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4 years ago

Snail 3, trying to keep up with Snail 2, managed to get to

Physics

1 answer:

Kipish [7]4 years ago

6 0

Answer:

Acceleration is the change in velocity over the change in time = Δv/Δt. To do these problems, you need to find out how much the speed changed and over what period of time it changed.

Snail 1 changes from 4 cm/min to 7 cm/min in 3 minutes. Subtract the starting velocity (4 cm/min) from the ending velocity (7 cm/min) then divide by the time (3 min):

Snail 1 = (7 cm/min. - 4 cm/min)/(3 minutes) = ? (remember to put down the units)

Snail 2 changed from 7 cm/min. down to 1 cm/min. in 3 minutes

Snail 2 = (1 cm/min. - 7 cm/min.)/(3 min.) = ? (note that the acceleration is negative when you slow down)

I hope this helps you

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An electron moving with a velocity v= 5.0 × 107 m/s i enters a region of space where perpendicular electric and a magnetic field

liq [111]

Answer:

The magnetic field that will allow the electron to go through the region without being deflected is $2\times 10^{-4}\ T$ .

Explanation:

Given that,

Velocity of the electron, $v=5\times 10^7\ m/s$

Electric field, $E=10^4\ V/m\ j$

We need to find the magnetic field that will allow the electron to go through the region without being deflected. It can be calculated as :

$qE=qvB\ \sin\theta$

Here, $\sin\theta=90^{\circ}$

$E=vB\\\\B=\dfrac{E}{v}\\\\B=\dfrac{10^4}{5\times 10^7}\\\\B=2\times 10^{-4}\ T$

So, the magnetic field that will allow the electron to go through the region without being deflected is $2\times 10^{-4}\ T$ .

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3 years ago

If you are an astronaut in the middle of the near side of the moon during a full moon,how would the ground around you look?How w

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3 years ago

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A rocket is fired in deep space, where gravity is negligible. If the rocket has a mass of 6000 kg and ejects gas at a relative v

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3 years ago

The gyri and sulci on the brain greatly increase the brain’s surface area. How do you think this increase in surface area relate

MrRa [10]

Answer:

Increase in surface area leads to more chances for connections between neurons hence more possible learning

Explanation:

The brain appears wrinkled due to the presence of gyri and sulci. Sulci are the grooves in the brain while gyri are the folds. The two major functions of gyri and sulci are to lead to formation of brain divisions and increase the surface area of cerebral cortex. The formation of brain divisions is done by creating boundaries between the brain lobes thereby leading to division of the brain into two hemispheres. Moreover, by increasing the surface area of the brain, the cortex processes more information since more neurons are formed.

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4 years ago

What is the critical angle Î¸crit for light propagating from a material with index of refraction of 1.50 to a material with inde

shutvik [7]

Answer:

The critical angle for light is 41.81 degrees.

Explanation:

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$\sin\theta_c=\dfrac{n_2}{n_1}\\\\\theta_c=\sin^{-1}(\dfrac{n_2}{n_1})\\\\\theta_c=\sin^{-1}(\dfrac{1}{1.5})\\\\\theta_c=41.81^{\circ}$

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