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3 years ago

How long does it take to do 300 Joules of work with 10 watts of power? 30 sec 20 sec .03 sec .30 sec

Physics

1 answer:

Oksana_A [137]3 years ago

4 0

Answer:

Explanation:

Power=work /time

10watts=300J/time

Time =30 sec

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Answer:

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3 years ago

You are holding the axle of a bicycle wheel with radius

erastova [34]

Answer:

The angular acceleration of the wheel is -6.54 rad/s²

Explanation:

We'll use the equations of motion for this.

w = 2πf

f = 75 rpm = 1.25 rps = 1.25 rev/s

w₀ = initial angular velocity = 2π × 1.25 = 7.85 rad/s

w = final angular velocity = 0 rad/s

t = 1.2 s

α = ?

w = w₀ + αt

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4 years ago

The energy spacing between levels 1 and 2 is twice that between 2 and 3. If an electron makes a transition from level 3 to level

vovikov84 [41]

Answer: $\lambda _3=\frac{\lambda }{3}$

Explanation:

Given

$E_3-E_2=\frac{hc}{\lambda }$

also $E_2-E_1=2\left ( E_3-E_2\right )$

Let wavelength produce during transition from 2 to 1 is $\lambda_0$

$\frac{hc}{\lambda _0}=2\frac{hc}{\lambda }$

$\lambda _0=\frac{\lambda }{2}$

For $E_3 to E_1 transition$

$E_3-E_1=E_3-E_2+E_2-E_1$

$E_3-E_1=\frac{hc}{\lambda }+2\frac{hc}{\lambda }$

$\frac{hc}{\lambda _3}=3\frac{hc}{\lambda }$

$\lambda _3=\frac{\lambda }{3}$

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3 years ago

En un circuito de Fórmula 1,un coche es capaz de pasar de 0 a 160 km/h en 8 segundos ¿Cuál es su aceleración?

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3 years ago

4) How many liters are in 9.23*10^19 molecules of oxygen gas?

Lapatulllka [165]

0.0034L

Explanation:

Given parameters:

Number of molecules of oxygen gas = 9.23 x 10¹⁹molecules

Unknown:

Volume of oxygen = ?

Solution:

Assuming the gas is at standard temperature and pressure conditions;

Volume of gas = number of moles x 22.4

we need to find the number of moles of the oxygen gas;

number of moles = $\frac{number of particles}{6.02 x 10[tex]^{23}$ }[/tex]

Number of moles = $\frac{9.23 x [tex]10^{19}$ }{6.02 x 10 $^{23}$ }[/tex]

Number of moles = 1.53 x 10⁻⁴moles

Volume of gas = 1.53 x 10⁻⁴ x 22.4 = 0.0034L

learn more:

STP brainly.com/question/12684384

#learnwithBrainly

3 0

3 years ago

How long does it take to do 300 Joules of work with 10 watts of power? 30 sec 20 sec .03 sec .30 sec​

How long does it take to do 300 Joules of work with 10 watts of power? 30 sec 20 sec .03 sec .30 sec