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4 years ago

A cheetah can go from a state of resting to running at 20 m/s in just 2 seconds.

Physics

1 answer:

Andreyy894 years ago

5 0

10 m/s2 for a distance of 65.2 ft

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The motion of an electron is given by x(t)=pt3+qt2+r, with p = -2.3 m/s^3 ,q = +1.5 m/s^2 , and r = +9.0 m.A) Determine its velo

alexandr402 [8]

Answer:

$v(0)=0\\v(1)=-3.9\ m/s\\v(2)=-21.6\ m/s\\v(3)=-53.1\ m/s$

Explanation:

Instant Velocity

Given the position as a function of time x(t), the instant velocity is the derivative of the function:

$v(t)=x'(t)$

We are given the position as

$x(t)=-2.3t^3+1.5t^2+9$

The derivative of x is

$v(t)=x'(t)=-6.9t^2+3.0t$

A) Let's compute v(0)

$v(0)=-6.9(0)^2+3.0(0)=0$

$v(1)=-6.9(1)^2+3.0(1)$

$v(1)=-3.9\ m/s$

$v(2)=-6.9(2)^2+3.0(2)$

$v(2)=-21.6\ m/s$

$v(3)=-6.9(3)^2+3.0(3)$

$v(3)=-53.1\ m/s$

4 0

3 years ago

What is the colour of a shirt which has blue and white stripes when put under yellow light? Explain.

GenaCL600 [577]

Answer:

Black and yellow strips.

Explanation:

Color of shirt is blue and white stripes

When the shirt is seen in the yellow light, the blue color do not reflect any color so it appears black and the white color reflects the yellow light so it appears yellow.

Thus, the color of shirt is blue appears black and white appears yellow.

8 0

3 years ago

If the detector readings are proportional to the amplitude of the microwave E field, the data from the first polarization experi

ololo11 [35]

Answer:

Fields and variables are proportional

Explanation:

To solve the problem we must first identify the Vector Intensity,

The intensity is given by:

$I = I_ {0} cos^2 (\theta)$

We also know that the change given by the Intensity is always the square of the amplitude,

This is,

$I = A ^ 2$

The intensity is proportional to the change exerted on $cos ^ 2 (\theta)$

That is to say that in turn the amplitus is proportional to the Intensity.

On the other hand, relating the two variables we have

$A ^ 2 = A ^ 2_ {0} cos ^ 2 \theta$

$A = A_ {0} cos \theta$

In this way we can conclude that the electric field of intensity is also proportional to $cos ^ 2 \theta$

7 0

3 years ago

How many electrons do alkali metals have in their outer shell?

BARSIC [14]

The outer shell can hold 1 electron

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antiseptic1488 [7]

Answer:

I think That All the atoms of a given element are identical in that they have the same number of protons

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3 years ago

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