50 kg of water at 75o C is cooled to 25o C. How much heat was given off?



a
1.05 x 105 J

b
-1.05 x 107 J

c
1.67 x 105 J

d
-1.67 x 107 J

To calculate the moment of inertia (I) of a baseball bat about its proximal end with a given mass (m) and radius of gyration (k), you can use the following formula:

I = m * k^2
Given that the mass of the baseball bat (m) is 2 kg and the radius of gyration (k) is 0.55, you can plug these values into the formula:
I = 2 kg * (0.55)²
Now, calculate the square of the radius of gyration:
(0.55)² = 0.3025
Next, multiply this value by the mass:
I = 2 kg * 0.3025 = 0.605 kg*m^2
So, the moment of inertia of the baseball bat about its proximal end is 0.605 kg*m².

Learn more about inertia here:

https://brainly.com/question/3268780

#SPJ11

☄ Universal Gravitational Constant(G)

Gravitational constant is a constant of proportionality when F(Gravitational force) is proportional to product of masses and inversely proportional to the distance between them.

The value of G (universal gravitational constant) was found out by the scientist Henry Cavendish by using the sensitive torsion balance\(.\)

━━━━━━━━━━━━━━━━━━━━

Answer:

Here is the answer. Hope this helps you!

Explanation:

Now, from Universal law of gravitation, we come to know that:

F= force of attraction

M = the object with greater mass (taken from centre of the objects)

m = object with smaller mass (taken from centre of the objects)

d = distance (taken from centre of the objects)

F ∝ Mm

F ∝ 1/d²

Therefore, we get the formula

F ∝ Mm/d²

F = GMm/d²

Here, G is the constant of proportionality. It also accepted as the Universal gravitation constant. It has a value of 6.67*10^-11 Nm^2/kg^2.

The universal gravitation constant has allowed us to use the above formula to help us calculate and come to know about

Answer:

Magnitude, direction

Explanation:

Magnitude, direction

A one-time pad is a type of encryption that is completely unbreakable if it is done correctly. It works by generating a random key that is at least as long as the message being encrypted. The key is then combined with the message using an XOR operation.

This produces a ciphertext that cannot be decrypted without the key. The key is used only once and then discarded, hence the name "one-time pad". A one-time pad is completely unbreakable because there is no pattern to the key that can be used to decrypt the message. Each character in the key is generated randomly and independently of the other characters. Therefore, the key is completely unpredictable. Even if an attacker knows the key length and has access to the ciphertext, they cannot use any techniques to decrypt it.

This is because there is no pattern to the ciphertext that can be used to determine the key.The only way to decrypt a one-time pad is to have the key. If an attacker tries to brute-force the encryption by trying all possible keys, they will generate every possible message that is the same length as the original message. This means that the ciphertext is completely meaningless without the key. It is therefore important to keep the key secret and ensure that it is only used once. ,Message: yellow stone Key: wolf To encrypt the given message using the vigenere cipher, we follow the steps below:Step 1: Write the message and key in a tabular form as shown below. To keep the process organized, we use the letters of the key to label the columns.

To know more about operation Visit;

https://brainly.com/question/13927631

#SPJ11

There's no harm done because this is really the low current there is and not many electrons transferred between you and the doorknob.

Voltage just says what is the tendency for charges to move. But it's actually the current that does harm to the body, which is the number of charges per second that move.

Electric field is the voltage or the potential difference between two points divided by the distance between them. We can solve this for V by multiplying both sides by d. So V is electric field times distance. We have electric field of about 3 times 10 to the six volts per meter when air starts to have dielectric breakdown and starts conducting and you have a spark. That's times by the separation between your finger and the doorknob which is one millimeter, which is one times 10 to the minus three meters. So the voltage must be about 3,000 volts.And in this case, there is not very many charges, and so no harm done.

