Two boys, Shrijan having weight 600N and Shrijesh having weight
300N are playing see-saw. If Shrijan is sitting at 2m from fulcrum,
where should Shrijesh sit from fulcrum to balance Shrijan? ​

Answer:

This depends on the writers

if they want they can make spiderman deny the laws of nature

Answer:

d. Two soccer balls that are touching each other

Explanation:

Let [tex]m_1[/tex] be the mass of a tennis ball, [tex]m_2[/tex] is the mass of a soccer ball.

As the mass of a soccer ball is more than the mass of a tennis ball, so

[tex]m_2 > m_1[/tex]

Let [tex]d_1[/tex] be the distance between the centers of both the balls near each other and [tex]d_2[/tex] be the distance between the centers of both the balls touching each other.

So, [tex]d_2 > d_1[/tex]

The gravitational force, F, between the two objects having masses M and m and separated by distance d is

[tex]F=\frac{GMm}{d^2}[/tex]

Where G is the universal gravitational constant.

As, the gravitational force is directly proportional to the product of both the masses and inversely proportional to the square of the distance between them,  so selecting the larger mass ([tex]m_2[/tex], soccer ball) separated by a lesser distance ([tex]d_2[/tex], touching) to get more gravitational force.

Therefore, there will be a larger gravitational force between them when two soccer balls touching each other.

Hence, option (d) is correct.

Answer:

Two soccer balls that are touching each other

Explanation:

I got it right on the test.

Answer:

6.2 ×10^-25

Explanation:

Ma = mg

a = (m/M)g

[tex]a = \frac{0.38}{5.98 \times {10}^{24} } \times 9.8 = 6.2 \times {10}^{ - 25} [/tex]

Answer:

4.71m/s

Explanation:

Given parameters:

Distance covered  = 40.5m

Time taken  = 8.6s

Unknown:

Speed  = ?

Solution:

The speed of Samantha is the distance divided by the time taken.

  Speed  = [tex]\frac{Distance}{time}[/tex]  

 Now insert the parameters;

   Speed  = [tex]\frac{40.5}{8.6}[/tex]   = 4.71m/s

Answer: 288 m

Explanation: 288 m is the correct answer because the question states that the ball is thrown at 96 m every second, and our question tells us that the ball travels 3 seconds. This means we have to multiply 96 x 3 = 288 m.

Answer:

288

Explanation:

Answer:

the answer is letter; C

Explanation:

Answer:

12.5

Explanation:

If the half life is 25 days then in 50 days it will half twice

50/2=25

25/2=12.5

Answer:

P = 53375[W]

Explanation:

First, we must use the following equation of kinematics, which allows us to calculate the acceleration value.

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

where:

Vf = final velocity = 34 [m/s]

Vo = initial velocity = 27 [m/s]

a = acceleration [m/s²]

t = time = 6 [s]

Now replacing:

[tex]34=27+a*6\\a=1.167[m/s^{2} ][/tex]

Now we must use Newton's second law, which tells us that the sum of forces is equal to the product of mass by acceleration. In this way, we have the following equation.

ΣF =m*a

where:

F = force [N]

m = mass = 1500 [kg]

a = acceleration = 1.167 [m/s²]

[tex]F=1500*1.167\\F=1750[N][/tex]

Power is defined as the product of force by speed. But we have two speeds, the initial and the final. We must use the average speed to be able to estimate the power needed.

[tex]V_{average}=\frac{34+27}{2} =30.5[m/s][/tex]

And the power:

[tex]P=F*V_{average}\\P=1750*30.5\\P=53375[W][/tex]

Explanation:

There is a force of 3N acting towards the left and 2 forces of 4N each acting towards the right.

Net force = (4N) + (4N) - (3N) = 5N towards the right.

P.S. We subtract the 3N force because the forces are in opposite directions.

Answer:

A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.

Explanation:

hope this helped

Answer:

C.) 7.9 km

Explanation:

Distance and Displacement

An object who constantly travels for some distances at defined periods of time has a total distance as the sum of each individual distance the object traveled. It can be written as:

dtotal=d1+d2+d3+...+dn

This sum is obtained independently of the direction the object moves.

The displacement only takes into consideration the initial and final points of the path defined by the object in its moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.

