Photo below with question, please help need to confirm answer Is the answer A?

Physics

1 answer:

GarryVolchara [31]3 years ago

3 0

Answer:

Only circuit A will contain to lit bulbs

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A total resistance of 3.03 Ω is to be produced by connecting an unknown resistance to a 12.18 Ω resistance. (a) What must be the

insens350 [35]

Answer:

(a) 4.0334Ω

(b)parallel

Explanation:

for resistors connected in parallel;

$\frac{1}{R_{eq} } =\frac{1}{R1}+\frac{1}{R2}$

Req =3.03Ω , R1 =12.18Ω

$\frac{1}{3.03 } =\frac{1}{12.18}+\frac{1}{R2}$

$\frac{1}{R2}=\frac{1}{3.03 }-\frac{1}{12.18}$

$\frac{1}{R2}=0.2479$

R2=1/0.2479

R2=4.0334Ω

(b)parallel connection is suitable for the desired total resistance. series connection can not be used to achieve a lower resistance as the equation for series connection is.

Req = R1+R2

3 0

4 years ago

If a laboratory fire erupts, immediately is it A. Notify your instructor. B. Run for the fire extinguisher or C. Throw water on

drek231 [11]

Answer:

Explanation:

if there is a fire there is no time to waist

8 0

3 years ago

How much energy (in kJ) do 3.0 moles of photons, all with a wavelength of 670 nm, contain??

aliina [53]

<span>Photon energy is the energy carried by a single photon with a certain wavelength and frequency. These terms are related by an equation.
E = hv
where h is the Planck's constant (6.626 x 10-34 J s), v is the frequency which is related to the wavelength by:

λv = c where λ is the wavelength and c is the speed of light (3.00 x 108 m/s)

Therefore, the energy equation
E = hc / λ
E = </span>6.626 x 10^-34 J s (3.00x10^8 m/s) / 670 x10^-9 m
E = 2.966865672x10^-19 J per photon

Total energy = 2.966865672x10^-19 J / photon ( 3.0 mol) ( 6.022x10^23 photon / 1 mol ) = 535993.95 J

7 0

4 years ago

The snowblower driver figured that he moved 1250 kg of snow. If the plow pushes with a force of 40000 Newton’s, how fast did the

alexgriva [62]

The acceleration of snow is 32 m/ $s^{2}$ .

<u>Explanation:</u>

According to Newton's second law of motion, the force acting on any object is directly proportional to the product of mass and acceleration acting on the object.

So if the object is a snowblower driver with mass 1250 kg and the force acting on it is 40000 N, then the acceleration of the snow can be determined from the ratio of force to mass.

Force = Mass × Acceleration

Acceleration = $\frac{Force}{Mass}$ = $\frac{40000}{1250}=32 m/s^{2}$