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Svetradugi [14.3K]
3 years ago
6

Vì sao các bộ đốt nóng của bếp điện , nồi cơm điện ... thường làm từ những hợp kim nikêlin hoặc constantan mà không làm bằng dây

đồng hoặc dây nhôm
Physics
1 answer:
Ilia_Sergeevich [38]3 years ago
6 0

Answer:

hbsbdd

Explanation:

hsbbs jsbbs jhsb jzb. sjsb vsjzzbs vsjbs hhsvd xbvd d jjxbdjdb kxbrbdjrb jxbd

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Find the linear function C Equals=​f(F) that gives the reading on the Celsius temperature scale corresponding to a reading on th
Juli2301 [7.4K]

Answer:

a. C(F) = (5/9).F - (160/9)

b. They both readings are equal at C = F = - 40

Explanation:

They are telling us that we are looking for a linear function

If C(F) = a.F + b is the linear function, we use the data to find a and b

C(32) = a.32 + b

0 = a.32 + b

b = - (a.32)     (1)

And then

C(212) = a.212 + b

100 = a.212 + b    (2)

replacing (1) in (2) we obtain

100 = a.212 +  [-(a.32)]

100 = a.212 - a.32

100 = 180.a

a = 100/180

a = 5/9

If a = 5/9 then b = -(a.32)

b = - (5/9).32

b = - (160/9) and the linear function is

C(F) = (5/9).F - (160/9)

For b. they are asking us for a X reading. We must equalize C and F

X = (5/9).X - (160/9)

(4/9).X = - (160/9)

X = -40

C = F at temperature X = - 40

6 0
3 years ago
Your grandfather clock's pendulum has a length of 0.9930 m. if the clock gains 80 seconds per day, should you increase or decrea
salantis [7]
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6 0
3 years ago
Find the frequency of a spring block system if it is doing 4 oscillation in 100s
Paha777 [63]

Answer:

.004 Hz

Explanation:

Frequeny is cycles per second. An oscillation is 1 cycle

F=cycles/sec

4/100

=0.004Hz (Hz- Hertz=1 cycle/sec)

3 0
3 years ago
Why must we be careful when measuring current with a DMM?
Lemur [1.5K]

Answer:

DMM should be placed in the series combination with the circuit.

Explanation:

DMM is the digital multi meter. It can measure the voltage, current and resistance at a time.

  • While measuring the current with the DMM you must be ensure that the DMM should be connected with the circuit in series combination. So that it will give the resultant current accurately.
  • While measuring the voltage the observer should check the open probes.
4 0
3 years ago
• What value is used to identify each element in the periodic table?​
bearhunter [10]

Answer:

protons

Explanation:

5 0
3 years ago
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