Dr. Suarez walks 2.8 km north and then 5.1 km south. The total distance is simply the sum of both distances: 2.8 km + 5.1 km = 7.9 km.

Note the distance does not have any direction (north or south), it's just the number.

Answer: C.) 7.9 km

Answer:

D. 256 m/s

Explanation:

[tex]f[/tex] = Frequency of the wave = [tex]16\ \text{Hz}[/tex]

[tex]\lambda[/tex] = Wavelength = [tex]16\ \text{m}[/tex]

Speed of a wave is given by

[tex]v=f\lambda[/tex]

[tex]\Rightarrow v=16\times 16[/tex]

[tex]\Rightarrow v=256\ \text{m/s}[/tex]

The speed of the wave as it passes through the cloud of nitrous oxide is [tex]256\ \text{m/s}[/tex].

Answer:

D. 256 m/s​

Explanation:

d. d as in dog

Answer:

Their resultant force magnitude on the sleigh is approximately 583.095 N

Explanation:

The given parameters are;

The magnitude and direction in which the two reindeer-in-training pull on the sleigh are;

The force with which Connie pulls on the sleigh, F₁ = 200 N

The direction in which Connie pulls on the sleigh = 60° above the x-axis

The force with which Randolph pulls on the sleigh, F₂ = 800 N

The direction in which Connie pulls on the sleigh = 60° below the x-axis

The vector form of the force with which the two reindeer-in-training pulls the sleigh is given as follows;

[tex]\underset{F_1}{\rightarrow}[/tex] = 200 × cos(60°)·i + 200 × sin(60°)·j = 100·i + (100·√3)·j

[tex]\underset{F_2}{\rightarrow}[/tex] = 800 × cos(60°)·i - 800 × sin(60°)·j = 400·i - (400·√3)·j

The resultant force, R = [tex]\underset{F_1}{\rightarrow}[/tex] + [tex]\underset{F_2}{\rightarrow}[/tex]

∴ R = 100·i + (100·√3)·j + 400·i - (400·√3)·j = 500·i - (300·√3)·j

Their resultant force magnitude on the sleigh, [tex]\left | R \right |[/tex] = √(500² + (-300)²) ≈ 583.095 N

The direction of the resultant force = arctan(-300/500) = arctan(-0.6) ≈ -30.964 which is approximately 30.964° below the x-axis.

Answer:

No. of electrons = 88

Explanation:

Given that,

No. of protons = 88

No. of neutrons = 226

We need to find the number of electrons it have in a radium atom.

In an atom, the number of protons is equal to the number of electrons. There are 88 protons in this case.

Hence, there are 88 electrons in the radium atom.

Answer:

Sodium chloride, regular table salt, is also known as the mineral halite.

...

Follow-Up Questions:

Find sodium and chlorine on The Periodic Table of the Elements. ...

NaCl is known as an ionic compound. ...

Chlorine is known as a diatomic molecule.

Answer: A  a mechanical wave travels through empty space, while an electromagnetic wave travels through matter.

Explanation: A mechanical wave travels through empty space, while an electromagnetic wave travels through matter. A mechanical wave has a short wavelength, while all electromagnetic waves have long wavelengths.

Answer:

DP = 56 [kg*m/s]

Explanation:

We know that momentum is defined by the product of mass by Velocity. In this way by means of the following equation, we can calculate the impulse.

[tex]P=m*v\\[/tex]

where:

P = momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Now replacing:

[tex]P=8*9\\P=72[kg*m/s][/tex]

And after the ball hits the wall:

[tex]P_{2}=8*2\\P_{2}=16[kg*m/s][/tex]

The change in momentum is equal to:

[tex]DP=72-16\\DP = 56 [kg*m/s][/tex]

Answer:

✔ convergent

Explanation:

Answer:

B ( Convergent)

Explanation:

Answer:

P = 5400[W]

Explanation:

We must use the following equation of kinematics to calculate the acceleration.

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

where:

Vf = final velocity = 9 [m/s]

Vo = initial velocity = 0 (starting from rest)

a = acceleration [m/s²]

t = time = 1.5 [s]

[tex]9=0+a*1.5\\a=9/1.5\\a=6[m/s^{2} ][/tex]

Now with this second equation of kinematics, we can determine the distance traveled.

