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2 years ago

A block of aluminum occupies a volume of 15.0 ml and weighs 40.5 what is its density

Physics

2 answers:

satela [25.4K]2 years ago

6 0

40.5 / 15 =
2.7 g/ml

AVprozaik [17]2 years ago

5 0

D = 40.5 g / 15.0 mL<span>d = 2.70 g/mL</span>

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An electron in a hydrogen atom is in a p state. Which of the following statements is true?

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Answer:

The electron’s wavefunction has at least one node (i.e., at least one place in space where it goes to zero).

Explanation:

We know that the p-orbitals have nodes. A node is a region where the probability of finding an electron goes down to zero.

P orbitals are oriented along the x,y,z Cartesian axes and are known to have angular nodes along the axes.

Hence, if an electron in a hydrogen atom is in a p state, the electron’s wavefunction has at least one node

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2 years ago

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Answer:

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2 years ago

Two wires are hanging horizontally and parallel to one another and they are spaces 5.4 cm apart. The bottom wire carries a curre

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Answer:

299.11 A

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You first equal the magnetic force on the upper wire with the gravitational force:

$F_E=F_g\\\\i_1LB=Mg$ ( 1 ) (first term is the magnetic force produced by the magnetic force of the second wire)

i1: current of the upper wire

L: length

M: mass of the upper wire

B: magnetic field generated by the second wire

Next, you calculate the magnetic field produced by the other wire:

$B=\frac{\mu_o i_2}{2\pi r}$ (2)

i2: current of the second wire

r: distance between wires

mo: magnetic permeability of vacuum = 4pi*10^-7 T/A

Next, you replace the expression (2) into the expression (1) in order to obtain an expression for i2:

$i_1L(\frac{\mu_oi_2}{2\pi r})=Mg\\\\i_2=\frac{M}{L}\frac{2\pi r g}{\mu_oi_1}$

M/L = is the mass per unit length of the first wire

Finally, you replace the values of the parameters:

$i_2=(2.6*10^{-4}kg/m)\frac{2\pi (0.054m)(9.8m/s^2)}{(4\pi*10^{-7}T/A)(2.3A)}\\\\i_2=299.11A$

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2 years ago

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Veronika [31]

Answer:

Explanation:

In a scientific context, “pure” denotes a single type of material. Ostensibly, compounds contain more than one type of material. Yet both compounds and elements are considered pure substances. Pure compounds are created when elements combine permanently, forming one substance.

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2 years ago

If the mass of the object doubles then the acceleration is when the force is kept the same

natali 33 [55]

Answer:

Halved

Explanation:

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$F_{1}=m_{1} a_{1} \\$

Case 2 (new) be:

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$F_{1} =F_{2}$

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Acceleration is halved

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2 years ago