4 years ago

Which of the following determined that cathode rays are negatively charged?

Physics

1 answer:

andrew11 [14]4 years ago

6 0

D. J.J. Thomson is your answer

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An 800 V/m electric field is directed along the +x-axis. If the potential at x = 0 m is 2000 V, what is the potential at x = 2 m

Art [367]

Answer:

400 V

Explanation:

Electric filed , E=800 V/m

$V_1=2000 V$

$x_1=0,x_2=2 m$

We know that

$E=\frac{V_1-V_2}{x_2-x_1}$

Using the formula

$800=\frac{2000-V_2}{2-0}$

$800=\frac{2000-V_2}{2}$

$2000-V_2=800\times 2=1600$

$V_2=2000-1600$

$V_2=400 V$

Hence, the potential at x=2 m=400 V

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3 years ago

If you observe an impaired driver, a safe behavior for you would be ____________.

timama [110]

Get someone else to drive me

6 0

4 years ago

How can light energy solve our real life problem?

kifflom [539]

Answer:

It gives our light which we need for probably everything.

Explanation:

4 0

3 years ago

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A spring whose stiffness is 980 N/m has a relaxed length of 0. 50 m. If the length of the spring changes from 0. 25 m to 0. 81 m

Gelneren [198K]

151.9j

Explanation:

PE=1/2kx^2

PE=1/2(980)(.50)= 245j

PE=(1/2)(980)(.81)= 396.9j

396.9- 245= 151.9j

8 0

2 years ago

It takes 120 minutes for a man to ride his bicycle up the road to Alpe d'Huez in France. The vertical height of the climb is 1,1

Greeley [361]

First solve the potential energy of the biker. using the fomula:
PE = mgh
where m is the mass of the object
g is the acceleration due to gravity ( 9.81 m/s2)
h is the height

PE = 96 kg ( 1120 m ) ( 9.81 m/s2)
PE = 1054771.2 J
then power = Work / time
P = 1054771.2 J / ( 120 min ) ( 60 s / 1 min)
P = 146.5 W

8 0

4 years ago