[tex]v_{f}^{2}=v_{o}^{2}+2*a*x[/tex]

where:

x= distance [m]

[tex]9^{2} = 0 +2*6*x\\12*x=81\\x=6.75[m][/tex]

Now we must use Newton's second law which tells us that the sum of forces is equal to the product of mass by acceleration.

∑F = m*a

Now replacing:

[tex]F=100*6\\F=600[N][/tex]

Ahora la potencia se puede calcular por medio del producto de la fuerza por velocidad.

[tex]P=F*v[/tex]

where:

P = power [W]

F = force = 600 [N]

v = velocity = 9 [m/s]

[tex]P=9*600\\P=5400[W][/tex]

Answer:

The force of gravitational will decreases by a factor of 4

Explanation:

The given parameters are;

The symbol that represents the given mass = m

The mass of the circular ring = M

The initial distance of the mass "m" located at the point P from the center O = h

The final distance of the mass "m" when moved further away from point O = 2·h

Given that h = r, we have;

[tex]The \ initial \ gravitational \ force, F_1 =G \cdot \dfrac{M \cdot m}{r^{2}}[/tex]

Therefore, when OP = 2·h, we have;

OP = 2·r and the new gravitational force, F₂, is given as follows;

[tex]F_2 =G \cdot \dfrac{M \cdot m}{(2\cdot r)^{2}} = G \cdot \dfrac{M \cdot m}{4\cdot r^{2}} = \dfrac{1}{4} \times G \cdot \dfrac{M \cdot m}{r^2} = \dfrac{1}{4} \times F_1[/tex]

[tex]\therefore F_2 = \dfrac{1}{4} \times F_1[/tex]

Therefore, when the mass, m, is removed such that OP = 2h, the value of the gravitational force decreases by a factor of 4.

Answer:

b

Explanation:

Answer:

Distance 50m

final velocity 20ms^-1

[tex]s = ut + \frac{1}{2} a {t}^{2} \\ = 0 \times t + \frac{1}{2} \times 4 \times {5}^{2} = 50m[/tex]

[tex]v = u + at \\ v = 0 + 4 \times 5 \\ v = 20ms^{ - 1} [/tex]

Answer:

2990W

Explanation:

Given parameters:

Voltage  = 230V

Current = 13A

Unknown:

Maximum power it can safely use  = ?

Solution:

To solve this problem;

       Power  = Current  x Voltage

     Power  = 230 x 13  = 2990W

Answer:

Question: Find out more about either one of these forms of energy

Answer:

Solar energy: This is energy generated from the sunlight, and it can be converted to other energy that can be useful. Solar energy from the sun considered a clean source of electricity can be converted to a usable electricity source or stores the light in batteries for thermal use. This energy conversion is possible through the use of solar panels attached to where the conversion would take place so as to capture the light from the sun.

Question: What is being done to make it a more efficient source of energy

Answer:

1. When using solar energy to power homes, it is more efficient to have panels on a green roof because of the characteristics of this roof not to reflect or lose more light from the sun.

2. Improvements on the type of solar cell to use for instance that are cheaper and could maximize the energy from the sun are all ways that make it more efficient.

3. Since solar panels don't produce energy at night, usage of batteries that could store electricity during the day or when the sun is not obscured would make solar more efficient.

Question: where it is being used in the United States?

Answer:

1. California

2. Nevada

3. New York

4. Texas

Answer:

40kg

Explanation:

that the answer

Answer:

B and D

Explanation:

If it has letters.

Answer:

decreases by 2

Explanation:

The angular speed of the ferris wheel decreased by a factor of 2.

The angular speed of an object is the rate of change of angular displacement with time.

v = ωr

[tex]r = \frac{\omega }{v} \\\\\frac{\omega_1 }{v_1} = \frac{\omega_2 }{v_2} \\\\\omega_2 = \frac{\omega _1 v_2}{v_1} \\\\\omega _2 = \frac{\omega _i \times v}{2v} \\\\\omega _2 = \frac{1}{2} (\omega _1)[/tex]

Thus, the angular speed of the ferris wheel decreased by a factor of 2.

Learn more about angular speed here: https://brainly.com/question/6860269