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bearhunter [10]

3 years ago

12

What is made of one type of atom

1 answer:

umka21 [38]3 years ago

8 0

Any sample of an <em>ELEMENT</em> is made of only one type of atom.

Here are some elements:

-- Hydrogen, Helium, Neon

-- Carbon (lead in a pencil, also diamonds)

-- Oxygen, Nitrogen, Argon (All mixed together in air, but not hooked up with other atoms)

Other elements you may have heard of:

-- Silver, Gold, Copper, Iron, Lead, Aluminum, Silicon, Chlorine, Calcium, Titanium, Nickel, Tin, Platinum, Mercury, Radium, Uranium

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An electron and a proton, starting from rest, are accelerated through an electric potential difference of the same magnitude. in

Yakvenalex [24]

The charges are the same in absolute value, so the change of potential energy is the same. That means that the change in kinetic energy is also the same. Then:

1 = Ke/Kp = m_e *v_e^2 / m_p * v_p^2, or

v_e/v_p = sqrt( m_p/m_e),

So the speed of the electron will be sqrt( m_p/m_e) times greater than the speed of the proton

4 0

3 years ago

A NASCAR driver weighing 75 kg enters a corner with a radius of 155 meters. If his acceleration is 100 m/s2. What is tangential

Ymorist [56]

The tangential velocity of the car is 124.5 m/s

Explanation:

The centripetal acceleration of an object in uniform circular motion is given by:

$a=\frac{v^2}{r}$

where

a is the acceleration

v is the tangential velocity

r is the radius of the circle

For the car in this problem, we have:

$a=100 m/s^2$ is the centripetal acceleration

r = 155 m is the radius of the turn

Solving for v, we find the tangential velocity of the car:

$v=\sqrt{ar}=\sqrt{(100)(155)}=124.5 m/s$

Learn more about centripetal acceleration:

brainly.com/question/2562955

#LearnwithBrainly

3 0

3 years ago

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far

KIM [24]

Answer:

40 N

Explanation:

The gravitational force between the asteroid and the spaceship is given by:

$F=G\frac{mM}{R^2}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2}$ is the gravitational constant

$M$ is the mass of the asteroid

$m$ is the mass of the spaceship

$R$ is the distance between the asteroid and the spaceship

The initial force is equal to:

$F=G\frac{mM}{R^2}=360 N$

Later, the spaceship moves to a position 3 times as far from the center of the asteroid, so R' = 3R. Therefore, the new force will be

$F'=G\frac{mM}{R'^2}=G\frac{mM}{(3R)^2}=G\frac{mM}{9R^2}=\frac{1}{9}F$

so, the force is decreased by a factor 9. Since the initial force was F=360 N, the new force will be

$F'=\frac{360 N}{9}=40 N$

3 0

4 years ago

4. Plucking these wires with equal force will produce which difference in effect?

lisabon 2012 [21]

Answer:

D is the correct answer

Explanation:

5 0

3 years ago

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During an experiment a student records the net horizontal force exerted on an object moving in a straight line along a horizonta

xeze [42]

Answer:c 40kg

Explanation:

4 0

3 years ago