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3 years ago

Question 12 of 25

2 answers:

5 0

C kinetic energy bc it consists of the total kinetic energy of all its atoms and molecules. It is a form of energy related to heat and temperature

Kisachek [45]3 years ago

3 0

C it’s kinetic energy

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A rigid, insulated tank that is initially evacuated is connected through a valve to a supply line that carries steam at 1 MPa an

ss7ja [257]

Answer:

Explanation:

The steam was earlier at 300 ° C. and pressure of 1 MPa. When the gas is allowed to expand against vacuum , work done by the gas is nil because there is no external pressure against which it has to work . Therefore there will not be any change in its internal energy. Since the tank is insulated therefore there is no possibility of external heat to increase its internal energy.

Hence the temperature of gas will remain unaffected. It will remain stagnant at 300

3 0

3 years ago

How far apart must two point charges of 75.0 nC (typical of static electricity) be to have a force of 1.00 N between them?

viktelen [127]

Answer:

0.71 cm

Explanation:

$q_1=75.0nC=75\times 10^{-9}C$

$1nC=10^{-9}C$

$q_2=75.0nC=75\times 10^{-9}C$

Force between two charges=1 N

Coulomb's law of force

$F=\frac{kq_1q_2}{r^2}$

Where k= $9\times 10^9Nm^2/C^2$

Using the formula

$1=\frac{9\times 10^9\times 75\times 10^{-9}\times 75\times 10^{-9}}{r^2}$

$r^2=0.50625\times 10^{-4}$ m

$r=\sqrt{0.50625\times 10^{-4}}=0.71\times 10^{-2} m$

$r=0.71\times 10^{-2}\times 10^{2}=0.71\times 10^{-2+2}=0.71\times 10^0=0.71 cm$

Using formula

$1 m=10^2cm, a^x\cdot a^y=a^{x+y}, a^0=1$

Hence, the distance between two charges =r=0.71 cm

6 0

3 years ago

As you build circuits, you will alter voltage, which is the variable. You will measure how changing the voltage affects the curr

Sidana [21]

Answer:

Independent, dependent, resistance

Explanation:

An independent variable is the one which is varied to test changes in the dependent variable. In the given experiment, voltage is an independent variable is which is being varied and it's effect on current (dependent variable) is being tested. Resistance being held constant.

According to Ohm's Law, current is proportional to voltage.

V = I R

R is resistance

7 0

3 years ago

Read 2 more answers

football game customarily begins with a coin toss to determine who kicks off. The referee tosses the coin up with an initial spe

LuckyWell [14K]

Answer:

1.28 m

Explanation:

You are given the initial speed that is 5 m/s. Since the coin is sent upwards, this means that the speed is positive according to the co-ordinate system in the y axis. Additionally, there is the gravity that curbs the coin in the opposite direction making the final speed becomes zero at the highest point, so the gravity takes negative sign.