the problem. More often than not, the broken wire will need replacing entirely. You should test the new wire with your multimeter before installing it to check that it too isn't broken.
Some very minor wire breaks can be fixed with wire splices or joints. They can then be soldered and covered with electrical tape. There are a variety of different types of wire splice, depending on the types of wires you're fixing.
Answer:
the cart's speed at point B is 15.72 ft/s
Explanation:
Given the data in the question;
The car travels from point A to C in 3.00 s, its average acceleration will be;
= [ - ] / Δt
is 17.4 ft/s, is 13.2 ft/s and Δt is 3.00 s
so we substitute
= [17.4 - 13.2] / 3
= 4.2 / 3
= 1.4 ft/s²
so average acceleration of the cart between the points A and B is 1.4 ft/s²
The instantaneous value of the velocity of the cart at point B will be;
= Δv / Δt
now substitute [ - ] for Δv and t' for Δt
= [ - ] / t'
= - ( t' )
so we substitute 17.4 ft/s for , 1.20 s for t' and = 1.4 ft/s²
= 17.4 - (1.4 × 1.20)
= 17.4 - 1.68
= 15.72 ft/s
Therefore, the cart's speed at point B is 15.72 ft/s
Divide energy by time, that is, 72000/60=1200 watts.
Answer:
5.71 g/cm^3
Explanation:
Recall that density is defined as:
density = mass/volume
therefore in our casewe have:
density = 20 g / 3.5 cm^3 = 5.71 g/cm^3
Answer:
Explanation:
This problem is related to the Rayleigh Criterion, which provides the following formula to find the acuity or limit of resolution of an optic system with circular aperture (the eye in this case):
Where:
is the angle of resolution (related to the acuity)
is the wavelength of the light
is the diameter of the pupil
Solving: