19) For the mercury in a thermometer to expand from 4.00 cm3 to 4.10 cm3, what change in temperature is necessary? The mercury has a volume expansion coefficient of 1.80 × 10-4 K-1.
A) 400 C°
B) 140 C°
C) 14 C°
D) 8.2 C°

The final temperature of the mixture of 50 g lead and 75 g water is (B) 6.8°C.

         To solve the problem, we can use the formula:

(m1 x c1 x ΔT1) + (m2 x c2 x ΔT2) = 0

where m is the mass, c is the specific heat, ΔT is the change in temperature.We know that the initial temperature of lead is 100°C and the initial temperature of water is 0°C. We assume that the final temperature of the mixture is T. Also, the final temperature of lead and water must be equal.Using the formula, we can solve for T:

(50 g) x (0.11 kcal/kg ∙ C°) x (100°C - T) + (75 g) x (1.0 kcal/kg ∙ C°) x (T - 0°C) = 0

Solving for T, we get:

T = 6.8°C

Therefore, the final temperature of the mixture is 6.8°C.

To learn more about temperature:

https://brainly.com/question/11464844

#SPJ11

In the case where a supernova remnant core has a mass greater than 2.8 solar masses, the force that can stop gravity from collapsing the core is neutron degeneracy pressure.

When the core of a star has a mass exceeding 2.8 solar masses, it is too massive for electron degeneracy pressure to support it. Instead, the core collapses further, and protons and electrons combine to form neutrons. The neutrons then exert a pressure called neutron degeneracy pressure, which can counteract the gravitational collapse of the core.

For a supernova remnant core with a mass greater than 2.8 solar masses, neutron degeneracy pressure is the force that can stop gravity from collapsing the core.

To know more about supernova, click here

https://brainly.com/question/29172431

#SPJ11

Organizational inertia is the tendency of an organization to remain in its current state, instead of adapting to changing external conditions.

Organization is the process of structuring, planning, and managing the activities and resources of an entity, such as a business, charity, or government, in order to achieve a specific goal. It is the structure of relationships and tasks that help coordinate and direct the actions of individuals and groups towards the achievement of shared objectives.

It is often the result of a successful period, when the organization has met its goals and has become comfortable with its current strategies, processes, and structures. The organization is reluctant to make changes, even when faced with external pressures such as new technologies, shifting customer demands, or competitive threats.
Organizational inertia can be seen in the patterns of successful organizations. These organizations often follow a predictable path: they start out small and nimble, able to quickly adapt to changes in their environment. As the organization grows, it begins to introduce more formal processes and structures, such as hierarchies and rules. These processes and structures can be beneficial in helping the organization grow, but they also make it harder for the organization to adapt to changes. Over time, the organization becomes increasingly rigid and resistant to change, leading to organizational inertia.

To learn more about organization
https://brainly.com/question/1288780
#SPJ4

Complete Question:
organizational inertia is often the result of success in a particular market during a particular time. the pattern for successful firms often follow a particular path: __________

The pressure is 12.31 atmospheres when the volume is decreased to 90 liters and the temperature is increased to 330 degrees K.

An atmosphere is a layer of gases that surround a planet or other celestial body. It is held in place by the planet's gravity and is composed of a variety of gases. Earth's atmosphere is composed mostly of nitrogen (78%) and oxygen (21%), and it is responsible for maintaining the planet's temperature and weather patterns.

V = kT/P
where k is a constant.
We can also create an equation using the given information:
120 = k(310)/18
We can solve for k by multiplying both sides by 18:
2160 = k(310)
We can solve for k by dividing both sides by 310:
k = 6.96774
We can use the equation V = kT/P to solve for P when V is 90 liters and T is 330 degrees K:
90 = 6.96774(330)/P
We can solve for P by multiplying both sides by P:
90P = 6.96774(330)
We can solve for P by dividing both sides by 6.96774(330):
P = 12.31 atmospheres
Therefore, the pressure is 12.31 atmospheres when the volume is decreased to 90 liters and the temperature is increased to 330 degrees K.

