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3 years ago

2. Explain the rules for naming a binary compound from its formula.

Physics

1 answer:

masha68 [24]3 years ago

3 0

Answer:

The answer to this question is given below in this explanation section.

Explanation:

A binary ionic compound, a metal will always be the first element. in the formula,While a nonmetal will always be the second.The metal cation is named first,followed by the nonmetal anion.Subscript in the formula do not effects the name.

The overall charge of the compound is zero.Potassium ion is k+,While fluoride ion is F-,Since the magnitude of the charges is this would also be the case for a compound such as MgS,in which the ions are Mg2+ and S2-,For sodium nitride the sodium ion is Na=while the nitride ion is N3-.

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Explanation

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3 years ago

600 kg elephant runs at 5 m/s and jumpts onto a 100kg cart. If the coefficient of friction is .04 how far will the cart travel o

Minchanka [31]

Answer:

Eleven seconds.

Explanation:

Two keys are needed to solve this problem. First, the conservation of momentum: allowing you to calculate the cart's speed after the elephant jumped onto it. It holds that:

$m_ev_e+m_c\cdot0=(m_e+m_c)v_0\implies \\v_0=\frac{m_ev_e}{m_e+m_c}=\frac{600kg\cdot 5\frac{m}{s}}{700kg}=4.29\frac{m}{s}$

So, once loaded with an elephant, the cart was moving with a speed of 4.29m/s.

The second key is the kinematic equation for accelerated motion. There is one force acting on the cart, namely friction. The friction acts in the opposite direction to the horizontal direction of the velocity v0, its magnitude and the corresponding deceleration are:

$F_r = 0.04\cdot (m_e+m_c)g\implies a_r = 0.04\cdot g= 0.04 \cdot 9.8 \frac{m}{s^2}=0.39\frac{m}{s^2}$

The kinematic equation describing the decelerated motion is:

$v = -a_r t+v_0\\0 = -a_rt+v_0\implies \\t = \frac{v_0}{a_r}=\frac{4.29\frac{m}{s}}{0.39\frac{m}{s^2}}=11s$

It takes 11 seconds for the comical elephant-cart system to come to a halt.

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4 years ago

Is it true or false that A proton traveling to the right moves in between the two large plates. A vertical electric field, point

Lelu [443]

Answer:

False

Explanation:

In the question it is given that a proton travels in the right moves in between the two plates. An electric field that is pointing in the vertically upward direction has magnitude of 3 N/C. The electric field is produced by the plates.

Now from here we can conclude that the direction of the force acting on the proton when the proton is in between the plates acts in the downward direction. While the electric field lines points in the upward direction. Thus the electric point will not be in the direction of the force that acts on the proton.

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3 years ago