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3 years ago

HELP ASAP PLEASEEEE!!!

Physics

2 answers:

Sunny_sXe [5.5K]3 years ago

8 0

Answer:

try on your computer

Explanation:

irga5000 [103]3 years ago

6 0

Answer:

132321

Explanation:

It’s that answers

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If a circuit contains a 12v battery and two 3 bulbs in series

Paha777 [63]

If the resistance of each bulb is 3 ohms, and they are connected across the battery, then current will flow through them.

In series, the two 3-ohm bulbs will look like a single 6-ohm resistance.

Current = (voltage) / (resistance) = (12v) / (6 ohms) = 2 Amperes.

The battery will need to deliver some power to the circuit.

Power = (voltage) x (current) = (12v) x (2 Amperes) = 24 watts .

Each bulb will dissipate 12 watts, in the form of light and heat.

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4 years ago

The specific heat of aluminum is 0.90 J/gC . How much heat is given off when 25 grams of aluminum is cooled from 55 C to 25 C?

xxMikexx [17]

Answer:

Q = 675 [J]

Explanation:

We can calculate the amount of heat transfer by means of the following expression that includes the mass and temperature change in a body as a function of the specific heat.

$Q=m*C_{p}*(T_{initial}-T_{final})$

where:

m = mass = 25 [gr]

Cp = specific heat = 0.9 [J/g*°C]

Tinitial = 55 [°C]

Tfinal = 25 [°C]

$Q=25*0.9*(55-25)\\Q=675 [J]$

4 0

3 years ago

4.2 a horizontal force of 4 400 N, acting to the right, is applied on a car of mass 1000kg on horizontal surface. the surface ex

soldi70 [24.7K]

Answer:

three properties of intrinsic semiconductor

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2 years ago

Em um fio condutor uma carga de 6.000 C atravessa uma secção transversal em 5 minutos. Determinando-se a corrente no fio, encont

photoshop1234 [79]

Answer:

I = 20 A

Explanation:

The question says that, "A load of 6,000 C is conducted through a cross section in 5 minutes. Determining-if a current is not correct, we will find the value of?"

We have,

Charge, q = 6,000 C

Time, t = 5 minutes = 300 s

We need to find the current. We know that, the charge flowing per unit time is equal to current. So,

$I=\dfrac{q}{t}\\\\I=\dfrac{6000}{300}\\\\I=20\ A$