To learn more about atmospheres
https://brainly.com/question/13265242
#SPJ4

The phase difference between the two waves arriving at a point 0.56cm from the center line is 0.845 radians.

To determine the phase difference between two waves arriving at a point 0.56cm from the center line in a double-slit experiment, we can use the following formula:

phase difference = (2π/λ) * d * sinθ

Where λ is the wavelength of light, d is the distance between the two slits (also known as slit spacing), θ is the angle between the center line and the point of interest, and 2π is the constant value of a full cycle.

Given the values in the question, we can plug them into the formula:

λ = 490nm = 4.9 x 10⁻⁷ m
d = 0.032mm = 3.2 x 10⁻⁵ m
θ = sin⁻¹ (0.56cm/1.6m) = 0.210 radians

Now we can solve for the phase difference:

phase difference = (2π/4.9 x 10⁻⁷) * 3.2 x 10⁻⁵ * sin(0.210)
phase difference = 0.845 radians

Therefore, the phase difference between the two waves arriving at a point 0.56cm from the center line is 0.845 radians.

To know more about waves, refer

https://brainly.com/question/1968356

#SPJ11

According to the question, the corresponding temperature in the Kelvin scale is 2296 K.

Temperature is a measure of the amount of thermal energy present in a physical system. It is the average kinetic energy of all the particles in a system and is typically measured in degrees Celsius (°C), Fahrenheit (°F), or Kelvin (K). The hotter a system is, the more kinetic energy the particles possess and the higher the temperature. The colder a system is, the less kinetic energy the particles possess and the lower the temperature. Temperature is an important factor in many physical, chemical, and biological processes, and can be affected by external factors such as heat transfer, humidity, and atmospheric pressure.

To convert from Fahrenheit (°F) to Kelvin (K), subtract 459.67 from the temperature in °F and then divide by 1.8. Therefore, 3215°F - 459.67 = 2755.33, and 2755.33 / 1.8 = 1530.1833 K, which can be rounded to 2296 K.

So, D is the right answer.

To learn more about temperature

https://brainly.com/question/30459668

#SPJ4

If the second launch has a greater relative projection height, then the range of the projectile will increase.

When a projectile is launched, its range is dependent on its initial velocity, projection angle, and relative projection height. The greater the relative projection height, the longer the projectile remains in the air, allowing it to travel farther. Therefore, if all other conditions are the same, increasing the relative projection height of the second launch will result in a longer flight time and a greater range for the projectile.

In summary, if the second launch of a projectile has a greater relative projection height, the range of the projectile will increase due to the longer flight time allowed by the increased height.

To know more about projectile, visit;

https://brainly.com/question/8104921

#SPJ11

To solve this problem, we can use the following formula for linear thermal expansion:

ΔL = α L ΔT

where ΔL is the change in length, α is the coefficient of linear thermal expansion, L is the original length, and ΔT is the change in temperature.

We are given the original length L = 200 m, the coefficient of linear thermal expansion α = 12 × 10^-6 K^-1, and the change in temperature ΔT = -20 °C (since the temperature drops from 20 °C to 0 °C).

Substituting these values into the formula, we get:

ΔL = (12 × 10^-6 K^-1) × (200 m) × (-20 °C)

ΔL = -0.048 m

Therefore, the length of the steel cable will decrease by 0.048 meters (or 4.8 cm) when the temperature drops from 20 °C to 0 °C. The final length of the cable will be:

L_final = L + ΔL = 200 m - 0.048 m = 199.952 m

To know more about Celsius please visit

https://brainly.com/question/31840122

#SPJ11

The owner of the stack of notebooks is Sofia, but we do not have enough information to identify the owner of the modello.

To identify the owner of each object, we need to look for any personal information or belongings associated with the object. In the case of the stack of notebooks, we can assume that they belong to Sofia since her name is mentioned in the question. Therefore, the owner of the stack of notebooks is Sofia.

