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3 years ago

Write the difference between distance and displacement

1 answer:

7 0

In order to determine distancetraveled, you must measure the length of the entire path taken by the object. ... Distance is a scalar quantity. Displacement is an object's change in position, only measuring from its starting position to the final position.

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EastWind [94]

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4 years ago

What is the wavelength of a 25 Hz wave traveling at 35m/s?

Lelechka [254]

1.4 is the answer :)

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3 years ago

Use Newton’s method to solve the equation0 =12+14x2−xsin(x)−12cos(2x),withx0=π2.Iterate using Newton’s method until an accuracy

Charra [1.4K]

Answer:

given function is

$f(x)=12+14x^2-xsin(x)-12cos(2x)$

$x_{0} =\pi ^2$

formula for newton's method is

$x_{n+1} =x_{n} -f(x_{n})/f'(x_{n} )$

so derivative of function is

$f'(x)=28x-sin(x)-xcos(x)+24sin(2x)$

now put values and solve

or you can also use MATLAB code to solve

i.e

function p= newton(x)

e=0.001;

for i=1:100

if abs(d(x))>e

if abs(k(x))>0

xm=x-(k(x)/d(x));

x=xm;

else

end

break;

end

disp(x)

disp(k(x))

return;

7 0

3 years ago

Give reasons why we cannot hear the sound from the space?

Tanya [424]

Because air does not exist in space

5 0

3 years ago

Fig. 2.1 shows a train

Vitek1552 [10]

Answer:

$\mathrm{(a)\:}32,000,000\:\mathrm{Ns},\\\mathrm{(b)\:}390,000\:\mathrm{N}$

Explanation:

The impulse-momentum theorem states the impulse on an object is equal to the change in momentum of that object. Momentum is given by $p=mv$ . Since mass is constant, the train's change in momentum is:

$\Delta p=m\Delta v=750,000\cdot42=31,500,000=\fbox{$32,000,000\:\mathrm{Ns}$}$ (two significant figures).

Impulse is also given as $\Delta p = F\Delta t$ , where $F$ is the average force applied and $\Delta t$ is change in time. Since $t$ is given as $80\mathrm{s}$ , we have the following equation:

$F\Delta t=\Delta p\\\\F=\frac{\Delta p}{\Delta t},\\\\F=\frac{31,500,000}{80},\\\\F=393,750=\fbox{$390,000\:\mathrm{N}$}$ (two significant figures).

7 0

3 years ago