Evaporation only occurs at the surface of a liquid

The three forces shown act on a particle. what is the direction of the resultant of these three forces?

melisa1 [442]

Missing figure: http://d2vlcm61l7u1fs.cloudfront.net/media/f5d/f5d9d0bc-e05f-4cd8-9277-da7cdda3aebf/phpJK1JgJ.png

Solution:
We need to find the magnitude of the resultant on both x- and y-axis.

x-axis) The resultant on the x-axis is
$F_x = 65 N\cdot cos 30^{\circ} - 30 N - 20 N\cdot sin 20^{\circ} = 19.45 N$
in the positive direction.

y-axis) The resultant on the y-axis is
$F_y = 65 N \cdot sin 30^{\circ} - 20 N \cdot cos 20^{\circ} = 13.70 N$
in the positive direction.

Both Fx and Fy are positive, so the resultant is in the first quadrant. We can find the angle and so the direction using
$\tan \alpha = \frac{F_y}{F_x} = \frac{13.70 N}{19.45 N}=0.7$
from which we find
$\alpha=35^{\circ}$

7 0

4 years ago

Which scientist formed his ideas about living things by performing observations without using a microscope? a) Hooke b) Malpighi

UkoKoshka [18]

It was Hooke who formed his ideas about living things by performing observations without using a microscope, but it should be noted there were others as well.

7 0

3 years ago

A 20 g ball of clay traveling east at 3.5 m/s collides with a 35 g ball of clay traveling north at 2.0 m/s .

Elanso [62]

The movement direction of the resulting 55 g blob of clay 45o north of east and the speed of the resulting 55 g blob of clay is 1.8 m/s.

Calculation:-

Let us consider the east direction as the positive X-direction and the north direction as the positive Y-direction.

Mass of the first ball of clay = m1 = 20 g = 0.02 kg

Mass of the second ball of clay = m2 = 35 g = 0.035 kg

Initial velocity of the first ball of clay = V1 = 3.5 m/s to the east

Initial velocity of the second ball of clay = V2 = 2 m/s to the north

Final velocity of the blob of clay = V3

X-component of the final velocity of the blob of clay = V3x

Y-component of the final velocity of the blob of clay = V3y

By conservation of linear momentum in the X-direction,

m1V1 = (m1 + m2)V3x

(0.02)(3.5) = (0.02 + 0.035)V3x

V3x = 1.273 m/s

By conservation of linear momentum in the Y-direction,

m2V2 = (m1 + m2)V3y

(0.035)(2) = (0.02 + 0.035)V3y

V3y = 1.273 m/s

V3 = 1.8 m/s

A) Movement direction of the resulting 55 g blob of clay = 45o north of east

B) Speed of the resulting 55 g blob of clay = 1.8 m/s

Mass, in physics, quantitative measure of inertia, a essential property of all count. it's miles, in effect, the resistance that a body of rely gives to a alternate in its pace or function upon the software of a pressure. The more the mass of a body, the smaller the alternate produced with the aid of an implemented pressure.

Learn more collision here:-

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5 0

2 years ago

I WILL GIVE BRAINLIST just please help with these problems 3

statuscvo [17]

Answer:

16. 68.18 Km/h

17. 3 miles.

Explanation:

16. Determination of the speed

Distance travelled = 150 Km

Time = 2.2 hours

Speed =?

Speed is simply defined as the distance travelled with time. Mathematically, it is expressed as:

Speed = Distance / time

With the above formula, we can obtain the speed as follow:

Distance travelled = 150 Km

Time = 2.2 hours

Speed =?

Speed = Distance /time

Speed = 150 / 2.2

Speed = 68.18 Km/h

17. Determination of the distance.

Speed = 3 mph

Time = 1 hour

Distance =?

Speed = Distance /time

3 = distance / 1

Distance = 3 miles

3 0

3 years ago

What part of an atom can change during a nuclear reaction but cannot change during a chemical reaction

Dmitry [639]

<span>the number of protons and neutrons. hope this helps (:

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4 0

4 years ago

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