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2 years ago

Help thank you. will mark as brainliest if correct and no link to some unknown websites

Physics

2 answers:

Lapatulllka [165]2 years ago

5 0

The answer is 2. This is where the kinetic energy is being transferred into gravitational potential energy, and then there is complete gravitational potential energy at point 3. So the answer you are looking for is 2. I hope this helps :) please make brainliest

diamong [38]2 years ago

4 0

Position 4!! At position 4 , the roller coaster cart stores the most amount of kinetic energy. When its at position 4 , the kinetic energy of the cart will be converted to gravitational potential energy as the cart increases in height!!

I hope this answered ur qns!! ^^

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The end of a horizontal rope is attatched to a prong of an electricity driven tuning fork that vibrates at 100hz. The other end

Darina [25.2K]

here since string is attached with a mass of 2 kg

so here tension force in the rope is given as

$T = mg$

here we will have

$T = 2(9.8) = 19.6 N$

now we will have speed of wave given as

$v = \sqrt{\frac{T}{\mu}}$

here we will have

$v = \sqrt{\frac{19.6}{0.75\times 10^{-2}}}$

$v = 16.33 m/s$

now we know that frequency is given as

F = 100 Hz

now wavelength is given as

$\lambda = \frac{v}{F}$

$\lambda = \frac{16.33}{100} = 0.16 m$

so wavelength will be 0.16 m

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3 years ago

Who performed classic experiments that supported the semiconservative model of dna replication?

Salsk061 [2.6K]

Meselson and Stahl

<u>Explanation:</u>

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The classic experiment that supported the semiconservative model of dna replication was performed by Matthew Meselson and Franklin W. Stahl. In this model, the two strands of DNA unwind from each other, and each acts as a template for synthesis of a new, complementary strand. This results in two DNA molecules with one original strand and one new strand. They used E. coli bacteria as a model system.

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2 years ago

Monochromatic coherent light shines through a pair of slits. If the wavelength of the light is decreased, which of the following

Law Incorporation [45]

Answer:

he correct answers are a, b

Explanation:

In the two-slit interference phenomenon, the expression for interference is

d sin θ= m λ constructive interference

d sin θ = (m + ½) λ destructive interference

in general this phenomenon occurs for small angles, for which we can write

tanθ = y / L

tan te = sin tea / cos tea = sin tea

sin θ = y / La

derestimate the first two equations.

Let's do the calculation for constructive interference

d y / L = m λ

the distance between maximum clos is and

y = (me / d) λ

this is the position of each maximum, the distance between two consecutive maximums

y₂-y₁ = (L 2/d) λ - (L 1 / d) λ₁ y₂ -y₁ = L / d λ

examining this equation if the wavelength decreases the value of y also decreases

the same calculation for destructive interference

d y / L = (m + ½) κ

y = [(m + ½) L / d] λ

again when it decreases the decrease the distance

the correct answers are a, b

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2 years ago

A substance did not change its chemical nature in a reaction. Which most likely describes the reaction?

Andre45 [30]

B. It was hit with a hammer.

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2 years ago

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Answer:

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