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3 years ago

As you move from left to right across the periodic table, what happens (in terms of metals/nonmetals, etc.)?

Physics

2 answers:

Andru [333]3 years ago

8 0

Answer:

Hope it helps;)

Have a good day

stepan [7]3 years ago

8 0

As you move from left to right across the periodic table, you start to leave the metals and run into the metalloids like boron and silicon. As you keep going right, you eventually run into the non metals like carbon, nitrogen, and oxygen. Metals and non metals are separated by a diagonal line.

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A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axi

Marrrta [24]

Answer:

h = 2.64 meters

Explanation:

It is given that,

Mass of one ball, $m_1=3\ kg$

Speed of the first ball, $v_1=20\ m/s$ (upward)

Mass of the other ball, $m_2=2\ kg$

Speed of the other ball, $v_2=-12\ m/s$ (downward)

We know that in an inelastic collision, after the collision, both objects move with one common speed. Let it is given by V. Using the conservation of momentum to find it as :

$V=\dfrac{m_1v_1+m_2v_2}{m_1+m_2}$

$V=\dfrac{3\times 20+2\times (-12)}{3+2}$

V = 7.2 m/s

Let h is the height reached by the combined balls of putty rise above the collision point. Using the conservation of energy as :

$mgh=\dfrac{1}{2}mV^2$

$h=\dfrac{V^2}{2g}$

$h=\dfrac{7.2^2}{2\times 9.8}$

h = 2.64 meters

So, the height reached by the combined mass is 2.64 meters. Hence, this is the required solution.

5 0

3 years ago

A computer disk drive is turned on starting from rest and has a constant angular acceleration. If it took 0.750 seconds for the

Irina-Kira [14]

Answer:

a) Θ = ω₀*t + ½αt² To complete first revolution 2π rads = 0*t + ½αt² and to complete the first and second combined 4π rads = 0*t + ½α(t+0.810s)² Divide second by first: 2 = (t + 0.810s)² / t² This is quadratic in t and has roots at t = -0.336 s ← ignore and t = 1.96 s ◄ b) Use either equation from above: 2π rads = 0*t + ½α(1.96s)² α = 3.27 rad/s² ◄ Hope this helps!

Explanation:

6 0

3 years ago

A sound source emits 20.0 W of acoustical power spread equally in all directions. The threshold of hearing is 1.0 × 10-12 W/m2.

ahrayia [7]

Answer:

0.0018 W/m²

Explanation:

Power and intensity are related as:

$I=\frac{P}{4\pi r^2}$

P= 20.0 W (given)

r = 30.0 m (given)

$I=\frac{20.0}{4\pi(30.0)^2}=0.0018 W/m^2$

Intensity in decibels:

$I(dB)=10log\frac{I}{I_o}\\=10log\frac{0.0018}{10^{-12}}=92.5 dB$

7 0

3 years ago

How much current flows through a 100- ohm device connected to a 1.5- volt battery

Stolb23 [73]

Answer:

0.015A

Explanation:

I=V/R

=1.5/100

0.015A

Just apply ohm's law

5 0

2 years ago

A skydiver accelerates from REST at 9.8 m/s² for the first 5m of their fall. Calculate their final speed. (Give your answer to 2

Kaylis [27]

Answer:

The final speed is 9.89 m/s.

Explanation:

Initial speed of skydiver is 0 as it was rest.

Acceleration of the skydiver is 9.8 m/s²

It accelerates for the first 5 m of their fall.

It is required to find their final speed. Let v is the final speed. It can be calculated using third equation of motion.

$v^2-u^2=2as$

Here, u = 0

a = 9.8 m/s²

s = 5 m

$v=\sqrt{2gs} \\\\v=\sqrt{2\times 9.8\times 5} \\\\v=9.89\ m/s$

So, the final speed is 9.89 m/s.

5 0

3 years ago