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2 years ago

NEVERMIND ANSWER FOR SOME POINTS

Physics

1 answer:

saw5 [17]2 years ago

5 0

Answer:

Answer what?

Explanation:

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g If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of th

Reil [10]

Answer:

Speed; v = 17 m/s

Explanation:

We are given;

Radius; r = 110m

Angle; θ = 15°

Now, we know that in circular motion,

v² = rg•tanθ

Thus,

v = √(rg•tanθ)

Where,

v is velocity

r is radius

g is acceleration due to gravity

θ is the angle

Thus,

v = √(rg•tanθ) = √(110 x 9.8•tan15)

v = √(288.85)

v = 17 m/s

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2 years ago

What is TRUE with regard to Bronfenbrenner's social ecological model applied to the context of relationships?

Alisiya [41]

Answer:

Sorry for waisting ur time just tryna get points :)

Explanation:

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2 years ago

If a wave has a velocity of 100m/s and a wavelength of 10m, what is the frequency?

ratelena [41]

F=2 hz i think not sure

4 0

2 years ago

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW.

Nookie1986 [14]

(a) $72.3 W/m^2$

First of all, we need to find the area of the circular spot, which is given by:

$A=\pi r^2$

where r is the radius of the spot, which is half the diameter, therefore

$r=\frac{d}{2}=\frac{2.10 mm}{2}=1.05 mm=1.05\cdot 10^{-3} m$

So, the area of the spot is

$A=\pi (1.05\cdot 10^{-3}m)^2=3.46\cdot 10^{-6} m^2$

We know that the power output of the laser is

$P=0.250 mW=2.5\cdot 10^{-4} W$

So the intensity of the laser beam is

$I=\frac{P}{A}=\frac{2.5\cdot 10^{-4} W}{3.46\cdot 10^{-6} m^2}=72.3 W/m^2$

(b) $7.8\cdot 10^{-7}T$

The average intensity of the laser is related to the peak magnetic field strength by

$I=\frac{cB_0^2}{2\mu_0}$

where

c is the speed of light

$B_0$ is the peak magnetic field strength

$\mu_0=1.257\cdot 10^{-6} H/m$ is the vacuum magnetic permeability

Solving the formula for $B_0$ , we find

$B_0 = \sqrt{\frac{2I\mu_0}{c}}=\sqrt{\frac{2(72.3 W/m^2)(1.257\cdot 10^{-6} H/m)}{3\cdot 10^8 m/s}}=7.8\cdot 10^{-7}T$

(c) 234 V/m

The relationship between magnetic field and electric field in an electromagnetic wave is

$E_0=cB_0$

where

$E_0$ is the peak electric field strength

c is the speed of light

$B_0$ is the peak magnetic field strength

Substituting numbers into the formula, we find

$E_0=(3\cdot 10^8 m/s)(7.8\cdot 10^{-7} T)=234 V/m$

7 0

2 years ago

Florida is a peninsula bound by the Atlantic Ocean on the east and the Gulf of Mexico on the west. The sea affects temperatures

Andreyy89

They are usually warmer

6 0

1 year ago