Learn more about current here :

https://brainly.com/question/13076734

#SPJ4

Answer:

Explanation:

3 and 4G networks, Bluetooth, and Wi-Fi technologies. my opinions

Answer:

D

Explanation:

The event is an example of condensation is a spilled drop of rubbing alcohol disappears. Therefore, option D is correct.

Condensation is the process by which matter's physical state transitions from the gaseous to the liquid phase. Condensation, for example, occurs when water vapour (gaseous form) in the air comes into contact with a cooler surface and changes into liquid water.

Condensation is the process by which gas transforms into liquid. Morning dew on the grass, for example. Droplets of water on the outside of a cold drink bottle.

A reaction in which two or more molecules combine to form a larger molecule while losing a small molecule such as water or methanol at the same time.

Thus, The event is an example of condensation is a spilled drop of rubbing alcohol disappears, option D is correct.

To learn more about the condensation, follow the link;

https://brainly.com/question/1447093

#SPJ2

The mass of the chain is 92.55grams.

Gravity and the force from the support are the forces pulling on the chain's uncoiled sections.

Let the mass of chain be M

Mass of stick = m = 0.18kg

The balancing point shifts 17.0 cm in the direction of the other end when a short chain is suspended from one end, according to the information provided.

x= 17 cm = 0.17m

Length of stick L = 1m

Adjusting the moment of force about our pivot,

mgx - M(L/2 -x) = 0

0.18 × 9.8 ×0.17 = M(1/2-0.17)9.8

0.29988/3.24 = M

M = 0.09255

M = 92.55grams

Thus, the chain weighs 92.55 grams.

To know more about mass visit:

brainly.com/question/14481891

#SPJ4

Answer:d=80,001 m

Explanation:df = di + Vave(t)

d = 0 + 300,000,000(0.00026667)

d = 80,001 m

The characteristics of electromagnetic radiation include amplitude (brightness), wavelength, frequency, and period. We have shown that the frequency of a light wave is proportional to its energy by the equation E = h v or E=hnu

so

Radiation with a wavelength of 8.1 X 10^-8 m has the highest energy

To learn more about : Electromagnetic radiation

Ref :https://brainly.com/question/1408043

#SPJ13

Answer:

I don't know sorry' please

n is the answer I guess

not so sure

Unfortunately, it's not possible to determine the number of electrons that move through a cross section of a wire each day without additional information.

The number of electrons that move through a wire depends on various factors, including the amount of current flowing through the wire and the time for which the current flows.

Let's take an example to understand this better:Suppose a wire carries a current of 1 ampere for 1 hour.

The amount of charge that passes through the wire in this case can be determined by multiplying the current by the time:

Q = I x t = 1 A x 3600 s = 3600 C (Coulombs)

The number of electrons that pass through the wire can be determined by dividing the charge by the charge of a single electron:

3600 C / 1.6 x 10^-19 C = 2.25 x 10^22 electrons

Therefore, 2.25 x 10^22 electrons would move through the wire in this scenario. However, this value will vary depending on the current and time for which the current flows through the wire.

To learn more about electrons

https://brainly.com/question/18367541

#SPJ11

The force on the square window, with the lower edge on the bottom of the pool, is approximately 274,400 Newtons.

The density of water (ρ) is approximately 1000 kg/m³ and the acceleration due to gravity (g) is approximately 9.8 m/s². Plugging in these values, we have:

P = (1000 kg/m³) * (9.8 m/s²) * (7 m)

P = 68,600 Pa (or N/m²)

Now, to find the force exerted on the window, we need to multiply the pressure by the area of the window. Since the window is square and its side length is 2 m, the area is:

A = L²

A = (2 m)²

A = 4 m²

Finally, we can calculate the force on the window:

Force = Pressure * Area

Force = 68,600 Pa * 4 m²

Force = 274,400 N

Force is a fundamental concept in physics that describes the interaction between objects and influences their motion. It is a vector quantity, meaning it has both magnitude and direction. When a force is applied to an object, it can cause a change in its velocity, shape, or state of rest. According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass.

