AP physics! Will give brainliest to correct answer!

Answer:

300 J

Explanation:

From conservation of energy;

Gravitational potential energy at top = Kinetic Energy at bottom

mgh = ½mv²

We are given;

Mass; m = 12 kg.

Height; h = 2.5 m

g = 10 m/s²

Thus;

mgh = 12 × 2.5 × 10 = 300 J

Since mgh = Kinetic Energy at bottom.

Thus; kinetic energy of the ball once it reach the ground = 300 J

Answer:

D force mass and distance

Answer:

Explanation:

the answer is C.)

The torque produced by a perpendicular force of 75 N at the end of a 0.2 m wrench is 15 Nm.

The force which causes the object to rotate about any axis is called torque. In math form, it is equivalent to the product of force and perpendicular distance.

Torque is a twisting or turning force that frequently results in rotation around an axis, which may be a fixed point or the center of mass. The ability of something rotating, such as a gear or a shaft, to overcome turning resistance is another way to think of torque.

Given:

The perpendicular force on the wrench, P = 75 N,

The length of the wrench, r = 0.2 m,

Calculate the torque of the wrench as shown below,

The torque of the wrench = r × P × sin a

Here, the force is perpendicular hence, a = 90°

The torque of the wrench = 0.2 × 75 × sin90

The torque of the wrench = 15 × 1

The torque of the wrench = 15

Thus, the torque on the wrench is 15 Nm.

To know more about torque:

https://brainly.com/question/28220969

#SPJ2

Answer:

A gas

Explanation:

Answer:

the change in momentum is 2.52 N·s

the constant force on the ball while in contact with the players foot is 126 N

Explanation:

p=momentum

m=mass

v=change in velocity

p=(0.42)(6)

p=2.52

The change in the ball's momentum is 2.52 kgms⁻¹

The constant force exerted by the players foot on the ball is 126 N

From the question,

We are to determine the change in momentum of the ball

Change in momentum calculated by using the formula,

[tex]\rho = m(v-u)[/tex]

Where [tex]\rho[/tex] is the change in momentum

[tex]m[/tex] is the mass

[tex]v[/tex] is the final velocity

and [tex]u[/tex] is the initial velocity

From the given information,

[tex]m = 0.42 \ kg[/tex]

[tex]u = 12 \ m/s[/tex]

[tex]v = 18 \ m/s[/tex]

Therefore,

Change in the ball's momentum,

[tex]\rho = 0.42 (18-12)[/tex]

[tex]\rho = 0.42 (6)[/tex]

[tex]\rho = 2.52 \ kgms^{-1}[/tex]

Hence, the change in the ball's momentum is 2.52 kgms⁻¹

For the force exerted by the players foot

Force is given by change in momentum with time

That is,

[tex]F = \frac{\rho}{t}[/tex]

Where

[tex]F[/tex] is the force

[tex]\rho[/tex] is the change in momentum

and [tex]t[/tex] is the time

From the given information

[tex]t = 0.020 \ s[/tex]

Therefore,

[tex]F = \frac{2.52}{0.020}[/tex]

[tex]F = 126 \ N[/tex]

Hence, the constant force exerted by the players foot on the ball is 126 N

Learn more on calculating change in momentum here: https://brainly.com/question/12144602

Answer:

Kinetic energy

Explanation:

The energy associated with an object's motion is called kinetic energy. A speeding bullet, a walking person, and electromagnetic radiation like light all have kinetic energy.

Kinetic energy. For example, a walking person.

Answer:

Acceleration = 1.61 m/s²

Explanation:

Given the following data:

Force = 460N

Mass = 286kg

To find the acceleration;

Force = mass * acceleration

Substituting into the equation, we have;

460 = 286 * acceleration

Acceleration = 460/286

Acceleration = 1.61 m/s²

Answer:

Sun

Explanation:

Any asteroid in space is a celestial body. Classification of Celestial Bodies. A star is a form of a celestial object made up of a shining spheroid of plasma held together by its own gravity. The nearby star to Earth is the Sun.

Answer:

the answer is 12.0

The wavelength of the water wave is 0.75 meters.

Wavelength is the distance between successive peaks or troughs of a wave. It is denoted by the symbol λ (lambda) and is measured in meters (m) or other units of length.

The wavelength of a wave determines its properties such as its energy, frequency, and speed. In general, waves with longer wavelengths have lower frequencies and travel at slower speeds, while waves with shorter wavelengths have higher frequencies and travel at faster speeds.

Here in the Question,

The relationship between the wavelength (λ), frequency (f), and wave speed (v) of a wave is given by the equation:

v = λf

We are given the speed of the water wave (v) as 3.0 m/s and the frequency (f) as 4.0 Hz.

Plugging these values into the equation, we get:

3.0 m/s = λ x 4.0 Hz

Rearranging the equation to solve for the wavelength, we get:

λ = v/f = 3.0 m/s ÷ 4.0 Hz = 0.75 m

λ   = 0.75 m

Therefore, the wavelength of the water wave is 0.75 meters.

