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Tju [1.3M]
3 years ago
14

100 J of work in 10 seconds

Physics
1 answer:
HACTEHA [7]3 years ago
7 0
The average power is 10 watts. What's the question ?
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Nick’s swimming goggles are made of blue plastic. When he straps them on, he notices that the goggles change the color of the ob
Liono4ka [1.6K]

A white ring buoy appears<u> blue</u> because the blue plastic <u>absorbs</u> all colors of light except blue. Only the blue light <u>reflected from</u> the ring buoy passes through the blue plastic.

3 0
3 years ago
Read 2 more answers
Two small charged spheres are located on the y-axis. One is at y = 1.00 m, the other is at y = −1.00 m, and they both have a cha
yuradex [85]

Answer:

(a) 23.946 kV

(b) -0.077 J

Explanation:

(a) The electric potential is given by the following formula:

V=k\frac{q_1}{r_1}+k\frac{q_2}{r_2}   (1)

k: Coulomb's constant = 8.98*10^9 Nm^2/C^2

q1 = q2 = 1.60*10^{-6}C

r1 and r2 are the distance from the charges to the point in which electric potential is evaluated.

Firs, you calculate the distance r1 and r2 by taking into account the position of the charges

r_1=\sqrt{(1.00)^2+(0.670)^2}m=1.20m\\\\r_2=\sqrt{(-1.00)^2+(0.670)^2}m=1.20m

Next, you replace the values of the parameters to calculate V:

V=(8.98*10^9Nm^2/C^2)\frac{1.6*10^{-6}C}{1.20m}+(8.98*10^9Nm^2/C^2)\frac{1.6*10^{-6}C}{1.20m}\\\\V=23946.66\ V=23.946\ kV

(b) The potential electric energy is given by:

U_T=U_{1,2}+U_{1,3}+U_{2,3}\\\\U_T=k\frac{q_1q_2}{r_{1,2}}+k\frac{q_1q_3}{r_{1,3}}+k\frac{q_2q_3}{r_{2,3}}\\\\r_{1,2}=2.00m\\\\r_{1,3}=1.20m\\\\r_{2,3}=1.20m\\\\U_T=(8.98*10^9)[\frac{(1.6*10^{-6})^2}{2.00m}+\frac{(1.6*10^{-6})(-3.70*10^{-6})}{1.20}+\frac{(1.6*10^{-6})(-3.70*10^{-6})}{1.20}]J\\\\U_T=-0.077J

5 0
3 years ago
A wind is blowing a small ice fishing shed along the ice to the east with a 800N force. The shed weighs 2,200N. What would the l
e-lub [12.9K]

Answer:

0.36

Explanation:

The maximum force of friction exerted by the surface is given by:

F_f = \mu N (1)

where

\mu is the coefficient of friction

N is the normal reaction

The shed's weight is 2200 N. Since there is no motion along the vertical direction, the normal reaction is equal and opposite to the weight, so

N = 2200 N

The horizontal force that is pushing the shed is

F = 800 N

In order for it to keep moving, the force of friction (which acts horizontally in the opposite direction) must be not greater than this value. So the maximum force of friction must be

F_f = 800 N

And substituting the values into eq.(1), we can find the maximum value of the coefficient of friction:

\mu = \frac{F_f}{N}=\frac{800}{2200}=0.36

6 0
3 years ago
Dx= 7.14m and Dy = -7.55m<br> What is the direction and magnitude of the vector
KengaRu [80]

The Magnitude of the Vector is 10.39m and the direction of the vector is - 46.7°.

<u>Explanation:</u>

GIven dx=7.14m and dy= -7.55m,

The Magnitude of the Vector=\sqrt{dy^{2} +dx^{2} }

Magnitude d= \sqrt{(7.14)^{2} +(-7.55)^{2} } .

                  d=\sqrt{50.97+57}

                  d=\sqrt{107.98}

                  d= 10.39m.

Direction Ф = tan^{-1}\frac{dy}{dx}

                      =tan^{-1} \frac{-7.55}{7.14}      

                      = tan^{-1}(-1.06)

                Ф    = - 46.7°.

5 0
3 years ago
You have an initial velocity of - 3.0 m/s . You then experience an acceleration of 2.5 m/s ^ 2 for 9.Oswhat is your final veloci
storchak [24]

Answer:

The final velocity of your motion is 19.5 m/s.

Explanation:

Given;

initial velocity of your motion, u = -3.0 m/s

acceleration of your motion, a = 2.5 m/s²

time of your motion, t = 9.0 s

The final velocity of your motion is calculated as follows;

v = u + at

where;

v is the final velocity

substitute the given values and solve for v

v = -3.0 + (2.5 x 9)

v = -3.0 + 22.5

v = 19.5 m/s

Therefore, the final velocity of your motion is 19.5 m/s.

4 0
3 years ago
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