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Triss [41]
3 years ago
11

A camcorder has a power rating of 11 watts. If the output voltage from its battery is 3 volts, what current does it use? amps

Physics
2 answers:
disa [49]3 years ago
5 0

Answer:

3.67 A

Explanation:

The power rating is related to the voltage and the current by the following equation:

P=VI

where

P is the power rating

V is the voltage

I is the current

In this situation, we have:

P = 11 W

V = 3 V

I = ?

So, we can re-arrange the equation to calculate the current used:

I=\frac{P}{V}=\frac{11 W}{3 V}=3.67 A

sergey [27]3 years ago
4 0
Current = Power/Voltage. 11W/3v = 3.67Amps
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In what part of a volcano would you expect to find rocks with the coarsest grains
galben [10]

Answer:

The correct answer is: in the magma chamber.

Explanation:

The volcanoes are creating igneous rocks, and they can be intrusive and extrusive. The intrusive ones are forming deep into the ground, while the extrusive are forming on the surface. Where the rocks are formed makes a big difference in their crystals size. The rocks that form by magma that has cooled the deepest into the ground would have the largest crystals, thus the coarsest grains. The reason for this is that the magma that has been cooling the deepest into the ground will be exposed to higher temperatures and pressures, which will lead to a very slow cooling off. Because the cooling off will be at such a slow rate, the crystals will have enough time to became much larger. The deepest part of a volcano is its magma chamber, thus it will be the place that will produce the coarsest grained igneous rocks.

4 0
3 years ago
Ajani is trying to experimentally measure Planck's constant h. He does this by shining different wavelengths of monochro- matic
olga_2 [115]

Answer:

h = 1.01 x 10⁻³⁴ J.s

Explanation:

The energy applied by the voltage must be equal to the energy associated with the wavelength of light:

eV = \frac{hc}{\lambda}\\

where,

e = charge on electron = 1.6 x 10⁻¹⁹ C

V = stopping potential

h = Planck's Constant = ?

c = speed of light = 3 x 10⁸ m/s

λ = wavelength of light

For λ = 400 nm = 4 x 10⁻⁷ m, V = 0.7 V:

(1.6\ x\ 10^{-19}\ C)(0.7\ V) = \frac{h(3\ x\ 10^8\ m/s)}{4\ x\ 10^{-7}\ m}\\

h = 1.49 x 10⁻³⁴ J.s

For λ = 500 nm = 5 x 10⁻⁷ m, V = 0.2 V:

(1.6\ x\ 10^{-19}\ C)(0.2\ V) = \frac{h(3\ x\ 10^8\ m/s)}{5\ x\ 10^{-7}\ m}\\

h = 0.53 x 10⁻³⁴ J.s

Taking average of both values:

h = \frac{(0.53+1.49)\ x\ 10^{-19}\ J.s}{2}

<u>h = 1.01 x 10⁻³⁴ J.s</u>

3 0
3 years ago
A negatively charged object is brought near the knob of a negatively charged electroscope. The leaves of the electroscope will..
vladimir1956 [14]
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5 0
3 years ago
HELPPPPP ASAPPP!!!!!!!
bezimeni [28]

Answer:

The tension T in each of the cables, T = 98 N

Explanation:

Given,

The mass of the loudspeaker, m = 20.0 Kg

The suspended distance of the loudspeaker, d = 2.20 m

The length of each cable, l = 2.9 m

The tension experienced by the cable is given by the formula,

                           T = mg + ma    newton

Where,

                        g - acceleration due to gravity

                        a-acceleration produced by the stretched cable

Since the stretched cable and loudspeaker is not moving, then the tension force acting on the cable is equal to the force of gravity.

                              T = mg  newton

Substituting the values in the above equation

                              T = 20

                                 = 20.0 Kg x 9.8 m/s²

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This force is equally supported by the two cables, then the tension in each cable is

                                  T = 196 N / 2

                                     = 98 N

Hence, the tension T in each of the cables, T = 98 N

4 0
4 years ago
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