A 1.5kg piece of copper is set out in the sun. Its temperature rises from
34°C to 48°C and the specific heat is 387J/(kg°C). What is the heat energy
gained by the metal?

Answer:

The acceleration of an object can be calculated using Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. The equation is:

F = ma

where F is the force, m is the mass, and a is the acceleration.

So, if we know the mass of the object (m = 56 kg) and the force acting on it (F = 800 N), we can calculate the acceleration (a) by dividing the force by the mass:

a = F / m

a = 800 N / 56 kg

a = 14.28 m/s^2

So the acceleration is 14.28 m/s^2

By orthogonality, vectors tj < Vj, Vi> = 0.

Given,

v₁, v₂, and v₃ are mutually orthogonal vectors in r³.

Let v₁, v₂,...vₓ ∈ V form an orthogonal set if and only if

<Vi, Vj> = { 1 if i = j ; and 0 if i ≠ j}

Now, let v₁, v₂, and v₃ are non-zero vectors that form an orthogonal set.

Suppose t₁v₁ + t₂v₂ + t₃v₃ = 0; for some t₁, t₂, t₃∈ R

Then for any index t ≤ i ≤ 3, we have

< t₁v₁ + t₂v₂ + t₃v₃, Vi> = < 0, Vi> which equals to 0.

t₁<v₁,Vi>  + t₂<v₂,Vi> + t₃<v₃, Vi> = 0

By orthogonality, tj < Vj, Vi> = 0

Or, tj = 0

Where, i = j = < 1, 2, 3>

Hence proved.

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The correct magnitude of the magnetic field using the exact formula is \(3.32 \times 10^{(-6)} T\), while the approximate formula yields an incorrect value of \(1.05 \times 10^{(-5) }T\).

Using the exact formula, the magnitude of the magnetic field (B) can be calculated using the formula:

B = (μ₀ * I) / (2π * r)

Where μ₀ is the permeability of free space (a constant), I is the current, and r is the distance from the wire.

Plugging in the given values, we get:

\(B = (4\pi \times 10^{(-7)} \times 0.5 ) / (2 \pi \times 0.03 m)\)

Simplifying the equation, we find:

\(B = 3.32 \times 10^{(-6)} T\) (tesla)

This result, \(3.32 \times 10^{(-6) }T\), is the correct magnitude of the magnetic field using the exact formula.

Now let's consider the approximate formula:

B ≈ (μ₀ * I) / (2π * r)

In the approximate formula, we can approximate π as 3.14. Plugging in the values, we get:

\(B = (4\pi \times10^{(-7)} \times 0.5) / (2 \times 3.14 \times 0.03 m)\)

Simplifying the equation, we find:

\(B = 1.05 \times 10^{(-5)}\) T (tesla)

This result, \(1.05 \times 10^{(-5)}\)T, is incorrect. The approximate formula overestimates the magnitude of the magnetic field.

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1. Adam's displacement during the chase can be calculated by adding the individual displacements of James and Nick, since Adam is standing in between them.

The displacement of James is 32 m [E], which means he is 32 meters to the east of the flagpole. The displacement of Nick is unknown.

To find Adam's displacement, determine the direction and distance he moved relative to the flagpole. Since he is standing 17 m [W] of the flagpole, his displacement is 17 m to the west.

Therefore, Adam's displacement during the chase is:

Displacement = 17 m [W] + Nick's displacement

2. The vertical component of the monkey's velocity can be found using trigonometry.

Given: Initial velocity (v) = 69 km/h, Angle (θ) = 12°

The vertical component of velocity (v_y) can be calculated using the following formula:

v_y = v × sin(θ)

where sin(θ) = sine of the angle θ.

Converting the initial velocity to meters per second (m/s) and the angle to radians:

v = 69 km/h = 19.17 m/s

θ = 12° = 0.21 radians

Substituting these values in the formula:

v_y = 19.17 m/s × sin(0.21) = 4.21 m/s  

Therefore, the vertical component of the monkey's velocity is 4.21 m/s.

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As stated in the preceding statement The highest tides occur during new moon nor low moon phases.

The Moon will finish moving away from Earth at present rate of separation in around 15 billion years, according to calculations of the development of the Earth/Moon system. In around 6 to 700 million years, our Sun is predicted to enter his Red Giant phase.

