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2 years ago

How many hours should I charge a 4.8 volt 600mah battery(it is urgent)

Engineering

1 answer:

miskamm [114]2 years ago

6 0

Answer:

For example, a 600maH pack should be charged at 600/10 or 60ma. This is known as the overnight rate. Although ideally, a pack should be fully charged in 10 hours, due to inefficiency, it will probably take between 12 and 15 hours.

Explanation:

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Dean is buying a home for $170,000. The mortgage company he decided to use to finance the home requires a 10% down payment. What

ANTONII [103]

They answer is 3. $17,00

8 0

3 years ago

Read 2 more answers

What should be a concern as a weldment becomes larger as more parts are added?

Ludmilka [50]

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7 0

3 years ago

The constant A in Equation 17.2 is 12π4 R/5(θD) 3 where R is the gas constant and θD is the Debye temperature (K). Estimate θD f

kirill115 [55]

Answer:

The Debye temperature for aluminum is 375.2361 K

Explanation:

Molecular weight of aluminum=26.98 g/mol

T=15 K

The mathematical equation for the specific heat and the absolute temperature is:

$C_{v} =AT^{3}$

Substituting in the expression of the question:

$C_{v} =(\frac{12\pi ^{4}R }{5\theta _{D}^{3} } )T^{3}$

$\theta _{D} =(\frac{12\pi ^{4}RT^{3} }{5C_{v} } ) ^{1/3}$

Here

$C_{v} =4.6\frac{J}{kg-K} *\frac{1kg}{1000g} *\frac{26.98g}{1mol} =0.1241J/mol-K$

Replacing:

$\theta _{D} =(\frac{12\pi ^{4}*8.31*15^{3} }{5*0.1241} )^{1/3} =375.2361K$

3 0

3 years ago

List all information for each order item. Include an item total, which can be calculated by multiplying the Quantity and Paid ea

Zigmanuir [339]

Answer:

#include<iostream>

Using namespace std;

int main()

{

int n, qty;

double price, amount;

cout<<"Number of items ";

cin>>n;

cout<<"ITEM<<"\t"<<"QUANTITY"<<"\t"<<"PRICE"<<"\t"<<"ITEM TOTAL";

for(int i= 1; I<= n; i++)

{

cin>>qty;

cin>>price;

amount = qty * price;

cout<<i<<"\t "<<qty<<"\t"<<price<<"\t"<<amount;

}

Explanation

The above program is written in C++ programming language

5 variables are declared and used in the program

n is declared as an integer to represent the total number of items

qty is declared as integer to represent the total quantity of each item

price is declared as double to represent the amount of each individual item

amount is declared as double to represent the total amount of an item; it is gotten by qty * price

i is declared as integer to iterated between each items

The amount of each item is calculated within the iteration and also printed immediately

3 0

3 years ago

Refrigerant 134a enters an air conditioner compressor at 4 bar, 208C, and is compressed at steady state to 12 bar, 808C. The vol

SCORPION-xisa [38]

Answer:

heat transfer rate is -15.71 kW

Explanation:

given data

Initial pressure = 4 bar

Final pressure = 12 bar

volumetric flow rate = 4 m³ / min

work input to the compressor = 60 kJ per kg

solution

we use here super hated table for 4 bar and 20 degree temperature and 12 bar and 80 degree is

h1 = 262.96 kJ/kg

v1 = 0.05397 m³/kg

h2 = 310.24 kJ/kg

and here mass balance equation will be

m1 = m2

and mass flow equation is express as

m1 = $\frac{A1\times V1}{v1}$ .......................1

m1 = $\frac{4\times \frac{1}{60}}{0.05397}$

m1 = 1.2353 kg/s

and here energy balance equation is express as

0 = Qcv - Wcv + m × [ ( h1-h2) + $\frac{v1^2-v2^2}{2}$ + g (z1-z2) ] ....................2

so here Qcv will be

Qcv = m × [ $\frac{Wcv}{m} + (h2-h1)$ ] ......................3

put here value and we get

Qcv = 1.2353 × [ {-60}+ (310.24-262.96) ]

Qcv = -15.7130 kW

so here heat transfer rate is -15.71 kW

6 0

3 years ago