please help
i’ll give brainlist

The dragonfly must generate approximately 4.8 × 10^-4 Joules of energy to spin itself at a rate of 1100 rpm.

Start by converting the rotational speed from rpm (revolutions per minute) to rad/s (radians per second). Since 1 revolution is equal to 2π radians, we can use the conversion factor:

Angular speed (ω) = (1100 rpm) × (2π rad/1 min) × (1 min/60 s)

ω ≈ 115.28 rad/s

The moment of inertia (I) is given as 2.0 × 10^-7 kg⋅m².

Use the formula for rotational kinetic energy:

Rotational Kinetic Energy (KE_rot) = (1/2) I ω²

Substituting the given values:

KE_rot = (1/2) × (2.0 × 10^-7 kg⋅m²) × (115.28 rad/s)²

Calculate the value inside the parentheses:

KE_rot ≈ (1/2) × (2.0 × 10^-7 kg⋅m²) × (13274.28 rad²/s²)

KE_rot ≈ 1.331 × 10^-3 J

Round the result to the proper number of significant figures, which in this case is three, as indicated by the given moment of inertia.

KE_rot ≈ 4.8 × 10^-4 J

Therefore, the dragonfly must generate approximately 4.8 × 10^-4 Joules of energy to spin itself at a rate of 1100 rpm.

For more such questions on energy, click on:

https://brainly.com/question/8101588

#SPJ8

Answer:40 miles/hour

The dependent, independent, and controlled variables​ are as follows:

1. Dependent - The effect of lime urea table salt and compost on the soil

2. Independent - The soil on which the elements are incorporated.

3. Controlled variable - The height of the plants.

The dependent variable is that which is tested in the experiment and in this experiment, Chandani is testing the effect of lime, urea, table salt, and compost on the soil.

The independent variable is the altered element in the experiment and for this experiment, this is the soil that receives different additives. Finally, the controlled variable is that which remains constant and that is the height of each plant that the researcher checks.

Learn more about independent variables here:

https://brainly.com/question/82796

#SPJ1

The relative permittivity of the insulator is εr = 1 / 2 = 0.5.

The relative permittivity of the insulator is calculated by applying the equation for the Coulomb force.

F = (kq²) / r²

where;

The initial force equation becomes;

3 = (kq²) / r²

Let's denote the relative permittivity as εr.

The new force equation becomes;

1.5 = (kq² x εr) / r²

Divide the two force equations;

(3 / 1.5) = (kq²) / (kq² x εr)

2 = 1 / εr

εr = 1/2 = 0.5

Learn more about permittivity here: https://brainly.com/question/29288724

#SPJ1

Answer:

B a current flowing through a coil of wire :)

Explanation:

The required escape velocity from the asteroid in km/s and mph is 2.0 km/s and 4478 mph, respectively.

According to analyses of orbital statistics, asteroids of 10 km in size can strike the planet every 100 My or so, which is consistent with the theory that we were struck by an object of this size 65 My ago.

Part A: Escape velocity is the bare minimum speed at which an object can break out of an astronomical body's gravitational influence. The following provides the escape velocity formula:

v = √((2GM)/r)

Where, G = gravitational constant M = mass of the astronomical body r = radius of the astronomical body

Now, let's substitute the given values to find the escape velocity from the asteroid.

Given, Diameter of the asteroid, d = 10 km

So, radius of the asteroid, r = d/2 = 5 km = 5 × 10³ m

Density of the asteroid, ρ = 3000 kg/m³

Mass of the asteroid, M = ρ × volume of the asteroid= ρ × (4/3)πr³= 3000 × (4/3) × π × (5 × 10³)³= 6.54 × 10¹¹ kg

Gravitational constant, G = 6.67 × 10⁻¹¹ Nm²/kg²

Putting all these values in the escape velocity formula, v = √((2GM)/r)= √((2 × 6.67 × 10⁻¹¹ × 6.54 × 10¹¹)/5 × 10³)= 2.0 km/s

Therefore, the escape velocity from the asteroid is 2.0 km/s.

Part B : Now, let's convert the escape velocity from km/s to mph.1 km = 0.621371192 milesSo, v in mph = 2.0 km/s × (0.621371192 miles/km) × (3600 s/hour)= 4478 mph

Therefore, the escape velocity from the asteroid is 4478 mph (rounded to three significant figures).

Hence, the required escape velocity from the asteroid in km/s and mph is 2.0 km/s and 4478 mph, respectively.

To know more about escape velocity visit:-

https://brainly.com/question/31149165

#SPJ1

Question:

You are standing on the surface of a spherical asteroid 10 km in diameter, of density 3000 kg/m3.

Part A

Calculate the escape velocity from the asteroid in km/s.

Express your answer in kilometers per second using two significant figures.

