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4 years ago

11

What was the average number of tropical storms per season for the time period 1995-2004?

1 answer:

Sloan [31]4 years ago

7 0

13 compared to 8.3.................................

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One way to measure g on another planet or moon by remote sensing is to measure how long it takes an object to fall a given dista

devlian [24]

Answer:

2.24 m/s²

Explanation:

Using equation of motion

s = ut + $\frac{1}{2}$ at²

u = 0 , t = 3.17 s , s = 11.26 m

Put these values in the equation above

11.26 = 0 +.5 x a( 3.17)²

a = 2.24 ms⁻².

So acceleration due to gravity on that planet will be 2.24 m s⁻².

7 0

3 years ago

A block of mass 3 kg slides down a frictionless inclined plane of length 6 m and height 4 m. If the block is released from rest

Ludmilka [50]

(if it's frictionless the length doesn't even matter :) )
It would have the same kinetic energy down as the potential energy up. That is, $mgh=\frac{mv^2}{2}$ or $2gh=v^2$ (the mass doesn't even matter). The result is $\sqrt{2gh}$ , so only the height matters really. It is almost 9 (it is $\sqrt{80}=4\sqrt{5}$ ).

6 0

4 years ago

Given two vectors A⃗ =4.00i^+7.00j^ and B⃗ =5.00i^−2.00j^ , find the vector product A⃗ ×B⃗ (expressed in unit vectors).

Reptile [31]

Answer:

$-43\hat{k}$

Explanation:

given,

$\vec{A} = 4 \hat{i} + 7 \hat{j}$

$\vec{B} = 5 \hat{i} - 2 \hat{j}$

vector product $\vec{A} \times \vec{B} = ?$

$\vec{A} \times \vec{B}$ = $\begin{bmatrix}i & j & k\\ 4 & 7 &0 \\ 5 & -2 & 0\end{bmatrix}$

now, expanding the vector

$\vec{A} \times \vec{B}= \hat{k}(-2\times 4 - 7\times 5)$

$\vec{A} \times \vec{B}= -43\hat{k}$

the vector product is equal to $-43\hat{k}$

4 0

4 years ago

A light beam is directed parallel to the axis of a hollow cylindrical tube. When the tube contains only air, the light takes 8.7

mylen [45]

Answer:

1.208

Explanation:

L = Length of tube

c = Speed of light in air

v = Speed of light in jelly

Time taken by light in tube

$\dfrac{L}{c}=8.72$

Time taken when jelly is present

$\dfrac{L}{v}=8.72+1.82\\\Rightarrow \dfrac{L}{v}=10.54\ ns$

Dividing the above equations we get

$\dfrac{v}{c}=\dfrac{8.72}{10.54}\\\Rightarrow \dfrac{c}{v}=\dfrac{10.54}{8.72}\\\Rightarrow n=1.208$

The refractive index of the jelly is 1.208

4 0

3 years ago

The demand equation for the Roland portable hairdryer is given as follows where x (measured in units of a hundred) is the quanti

lesya [120]

Answer:

Explanation:

The concept of elastic and inelastic demand is applied.

for an elastic demand, the elasticity must be greater than 1 and for an Inelastic demand, the elasticity must be less than 1.

The steps and appropriate calculation is as shown in the attached file.

6 0

4 years ago