The stability of the climate is maintained by the moon's gravitational pull, which reduces Earth's tremor. A blessing for life, that. Without it, the climate may change dramatically over millennia, with certain regions being extremely hot before going through protracted ice ages.

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Answer:

Measurement scales are used to categorize and/or quantify variables. This lesson describes the four scales of measurement that are commonly used in statistical analysis: nominal, ordinal, interval, and ratio scales.

Hope I helped let me know if I didn't

To find the intensity of the sound waves emitted by a 1.0 W point source isotropically at different distances, we can use the formula for intensity:

Intensity (I) = Power (P) / Surface Area (A)

Since the sound waves are emitted isotropically, the surface area is that of a sphere with the radius being the distance from the source. The formula for the surface area of a sphere is:

A = 4 * pi * r^2

(a) To find the intensity 1.0 m from the source, first calculate the surface area:
A = 4 * pi * (1.0 m)^2 = 4 * pi * 1.0 = 4 * 3.14159 ≈ 12.566 sq.m

Next, calculate the intensity using the power (1.0 W) and surface area:
I = 1.0 W / 12.566 sq.m ≈ 0.0796 W/sq.m

(b) To find the intensity 2.5 m from the source, first calculate the surface area:
A = 4 * pi * (2.5 m)^2 = 4 * pi * 6.25 = 4 * 3.14159 * 6.25 ≈ 78.54 sq.m

Next, calculate the intensity using the power (1.0 W) and surface area:
I = 1.0 W / 78.54 sq.m ≈ 0.0127 W/sq.m

So, the intensity of the sound waves is approximately 0.0796 W/sq.m at 1.0 m from the source and 0.0127 W/sq.m at 2.5 m from the source.

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Social conventions are norms and customs that are accepted and followed by a particular society or culture. These conventions may differ from Momentum culture to another.

Social conventions are the unwritten rules or norms that people follow in their daily interactions and activities. In this example, adhering to a dress code at a formal event is a social convention because it is an accepted practice that helps maintain order and harmony within the event setting.

Morality, on the other hand, deals with principles that help us distinguish right from wrong, or good from bad, based on ethical and moral standards. Social conventions can sometimes be related to morality, but the example provided here mainly focuses on social expectations rather than moral or ethical concerns.

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Answer:

at max height you potential energy is highest

Explanation

At your maximum height, your potential energy is highest.  

And at your exact peak, your kinetic energy is zero, which is the lowest it can ever be.

When all the air inside the tin are taken out, the air outside the tin becomes greater than the air inside causing inward pushing of the tin which results in collapse of the tin.

This is a situation when the forces acting on an object are unequal.

A tin will remain firm when air inside it is prevented from escaping. During this time, the forces of air outside the tin balances the forces of air inside the tin, this process creates equilibrium condition that cause the tin to be firm.

When all the air inside the tin are taken out, the air outside the tin becomes greater than the air inside causing inward pushing of the tin which results in collapse of the tin.

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Hi there!

Using the Impulse-Momentum theorem:

I = Δp = mΔv

Where:

I = Impulse (Ns)

m = mass of object (kg)

Δv = change in velocity (vf - vi, m/s)

Plug in the given values and solve:

60 = 5Δv

Δv = 12 m/s

Answer: D. Cobalt

Explanation: Cobalt has excellent magnetic properties so it is D. Cobalt.

The element which has magnetic properties from the given list of elements would be cobalt , therefore the correct answer is option C.

The elements of the periodic tables that behave as metals, as well as the nonmetal in some chemical or physical aspects, are known as metalloids. Some examples of metalloids are Boron , silicon , germanium, arsenic , antimony , tellurium , etc.

As given in the problem we have to find out the element which possesses the magnetic properties from the given list ,

Calcium belongs to group 2 of the periodic table and nonmagnetic element . Similarly , carbon is a nonmagnetic material .

Thus , the element which has magnetic properties from the given list of elements would be cobalt, therefore the correct answer is option C .

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Answer: pretty sure 14 pounds

Explanation:

\(Question\)

What type of drawing is shown in the figure?