Calculate the escape velocity from the asteroid in mph.

Express your answer in miles per hour using three significant figures

sssssssssssss

Explanation:

Answer:

hello how are you

have a great day

Answer:

This refers when a spiker quickly strides towards the net before they jump in the air for an attack.

The maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water is 26.8 %

η = ( \(T_{H}\) - \(T_{C}\) ) / \(T_{H}\) * 100

η = Efficiency

\(T_{H}\) = Hottest temperature

\(T_{C}\) = Coldest temperature

Hottest temperature = Boiling point

Coldest temperature = Freezing point

\(T_{H}\) = 100 °C = 373 K

\(T_{C}\) = 0 °C = 272 K

η = ( 373 - 273 ) / 373 * 100

η = 100 / 373 * 100

η = 26.8 %

In a heat engine, the heat energy is converted into mechanical energy which will be used to do mechanical work like pushing a piston out from the cylinder.

Therefore, the maximum efficiency that a heat engine could have when operating between the normal boiling and freezing temperatures of water is 26.8 %

To know more about maximum efficiency of a heat engine

https://brainly.com/question/25289326

#SPJ1

The statements given in options A, B, and D lend support to the idea that carbon dioxide is a major cause of planetary warming.

Human activities have raised carbon dioxide content in the atmosphere by 50% in less than 200 years. The presence of carbon dioxide in the atmosphere warms the planet, thereby causing climate change and resulting in planetary warming. Based on the given options following statements support the idea that carbon dioxide causes planetary warming.

You can learn more about carbondia oxide and global warming at

https://brainly.com/question/29437871

#SPJ4

The velocity of the object of charge Q₃ will be 8109.25 m/s.

The energy an object has as a result of motion is known as kinetic energy in physics. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.

The velocity of the object  of charge Q₃ will be =

√{(2/ 10.0 × 10⁻⁸)(9 × 10⁹) × 4 × 10⁻⁶(2.0 × 10⁻⁶(1/0.01 - 1/0.02) - 2.0 × 10⁻⁶(1/0.05 - 1/0.06))}

= 8109.25 m/s.

Learn more about kinetic energy here:

https://brainly.com/question/26472013

#SPJ1

The maximum height achieved by the body is h = v√(1/2g).

The formula to find the potential energy near earth's surface is -

U = mgh

Given is to identify the maximum height to which the object will rise.

Using the energy conservation, we can write -

1/2mv² = mgh

1/2v² = gh

h = v√(1/2g)

Therefore, the maximum height achieved by the body is h = v√(1/2g).

To solve more questions on energy conservation, visit the link-

brainly.com/question/29014197

#SPJ1

The direction in which the 25 kg mass will move is to the Left. The correct option is A.

This is because the force pulling to the left is greater than that to the right.

The velocity of the mass after 1 second will be 0.4 m/s

The velocity of the mass after 2 seconds will be 0.8 m/s

The net force o the mass of 25 kg is given below:

Net force = 20 N - 10 N

Net force = 10 N

The velocity of the mass is given by the formula below:

Velocity = net force * time / mass

velocity after 1 second = 10 * 1 / 25

velocity after 1 second = 0.4 m/s

velocity after 2 seconds = 10 * 2 / 25

velocity after 2 seconds = 0.8 m/s

Learn more about net force and velocity at: https://brainly.com/question/29112524

#SPJ1

Answer:

the mouse

Explanation:

the mouse has a momentum of 33 m kg/s

while the elephant has a momentum of 27 m kg/s

i found this out using p=mv

Answer:

4m

Explanation:

you divide 20m/s by 5 seconds

Answer:

C

Explanation:

You stand on the bathroom scale and then decide to jump off and observe the

change in the reading.

Answer:

heat is the total energy of the motion of the molecules inside the object or particle, whereas Temperature is merely a measure of this energy. The relationship could be, the more heated an object is there higher the temperature the object will have.

Explanation:

Pls rate Brainliest!

The electric potential energy of the two-sphere system will be converted into kinetic energy as the spheres move away from each other. The direction of the spheres' movement will be away from each other, in opposite directions.

This is because the two positively charged spheres repel each other due to their like charges. As they move away from each other, the electric potential energy of the system decreases, while the kinetic energy of the spheres increases.

The law of conservation of energy dictates that the total energy of the system remains constant, but the energy is converted from potential to kinetic energy as the spheres move away from each other.

To know more about kinetic energy, visit:

https://brainly.com/question/26472013

#SPJ1

Answer:

B. typical number of strokes needed to complete a hole.

The bottom of a cylindrical water tank, 10 m tall and 6 m in diameter, is 25 m above the ground. According to calculations, the water pressure and force at the bottom of the tank are 343,000 Pascal and 9,685,941 Newtons, respectively.

