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noname [10]
3 years ago
8

Which statements correctly describe laws? Check all that apply. Laws are created based on repeated experimentation. Laws are bas

ed on observations. Laws explain observations. Laws are factual statements. Laws can be changed or replaced
Physics
1 answer:
dedylja [7]3 years ago
4 0
Laws are created based on repeated experimentation
Laws are based on observations
Laws are factual statements
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Weathering weakens and breaks apart rocks. This is an example of how weathering affects the Earth’s surface.
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<span>The softer a rock's composition is the slower it will weather, the harder a rock's composition the faster it will weather. Weathering weakens and breaks apart rocks. This is an example of how weathering affects the Earth's surface. No-Till Farming and Contour Farming are two examples of preventing soil erosion.</span>
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3 years ago
A linebacker strikes a fullback with full force in a football game.The reaction force to the force of the linebacker striking th
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A. the back falls backwards to the ground
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3 years ago
A grinding wheel 0.35 m in diameter rotates at 2600 rpm .
ddd [48]

It is calculated that a)The angular velocity of the wheel is 272.13 rad/s,

b)On the edge of the grinding wheel, the linear speed is 47.62 m/s,

and c) On the edge of the grinding wheel, the acceleration is 12958.08 m/s².

Calculation of angular velocity, linear speed & acceleration:

Provided that,

the diameter of the wheel = 0.35 m

So, the radius, r = 0.35/2 = 0.175 m

As 1 revolution = 2π rad

(a)the angular velocity, ω = 2600 rpm = \frac{2600 * 2\pi }{60} rad/s

⇒ω = 272.13 rad/s

So, the angular velocity is 272.13 rad/s.

(b)The linear speed, v = r * ω

⇒v = 0.175 * 272.13

⇒v= 47.62 m/s

(c)The angular acceleration, a=\frac{v^{2} }{r}

a = \frac{(47.62)^{2} }{0.175}

⇒a = 12958.08 m/s²

Learn more about angular velocity here:

brainly.com/question/13649539

#SPJ1

6 0
2 years ago
Electric fields are vector quantities whose magnitudes are measured in units of volts/meter (V/m). Find the resultant electric f
musickatia [10]

Answer:

Er = 231.76 V/m, 27.23° to the left of E1

Explanation:

To find the resultant electric field, you can use the component method. Where you add the respective x-component and y-component of each vector:

E1:

E_1_x = 0V/m\\E_1_y=100V/m

E2:

Keep in mind that the x component of electric field E2 is directed to the left.

E_2_x= 150V/m*-sin(45) = 106.07 V/m\\E_2_y=150V/m*cos(45) = 106.07V/m

∑x: E_1_x+E_2_x = 0V/m - 106.07V/m = -106.07V/m

∑y: E_1_y + E_2_y = 100V/m + 106.07V/m = 206.07V/m

The magnitud of the resulting electric field can be found using pythagorean theorem. For the direction, we will use trigonometry.

||E_r||= \sqrt{(-106.07V/m)^2+(206.07V/m)^2} = 231.76 V/m\\\\\alpha = arctan(\frac{206.7 V/m}{-106.07 V/m}) = 117.24degrees

or 27.23° to the left of E1.

8 0
3 years ago
Mt. Everest is 29,028 feet high. How many miles is this?
Viefleur [7K]
Mount. everest is 5.499 miles 
6 0
4 years ago
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