Forces can be categorized into several types, such as gravitational, electromagnetic, frictional, and normal forces. Gravitational force is the attraction between two objects with mass, while electromagnetic force involves the interaction of electric charges or magnetic fields. Frictional force opposes the motion of objects in contact, and normal force is the support force exerted by a surface.

To know more about Force refer to-

brainly.com/question/30507236

#SPJ4

Answer:

30×6=n

Explanation:

30 students in her class× 6 = number of students in the entire 4th grade.

Learning about the effects of sleep deprivation can provide valuable insights into the challenges faced by individuals in careers that involve regular sleep disruption, such as flight attendants, doctors working night shifts, and others.

It highlights the potential risks associated with chronic sleep deprivation, including impaired cognitive function, decreased alertness, increased risk of accidents, and negative impacts on physical and mental health. Considering these effects, it is reasonable to argue that careers involving regular sleep deprivation should be regulated in some way to ensure the well-being and safety of individuals working in these professions. Here are a few possible approaches to regulation: Establishing Maximum Work Hours: Implementing regulations that define maximum work hours per shift or per week can help prevent excessive sleep deprivation. Setting limits on consecutive working hours and ensuring sufficient rest periods between shifts can promote better sleep patterns. Adequate Rest Periods: Ensuring that individuals have sufficient time for rest and recovery between shifts is crucial. Mandating minimum periods of uninterrupted rest can help mitigate the effects of sleep deprivation and allow for sufficient sleep. Education and Training: Providing comprehensive education and training on sleep hygiene, fatigue management, and the potential consequences of sleep deprivation can increase awareness among professionals in these careers. It can empower individuals to take proactive steps to manage their sleep and prioritize their well-being. Workplace Support: Employers can play a significant role in supporting employees by implementing policies and practices that prioritize sleep health. This can include providing designated rest areas, promoting healthy sleep habits, and encouraging open communication about sleep-related concerns. Regular Health Assessments: Regular health assessments and screenings that include evaluation of sleep patterns and sleep disorders can help identify individuals who may be at risk of chronic sleep deprivation. This can allow for early intervention and appropriate support measures. Regulations should be developed through collaboration among stakeholders, including professionals in the respective fields, labor organizations, employers, and regulatory bodies. It is important to strike a balance between the needs of the job and the well-being of the individuals performing those jobs. Ultimately, the goal should be to create a work environment that recognizes the importance of sleep and takes proactive measures to mitigate the negative effects of sleep deprivation, ensuring the safety, health, and overall well-being of individuals in these careers.

Learn more about regular sleep here:

https://brainly.com/question/4515810

#SPJ11

Answer:

187.5

Explanation:

Answer:

oxygen and bromine are both highly reactive. they are also both nonmetals

To answer the given questions, let's consider each part separately:

Part (a) - Magnitude of Impulse (I):

The magnitude of impulse is equal to the change in momentum of the golf ball during the bounce. We can calculate it using the formula:

I = m * Δv

Where:

m = mass of the golf ball = 0.1285 kg

Δv = change in velocity of the golf ball during the bounce

Since the ball is dropped and then reaches a height of 2.12 m, we can find the change in velocity using the equation for gravitational potential energy:

m * g * (h2 - h) = (1/2) * m * Δv^2

Where:

g = acceleration due to gravity = 9.8 m/s^2

h = initial height = 3.2 m

h2 = final height = 2.12 m

Rearranging the equation and solving for Δv, we get:

Δv = √((2 * g * (h2 - h))

Plugging in the values:

Δv = √((2 * 9.8 * (2.12 - 3.2)) = √(-2 * 9.8 * (-1.08)) ≈ 4.019 m/s

Now, we can calculate the impulse:

I = m * Δv = 0.1285 kg * 4.019 m/s ≈ 0.5168 kg·m/s

Therefore, the magnitude of the impulse experienced by the golf ball during the bounce is approximately 0.5168 kg·m/s.

