A force of 30 newtons and a force of 20 newtons act
concurrently on an object. Which of the following
resultant forces could be produced using these two
forces?

Answer:

The speed of 1 kg ball is 3 times of the speed of 9 kg ball.

Explanation:

It is given that, 1 kg ball and 9 kg ball have the same kinetic energy.

We need to compare their speeds.

The kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2[/tex]

Where

m is mass and v is speed

As kinetic energy is same. So,

[tex]m_1v_1^2=m_2v_2^2\\\\\dfrac{v_1^2}{v_2^2}=\dfrac{m_2}{m_1}\\\\\dfrac{v_1^2}{v_2^2}=\dfrac{9}{1}\\\\\dfrac{v_1}{v_2}=\dfrac{3}{1}\\\\v_1=3v_2[/tex]

So, the speed of 1 kg ball is 3 times of the speed of 9kg ball.

Answer:

Explanation:

The power of the crane can be found by using the formula

[tex] p = \frac{ \orange{w}}{ \orange{t}} \\ [/tex]

w is the workdone

t is the time taken

From the question we have

[tex]p = \frac{5600}{2.8} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

The atomic mass of an element is the average mass of the atoms of an element, according to google. Sum of protons and neutrons in nucleus is the mass number and multiply by 1 amu gives you the mass of the atom

Answer:

D is the correct answer

Explanation:

solid is a new substance, and it's called a precipitate.

The precipitate formation is occurred when a solid forms out of mixing two liquids. Hence, precipitate formation is the correct option.

The given problem is based on the chemical reactions and substances formed due to the chemical reactions. The given question says that some solid substance forms out of mixing two liquid substances in a chemical reaction. Now, let us analyze the options:

Thus, we can conclude that precipitate formation is occurred when a solid forms out of mixing two liquids.

Learn more about the precipitate formation here:

https://brainly.com/question/19487269

Answer:

1. The force of gravity, g = 9.8 m/s2 Gravity accelerates you at 9.8 meters per second per second. ...

2. Time to splat: sqrt ( 2 * height / 9.8 ) ...

3. Velocity at splat time: sqrt( 2 * g * height ) ...

4. Energy at splat time: 1/2 * mass * velocity2 = mass * g * height.

Explanation:

Answer:

We get mater to grow by eating food, drinking water and breathing in oxygen

Explanation:

Growing shows an increase in size or mater of a living organism over time, such that the present state of a living organism has an increased amount of matter or inertia than its previous status.

However, by the law of conservation of mater, the amount of mater in a closed system is constant, therefore, we have that for us to grow, new mater must be ingested, which comes from what we take into our bodies

Therefore, we get mater to grow by eating food, drinking water and breathing in oxygen

Answer:

False

Explanation:

In the question it is given that a proton travels in the right moves in between the two plates. An electric field that is pointing in the vertically upward direction has magnitude of 3 N/C. The electric field is produced by the plates.

Now from here we can conclude that the direction of the force acting on the proton when the proton is in between the plates acts in the downward direction. While the electric field lines points in the upward direction. Thus the electric point will not be in the direction of the force that acts on the proton.

Answer:

Explanation:

Taking moment of forces about the hinge ,

moment of weight of man = 800 x p where p is his distance of man from hinge , in clockwise direction .

moment of tension force in rope in anticlockwise direction

= 500 x 3

For rotational balancing

800 x p = 500 x 3

p = 1.875 m .

From the principle of moment, the distance of the man from P is 1.9 m

From the question, below are the given parameters;

As the man walks toward the string, the tension on it will act downward, while the normal reaction on the man will act upward.

From the principle of moment,

Clockwise moment = anticlockwise moment

Let us take our moment from point P. That is,

500 x 3 = 800 x d

Make d the subject of formula

d = 1500 / 800

d = 1.875 m  

Therefore, the distance of the man from P when the tension in the rope at Q becomes equal to 500N is 1.9 meters approximately.