Answer:

Hi, There!  My Answer would Be A. Block diagram Or C. panel Diagram!

Hope this helps! ♚♛♕♔ッ✨♚

\(-xXxAnimexXx-\)

The center of a mass, also known as the center of gravity, is a point at which the total weight of an object can be considered to be concentrated.

Centre of a mass is the point at which the object is in balance, and any external force applied to it will cause it to rotate around this point. The center of mass is calculated by considering the mass distribution of an object and determining the point at which the object is in balance.

The center of mass of a symmetrical object, such as a sphere, is located at its geometric center. For an asymmetrical object, such as a flat plate or a human body, the center of mass is located at a different point from its geometric center. The location of the center of mass is determined by the distribution of mass in the object, with heavier parts of the object having more influence on the position of the center of mass.

The concept of center of mass is important in many fields, including physics, engineering, and mechanics. It is used to determine the stability of objects, to calculate the forces and torques that act on objects, and to understand the motion of objects in the presence of external forces. Understanding the center of mass is also essential in fields such as robotics, biomechanics, and sports science, where the motion of objects and the forces that act on them are critical.

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X-ray spectrum represents the shortest wavelengths because of their electromagnetic radiation. Thus, option B is correct.

X-rays possess a high range of energy and find shorter wavelengths than ultraviolet and radio waves. They are another form of electromagnetic radiation that has a range from 0.01 to 10 nanometers. Wilhelm Conrad Roentgen found X-rays in the year 1895.

Wilhelm Conrad Roentgen stated that X-rays are formed when high-energy electrons collide with atoms at a great speed that causes electrons to disperse from the atoms. These dispersed electrons will return to their original position by releasing energy in the form of X-rays.

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The complete question is:

Which spectrum represents the shortest wavelengths?

a. ultraviolet light

b. X-rays

c. Breen visible light

d.  radio waves

The velocity of the car is: 15.24m/s.

To have the same momentum as a 2280kg pickup truck traveling at 21m/s to the east, a car with a mass of 1370kg must have a velocity of 15.24m/s to the east.

This can be calculated using the formula for momentum, which is:

Thus, we can rearrange the equation to solve for v: v = p/m.

Substituting in the values given, we get: v = (2280kg * 21m/s)/1370kg = 15.24m/s.

Velocity is a vector quantity that describes the rate and direction of an object's motion. It is the speed of an object in a particular direction and is usually expressed in units such as meters per second (m/s).

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According to the Newton's second law,

where F is the force on the object, m is the mass of the obect and a is the acceleration of the object.

Substituting the known values,

Thus, the mass of the object is,

Hence, the mass of the object is 6 kg.

The energy of nuclear fission is released as kinetic energy of the fission products and fragments, and as electromagnetic radiation in the form of gamma rays; in a nuclear reactor, the energy is converted to heat as the particles and gamma rays collide with the atoms that make up the reactor and its working fluid, ...

Galaxies are indeed large groups of stars, and they can range in size from dwarf galaxies with only a few million stars to massive galaxies with trillions of stars. However, the stars within a galaxy are not stationary. They are in constant motion, but what keeps them from moving away from each other is gravity.

Gravity is a fundamental force of nature that attracts objects with mass toward each other. In a galaxy, the stars are held together by the gravitational pull of other stars. The combined mass of all the stars in a galaxy creates a powerful gravitational force that keeps them together. The more massive a galaxy is, the stronger its gravitational force, which in turn keeps the stars tightly bound.

In addition to gravity, there is also dark matter. Dark matter is a mysterious substance that makes up a significant portion of the universe's total mass. It is believed that dark matter exists within galaxies and that its gravitational pull helps hold the stars together.

In summary, the stars within a galaxy are kept from moving away from each other by the powerful force of gravity. This force is created by the combined mass of all the stars and is further strengthened by the presence of dark matter.

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According to 501.105 (A) of the National Electrical Code (NEC), enclosures identified for Class I, Division 1 locations should be provided in Class I, Division 1 locations, transformers, etc.

The National Electrical Code (NEC) can be defined as a regional standard that is adopted by various municipalities, cities and state, in order to ensure the safe installation of electrical wiring, machineries (equipment), transformers, impedance coils, and resistors in the United States of America.