A water pipe at ground level has the same pressure as one at the tank's base. The rate of water egress from a leak 8 metres above the ground is around 19.6 metres per second.

These calculations are based on the conservation of energy and hydrostatic principles.This pressure can also be found in a ground-level water pipe. Water will seep from a leak 8 metres above the ground at a speed of about 19.6 metres per second.

Learn more about water pressure  at :

https://brainly.com/question/32261349

#SPJ1

Answer:

Philosophy is a study that involves the nature of knowledge and truth. It serves as a guide that helps an individual seek which things are valuable and essential in life. ... It gives you a sense of direction, knowing the weight of things, therefore making you more productive.

Hence, 1344 10 3 J of heat are needed to melt the ice. From 0°C to 4°C, heating water causes it to continuously contract rather than expand.

In accordance with the U.S. Energy Statistics Administration, coal, nuclear power, and natural gas made up the majority of the country's electrical generation in 2020. Renewable energy sources like wind, hydropower, solar, biomass, and geothermal are also used to generate electricity.

Using coal and oil, nuclear energy, biomass, geothermal, & solar thermal energy, steam turbines are used to produce the majority of the world's power. Gas turbines, hydroelectric turbines, wind turbines, & solar photovoltaics are some additional significant electricity generation systems.

To know more about Energy visit:

https://brainly.com/question/1932868

#SPJ1

Let R be the radius of cylinder

\(m_a + m_b = 4 + 3 = 7kg\)

The angular velocity is 500 RPMs

\(\omega ^2 = \frac{500 * 2\pi}{60} rad/s\\N = (M_a + M_b)\omega ^2 R\)

The normal force

\(f = \mu N = (M_a + M_b) g\\\mu (M_a + M_b) \omega ^2 R = M_a + M_b\\R = \frac{1}{\mu \omega ^2 R}\\\mu_s = 0.5\\R = \frac{1}{0.5 * (\frac{500 * 2\pi}{60})^2 }\\R = 0.0073m\\R = 7.3mm\)

Since the radius is very little for two block to execute circular motion so system will slide down.

Learn more on coefficient of static friction here;

https://brainly.com/question/11841776

https://brainly.com/question/25772665

https://brainly.com/question/26400616

Answer:

ummmmm mmmmm butterflies :)

Explanation:

Answer:

It is a great stretch for athletes who play field or court sports, runners, and anyone who has tight hips or a history of groin injuries.

Its a great flexibility exercise

Explanation:

Hope that helps

Answer:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

Explanation:KKK

Answer:

Specific gravity of other fluid = .854 (Approx)

Explanation:

Given:

Mass of water = 35 g

Mass of filled bottle with water = 98.44 g

Mass of filled bottle with fluid = 89.22 g

Computation:

Mass of water = 98.44g - 35g = 63.44g

Density of water = 1000 g/L

Volume of bottle = 63.44/1000 = 0.06344L

Mass of other liquid = 89.22g - 35g = 54.22g

Density of other liquid = 54.22g/0.06344L = 854.665826 g/L

Water has a specific gravity = 1

So ,  specific gravity of other fluid

1000 / 854.665826 = 1 / specific gravity of other fluid

Specific gravity of other fluid = .854 (Approx)

(A) The spring constant of the spring is 4.94 N.

(B) The speed of the cart after pushing it is 0.47 m/s.

(C) The force applied to the cart is 0.75 N.

ω = √k/m

where;

0.5 rev/s = 0.5(2π) rad/s = π rad/s = 3.142 rad/s

ω² = k/m

k = mω²

k = 0.5 x (3.142)²

k = 4.94 N/m

E = ¹/₂kA²

where;

A is amplitude

E = ¹/₂(4.94)(0.15)²

E = 0.056 J

E = ¹/₂mv²

2E = mv²

v² = 2E/m

v² = (2 x 0.056)/(0.5)

v² = 0.224

v = √0.224

v = 0.47 m/s

E = ¹/₂FA

2E = FA

F = 2E/A

F = (2 x 0.056)/(0.15)

F = 0.75 N

Thus, the spring constant of the spring is 4.94 N. The speed of the cart after pushing it is 0.47 m/s. The force applied to the cart is 0.75 N.

Learn more about spring constant here: https://brainly.com/question/1968517

#SPJ1

Answer:

Explanation:

temperature is a scalar quantity

Answer:

Thus, the change in the weight of the person is 1.6N , option c is correct.

Explanation:

Answer:

The maximum angle does not depend on the mass

Explanation:

This is because In as much as the force acting on the normal which is the the maximum force of static friction increases as the mass increases, the component of the force of gravity parallel to the ramp increases at the same rate. Thus The maximum angle is independent of the mass.