4 years ago

What did Bohr hypothesize about the atom?

Physics

1 answer:

Svetach [21]4 years ago

7 0

Bohr described the Planetary theory. the atom has a positive nucleus with electrons orbiting around them like planets.

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The heating element has a power of 2.5kW. The resistance of the heating is 17(ohms)

bezimeni [28]

Answer:

I = 12.12 A

Explanation:

P = 2.5 kw = 2500 w

formula

$P=I^{2} R$

$I=\sqrt{\frac{p}{R} } =\sqrt{\frac{1500}{17} } =\sqrt{147.06} =12.12 amp$

Hope this helps

8 0

2 years ago

The blades of a fan running at low speed turn at 26.2 rad/s. When the fan is switched to high speed, the rotation rate increases

Lady bird [3.3K]

Answer: $1.79\ rad/s^2$

Explanation:

Given

Initial angular speed is $\omega_1=26.2\ rad/s$

Final angular speed is $\omega_2=36.5\ rad/s$

Time period $t=5.75\ s$

Magnitude of the fan's acceleration is given by

$\Rightarrow \alpha=\dfrac{\omega_2-\omega_1}{t}$

Insert the values

$\Rightarrow \alpha=\dfrac{36.5-26.2}{5.75}\\\\\Rightarrow \alpha=\dfrac{10.3}{5.75}\\\\\Rightarrow \alpha=1.79\ rad/s^2$

Thus, fan angular acceleration is $1.79\ rad/s^2$

8 0

3 years ago

Read 2 more answers

Which, at the same temperature, will cool slower on a hot day

kykrilka [37]

The answer would be b.

6 0

3 years ago

What would be the distance moved if we had a 70 n force and work done is 8j

Lostsunrise [7]

Answer:

0.1143m

Explanation:

W=f×s

8=70s

make s the subject of the formula

s=8/70

=0.1143m

3 0

3 years ago

Helppppppppppppppppppppppppppppppppppppppppppppppp

marta [7]

Answer:

My logic:

Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Universe.

Hope this helps!

8 0

3 years ago