The hydrogen and helium under the clouds of Jupiter are in liquid form due to ____

In a two planet system, what happens to the period when velocity is maximized? a. It increases. c. It decreases. b. It remains c

bekas [8.4K]

I think d but if its wrong im sorry

4 0

4 years ago

Read 2 more answers

The power of the kettle was 1.5 kW. The 0.2kg heating element took 5 seconds to heat from 20 °C to 100 °C. Calculate the specifi

Debora [2.8K]

Answer:

Specific heat capacity, c = 468.75 J/Kg°C

Explanation:

Given the following data;

Power = 1.5 kW to Watts = 1.5 * 1000 = 1500 Watts

Time = 5 seconds

Mass = 0.2 kg

Initial temperature = 20°C

Final temperature = 100°C

To find specific heat capacity;

First of all, we would have to determine the energy consumption of the kettle;

Energy = power * time

Energy = 1500 * 5

Energy = 7500 Joules

Next, we would calculate the specific heat capacity of water.

Heat capacity is given by the formula;

$Q = mcdt$

Where;

Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.

dt = T2 - T1

dt = 100 - 20

dt = 80°C

Making c the subject of formula, we have;

$c = \frac {Q}{mdt}$

Substituting into the equation, we have;

$c = \frac {7500}{0.2*80}$

$c = \frac {7500}{16}$

Specific heat capacity, c = 468.75 J/Kg°C

7 0

3 years ago

A piston–cylinder device initially contains steam at 3.5 MPa, superheated by 5°C. Now, steam loses heat to the surroundings and

velikii [3]

Answer :

(a) The Initial temperature of the steam is 247.557°C

(b) The enthalpy change per unit mass of the steam is -1771 kJ/kg

(c) The final pressure is 1555 kPa, and the liquid vapor mixture contains small mass of vapor.

Explanation :

From the given statements, we know

Initial steam pressure ( $P_1$ ) = 3.5 MPa

Degree of Super heat = 5°C

Saturation Temperature ( $T_s_a_t$ ) = 242.557°C [From Steam Table]

Now, the Initial temperature ( $T_1$ ) of steam is given by-

$T_1$ = $T_s_a_t$ + Degree of Superheat

= 242.557 + 5 = 247.557°C

(b)To find: The enthalpy change per unit mass of the steam is

We know enthalpy (h) change is given by

Δh = $h_2$ – $h_1$

From steam Table, properties of the gas at state 1 and state 2

$h_1$ = 2821.1 kJ/kg

$h_2$ = 1049.7 kJ/kg

On substituting the values, we get

or, Δh = 1049.7 - 2821.1 = -1771 kJ/kg

(c) To Find: The final pressure of the liquid vapor mixture contains small mass of vapor.

We find that the gas at the final position, i.e., at position 3

Final Temperature ( $T_3$ ) = 200°C [Given] ……………………………..(1)

Specific Volume ( $v_3$ ) = Specific Volume ( $v_2$ ) = 0.00123 $m^3$ /kg ….....(2)

Using steam table for corresponding values of (1) and (2), we get

Final Pressure $P_3$ = 1555 kPa

Dryness fraction ( $x_3$ ) = 0.0006.

6 0

3 years ago

How is volume calculator giving mass and density

ohaa [14]

Divide the mass by the density of the substance to determine the volume (mass/density = volume). Remember to keep the units of measure consistent. For example, if the density is given in grams per cubic centimeter, then measure the mass in grams and give the volume in cubic centimeters.

5 0

3 years ago

Story on where there is a will there's a way

Nikitich [7]

Lol what i think i’ve heard of that story

4 0

4 years ago

The hydrogen and helium under the clouds of Jupiter are in liquid form due to _____.