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3 years ago

Do u play xbox 1 bc i can play with you just need user name

Physics

1 answer:

kipiarov [429]3 years ago

3 0

Answer:

srry man or girl i dont got my user

Explanation:

i forgot my user but i play how about epic?

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A ledge on a building is 20 m above the ground. A taut rope attached to a 4.0 kg can of paint sitting on the ledge passes up ove

Andrews [41]

Answer:

t = 5.4 s

Explanation:

from the question we are given :

height (s) = 20 m

mass of paint (Mp) = 4 kg

mass of nails (Mn) = 3 kg

acceleration due to gravity (g) = 9.8 m/s^{2}

The net force accelerating the can of paint should be equal to the difference in weight of the can of paint and the can of nails.

weight of nails = mass of nails x g = 3 x 9.8 = 29.4 N

weight of paint = mass nails x g = 4 x 9.8 = 39.2 N

net force = 39.2 - 29.4 = 9.8 N

net force = total mass x acceleration

9.8 = (3 +4) x a

a = 1.4 m/s^{2}

from S = Ut + 0.5at^{2} we can get the time the carpenter has to catch the nails

where U is the initial velocity and is 0 since the can was initially at

rest

20 = (0 x t) + (0.5 x 1.4 x t^{2})

20 = 0.7 x t^{2}

t^{2} = 28.6

t = 5.4 s

8 0

3 years ago

The sun radiates about 3.6 x 10^26 Joules of energy each second. How much mass does the sun lose each second?

natulia [17]

<span> In round figures, the solar converts 700 Million plenty of Hydrogen into 695 lots of </span>

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3 years ago

A triangle ∆P QR has vertices P(3, 2, −4), Q(1, 0, −4), R(2, 1, 1). Use the distance formula to decide which one of the followin

777dan777 [17]

Answer:

a. FALSE

b.TRUE

C. FALSE

Explanation:

The formula fot the distance between two points is given as

$d=\sqrt{(x_{2}-x_{1})^{2} +(y_{2}-y_{1})^{2} +(z_{2}-z_{1})^{2}}\\$

hence we determine the distances between all the points

a.P(3,2,-4), Q(1,0,-4), R(2,1,1)

$PQ=\sqrt{(1-3)^{2} +(0-2)^{2} +(-4-(-4))^{2}}\\PQ=\sqrt{4+4+0}\\ PQ=\sqrt{8}$

For point PR

we have

$PR=\sqrt{(2-3)^{2} +(1-2)^{2} +(1-(-4))^{2}}\\PR=\sqrt{1+1+9}\\ PR=\sqrt{11}\\$

$|PQ|\neq |PR|$

B. For point RP

$RP=\sqrt{(3-2)^{2} +(2-1)^{2} +(-4-1)^{2}}\\RP=\sqrt{1+1+25}\\ RP=\sqrt{27}$

for point RQ we have

$RQ=\sqrt{(1-2)^{2} +(0-1)^{2} +(-4-1)^{2}}\\RQ=\sqrt{1+1+25}\\ RQ=\sqrt{27}$

|RP|=|R Q|

$QP=\sqrt{(3-1)^{2} +(2-0)^{2} +(-4+4)^{2}}\\QP=\sqrt{4+4+0}\\ QP=\sqrt{8}$

For point Q R

$QR=\sqrt{(2-1)^{2} +(1-0)^{2} +(1-(-4))^{2}}\\QR=\sqrt{1+1+9}\\ QR=\sqrt{11}\\$

$QP\neq QR$

6 0

3 years ago

The example of basic reserch

damaskus [11]

Answer:

A study looking at how alcohol consumption impacts the brain. A study to discover the components making up human DNA. A study accessing whether stress levels

Explanation:

For example, a scientist that tries to figure out how the body makes cholesterol, or what causes a particular disease, is performing basic scienc

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3 years ago

An unmanned spacecraft travels to Mars. Mars has a lower strength of gravity than Earth. Where in the image is the spacecraft’s

elena-14-01-66 [18.8K]

Answer:

First Dot That is located on Earth.

Explanation:

Due to Earth's gravity being greater than the moon's on earth there is more gravitational force pulling down on the spacecraft.

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4 years ago