Part (b) - Magnitude of Constant Force (F):

The magnitude of the constant force acting on the golf ball during the contact with the ground can be calculated using the impulse-momentum relationship:

I = F * Δt

Where:

I = magnitude of impulse = 0.5168 kg·m/s

Δt = time of contact with the ground = 0.072 s

Rearranging the equation and solving for F, we get:

F = I / Δt = 0.5168 kg·m/s / 0.072 s ≈ 7.18 N

Therefore, the magnitude of the constant force acting on the golf ball during the contact with the ground is approximately 7.18 N.

Part (c) - Energy Transfer:

The energy transferred to the environment during the bounce can be calculated using the work-energy principle. The work done by the constant force (F) during the bounce is equal to the change in kinetic energy:

Work = ΔKE

The change in kinetic energy is given by:

ΔKE = (1/2) * m * Δv^2

Substituting the values:

ΔKE = (1/2) * 0.1285 kg * (4.019 m/s)^2 ≈ 0.413 J

Therefore, the golf ball transferred approximately 0.413 Joules of energy to the environment during the bounce.

To know more about magnitude refer here

https://brainly.com/question/31022175#

#SPJ11

When rain is falling vertically at 8m/s then the speed of the car is calculated to be 4.618 m/s.

The velocity of the raindrops adds to the velocity of the car to produce a velocity of the rain relative to the car.

As the surface becomes rougher, friction increases and on rainy days, we are more likely to slip because water acts as a lubricant between feet and the ground. Dry friction is converted to fluid friction by rainwater.  Rain drops have a uniform type of motion

Given rain is falling vertically with 8 m/s speed

and rain drop makes an angle of  30°

As we know that, tan∅ = V (horizontal) / V (vertical)

Hence,  V (horizontal)= tan ∅ *  V (vertical)

= tan (30° ) * 8

speed of the car​ = 4.618 m/s.

To know more about motion and friction, refer

https://brainly.com/question/716216

#SPJ1

Answer:

I believe that it is the 1st one

Answer:

Below

Explanation:

The two PARALLEL resistors equal:    1 / (1/16 + 1/16) = 8 Ω

V = IR        =    .7 (8) = 5.6 v

Answer:

made 72

Explanation:

X axis says any of its values should be divison by 9. So you would multiply 8and 9 which gets you 72.

\(velocity = \frac{distance}{time} \)

\( \frac{(30 + 10 + 80) \times 1000}{83 \times 60} \)

\( = 0.024m.{s}^{ - 1} \)

Answer:

a= 66/11

 =6ms^-2

A wedge is like a ramp that can work while in motion.

As a tool for raising or lowering a load, an inclined plane, also referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other. One of the six traditional simple machines that Renaissance scientists defined is the inclined plane.

Heavy loads are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending a grade.

Less force is needed to lift an object up an inclined plane than to lift it straight up, but the distance travelled is greater. Hence, a wedge is like a ramp that can work while in motion.

Learn more about ramp here:

https://brainly.com/question/13492520

#SPJ6

Answer:

The friction of braking heats up the tire and the road. The temperature is so high that it reaches the melting point of the rubber in the tire. The melting rubber is what leaves a mark on the road.

Explanation:

Answer:

the friction of braking heats up the tires and the road. then the temperature gets even hotter to the point where it melts the rubber.

Explanation:

this is my answer so be careful how you copy it, but you've got this guys schools is almost out stay strong an have fun and be safe this summer keep pushing <33.

remember you're loved by many

- Jason Edwards 5/15/23

Answer:

Convergent boundaries. When two plates collide and one is pushed over the other, forming a mountain.

Answer:

5.4

Explanation:

900/10=90 and 90(60)=5400 meters. 5400/100=5.4