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3 years ago

12

Help a girl out ?! Plz ill give brainlest

2 answers:

shepuryov [24]3 years ago

5 0

Answer:

I am pretty sure it is B.

Explanation:

I hope this helped if it didn't I am truly sorry

Rashid [163]3 years ago

3 0

Answer: A.

Explanation: If you move it from A to D look closely its a straight line.

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A person pushing a horizontal, uniformly loaded, 23.90 kg23.90 kg wheelbarrow of length ????L is attempting to get it over a ste

muminat

Answer:

The horizontal component of the minimum force is 144.24 N.

Explanation:

Given that,

Loaded = 23.90 kg

Height = 0.370 R

Where, R=wheel's radius

We need to calculate the acceleration

Using formula of acceleration

$R^2=a^2+(R-h)^2$

$a^2=R^2-(R-h)^2$

Put the value into the formula

$a^2=R^2-(R-0.370R)^2$

$a=\sqrt{0.631R^2}$

$a=0.776R$

We need to calculate the horizontal component of the minimum force

Using moment about center of point of contact

$P_{x}(R-h)=\dfrac{mg}{2}\times a$

$P_{x}(R-0.370)=\dfrac{23.90\times9.8}{2}\times0.776R$

$P_{x}=\dfrac{23.90\times9.8\times0.776R}{2(R-0.370)}$

$P_{x}=144.24\ N$

Hence, The horizontal component of the minimum force is 144.24 N.

4 0

4 years ago

WILL MARK BRAINLIEST -- The Earth’s velocity is shown by a red vector. Which best describes the Earth’s velocity?

Jlenok [28]

I would choose C. i’ve had this on my test :)

3 0

3 years ago

Planets A and B have the same size, mass, and direction of travel, but planet A is traveling through space at half the speed of

Ganezh [65]

Answer:

B. You would weigh the same on both planets because their masses and the distance to their centers of gravity are the same.

Explanation:

Given that Planets A and B have the same size, mass.

Let the masses of the planets A and B are $m_A$ and $m_B$ respectively.

As masses are equal, so $m_A=m_B\cdots(i)$ .

Similarly, let the radii of the planets A and B are $r_A$ and $r_B$ respectively.

As radii are equal, so $r_A=r_B\cdots(ii)$ .

Let my mass is m.

As the weight of any object on the planet is equal to the gravitational force exerted by the planet on the object.

So, my weight on planet A, $w_A= \frac {Gm_Am}{r_A^2}$

my weight of planet B, $w_B=\frac {Gm_Bm}{r_B^2}$

By using equations (i) and (ii),

$w_B=\frac {Gm_Am}{r_A^2}=w_A$ .

So, the weight on both planets is the same because their masses and the distance to their centers of gravity are the same.

Hence, option (B) is correct.

4 0

3 years ago

You are a meteorologist. While taking present weather observations, you note that the sky is full of wispy cirrus clouds estimat

Goshia [24]

Answer:

It will take 60 hours to pass your area

Explanation:

From the question we are told that

The the distance of wispy cirrus clouds is $d_w =6km = 6*10^3 m$

The slope is given as $S = 1:300 = \frac{1}{300}$

The speed is $v = 40km/hour$

Since the slope is 1:300 which indicates the change in the distance of the wispy cirrus clouds overhead to the distance of the warm front

Now if

1 km → 300 km

Then

$8km$ → x km

Cross multiplying and making x the subject

$x = 8 *300 = 2400 \ km$

Velocity is mathematically denoted as

$velocity(v) = \frac{Distance(d) }{Time(t) }$

Now making time the subject

$Time (t) = \frac{Distance }{Velocity}$

Now substituting values we have

$t =\frac{2400}{40}$

$= 60\ hours$

8 0

3 years ago

Only living things have energy T or F?

Angelina_Jolie [31]

Answer:

. living things only have energy : true.

8 0

3 years ago

Read 2 more answers