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3 years ago

Learning Activity (#aqph058) AQ13PH_AQPH058_01 - Google Chrome

Physics

1 answer:

Kobotan [32]3 years ago

7 0

Speed = (frequency)•(wavelength)

Speed = (2 Hz)•(2.5 m)

Speed = 5 m/s (choice-D)

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1. When two atoms of the same nonmetal react, they often form a(an)

kkurt [141]

When two atoms of the same nonmetal react,they form what we know today as a diatomic molecule.

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3 years ago

A 6.00 kg object is lifted vertically through a distance of 5.25 m by a light string under a tension of 80.0 N. Find: (2 marks)

jeka57 [31]

Explanation:

It is given that,

Mas of the object, m = 6 kg

It is lifted through a distance, h = 5.25 m

Tension in the string, T = 80 N

(a) By considering the free body diagram of the object, the forces can be equated as :

$T-mg=ma$

$a=\dfrac{T-mg}{m}$

$a=\dfrac{80-6\times 9.8}{6}$

$a=3.33\ m/s^2$

Work done by tension, $W_t=F\times h$

$W_t=80\times 5.25$

$W_t=420\ J$

(b) Work done by gravity, $W_g=mgh$

$W_g=6\times 9.8\times 5.25$

$W_g=308.7\ J$

(c) Let v is the final speed of the object and u = 0

$v=\sqrt{2ah}$

$v=\sqrt{2\times 3.33\times 5.25}$

v = 5.91 m/s

Hence, this is the required solution.

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4 years ago

Wanda has a cube of sugar. She crushes it into a powder. What has changed about the sugar?

stira [4]

Mass always stays the same therefore it can’t be c and d. Volume stays the same because she is not removing anything. Therefore it is a

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3 years ago

Read 2 more answers

Billy and Bob want to know if the amount of baking soda added to vinegar will affect the height a rocket will launch. They will

Tatiana [17]

Answer:

hypothesis: Billy and Bob want to know if the amount of baking soda added to vinegar will affect the height a rocket will launch. They will measure the height of the rocket launch in meters

Explanation:

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3 years ago

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A red photon has a wavelength of 650 nm. An ultraviolet photon has a wavelength of 250 nm. The energy of an ultraviolet photon i

zimovet [89]

The energy of an ultraviolet photon is 2.6 times greater than a red photon.

<h3>Energy of a photon</h3>

The energy of a given photon of light is calculated using the wavelength and the speed of light.

<h3>Energy of a red photon</h3>

The energy of the a red photon at the given wavelength is calculated as follows;

$E_r = \frac{hc}{\lambda} \\\\E_r = \frac{6.67 \times 10^{-34} \times 3 \times 10^8}{650 \times 10^{-9}} \\\\E_r = 3.078 \times 10^{-19} \ J$

<h3>Energy of an ultraviolet photon</h3>

$E_r = \frac{hc}{\lambda} \\\\E_r = \frac{6.67 \times 10^{-34} \times 3 \times 10^8}{250 \times 10^{-9}} \\\\E_r = 8.0 \times 10^{-19} \ J$

<h3>The ratio of the two energies</h3>

$= \frac{8.0 \times 10^{-19}}{3.078 \times 10^{-19}} \\\\= 2.6$

Thus, the energy of an ultraviolet photon is 2.6 times greater than a red photon.

Learn more about energy of a photon here: brainly.com/question/7464909

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3 years ago