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3 years ago

A woman performs 2000 J of work in order to push a cart full of groceries 50 meters. How much force did she apply to the cart? *

Physics

2 answers:

GaryK [48]3 years ago

5 0

They will give you 4000

ad-work [718]3 years ago

4 0

They will give you 4000

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A hot-air balloon is rising upward with a constant speed of 2.85 m/s. When the balloon is 2.50 m above the ground, the balloonis

NISA [10]

Answer:

Explanation:

You have to declare which way is plus -- up or down. I will use down.

vi = - 2.85 The balloon is going up. That is the minus direction.

a = 9.81

d = 2.50 meters distance in this case is from the object to the ground.

d = vi*t + 1/2 a t^2

-2.50 = -2.85*t + 1/2 * 9.81 * t^2

-2.50 = -2.85*t + 4.905 * t^2 transfer the left to the right.

-4.905 t^2 + 2.85*t + 2.50 = 0

Use the quadratic formula to solve for t.

It turns out that t = 1.06

5 0

3 years ago

With each beat of your heart the aortic valve opens and closes. The valve opens and closes very rapidly, with a peak velocity as

Nonamiya [84]

Answer:

|Δf| = 37.3 kHz

Explanation:

given,

peak velocity = 4 m/s

speed of the sound = 1500 m/s

frequency = 7 MHz

$v = C\dfrac{\pm \dlta f}{2 f_0}$

$\delta f = \pm 2 f_0 (\dfrac{V}{C})$

$\delta f = \pm 2\times 7 (\dfrac{4}{1500})$

$=\pm 0.0373 MHz$

= 37.3 kHz

|Δf| = 37.3 kHz

hence, frequency shift between the opening and closing valve is 37.3 kHz

4 0

2 years ago

Find the difference in temperature between the water at the top and the bottom of a waterfall 100 m high.

Alekssandra [29.7K]

The answer would be 60 cuz a watetfall is a waterfall

7 0

3 years ago

Read 2 more answers

Need today please

podryga [215]

Answer:

yeah righto the correct answer mate would be D) :)

5 0

3 years ago

After driving a portion of the route, the taptap is fully loaded with a total of 26 people including the driver, with an average

Svet_ta [14]

Answer:

0.44807175m

Explanation:

k = Spring constant = $4\times 10^{4}\ N/m$ (Assumed, as it is not given)

g = Acceleration due to gravity = 9.81 m/s²

Total mass is

$m=26\times 67+3\times 15+5\times 3+25\\\Rightarrow m=1827\ kg$

The total weight will balance the spring force

$mg=kx\\\Rightarrow x=\dfrac{mg}{k}\\\Rightarrow x=\dfrac{1827\times 9.81}{4\times 10^{4}}\\\Rightarrow x=0.44807175\ m$

The springs are compressed by 0.44807175m

5 0

3 years ago