A 6.0-newton force and an 8.0-newton force act concurrently on a point. As the angle between these forces increases from 0 degrees to 90 degrees, the magnitude of their resultant…(1) decreases (2) increases (3) remains the same

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What is the diffrent between displesment and a distance

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DISTANCE

-length of the path between two points

-doesn't have to be a straight path

-has no direction

DISPLACEMENT

-the length from the starting point to the ending point

-must be a straight path

-must have direction (north, south, east, west, up, down)

EXAMPLE-If you wanted to know the distance from your house to the park, you could say 'three blocks north and then two blocks west' but for displacement, you could just cut through houses and backyards to get to the destination.

Hope that makes some sense :)

Displacement is the difference between two points where as distance is just a signle point.

An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn?

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Assuming this is a neutral atom, protons = electrons = atomic number
Since there are 8 positively charged particles or protons, there are also 8 electrons and that element's atomic number is 8. Neutrons is atomic mass minus atomic number which is 7 neutrons in this case.This element is therefore oxygen.

Answer:

A.) The atom has 7 neutrons and 8 protons.

Explanation:

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How many points does it take to determine a plane? one two three four

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Answer: Three

A plane requires minimum three points for its determination. These three points should be non-collinear or the third point should not lie in same line as made with any two points. By joining two points, a line is formed. A point is one dimensional.

By joining minimum three non-co-linear points, a plane can be formed.

Given three non-collinearpoints in space, they uniquely define a plane. The correct option is C.

Three-dimensional space requires at least three non-collinear points in order to establish a plane. Any additional points would also lie on the plane formed by these three points.

This is due to the fact that a plane is a two-dimensional surface that can go on forever. We define a plane that traverses all three points by joining three non-collinear points.

Their positions when combined result in a flat, continuous surface. More points would simply serve to confirm the plane's definition rather than alter it. Because of this, three points are sufficient to build a plane in three dimensions.

Thus, the correct option is C.

For more details regarding non-collinearpoints, visit:

brainly.com/question/17266012

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Your question seems incomplete, the probable complete question is:

How many points does it take to determine a plane?

A. one

B. two

C. three

D. four

[URGENT] A swimmer wants to end up at a dock due north of her starting position on the south shore of a river. In still water her maximum speed is 1.25m/s. The river has a current flowing 0.35m/s [E].a.) calculate the direction that she must aim herself through the water to arrive at the dock.

b.) how long will it take for the swimmer to cross the river, if the distance from the starting point to the dock is 300 m?

Please show all your work, thanks

Answers

a)The direction that she must aim herself through the water to arrive at the dock will be 73.7°.

b)The time it takes for the swimmer to cross the river will be 240 seconds.

What is speed?

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its si unit is m/sec.

Given data;

The maximum speed of the swimmer In still water,v=1.25m/s.

Speed of river = 0.35m/s [E]

α is the direction that she must aim herself through the water to arrive at the dock.

t is the time it takes for the swimmer to cross the river

The distance from the starting point to the dock is,s = 300 m

If the swimmer were to swim straight, the water's speed along the x-axis would have to match that of the swimmer.

$\rm v_w = v_x = 0.35 \ m/sec$

α is the angle between vx and v

The value of the

$\rm cos \alpha = (v_x)/(v) \n\n \alpha = cos ^(-1)((0.35)/(1.25) )\n\n \alpha = 73.7 ^0$

The time that the swimmer will use for reaching the dock;

s = V×t

t = s/(v)

t=300 m / 1.25 m/sec

t = 240 seconds

Hence, the direction that she must aim herself through the water to arrive at the dock. and it takes for the swimmer to cross the river will be 73.7° and 240 seconds respectively.

To learn more about the speed refer to the link;

brainly.com/question/7359669

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Explanation:

As you can see in the picture, we want the swimmer to go on a straight line, so the speed of the water must be equal to the speed of the swimmer along the x-axis. We also know the value of v, so we can calculate the of the cosine of the angle (alpha) between Vx and V. Thanks to the fundamental relation of gioniometry (cos^2(x) + sin^2(x) = 1) we can find the sine of alpha and calculate Vy. With Vy we can calculate the time that the swimmer will use for reaching the dock: s = Vy * t => t = s/(Vy).

I'll let you do all the calculations, you just have to plug in values.

Suppose a yo-yo has a center shaft that has a 0.230 cm radius and that its string is being pulled.(a) If the string is stationary and the yo-yo accelerates away from it at a rate of 1.80 m/s2, what is the angular acceleration of the yo-yo in rad/s2? rad/s2.
(b) What is the angular velocity in rad/s after 0.750 s if it starts from rest? rad/s.
(c) The outside radius of the yo-yo is 3.10 cm.What is the tangential acceleration in m/s2 of a point on its edge? m/s2

Answers

Answer:

Part a)

$\alpha = 782.6 rad/s^2$

Part B)

$\omega = 587 rad/s$

Part c)

$a_t = 24.3 m/s^2$

Explanation:

Part a)

As we know that

$a = R \alpha$

so we will have

$a = 1.80 m/s^2$

$R = 0.230 cm$

$\alpha = (a)/(R)$

$\alpha = (1.80)/(0.230 * 10^(-2))$

$\alpha = 782.6 rad/s^2$

Part B)

Angular speed of the yo-yo

$\omega = \alpha t$

so we have

$\omega = 782.6 * 0.750$

$\omega = 587 rad/s$

Part c)

Tangential acceleration is given as

$a_t = R \alpha$

$a_t = (3.10 * 10^(-2))(782.6)$

$a_t = 24.3 m/s^2$

Sound waves travel faster in: a. solids as compared to liquids. b. liquids as compared to gases. c. warm air as compared to cooler air. d. All of the above are correct.

Answers

Answer:

d all of the above are correct

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