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Oduvanchick [21]
3 years ago
14

Which shows the conversion of 2.09 × 10-4 meters to millimeters?

Physics
1 answer:
Ivenika [448]3 years ago
4 0
I think its A I hope this help thank you!!
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What will the resistance be for a lamp that draws 4.6 amps of current from a 120-volt outlet? A. 550 ohms B. 115 ohms C. 26 ohms
Paraphin [41]
R = V/I = 120 / 4.6 ≈ 26 ohms.

Option C.
3 0
3 years ago
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Calculate the heat added to 3kg of water if the temperature increases from 30 C to 60 C.
sweet-ann [11.9K]

Answer:  B is right

Explanation:  Heat Q =  m Cv ΔT = 3.0 kg · 4186 J / (kg·K) · 30 K≈ 376 740 J

5 0
3 years ago
0.0884 moles of a diatomic gas
Sloan [31]

Answer:

W = - 118.24 J (negative sign shows that work is done on piston)

Explanation:

First, we find the change in internal energy of the diatomic gas by using the following formula:

\Delta\ U = nC_{v}\Delta\ T

where,

ΔU = Change in internal energy of gas = ?

n = no. of moles of gas = 0.0884 mole

Cv = Molar Specific Heat at constant volume = 5R/2 (for diatomic gases)

Cv = 5(8.314 J/mol.K)/2 = 20.785 J/mol.K

ΔT = Rise in Temperature = 18.8 K

Therefore,

\Delta\ U = (0.0884\ moles)(20.785\ J/mol.K)(18.8\ K)\\\Delta\ U = 34.54\ J

Now, we can apply First Law of Thermodynamics as follows:

\Delta\ Q = \Delta\ U + W

where,

ΔQ = Heat flow = - 83.7 J (negative sign due to outflow)

W = Work done = ?

Therefore,

-83.7\ J = 34.54\ J + W\\W = -83.7\ J - 34.54\ J\\

<u>W = - 118.24 J (negative sign shows that work is done on piston)</u>

7 0
3 years ago
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On Earth, the gravitational field strength is 10 N/kg. Calculate Ep for a 4 kg bowling ball have that is being held 2 m above th
Soloha48 [4]

Answer:

80 J

Explanation:

Ep = mgh

Ep = (4 kg) (10 m/s²) (2 m)

Ep = 80 J

4 0
3 years ago
Which type of wave does the illustration depict?
Naddika [18.5K]
A transverse wave. A wave is a disturbance that transmits energy from one place to another by the particles of the medium.
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