A) a piece of wire
Explanation:
Radhika's mother is simply replacing piece of wire.
A fuse is made up of a thin strip of wire that melts when there is an over current.
- A fuse is electrical safety device in circuit that protects appliances from over current.
- The wire in a fuse has a high resistance and low melting point.
- When current is high, the resistance of the wire causes it to melt and break the circuit.
- In this way, appliances are protected from the harmful effect of the surge in voltage.
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At STP, 1 mole of an ideal gas occupies a volume of about 22.4 L. So if <em>n</em> is the number of moles of this gas, then
<em>n</em> / (19.2 L) = (1 mole) / (22.4 L) ==> <em>n</em> = (19.2 L•mole) / (22.4 L) ≈ 0.857 mol
If the sample has a mass of 12.0 g, then its molecular weight is
(12.0 g) / <em>n</em> ≈ 14.0 g/mol
Answer:
The number of turns is 64.
Explanation:
Given that,
Magnetic field = 0.050 T
Area of coil = 100 cm²
Frequency = 60 Hz
Output voltage emf= 12 V
We need to calculate the number of turns
Using formula of induced emf
Hence, The number of turns is 64.
Macro viruses – These are the largest of the three virus types. They use built-in programming scripts in such applications as Microsoft Excel and Microsoft Word to automate the tasks. When an unsuspecting user opens a document infected by a macro virus, they give it the green light to make copies of itself in other documents and multiply.
Boot record infectors – These viruses are known also as boot viruses or system viruses. They attack programs stored on bootable floppy or hard disks. Every time a user boots up, the virus-infected code automatically runs as well. This gives hackers full control of an entire system and lets them do exactly what they want with it. Boot record infectors can be spread from one infected bootable disk to another.
File infectors – These viruses target .EXE or .COM files and changes them. File infectors get activated every time users run a compromised program. What makes this type of virus especially insidious is that it can simply stay inactive in the memory until it gets a cue to infect other program files. These viruses can get transmitted over networks, the Internet or by using infected disks.
The heat of fusion is the amount of energy required to change the state of one mole of substance from solid to liquid at constant temperature. Therefore, in order to determine the energy needed by a given mass of substance, we must first convert the mass into moles by using:
Moles = mass / Mr
Moles = 5.67 / 71.84
Moles = 0.079 mol
Energy = latent heat of fusion * moles
Energy = 32.2 * 0.079
Energy = 2.544 kJ = 2,544 J