Learn more about moment here: https://brainly.com/question/6278006

Answer:

Whats a rahul?

Explanation:

I'll edit this once I know :)

Answer: its B

Explanation: just took the quiz

Answer:

the line b aka the option d

Explanation:

Answer:

solar system is the first blank

Answer:

atmosphere; solar system; rotations; energy; features; surface; solid; measurements

Explanation:

To be honest there really isn't an explanation. Hope this helps!

Answer: There is nothing here

Explanation: Could you please add a picture or something

Answer:

2500 kg

Explanation:

m=p/v

?=10000kgm/s/4m/s

?=2500 kg

Answer:

v_{f}=21.75[m/s] (velocity just before it lands)

t = 2.98 [s]

Explanation:

The key to solving this problem is the initial velocity since when the camera falls it is moving up, we will take this velocity as negative and the acceleration gravitation down as positive.

We will use the following equation of kinematics to solve this problem.

[tex]V_{f}^{2} =V_{o}^{2}+2*g*y[/tex]

where:

Vf = final velocity [m/s²]

Vo = initial velocity = 7.5 [m/s]

g = gravity acceleration = 9.81 [m/s²]

y = elevation = 27 [m]

[tex]v_{f}^{2} = - (7.5)^{2} +(2*9.81*27)\\ v_{f}^{2} = 473.5\\v_{f}=\sqrt{473.5}\\v_{f}=21.75[m/s][/tex]

Now using the following equation of kinematics, we can calculate the time that the fall lasts.

[tex]v_{f}=v_{o}+g*t[/tex]

[tex]21.75 = -7.5 +9.81*t\\9.81*t = 29.25\\t = 2.98[s][/tex]

Answer:

Explanation:

A turbine is a mechanical device that can be used for the conversion of one form of energy into another.

The boiled water generates thermal energy which is blown against a huge turbine blades. The thermal energy is converted to mechanical energy (which drives the blades of the turbine), and sound energy in the turbine. The spinning blades thereby cut the magnetic field as they rotates inducing electric current (Fleming's left hand rule), thus electrical energy is produced.

The electrical energy is now converted to light energy and heat energy by the lamp.

Answer:

t = 3.35 s

Explanation:

It is given that,

Mass of a pumpkin, m = 8 kg

It is dropped from a height of 55 m

We need to find the time taken by it to hit the ground.

Initial velocity of the pumpkin, u = 0

Using second equation of motion to find it as follows :

[tex]h=ut+\dfrac{1}{2}at^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2(55)}{9.8}} \\\\t=3.35\ s[/tex]

So, it will take 3.35 seconds to hit the ground.

Answer:

I love your pfp also! Put the image i put in full screen and theres your answer

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Answer:

22

Explanation:

Answer:

D

Explanation:

I might be wrong but if I was you i would go with D

Answer:

I think it's part c . but sorry if its wrong

Answer:

Equilibrium

Explanation:

An object is in equilibrium when the vector sum of the force acting on the object is equal to zero.

A body in equilibrium is at state of rest of rest or in motion with no external force acting on it.

Answer:

Acceleration = 3m/s^2

Vf= 0  Vi =35m/s   t= 13s

Explanation:

[tex]Acceleration = \frac{Change in velocity}{Change in time}\\ = \frac{35m/s}{13s}\\ a = 2.69m/s^2\\ a = 2.7m/s^2\\ a = 3m/s^2[/tex]

Answer:  don´t know

Explanation:

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Answer:

29.4 N

Explanation:

F = ma

F = (3 kg) (9.8 m/s²)

F = 29.4 N

Answer:

100 meters

Explanation:

d=at^2 correct? So you plug in acceleration and time. d=(4)(5)^2 which when using pemdas turns out to 100 meters.

Answer:

Energy materials are traditionally made with a linear approach—materials are taken, products are made, and when they expire or break, they are disposed of. The process repeats.

Explanation:

This may help I don't know

Answer:

13

Explanation:

13.0120481928 it is the distance