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Verizon [17]
3 years ago
15

Which scientist discovered the two radioactive elements radium and polonium?

Physics
2 answers:
Sonbull [250]3 years ago
8 0
Marie Curie discovered the radioactive elements.
anyanavicka [17]3 years ago
7 0

Answer:

Marie Curie worked with her husband Pierre discovered the two radioactive elements radium and polonium.

Explanation:

Marie Curie and Pierre Curie discovered the two radioactive elements radium and polonium.

In the year 1898, the curies discovered the radioactive elements and they named the radioactive element as polonium in the honor of native place. Marie curies in the same year discovered radium  .

The Curies were given Nobel prize in physics in the year 1903, for their radioactivity work.

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A 2.0 kg particle moves in a circle of radius 3.1 m. As you look down on the plane of its orbit, the particle is initially movin
Ghella [55]

Answer

given,

L(t) = 10 - 3.5 t

mass of particle = 2 Kg

radius of the circle = 3.1 m

a) torque

    τ = \dfrac{dL}{dt}

    τ = \dfrac{d}{dt}(10 - 3.5 t)

    τ = -3.5 N.m

Particle rotates clockwise as i look down the plane. Hence, its angular velocity is downward.

L decreases the angular acceleration upward. so, net torque is upward.

b) Moment of inertia of the particle

    I = m R^2

    I = 2 x 3.1²

    I = 19.22 kg.m²

    L = I ω

    ω = \dfrac{L}{I}

    ω = \dfrac{10 - 3.5 t}{19.22}

    ω = 0.520 - 0.182 t

  A = 0.52 rad/s             B = -0.182 rad/s²

5 0
3 years ago
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Olegator [25]
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6 0
3 years ago
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What do neon,oxygen and nitrogen have in common?
julsineya [31]
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What is the speed over the ground of a mosquito flying 2 m/s relative to the air against a 2 m/s headwind?
salantis [7]

We have that the speed over the ground of a mosquito flying 2 m/s relative to the air against a 2 m/s headwind is

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From the question we are told that

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Generally

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For more information on this visit

brainly.com/question/22271063?referrer=searchResults

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4 years ago
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