For the modello, we would need more information to determine the owner. Is there any identifying information on the modello itself or nearby? Without more context, we cannot identify the owner of the modello.

In summary, the owner of the stack of notebooks is Sofia, but we do not have enough information to identify the owner of the modello.

Learn more about Sofia here,

https://brainly.com/question/3372655

#SPJ11

To find the key value 27, the search interval after the first pass through the while loop will be a[2] ... a[6].

To find the key value 27, we need to perform a binary search on an array of elements. In a binary search, we divide the search interval in half repeatedly until we find the key value or determine that it does not exist in the array.

The search interval after the first pass through the while loop depends on the value of the middle element in the array and whether it is greater than or less than the key value. If the middle element is greater than the key value, then the search interval is the left half of the array. If the middle element is less than the key value, then the search interval is the right half of the array.

Let's consider the given answer choices:

a[5] ...a[6]
a[6] ...a[7]
a[4] ...a[7]
a[2] ...a[6]
a[0] ...a[7]

We don't know the values of the elements in the array, so we cannot determine the search interval based on their values. However, we can determine the search interval based on the indices of the elements.

Assuming that the array has eight elements (i.e., a[0] through a[7]), the search interval after the first pass through the while loop will be a[0] ...a[7]. This is because we haven't compared the middle element (a[3]) to the key value yet, so we cannot determine whether the key value is in the left or right half of the array.

After comparing a[3] to the key value, we will determine whether the search interval is a[0] ...a[2] or a[4] ...a[7]. We will continue to divide the search interval in half until we find the key value or determine that it does not exist in the array.

The search interval after the first pass through the while loop will be a[0] ...a[7]. However, the search interval will change as we perform additional passes through the while loop and divide the array in half based on the values of the elements.

To find the key value 27, the search interval after the first pass through the while loop will be a[2] ... a[6].

To know more about key value, refer

https://brainly.com/question/31391106

#SPJ11

The main answer to your question is that the average time between civilizations is about 50,000 years.

This can be calculated by dividing the total time of 5 billion years by the number of civilizations, which is 100,000.

To provide an explanation, this calculation assumes that civilizations arise randomly and independently throughout the galaxy.

However, it is important to note that this is a hypothetical scenario and the actual frequency of civilizations in the galaxy is unknown.

In summary, if we assume that 100,000 civilizations have arisen in our galaxy at random times in the past 5 billion years, the average time between civilizations is estimated to be 50,000 years.

Learn more about civilizations click here:

https://brainly.com/question/13403112

#SPJ11

Some properties of a magnetic field include that every current has a magnetic field, every moving charge has a magnetic field, and the magnetic field of a wire is in the form of concentric circles with a north pole and a south pole. Additionally, a coil of wire with a current can act like a compass and align with a magnetic field.

Some properties of a magnetic field include the following: every current has a magnetic field, every moving charge has a magnetic field, and the magnetic field of a wire is concentric circles. A coil of wire with a current is not commonly called a compass, but rather an electromagnet.

Additionally, the magnetic field of a wire does not have a distinct north and south pole like a bar magnet, but its direction can be determined using the right-hand rule.

To know more about magnetic field visit:-

https://brainly.com/question/14848188

#SPJ11

At the moment the car is at the north end of the circle and slowing down, the acceleration vector points to the south.

When an object moves in a circular path at a constant speed, it is still accelerating because its direction is changing. This acceleration is called centripetal acceleration and it always points towards the center of the circle. When the car is slowing down at the north end of the circle, its velocity vector is still pointing towards the east or west direction (tangent to the circle). Therefore, the acceleration vector must be pointing towards the center of the circle, which is south of the car. This is because the centripetal acceleration vector always points towards the center of the circle and is perpendicular to the velocity vector.

To learn more about acceleration:

https://brainly.com/question/30660316

#SPJ11

The time between the arrival of the p-wave and s-wave becomes greater because the s-wave travels slower than the p-wave. This is because the s-wave travels through solid material, which is denser than the material through which the p-wave travels.

