3 years ago

1. A car travels a distance of 200 m in 4 seconds. What is the velocity of the car?

Physics

1 answer:

dybincka [34]3 years ago

3 0

Answer:

velocity = distance / time taken

= 200/4

= 50 m/s

is the correct answer

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

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

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kykrilka [37]

Answer:

Explanation:

n = 3.00e8/2.22e8 = 1.35

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3 years ago

10%) Problem 7: Water flows through a water hose at a rate of Q1 = 620 cm3/s, the diameter of the hose is d1 = 1.99 cm. A nozzle

Semenov [28]

Answer:

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Explanation:

a) the cross-sectional area of the hose would be the square of radius times pi. And since the sectional radius is half of its diameter d. We can express the cross-sectional area A1 in term of diameter d1

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Hi there!

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The net force is equivalent to the centripetal force, so:

∑F = T

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v = √rT/m

v = 13.96 m/s

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3 years ago

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otez555 [7]

Answer:

D: unconscious

Explanation:

Apex have a nice day :)

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4 years ago