Helppp me obi-wan canobi. you are my only hope ;) hehe

Answer:

B and D

Explanation:

If it has letters.

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:

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:

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:

b

Explanation:

Answer:

40kg

Explanation:

that the answer

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]

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:

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:

the answer is letter; C

Explanation:

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:

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:

8165.138kg/cubic meter

Explanation:

Pressure= 80100 Pascal.= 1N/m^2

Height=10.2 meters

density of the fluid in kg/cubic meter= ?

g=acceleration due to gravity= 9.81m/s^2

The pressure of a system can be calculated using the expression below

P = ρ g h

Where

p =pressure,

h =depth of the liquid,

ρ = density of the liquid,

g = acceleration due to gravity.

If we substitute those values we have

80100 1N/m^2= ρ × 9.81m/s^2

ρ= 80100/9.81

ρ=8165.138kg/cubic meter

Hence, the density of the fluid in kg/cubic meter is 8165.138kg/cubic meter

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

Answer: Air resistance is "pushing" the ball upwards.

Explanation:

Answer:

yes its 25cmjdj8dnen8dnejdid

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:

This depends on the writers

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

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:

The atom is now a negative charge

Explanation:

Adding electrons makes things negative.

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:

2 m long, how wide is it? SOLUTION. Given: F = 60.0 N. W = 2.05 × 105. J x = 9.60 × 102 m. Unknown: d = ? ... moved? 3. A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s. 2 . How far up does it move? 4.

Explanation: hope this helps plz help me with my question

Answer:

6

Explanation:

Given that :

Resistance (R) = 60 ohms

Required current (I) = 0.15 ampere

Voltage (V) = current (I) * Resistance (R)

V = 0.15 * 60

V = 9v

Number of 1.5V cells required by the device :

9V / 1.5V

= 6

Hence, the device requires six 1.5V cells

Answer:

✔ convergent

Explanation:

Answer:

B ( Convergent)

Explanation:

Answer:

Sound waves in air (and any fluid medium) are longitudinal waves because particles of the medium through which the sound is transported vibrate parallel to the direction that the sound wave moves. A vibrating string can create longitudinal waves as depicted in the animation below.

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:

sign of the other charge is -ve

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