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Grace [21]
3 years ago
5

How many elements have been discovered so far?​

Physics
2 answers:
faust18 [17]3 years ago
8 0

Answer:

If you mean chemical elements... there are 118 elements discovered so far.

nlexa [21]3 years ago
7 0

Answer:

The answer is...

<u>118.</u>

<u></u>

118 elements have been discovered.

Hopefully, this helps you!!

AnimeVines

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Near to the point where I am standing on the surface of Planet X, the gravitational force on a mass m is vertically down but has
Gelneren [198K]

Answer: V = sqrt(2¥h^3)/3

Explanation:

8 0
3 years ago
The resistance of an electric heater is 50 Ω when connected to 120 V. How much energy does it use during 15 min of operation?
STALIN [3.7K]

Answer:

Explanation:

I = V/R = 120 V/ 50 Ω = 2.4 A

P = VI = 120(2.4) = 288 W = 288 J/s

288 J/s (15 min(60s / min)) = 259,200 J

or the electric company would charge for

288 W / (1000 W/kW)•(15/60) hr = 0.072 kW•hr

At $0.20 / kW•hr, that would be under 1½ cents

7 0
3 years ago
A sample of an ideal gas is heated, and its kelvin temperature doubles. What happens to the average speed of the molecules in th
BabaBlast [244]

A sample of an ideal gas is heated, and its kelvin temperature doubles. The average speed of the molecules in the sample will increases by a factor of  \sqrt{2}

The root-mean square (RMS) velocity is the value of the square root of the sum of the squares of the stacking velocity values divided by the number of values. The RMS velocity is that of a wave through sub-surface layers of different interval velocities along a specific ray path.

Root mean square speed is a statistical measurement of speed.

The root mean square speed can be calculated as : V1 : \sqrt{3 R T / Mo}

if  temperature becomes double

let T1 is initial temperature

So ,  T2 = 2 * T1

now ,

Root mean square speed will be (V2) =  \sqrt{(3 R (2T)) / Mo}

                                                     = \sqrt{2} * \sqrt{3 R T / Mo}

                                                     = \sqrt{2} V1

Thus when temperature becomes double, the root mean square speed increases by a factor of  \sqrt{2}

To learn more about root mean square velocity here

brainly.com/question/13751940

#SPJ4

3 0
1 year ago
A tube has a length of 0.025 m and a cross-sectional area of 6.5 x 10-4 m2. The tube is filled with a solution of sucrose in wat
Pepsi [2]

Answer:

The time required for sucrose transportation through the tube is 8.4319 sec.

Explanation:

Given:

L = 0.025 m

A = 6.5×10^-4 m^2

D = 5×10^-10 m^2/s

ΔC = 5.2 x 10^-3 kg/m^3

m = 5.7×10^-13 kg

Solution:

t = m×L / D×A×ΔC

t = (5.7×10^-13) × (0.025) / (5×10^-10)×(6.5×10^-4)×(5.2 x 10^-3)

t = 8.4319 sec.

5 0
3 years ago
3. How are meteors and meteorites different?
Natasha2012 [34]

Answer: a meteoroid is debris in space. If part of that debris comes into Earth's atmosphere, it becomes a meteor.

Explanation:

4 0
4 years ago
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