To learn about the relationship between wave energy and amplitude click:

https://brainly.com/question/17003906

#SPJ2

Responder:

E = 1440 kJ

Explicación:

Se da que,

La potencia de un horno de cocción es de 800 W

El voltaje al que se opera es de 230 V

Tiempo, t = 30 minutos = 1800 segundos

Necesitamos encontrar la energía eléctrica utilizada por el horno de cocción. El producto de la potencia y el tiempo es igual a la energía consumida. Entonces,

Answer:

1= ionic bond

2 =covalent bonding

Explanation:

can answer the others sorry

Answer:

C. The floor pushing back against the foot​

Explanation:

Answer:a

Explanation:because I know

Answer:

B & C

Explanation:

the first block will not move

Answer:

The less mass an object has, the less its gravitational  [force.]

Explanation:

Newton's Law of Gravity states that [tex]F_G=\frac{Gm_1m_2}{r^{2}}[/tex]. The two m values are the objects' masses, G is the gravitational constant, and r is the distance between the objects' centers. Notice how the mass values are in the fraction's numerator? That means increasing the mass of one or both objects increases [tex]F_G[/tex]. That also implies the inverse; decreasing the mass of one or both objects decreases [tex]F_G[/tex]!

I hope this helps you understand this concept a little more! Have yourself a fantastic day, 'kay?

Answer:

Explanation:

It's called static equilibrium. The object is motionless and every force equals/cancels each other out

Answer:

Explanation:

The resultant would be a combination of the two forces. We need to add them together since they are exerting a force in the same direction.

10+30= 40 N of force

The man's average velocity is 73.3 mph (miles per hour).

Average velocity is a measure of the rate of displacement of an object in a given direction. It is the total displacement of the object divided by the total time taken to cover that displacement. In other words, it is the distance an object travels divided by the time it takes to travel that distance. Average velocity is an important concept in physics, as it can provide insight into the motion of an object and the forces acting upon it. Average velocity can be calculated using the equation: velocity = displacement/time.

This can be calculated by dividing the distance (55 miles) by the time (0.75 hours). Mathematically, this can be expressed as:

velocity = (distance / time)

velocity = (55 miles / 0.75 hours)

velocity = 73.3 mph

To learn more about average velocity
https://brainly.com/question/28668011
#SPJ1

Answer:

The constriction in the thermometer is to prevent the mercury from dropping back to the bulb when the reading is being taken. It is easier for us to take reading. It prevents the thermometric substance (Mercury or Alcohol) from running back into the bulb.

Explanation:

Hope it is helpful....

Answer:

constriction is made in a clinical thermometer because it prevents the thermometric liquid from running back into the bulb.

Answer:

drought, floods, rip currents, tropical cyclones, wildfires

Explanation:

right on edge

Answer:

D

Explanation:

He is storing energy to throw it.

Potential Energy = Stored Energy

Answer:

The correct answer is - puberty.

Explanation:

Sebaceous glands are the exocrine glands present in mammals that are microscopic glands, produce an oily substance, Sebum, lubricates the skin and hair follicles.

Activation of these glands is triggered twice in the developmental stage or phase, neonatal (0 to three months from birth) but the major activation of these glands when puberty hits an individual. It produces 500 percent of its normal production during the puberty phase.

Answer:

800W

Explanation:

48,000/60=800

The power rating of the hairdryer is 800W.

Power can be defined as the rate at which work is done by an object. The S.I unit of power is Watt(W).

The formula of power will be

Power = Work done/time

A hair dryer transfers 48K J of energy in one minute.

1 minute = 60 seconds

P = 48,000/60

P = 800 W

Hence, the power rating of the hairdryer is 800W.

Learn more about power.

https://brainly.com/question/15120631

#SPJ5

Answer:

D

Explanation:

Because I said so

Answer:

A swimming pool appears shallower than it really is due to the phenomenon of REFRACTION. Due to refraction, from rarer medium( Air ) to denser medium ( water ), the pool looks shallower

Explanation:

Resitance (R)= 10 Ohm

Potential difference (V) = 9V

V= IR

I= V/R

I= 9/10

I= 0.9 Ampere

Therefore 0.9 Ampere of current is flowing through the circuit.

The current through the circuit can be calculated using Ohm's law. The  current flowing through the circuit with a resistance of 10 ohm and 9 V is 0.9 ampere.

Ohm's law states that the potential difference or voltage across a circuit is the product of the current  and resistance through the circuit. Thus  as current or resistance increases, voltage across the circuit also increases.

According to Ohm's law, V= IR.

Given  the voltage V = 9 V

Resistance R = 10 ohm

Current = voltage/ resistance (V/R)

             =  9 V/ 10 Ω.

             = 0.9 A.

Therefore, the current passing  through the circuit is 0.9 A.

To find  more on Ohm's law, refer here:

https://brainly.com/question/1247379

#SPJ2

Answer:

17.3 miles

Explanation:

Answer:

the answer is 2 electrons

Explanation:

The oxygen atom has atomic number 8, therefore its electronic configuration is

         1s² 2s² 2p⁴

the sublevel s has a capacity for 2 electrons so it is full

the sublevel p has capacity for 6 electrons, as in this atom it has only 4 electrons it needs two (2) more electrons to have its full capacity and to achieve maximum stability.

Consequently the answer is 2 electrons

Answer: The guy above is correct!

Explanation: It is A. two

Answer:

the 750 j will have potential energy is 375

Explanation:

750/2 is 375