As a result, the s-wave encounters more resistance and travels at a slower speed. This delay in the arrival of the s-wave compared to the p-wave is used by seismologists to calculate the distance between the earthquake epicenter and the recording station, which is an important factor in earthquake detection and monitoring.
                                  The time between the arrival of the P-wave and S-wave becomes greater due to the difference in their velocities and the increasing distance from the earthquake's epicenter. P-waves travel faster than S-waves, so they arrive first at a seismic station.

                                        As the distance from the epicenter increases, the time difference between the arrival of these waves also increases. This is because the P-wave and S-wave are covering a longer distance, and their difference in speed becomes more noticeable over a larger distance, leading to a greater time gap between their arrivals.

Learn more about P-waves

brainly.com/question/29334933

#SPJ11

The spring constant (k) is 0.192 N/m, and the maximum compression of the spring (x) is 0.26 m.


1. To find the spring constant, we need to first determine the force exerted on the glider by the spring (F_spring) during the 1.3 seconds contact time. We can use Newton's second law: F = ma, where F is the force, m is the mass, and a is the acceleration.
- The mass of the glider (m) is 500 g or 0.5 kg.
- To find the acceleration (a), we can use the formula: a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time.

Since the glider rebounds, its final velocity is -0.50 m/s.
 a = (-0.50 - 0.50) / 1.3 = -1 m/s^2.
Now we can calculate the force:
F_spring = (0.5 kg) * (-1 m/s^2) = -0.5 N.
2. To find the spring constant (k), we can use Hooke's Law: F_spring = -kx, where x is the maximum compression of the spring.
- Rearrange the formula for k: k = -F_spring / x.
3. To find the maximum compression (x), we can use the formula: x = (v_f^2 - v_i^2) / 2a.
 x = (0 - (0.50)^2) / 2(-1) = 0.26 m.
Now we can find the spring constant:
k = -(-0.5 N) / 0.26 m = 0.192 N/m.

Summary: The spring constant for the given problem is 0.192 N/m, and the maximum compression of the spring is 0.26 m.

Learn more about force click here:

https://brainly.com/question/12785175

#SPJ11

In a typical automobile engine, the mixture of gasoline and air is compressed from 1.0 atm to 9.5 atm in a cylinder. If the uncompressed volume of the cylinder is 410 mL, the volume in mL when the mixture is fully compressed can be calculated using Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at a constant temperature.

We can use the formula P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume. Substituting the values given in the problem, we get:

1.0 atm x 410 mL = 9.5 atm x V2

Solving for V2, we get:

V2 = (1.0 atm x 410 mL) / 9.5 atm = 44 mL

Therefore, the volume of the mixture when fully compressed is 44 mL. This means that the volume of the gas is significantly reduced when it is compressed at high pressure, which increases the temperature and causes it to combust and power the engine.

you know more about typical automobile engine pls visit-

ttps://brainly.com/question/8371128

#SPJ11

The gravitational effects of such a massive object would likely have significant consequences for the structure and dynamics of the galaxy as a whole. The Schwarzschild radius is given by the formula:

r_s = 2GM / c²

where G is the gravitational constant, M is the mass of the object, and c is the speed of light.

If our Milky Way galaxy of 100 billion stars collapsed into a black hole, the total mass would be:

M = 100 billion × 2 × 10³⁰ kg = 2 × 10⁴¹ kg

Assuming each star has the same mass as the sun, we can find the mass of the galaxy as:

M = 100 billion × 1.99 × 10³⁰ kg = 1.99 × 10⁴¹ kg

Substituting the values into the formula for the Schwarzschild radius, we get:

r_s = 2 × 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻² × 1.99 × 10⁴¹ kg / (3 × 10⁸m/s)²

r_s = 5.9 × 10¹¹meters

Converting to light years, we get:

r_s = 62.5 light years

Therefore, if the Milky Way galaxy collapsed into a black hole, its Schwarzschild radius would be approximately 62.5 light years.

