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3 years ago

Key concepts (Example | scientific method

Physics

2 answers:

motikmotik3 years ago

8 0

Answer: planning an investigation

Explanation:

nekit [7.7K]3 years ago

3 0

Vocabulary should be, I think:
I. Hypothesis
II. Evidence, data
III. Experiment

What is your question exactly?

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The speed of surface waves in water decreases as the water becomes shallower. Suppose waves travel across the surface of a lake

Elanso [62]

Answer:

The correct solution is "1.2 m".

Explanation:

The given values are:

Wavelength of waves,

λ = 1.5 m

Speed of waves on surface,

V = 2 m/sec

Speed of waves in water,

V₁ = 1.6 m/sec

As we know,

⇒ $V=f\times \lambda$

or,

⇒ $f=\frac{V}{\lambda}$

On substituting the values, we get

⇒ $=\frac{2}{1.5}$

⇒ $=1.33 \ Hz$

hence,

⇒ $\lambda_1=\frac{V_1}{f}$

On substituting the values, we get

⇒ $=\frac{1.6}{1.33}$

⇒ $=1.2 \ m$

7 0

3 years ago

A student at the top of a building of height h throws ball A straight upward with speed v0 (3 m/s) and throws ball B straight do

Flauer [41]

Answer:same

Explanation:

Given

ball A initial velocity=3 m/s(upward)

Ball B initial velocity=3 m/s (downward)

Acceleration on both the balls will be acceleration due to gravity which will be downward in direction

Both acceleration is equal

For ball A

maximum height reached is $h_1=\frac{3^2}{2g}$

After that it starts to move downwards

thus ball have to travel a distance of h_1+h(building height)

so ball A final velocity when it reaches the ground is

$v_a^2=2g\left ( h_1+h\right )$

$v_a^2=2g\left ( 0.458+h\right )$

$v_a=\sqrt{2g\left ( 0.458+h\right )}$

For ball b

$v_b^2-\left ( 3\right )^2=2g\left ( h\right )$

$v_b^2=2g\left ( \frac{3^2}{2g}+h\right )$

$v_b=\sqrt{2g\left ( 0.458+h\right )}$

thus $v_a=v_b$

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3 years ago

Why is aluminum suitable material to use in makinv cans based on its physical and chemical properties

Llana [10]

low density, malleable, easy to form into shapes, not very chem reactive

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3 years ago

The density of atmosphere (measured in kilograms/meter3) on a certain planet is found to decrease as altitude increases (as meas

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I know that the relationship between altitude and atmospheric density is that the higher the altitude, the lesser the density, and the lower the altitude the higher the density. Lower density float to the top, and higher density is 'heavy' so it comes down

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3 years ago

One radian per second is equal to?

Ostrovityanka [42]

One radian per second is equal to 206265 seconds of arc. (On a plane angle)

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