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3 years ago

Are soaps salts true or false

Physics

1 answer:

murzikaleks [220]3 years ago

3 0

true

Soaps are water-soluble sodium or potassium salts of fatty acids. Soaps are made from fats and oils, or their fatty acids, by treating them chemically with a strong alkali.

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A pump lifts 200 kg of water to a water tank placed at a height of 25m in 20 s. Find its power. g = 10 m/s² [Ans: 2500 W]

sukhopar [10]

Answer:

2500W

Explanation:

P = W/t

As we know that

W = mgh

so:

P = mgh/t

put values

P = (200)(10)(25) / 20

P = 2500W

4 0

2 years ago

The acceleration of a particle moving along a straight line is given by a = −kt2 m/s2 where k is a constant and time t is in sec

RSB [31]

Answer:

$X - Xo = 54m$

k = 1/18

Explanation:

Data:

a = -k $t^{2}$ $\frac{m}{s^{2} }$

to = 0s Vo = 12m/s

t = 6s the particle chage it's moviment, so v = 0 m/s

We know that acceleration is the derivative of velocity related to time:

$a = \frac{dV}{dT}$

rearranging...

$a*dT = dV$

Then, we must integrate both sides:

$\int\limits^f_i {dV} \, dV =-k \int\limits^f_i {t^{2} } \, dT$

$V - Vo = -k\frac{t^{3} }{3}$

V = 0 because the exercise says that the car change it's direction:

$0 - 12 = -k\frac{6^{3} }{3}$

k = 1/6

In order to find X - Xo we must integer v*dT = dX

$V - Vo = -k\frac{t^{3} }{3}$

so...

$(Vo -k\frac{t^{3} }{3})dT = dX$

$\int\limits^f_i {dX} \, dX = \int\limits^f_i {Vo -k\frac{t^{3} }{3} } \, dT$

integrating...

$X - Xo = Vot -k\frac{t^{4} }{12}$

$X - Xo = 12*6 -\frac{1}{6}* \frac{6^{4} }{12}$

X - Xo = 54m

5 0

3 years ago

An object will maintain a constant speed until a force acts on it true or false

Scorpion4ik [409]

You do not require a force to keep something moving. You only require a force to get it moving. Or to stop it moving. In your everyday experiences, something you get moving seems to come to a stop after you stop pushing it. It is because there are forces (friction) that make it stop. Without those forces, the object would just keep moving. So this would mean the answer would be True.

3 0

3 years ago

1. Which of the following would be a testable hypothesis?

Naddik [55]

B dropping a ball
C tentative and testable

7 0

3 years ago

At which SQR3 step should a student highlight important terms?

slega [8]

I think its c revising

7 0

4 years ago