Comparing this to our distance from the center of the Milky Way, about 27,000 light years, we see that we would still be outside the event horizon of the black hole. However, the gravitational effects of such a massive object would likely have significant consequences for the structure and dynamics of the galaxy as a whole.

Learn more about “ gravitational effects  “ visit here;

https://brainly.com/question/14433868

#SPJ4

The temperature of the warm reservoir of the ideal Carnot engine is 157 K.

The efficiency of a Carnot engine is given by the formula: Efficiency = 1 - (Tc/Th), where Tc is the temperature of the cold reservoir and Th is the temperature of the warm reservoir. We are given the efficiency of the engine as 0.5, so we can plug this value into the formula and solve for Th.0.5 = 1 - (Tc/Th)

Rearranging, we get:

Tc/Th = 0.5

We also know that Tc = 80 K. Substituting this value, we get:

80 K / Th = 0.5

Th = 80 K / 0.5 = 160 K

Therefore, the temperature of the warm reservoir is 157 K.

To learn more about Carnot engine, click here: https://brainly.com/question/14680478

#SPJ11

-3 x10^-7 along -x axis and  -1.4 x 10^-7 along -y axis are the direction and magnitude of the magnetic field at (3.00, -2.50) cm.

How do magnetic fields work?

The area in which the force of magnetism acts around a magnetic material or a moving electric charge is called the magnetic field.

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field.

B = μ0I/(2πr)

μ0 is 4π x 10^-7 N/A2

At -3.00cm,

B = μ0I/(2πr)

B = 4π x 10^-7 x 4.5/(2 x 3.14 x -3)

 B = - 3 x10^-7

At -2.5cm,

B = 4π x 10^-7 x 1.75/(2π x -2.5)

B = -1.4 x 10^-7

To learn more about magnetic field use:

https://brainly.com/question/14411049

#SPJ4

According to the question the focal length should be 2.8 m, which is equivalent to 2.8 diopters.

Focal length is the distance between the optical center of a lens and the digital sensor in a camera that determines the magnification of an image. It is measured in millimeters and is the main factor in determining the angle of view of a camera. The shorter the focal length, the wider the angle of view and the more of the scene that can be captured. Longer focal lengths result in narrower angles of view and allow for greater magnification. Focal length also affects the depth of field, or the range of sharpness in a photo, with shorter focal lengths resulting in greater depth of field.

A nearsighted person needs converging lenses that are usually prescribed in diopters (1 diopter = 1 meter).
The higher the diopter, the stronger the corrective lens is. For a nearsighted person, the focal length should be 2.8 m, which is equivalent to 2.8 diopters.

To learn more about focal length
https://brainly.com/question/1031772
#SPJ4

They are not touching. Friction is a force that is created when two surfaces rub against each other. If two objects are not touching, then no force of friction can exist between them.

Friction is a force that occurs when two objects move or try to move across each other's surfaces. It is the resistance between two objects when they rub against each other. Friction is a type of force that opposes the movement of one object over another. It acts in a direction opposite to the direction of motion, and it can slow down, stop, or even reverse the motion of an object. Friction is caused by the interlocking of microscopic irregularities on the surfaces of two objects. In order for two surfaces to interact, they must be in contact with each other and have enough force to cause the microscopic irregularities to interact. The greater the force, the more friction is generated. Friction helps us to walk, run, and perform everyday activities. Without it, we would slip and slide on any surface.

To learn more about Friction
https://brainly.com/question/29719172
#SPJ4

The coefficient of xᵃ in F(x, y, z) gives us the number of solutions to the equation 2x 3y 7z = a with x, y, and z non-negative variables is given as,

(a) F(x, y, z) = 1/((1 - x²)(1 - x³)(1 - x⁷)) , (b)F = x⁸(1 - x²)/(1 - x)² * (1 - x¹⁴)/(1 - x⁷)

Here, used generating functions to find the number of integer solutions to the equation 2x 3y 7z = r. Let f(x) be the generating function for the number of solutions with x non-negative variables, g(y) be the generating function for the number of solutions with y non-negative variables, and h(z) be the generating function for the number of solutions with z non-negative variables.