Basically, the main purpose of the National Electrical Code (NEC) is to enable safe and effective electrical practices and installations in the United States of America.

According to 501.105 (A) of the National Electrical Code (NEC), the following location and equipment should be provided with enclosures identified for Class I, Division 1 locations:

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Answer:

electrostatic forces is the answer

Answer:

x = 121.86 m

Explanation:

It is given that,

The vertical velocity of a plane, \(v_x=18\ m/s\)

It is flying above the target, h = 225 m

First we will find the time taken by the plane to reach the ground. It can be calculated using the second equation of motion as follow :

\(h=ut+\dfrac{1}{2}at^2\)

Here, u = 0 and a = g

\(h=\dfrac{1}{2}gt^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 225}{9.81}} \\\\t=6.77\ s\)

Let x is the horizontal distance from the target. It can be calculated as follows :

\(x=v_xt\\\\x=18\times 6.77\\\\x=121.86\ m\)

So, the rescue pilot drop the package at a distance of 121.86 m from the target.

Acceleration is actually defined as the rate of change in velocity. The correct option is B.

Velocity is defined as the ratio of the distance moved by the object at a particular time. The velocity is a vector quantity and to represent its direction is also required with the magnitude. The unit of the measurement of the velocity is meter per second or miles per hour etc.

Acceleration is actually defined as the rate of change in velocity. In other words, it can be defined as the change in the velocity with the change in time of the object. Acceleration is also a vector quantity and requires direction and magnitude to represent it. The unit of measurement of the acceleration is a meter per second square.

Therefore, acceleration is actually defined as the rate of change in velocity. The correct option is B.

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The force of the sawhorse A is calculated to be 82.6 N and the force of the sawhorse B is calculated to be 33.04 N.

Mass of the ladder is given as 11.8 kg.

Length of the ladder is given as 1.8 m.

Distance of Sawhorse A from one end = 0.6 m

Distance of sawhorse B from other end = 0.15 m

So, the centre of the ladder is 1.8/2 = 0.9 m

Now, the distance of sawhorse A from centre = r = 0.9 - 0.6 = 0.3 m

Distance of sawhorse B from centre of ladder = 0.9 - 0.15 = 0.75  m

Force of gravity on the ladder = m g = 11.8 × 9.8 = 115.64 N

Torque applied on Sawhorse A = 0.3 Fa

Torque applied on Sawhorse B = 0.75 Fb

When they are in equilibrium,

0.3 Fa = 0.75 Fb

Fb = 0.3/0.75 Fa = 0.4 Fa

Fa + Fb = Fa + 0.4 Fa = 1.4 Fa

1.4 Fa = 115.64

Fa = 82.6 N

Fb = 0.4 Fa = 0.4(82.6) = 33.04 N

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F  = 7.1 Hz

By Emf = -N∆(BA)/∆t

8 = [200 x 30 x 10^-3 x 300 x 10^-4]/∆t

∆t = 0.023 sec

n = 1/T = 1/0.023 = 44.44 Hz

angular frequency = 44.44/2pi

   = 7.1 Hz

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Answer:

82

Explanation:

According to law of reflection, the angle of incidence = angle of reflection

Answer:

The angle of incidence will be equal to the reflection.

Explanation:

The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

So 82 would be the answer.

The lever is in equilibrium, and is considered massless. all pulleys are massless and frictionless. the slanted string is:: Tensioned.

In an equilibrium state, all forces acting on the system must balance each other out.

In this case, since the lever is in equilibrium and the pulleys are massless and frictionless, the tension in the string is responsible for maintaining the balance.

The tension in the slanted string is crucial for transmitting the force applied at one end of the lever to the other end, allowing for the equilibrium of the lever system. The tension force acts along the string and is directed away from the pivot point of the lever.

By maintaining tension in the string, the force applied to one end of the lever is transmitted to the other end, allowing for the lever to remain in a stable position.

The tension in the string counterbalances the other forces acting on the lever, such as the weight of the masses or external forces applied.

Therefore, the slanted string is an essential component in achieving equilibrium in the lever system and is under tension to maintain stability.

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Answer:

1 - theory

2 - law

3 - hypothesis

Explanation:

I'm pretty sure this is correct