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2 years ago

This is my question. I need the answer stat.

Physics

2 answers:

Delvig [45]2 years ago

6 0

The safety stuff should be put on before you do anything else.

Even before you load the lab coffeepot.

Kipish [7]2 years ago

5 0

Answer:

Explanatioyour answers look right, but if there has , has to be another answer its a , but your answers are right

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Electromagnetic waves can transfer energy without which of the following?

Ugo [173]

The correct answer is A. Electromagnetic waves can transfer energy without a medium. Heat can be transferred through a vacuum only via radiation. Infrared waves are electromagnetic waves that does not require a medium to travel. Heat is transferred in a vacuum in the form of infrared waves.

7 0

3 years ago

Read 2 more answers

A cylindrical specimen of some metal alloy 11.2 mm (0.4409 in.) in diameter is stressed elastically in tension. A force of 14100

MrRissso [65]

Answer:

μ = 0.436

Explanation:

Given:

Change in diameter, ΔD = 7 × 10⁻³ mm

Original diameter, D = 11.2 mm = 11.2 × 10⁻³ m

Applied force, P = 14100 N

Cross-section area of the specimen, A = $\frac{\pi}{4}D^2$ = $\frac{\pi}{4}(11.2\times 10^{-3})^2$

Now,

elongation due to tensile force is given as:

$\delta = \frac{PL}{AE}$

$\frac{\delta}{L} = \frac{P}{AE}$

on substituting the values, we get

$\frac{\delta}{L} = \frac{14100}{\frac{\pi}{4}(11.2\times 10^{-3})^2\times100\times 10^9}$

$\frac{\delta}{L} = 0.00143=\epsilon_x$

where,

$\epsilon_x$ is the strain in the direction of force

Now,

$\epsilon_z=\frac{\Delta D}{D}=\frac{7\times 10^{-3}}{11.2}=0.000625$

now, the poisson ratio, μ is given as:

$\mu=\frac{\epsilon_z}{\epsilon_x}$

on substituting the values we get,

$\mu=\frac{0.000625}{0.00143}=0.436$

7 0

3 years ago

Read 2 more answers

Match the descriptions to the feature,

Marysya12 [62]

Answer:

Vertex: Point where the principal axis and mirror meet

Focal point: Point we are reflected light converges or appears to diverge

Focal length: distance from the center of a mirror to the focal point

Principal axis: line that runs to the center of curvature to a mirror

Center of curvature: sensor of spherical mirror from which a curved mirror was cut

Explanation:

Just did the assignment on Edge.

4 0

3 years ago

A student runs 100 meters in 11 seconds. What is the speed of the student?

GarryVolchara [31]

Speed = distance / time

speed = 100 / 11

speed = 9.09m/s

to get rid of meters and get miles you want to multiply by 1 mile then divide by 1609 meters. to get hours, you times the amount of seconds in an hour (3600) and divide by 1 hour

9.09m/s × 1mile / 1609m × 3600s / 1 hour = 20.3 miles / hour

5 0

3 years ago

Read 2 more answers

One astronomical unit, or one AU is defined as the: A. Distance traveled by light in one year B. Mean distance between the Sun a

Ne4ueva [31]

Answer:

Option (B)

Explanation:

To measure the distance between two objects we use the units of length.

To measure small distances we use, mm or cm or m. But if we measure large distances between two objects we use large units such that kilometer or miles.

To measure the very large distances between two objects we use large units such as Astronomical unit or Parsec.

The Astronomical unit is defied as the distance between earth and Sun.

Thus, the distance between earth and the sun is defined as 1 Astronomical unit.

1 Astronomical unit = 1 A.U. = 1.5 x 10^8 km = 1.5 x 10^11 m

4 0

3 years ago