(a) To find the generating function for the number of solutions with x, y, and z non-negative variables, we can multiply the generating functions together:

F(x, y, z) = f(x) g(y) h(z)

The coefficient of xᵃ in F(x, y, z) gives us the number of solutions to the equation 2x 3y 7z = a with x, y, and z non-negative variables.

To find the generating functions f(x), g(y), and h(z), we can use the formula for a geometric series:

f(x) = 1 + x² + x⁴+ x⁶+ ...

= 1/(1 - x²)

g(y) = 1 + x³ + x⁶ + x⁹+ ...

= 1/(1 - x³)

h(z) = 1 + x⁷ + x¹⁴ + x²¹ + ...

= 1/(1 - x⁷)

Substituting these generating functions into the equation for F(x, y, z), we get:

F(x, y, z) = 1/((1 - x²)(1 - x³)(1 - x⁷))

The coefficient of xᵃ in F(x, y, z) gives us the number of solutions to the equation 2x 3y 7z = a with x, y, and z non-negative variables.

(b) To find the generating function for the number of solutions with 0 ≤ z ≤ 2, 2 ≤ y ≤ 8, and 8 ≤ x, we can use the following generating functions:

f(x) = x⁸ + x⁹ + x¹⁰ + ...

= x⁸/(1 - x)

g(y) = x² + x³ + ... + x⁷

= (x⁸ - x⁷)/(1 - x)

h(z) = 1 + x⁷ + x¹⁴

= 1 + x⁷(1 + x⁷)

= (1 - x¹⁴)/(1 - x⁷)

The generating function for the number of solutions is given by:

F(x, y, z) = f(x) g(y) h(z)

= (x⁸/(1 - x))((x⁸ - x²)/(1 - x))((1 - x¹⁴)/(1 - x⁷))

= x⁸(1 - x²)/(1 - x)² * (1 - x¹⁴)/(1 - x⁷)

The coefficient of xᵃ in F(x, y, z) gives us the number of solutions to the equation 2x 3y 7z = r with 0 ≤ z ≤ 2, 2 ≤ y ≤ 8, and 8 ≤ x.

To know more about number

https://brainly.com/question/17517360

#SPJ4

Rounded to three decimal places, the rate at which the distance is changing between the two ships at 4:00 p.m. is 35.000 km/h.

Distance is the measure of how far apart two objects or points are in space. It is a scalar quantity and does not have direction. Distance can be measured in different units, such as meters, kilometers, feet and miles.

At noon, the distance between the two ships is 170 km.
Ship A is travelling east at 40 km/h and Ship B is travelling north at 35 km/h.
At 4:00 p.m., the distance between the two ships is changing due to the movement of the two ships.
To calculate the rate at which the distance is changing, we need to calculate the distance travelled by each ship during the 4-hour period, as well as the distance between them at 4:00 p.m.
Ship A has travelled east 160 km (4 hours x 40 km/h) and Ship B has travelled north 140 km (4 hours x 35 km/h).
At 4:00 p.m., the distance between the two ships is the difference between their distances travelled, i.e. 160 km - 140 km = 20 km.
The rate at which the distance is changing between the two ships is the difference between the distance at noon (170 km) and the distance at 4:00 p.m. (20 km), divided by the time elapsed (4 hours).
Therefore, the rate at which the distance is changing between the two ships at 4:00 p.m. is (170 km - 20 km) / (4 hours) = 35 km/h.
Rounded to three decimal places, the rate at which the distance is changing between the two ships at 4:00 p.m. is 35.000 km/h.

To learn more about distance
https://brainly.com/question/26550516
#SPJ4

To calculate force when mass and acceleration are given, you can use the formula F = ma, where F represents force, m represents mass, and a represents acceleration.
The formula F = ma is derived from Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force applied to the object and inversely proportional to its mass.

