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Drupady [299]
3 years ago
12

A car is traveling 11.4 m/s. A truck having four times the mass of the car is traveling at 22.7 m/s. How many times greater is t

he trucks kinetic energy compared to the cars kinetic energy?
Physics
1 answer:
Marta_Voda [28]3 years ago
6 0
Sice the mass are four times the car the relationship between both is inverse so the kinetic is 4 times less
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A swimmer is capable of swimming at 1.4m/s in still water. a. How far downstream will he land if he swims directly across a 180m
ozzi

Answer:

t = 180 / 1.4 = 129 sec   (time to swim horizontally across river)

S = 129 sec * V     where V is speed of current and S is the distance he will be carried downstream

The problem does not specify V the speed of the river

8 0
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What is the name of the process that plants use to remove carbon dioxide from the atmosphere?
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Answer:

Photosynthesis

Explanation:

It removes carbon naturally.

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Camina con otro compañero, al mismo tiempo y al mismo paso. Quién se mueve tú o tu compañero? Razona tu respuesta
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Answer:

Fricción.

Explicación:

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5 0
3 years ago
A string of length L, fixed at both ends, is capable of vibrating at 309 Hz in its first harmonic. However, when a finger is pla
Scorpion4ik [409]

Answer:

 i = 0.3326 L

Explanation:

A fixed string at both ends presents a phenomenon of standing waves, two waves with the same frequency that are added together. The expression to describe these waves is

    2 L = n λ           n = 1, 2, 3…

The first harmonic or leather for n = 1

Wave speed is related to wavelength and frequency

     v = λ f

     λ = v / f

Let's replace in the first equation

    2 L = 1 (v / f₁)

For the shortest length L = L-l

   2 (L- l) = 1 (v / f₂)

These two equations form our equation system, let's eliminate v

    v = 2L f₁

    v = 2 (L-l) f₂

    2L f₁ = 2 (L-l) f₂

    L- l = L f₁ / f₂

    l = L - L f₁ / f₂

    l = L (1- f₁ / f₂)

.

Let's calculate

    l / L = (1- 309/463)

    i / L = 0.3326

4 0
3 years ago
What is hypothesis testing
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Hypothesis testing is basically testing the results of a experiment to see weather your results are valid or not.
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