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MAVERICK [17]
3 years ago
12

A 6V radio with a current of 2A is turned on for 5 minutes. Calculate the energy transferred in joules

Physics
1 answer:
iogann1982 [59]3 years ago
7 0

Answer:

R=V/I=6/2=3ohm

time =5minutes =5*60=300seconds

I=2A

Heat =I^2Rt=(2)^2*3*300=4*900=3600J

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What is the wavelength of an fm radio signal that has a frequency of 91.7 mhz?
Digiron [165]

Answer:

The wavelength of the radio wave will be 3.271 m

Explanation:

We have given frequency of the radio signal f=91.7MhZ=91.7\times 10^6Hz

Speed of the light c=3\times 10^8m/sec

We have to find the wavelength of the radio signal

We know that wavelength is given by \lambda =\frac{c}{f}=\frac{3\times 10^8}{91.7\times 10^6}=3.271m

So the wavelength of the radio wave will be 3.271 m

3 0
3 years ago
The image above shows a block pulled across a table. The spring scale which measures in Newtons, reads the force resisting the m
insens350 [35]
The correct answer is D. friction force
6 0
3 years ago
Read 2 more answers
4. A force of 5 N gives a mass m,, an acceleration of 10 m's, and a mass
Art [367]

Answer:

For mass m  1  newton 2nd law

F=m  1  a  1

​5=m  1  ×10

m  1  =  2 1 kg

For mass m  2

​F=m  2  a 2

​5=m  2 ×20

m  2 =  4 1  kg

if tied together  

Total mass =m  1  +m  2  =  1/2 +1/4=3/4kg  

Now

F=M T  Q T

 a  T    =  5/m T =  5×4/3  =  3 /20m/s^2

Explanation:

8 0
3 years ago
Hooke's law describes an ideal spring. Many real springs are better described by the restoring force (F Sp ) s =−kΔs−q(Δs) 3 (p)
Montano1993 [528]

Answer with Explanation:

We are given that

Restoring force,(FS_p)s=-k\Delta s-q(\Delta s)^3

k=350N/m

q=750 N/m^3

We have to find the work must you do to compress this spring 15 cm.

\Delta s=15 cm=0.15 m

Using 1 m=100 cm

Work done=\int_{0}^{0.15}-Fd(\Delta s)

W=-\int_{0}^{0.15}(-k\Delta s-q(\Delta s)^3))d(\Delta s)

W=k[\frac{(\Delta s)^2}{2}]^{0.15}_{0}+q[\frac{(\Delta s)^4}{4}]^{0.15}_{0}

W=0.01125k+0.000127q=0.01125\times 350+0.000127\times 750

W=4.033 J

Ideal spring work=0.5k(\Delta s)^2=0.5\times 350\times (0.15)^2=3.938 J

Percentage increase in work=\frac{4.033-3.938}{3.928}\times 100=2.4%

6 0
4 years ago
In the periodic, the elements are in order based on
Helga [31]

Answer: informative array

Explanation:

"The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods."

https://www.livescience.com/25300-periodic-table.html

5 0
4 years ago
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