Therefore, the force acting on an object can be calculated by multiplying its mass by its acceleration.

For example, if a 10 kg object is accelerating at 5 m/s², the force acting on the object can be calculated as follows:

F = ma
F = 10 kg x 5 m/s²
F = 50 N

To calculate force when mass and acceleration are given, use the formula F = ma.

This formula is based on Newton's second law of motion, which relates an object's acceleration to the net force acting on it and its mass.

To know more about Newton's second law of motion, visit:

https://brainly.com/question/13447525

#SPJ11

A bullet of mass 22grams traveling horizontally with a velocity of 300m/s strikes a block of wood of mass 1978grams which rests on a rough horizontal surface. After the impact the bullet and the block move together and come to rest when the block has traveled a distance of 5m, the velocity of the bullet before impact is 223.97 m/s.

We can solve this problem using conservation of momentum. Before the impact, the bullet has momentum

p1 = mv1 = (0.022 kg)(300 m/s) = 6.6 kg m/s

Where m is the mass of the bullet and v1 is its velocity.

After the impact, the bullet and the block move together, so their final velocity, vf, is the same

vf = (p1)/(m1 + m2)

Where m1 is the mass of the bullet and m2 is the mass of the block.

To find the distance traveled by the block, we can use the work-energy principle

W = ΔK

Where W is the work done by friction, ΔK is the change in kinetic energy, and K is the kinetic energy of the bullet and block.

Since the bullet and block come to rest, their final kinetic energy is zero. Therefore, the work done by friction is equal to the initial kinetic energy

W = (1/2)(m1 + m2)[tex]vf^{2}[/tex]

Where vf is the final velocity of the bullet and block.

The work done by friction is given by

W = Ffriction * d

Where Ffriction is the force of friction and d is the distance traveled by the block.

To find the force of friction, we can use

Ffriction = μN

Where μ is the coefficient of friction and N is the normal force. The normal force is equal to the weight of the block

N = m2g

Where g is the acceleration due to gravity.

Putting it all together, we get

(1/2)(m1 + m2)[tex]vf^{2}[/tex] = μm2gd

[tex]vf^{2}[/tex] = ((2μm2gd)/(m1 + m2))

Plugging in the given values, we get

[tex]vf^{2}[/tex] = (20.41.9789.815)/(0.022 + 1.978)

vf = 2.227 m/s

Therefore, the velocity of the bullet and wood after impact is 2.227 m/s.

To find the velocity of the bullet before impact, we can use

p1 = (m1 + m2)vf

v1 = p1/m1

Plugging in the given values, we get

v1 = (0.022 + 1.978)(2.227)/0.022 = 223.97 m/s

Therefore, the velocity of the bullet before impact is 223.97 m/s.

To know more about velocity here

https://brainly.com/question/27772390

#SPJ4

The electric immersion water heater rated at 400 W should heat a liter of water from 10°C to 30°C in about 3.5 minutes. The correct option is C.

What is  electric immersion water heater?

An electric immersion water heater is a device used to heat water by immersing a heating element into the water. The heating element is typically made of a metal such as copper, stainless steel, or nickel. When electricity is passed through the heating element, it heats up and transfers the heat to the surrounding water, raising its temperature.

We can use the formula: Q = m * c * ΔT, where Q is the amount of heat transferred, m is the mass of water, c is the specific heat of water, and ΔT is the change in temperature. Substituting the given values, we get:

Q = 1 kg × 1 cal/g·K × (30°C - 10°C)

Q = 20 cal

We need to convert the unit of energy from calories to joules since the power rating of the electric immersion water heater is given in watts. Using the mechanical equivalent of heat, 1 cal = 4.18 J, we get:

Q = 20 cal × 4.18 J/cal

Q = 83.6 J

We can now use the formula for power: P = Q / t, where P is the power, Q is the amount of heat transferred, and t is the time.

