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2 years ago

13

traveling at about 30 mph, how many feet will the average driver cover from the time they see the danger until they hit the brak

es

1 answer:

barxatty [35]2 years ago

5 0

Answer: 75 ft

Explanation:

Breaking distance = Speed²/ 20

= 30²/20

= 45 feet

Stopping distance = Speed + braking distance

= 30 + 45

= 75 ft

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An electron moves with a speed of 8.0×106m/s along the -z-axis. It enters a region where there is a uniform magnetic field B = (

Crazy boy [7]

Answer:

Acceleration, $a=9.36\times 10^{18}\ m/s^2$

Explanation:

It is given that,

Speed of electron, $v=8\times 10^6\ m/s$

Charge on an electron, $q=1.6\times 10^{-19}\ C$

Mass of electron, $m=9.1\times 10^{-31}\ kg$

Magnetic field, $B=5.5i-3.7j$

Magnitude, $|B|=\sqrt{5.5^2+(-3.77)^2}=6.66\ T$

Magnetic force is given by :

$F=qvB$

Also, F = ma

$a=\dfrac{qvB}{m}$

$a=\dfrac{1.6\times 10^{-19}\times 8\times 10^6\times 6.66}{9.1\times 10^{-31}}$

$a=9.36\times 10^{18}\ m/s^2$

So, the acceleration of the electron is $9.36\times 10^{18}\ m/s^2$ . Hence, this is the required solution.

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3 years ago

Darren filled ocean water, fresh water, bottled water, and tap water into four different containers. He then dropped identical g

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I would say container 1

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3 years ago

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Answer:

...do

Explanation:

24. While measuring the length of a book, the reading of the scale at one end is 5.0 cm and at the other end is 20.5

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3 years ago

A hot water heater is operated by using solar power. if the solar collector has an area of 5.3 m2 , and the power delivered by s

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Heat absorbed by the solar collector = Area*Irradiance = 5.3*995 = 5273.5 W

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Therefore;
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It will take approximately 9.92 hours.

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3 years ago

What part of a circuit has the main job of conducting the electricity?

Vesnalui [34]

The main job of conducting electricity is the power source.

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