As your hand moves back and forth to generate longitudinal pulses in a spiral spring, your

Reduce the work output

andriy [413]

Maybe The 3rd One Not Sure!

6 0

2 years ago

Nich

kramer

Answer:

hello

Explanation:

7 0

2 years ago

Determine the approximate density of a high-leaded brass that has a composition of 61.5 wt% Cu, 33.5 wt% Zn, and 5.0 wt% Pb. The

SOVA2 [1]

To solve this problem it is necessary to apply the concept related to the definition of Density. Density is defined as the relationship between volume and mass. The greater the volume with respect to the mass, the smaller the mass tends to be and vice versa. By definition it is given by the formula:

$\rho = \frac{m}{V}$

Where,

V= Volume

m = Mass

From the data given we have to,

$\% of Cu = 61\% \Rightarrow \rho_{Cu}=8.96g/cm^3$

$\% of Zn = 33.5\%\Rightarrow \rho_{Zn}= 7.14g/cm^3$

$\% of Pb = 5\%\Rightarrow \rho_{Pb}=11.35g/cm^3$

1g of the alloy will contain 0.61g Cu, 0.335g Zn and 0.05g Pb

Therefore if we calculate the volume of each element we have,

$V=\frac{m}{\rho}$

$V_{Cu}=\frac{0.61g}{8.96g/cm^3}=0.06808cm^3$

$V_{Zn}=\frac{0.335g}{7.14g/cm^3}=0.0469cm^3$

$V_{Pb}=\frac{0.05g}{11.35g/cm^3}=0.0044cm^3$

$V_{total} = 0.73221cm^3$

The density of the alloy would be

$\rho = \frac{m}{V}$

$\rho = \frac{1g}{0.73221}$

$\rho = 1.3659g/cm^3$

Therefore the density of the alloy is $1.3659g/cm^3$

6 0

2 years ago

When encountering a powerboat in darkness or reduced visibility, what do visible white and red lights indicate?.

MakcuM [25]

A visible white and red light indicate a second craft is coming from the starboard (right) side.

<h3>What is a navigation light?</h3>

A navigation light often referred to as a running light or position light, is a source of illumination aboard a ship, plane, or spacecraft that provides information about the location, course, or condition of the vehicle. Red and green navigation lights help with traffic control by indicating the orientation of the craft.

All navigation light systems typically comprise one or more white lights as well as red and green sidelights that designate the boat's port and starboard sides.

Having a flashlight on board is also essential since you never know when a navigation light may go out.

The typical navigational lights:

SidelightsSternlightMasthead lampoverall white lighting

Sidelights: Because they are visible to other vessels approaching from the side or head-on, these red and green lights are sometimes known as combo lights. The port (left) and starboard (right) sides of a ship are indicated by the red and green lights, respectively.

sternlight: Only from behind or almost behind the ship can one see the sternlight.

To know more about navigation light refer to: brainly.com/question/3465458

#SPJ4

8 0

1 year ago

Which compound is composed of oppositely charged ions

Yuki888 [10]

Answer:

Na20

Explanation:

Compound having oppositely charged ions are considered as ionic compounds.

Ionic compounds are formed when complete transfer of electrons takes place between the atoms forming a bond. This bond is formed between a metal and a non-metal or a polyatomic cation and an non-metal or a metal and a polyatomic anion. For Example: etc..

Covalent compounds are formed when sharing of electrons takes place between the atoms forming a bond. This bond is formed between two non-metals. For Example: etc..

Read more on Brainly.com - brainly.com/question/6240401#readmore

7 0

2 years ago