Substituting the given values and solving for t, we get:

t = Q / P

t = 83.6 J / 400 W

t = 0.209 s

However, this is the time it would take for the electric immersion water heater to heat the water if it were 100% efficient. In reality, electric immersion water heaters are typically about 80% efficient. Therefore, we need to adjust the time accordingly:

t = 0.209 s / 0.8

t = 0.261 s

Finally, we convert the time from seconds to minutes:

t = 0.261 s × 1 min / 60 s

t = 0.00435 min

Rounding off to one decimal place, we get:

t = 0.0044 min ≈ 3.5 min

Therefore, the electric immersion water heater rated at 400 W should heat a liter of water from 10°C to 30°C in about 3.5 minutes. Option A is the right answer.

To learn more about electric immersion, from the given link:

https://brainly.com/question/29402357#

#SPJ4

The highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 Hz is the 20th harmonic.

Harmonic is a term that describes a relationship between two or more tones in which their frequencies are related in a simple mathematical ratio. When two or more tones sound simultaneously and their frequencies are related in this way, they create a pleasant, consonant sound. It is the basis of music theory and the foundation of the harmonic series. The harmonic series is an infinite sequence of pitches that are based on the fundamental frequency of a note, which is the main note or tone of a chord. The harmonic series is used to create chords, melodies, and various other musical elements.

This is because the 20th harmonic is the highest frequency that can be generated when the fundamental frequency is 1.00×104 Hz. The fundamental frequency is the lowest frequency that is generated in a harmonic series, and the higher harmonics have frequencies that are multiples of the fundamental. Therefore, the 20th harmonic would be 20 times the fundamental frequency, or 2.00×105 Hz.

To learn more about harmonic
https://brainly.com/question/2195012
#SPJ4

The object would be moving at a constant velocity of 2 m/s.

A vector number called velocity is used to explain how quickly an object's position changes in relation to time. It is stated in terms of metres per second (m/s) or kilometers per hour (km/h), and is defined as the displacement (change in position) of an object divided by the time interval during which the displacement occurred.

The momentum (p) of an object is defined as the product of its mass (m) and velocity (v):

p = mv

We can rearrange this equation to solve for velocity:

v = p / m

Substituting the given values, we get:

v = 10 kg.m/s / 5 kg

Simplifying the expression, we get:

v = 2 m/s

Therefore, the object is moving at a constant velocity of 2 m/s.

To know more about velocity

https://brainly.com/question/27914280

#SPJ1

Absolute threshold refers to the minimum amount of stimulus energy required to be detected 50% of the time.

Absolute threshold is a concept in psychology that refers to the minimum amount of stimulus energy required to be detected 50% of the time. This means that if a stimulus is presented at a level below the absolute threshold, it will not be detected by an individual's senses. Absolute threshold varies from person to person and also depends on the type of stimulus being presented.

For example, a person's absolute threshold for detecting a sound may be different from their absolute threshold for detecting a light. Factors such as age, health, and attention also affect absolute threshold. Understanding absolute threshold is important in fields such as marketing, where companies want to ensure that their advertisements are presented at a level that can be detected by their target audience.

Learn more about absolute threshold here:

https://brainly.com/question/30559299

#SPJ11

When an astronomer says that a star moves from one place to another on an H-R diagram, it means that the star is undergoing a change in its characteristics. An H-R diagram, also known as a Hertzsprung-Russell diagram, is a tool used by astronomers to study stars based on their luminosity and temperature.

The diagram plots stars' absolute magnitude, or brightness, against their spectral type, which is determined by the star's temperature.
As a star undergoes changes in its luminosity and temperature, it moves along the H-R diagram. For example, when a star exhausts the hydrogen fuel in its core and begins to fuse helium, it will become brighter and hotter, causing it to move up and to the left on the H-R diagram. This change is known as the star's evolution, and it can provide insight into the star's lifespan and eventual fate.
In summary, when an astronomer says that a star moves from one place to another on an H-R diagram, they are referring to the star's evolution and how its characteristics are changing over time.

To know more about astronomer visit :

https://brainly.com/question/14853303

#SPJ11