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2 years ago

You drop a penny from the top of the Salesforce building in San Francisco. If the

Physics

1 answer:

atroni [7]2 years ago

5 0

Answer:28

Explanation: I think so because ive done this

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ASTM A229 oil-tempered carbon steel is used for a helical coil spring. The spring is wound with D = 50 mm d = 10.0 mm, and a pit

horrorfan [7]

Answer

given,

D = 50 mm = 0.05 m

d = 10 mm = 0.01 m

Force to compress the spring

$F = \dfrac{d^4G\delta}{8D^3N}$

$\dfrac{\delta}{N} = p - d = 14 - 10 = 4 mm$

$F = \dfrac{d^4G}{8D^3}\times 0.004$

$F = \dfrac{0.1^4\times 79\times 10^9}{8\times 0.05^3}\times 0.004$

F = 3160 N

stress correction factor from stress correction curve is equal to 1.1

now, calculation of corrected stress

$\tau = \dfrac{8FDk_s}{\pi d^3}$

$\tau = \dfrac{8\times 3160 \times 0.05 \times 1.1}{\pi \times 0.01^3}$

= 442.6 Mpa

The tensile strength of the steel material of ASTM A229 is equal to 1300 Mpa

now,

$\tau_s \leq 0.45 S_u$

$\tau_s \leq 0.45 \times 1300$

$\tau_s \leq 585\ Mpa$

since corrected stress is less than the $\tau_s$

hence, spring will return to its original shape.

6 0

3 years ago

Read 2 more answers

HELP PLEASEE

lozanna [386]

Answer:

Usually an eletric shock. You can be left with numbness and MAYBE problems with your eyes.

Explanation:

4 0

2 years ago

When does the potential energy of a swinging pendulum increase the most?

xxTIMURxx [149]

Maybe this can help:

https://blogs.bu.edu/ggarber/interlace/pendulum/energy-in-a-pendulum/

3 0

2 years ago

In Millikan’s experiment, the oil droplets acquire one or more negative charges by combining with the negative charges that are

alina1380 [7]

Answer:

$-9.6\cdot 10^{-19} C$

Explanation:

The charge of a single electron is:

$q=-1.60\cdot 10^{-19} C$

If a droplet contains N electrons, then its charge would be:

$Q=Nq$

In this case, the droplet has

N = 6

electrons, so its total charge is

$Q=(6)(-1.60\cdot 10^{-19}C)=-9.6\cdot 10^{-19} C$

7 0

2 years ago

Photoelectrons are observed when a metal is illuminated by light with a wavelength less than 383 nm. What is the metal's work fu

Ulleksa [173]

Answer:

Work function of the metal is 3.24 eV.

Explanation:

It is given that,

Wavelength, $\lambda=383\times 10^{-9}\ m$

Let W is the work function of the metal. It is given by using Einstein's photoelectric effect equation. It is given by :

$W=\dfrac{hc}{\lambda}$

$W=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{383\times 10^{-9}}$

$W=5.193\times 10^{-19}\ J$

Since, $1\ eV=1.6\times 10^{-19}\ J$

So, W = 3.24 eV

So, the work function of the metal is 3.24 eV. Hence, this is the required solution.

3 0

2 years ago

Read 2 more answers