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2 years ago

The position-time equation for a certain train is xf=2.8m+(8.1m/s)t+(2.9m/s^2)t^2.

1 answer:

3 0

The formula without numbers is
$xf = xi + vxi(t) + \frac{1}{2} (a) {t}^{2}$
do the initial velocity would be
8.1 m/s
and the acceleration would be
2.9 m/s^2

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What is the equation for frequency, wavelength, and speed of a wave?

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Answer:

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frequency=f

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Two identical twins hold on to a rope, one at each end, on a smooth, frictionless ice surface. They skate in a circle about the

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Answer:

Part a)

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Part b)

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Part c)

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Explanation:

Part a)

As we know that there is no external torque on the system of two twins

so here we will use

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Since angular momentum is conserved here as there is no external torque

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Part c)

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so we have

$W = 2(\frac{1}{2}mv'^2 - \frac{1}{2}mv^2)$

$W = m(v'^2 - v^2)$

$W = 78(8.60^2 - 4.3^2)$

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2 years ago

What is the T- test pribcipally a test of?

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3 years ago

At what speed must a 0.6 kg stone be thrown in order that it has a relativistic mass of 0.76 kg? (c = 3.00 x 10^8 m/s) (A) 0.39

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Explanation:

It is given that,

Relativistic Mass of the stone, m₀ = 0.6

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Relativistic mass is given by :

$m=\dfrac{m_o}{\sqrt{1-\dfrac{v^2}{c^2}}}$ .........(1)

Where

c is the speed of light

On rearranging equation (1) we get :

$v^2=c^2(1-(\dfrac{m_o}{m})^2)$

$v=c\sqrt{ (1-(\dfrac{m_o}{m})^2)}$

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v = 0.61378 c

v = 0.6138 c

So, the correct option is (c). Hence, this is the required solution.

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2 years ago

A solid conducting sphere with radius 0.75 m carries a net charge of 0.13 nC. What is the magnitude of the electric field at a p

Delicious77 [7]

Answer:

Explanation:

given that

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Cnet=0.13nC

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Since the radius is 0.75m

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2 years ago

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