A sample of an unknown substance has a mass of 0. 158 kg. If 2,510. 0 J of heat is required to heat the substance from 32. 0°C to 61. 0°C, what is the specific heat of the substance? Use q equals m C subscript p Delta T. 0. 171 J/(gi°C) 0. 548 J/(gi°C) 15. 9 J/(gi°C) 86. 6 J/(gi°C).

The force ratio fp/fe is equal to 1. This is because the unsigned charges of the proton and the electron are equal, and they experience the same electric field. The magnitude of the electric force experienced by a charged particle in an electric field at a position is equal to the product of the electric field and the unsigned charge of the particle.

F = qE

where

F is the force

q is the charge

E is the electric field

The proton and the electron have the same charge, so the magnitude of the force they experience is equal. The electric field is also the same, so the force ratio fp/fe is equal to 1.

fp/fe = q_p E / q_e E = 1

In other words, the force on the proton is equal to the force on the electron.

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A simple wheel and axle is a mechanical device used to lift a bucket out of a well by utilizing the principle of torque and rotational motion.

A simple wheel and axle consists of two components: a wheel, which is a circular disc, and an axle, which is a rod-like structure that passes through the center of the wheel. The wheel and axle are connected, and when a force is applied to the wheel, it creates a torque that causes the wheel to rotate.

In the context of lifting a bucket out of a well, the wheel is typically larger in diameter compared to the axle. The bucket is attached to a rope or chain, which is wound around the wheel. By applying a downward force on one side of the wheel, a torque is generated, causing the wheel to rotate. As the wheel rotates, the bucket is lifted out of the well.

The principle behind the functioning of a simple wheel and axle is based on the concept of mechanical advantage. The larger wheel allows for a greater distance to be covered with each rotation, enabling the bucket to be lifted with less effort compared to lifting it directly.

In summary, a simple wheel and axle is an effective mechanism for lifting a bucket out of a well. By applying a force to the wheel, the rotational motion and torque generated enable the bucket to be raised with mechanical advantage.

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Answer:

3

Explanation:

let the number be x

perform and forming expression

12 is added

=12 + x

4 is multiplied to expression

= 4 (12 + x)

result is 60

equating

4(12 + x) = 60

48 + 4x=60

4x = 60-48

4x = 12

x= 12/4

x= 3

Answer:

a &c

Explanation:

>3

Attraction between the molecules of a liquid and the temperature at which the liquid changes state is "Strong attractions mean the liquid boils at a higher temperature". The correct option is C

Temperature is a physical quantity which measures hotness and coldness of a body. Temperature measures the degree of vibration of molecule in a body. Temperature is measured in centigrade (°C), Fahrenheit (°F) and Kelvin (K) in which Kelvin (K) is a SI unit of temperature. Absolute scale of temperature means Kelvin scale of temperature.

relation between Kelvin(K) and centigrade (°C),

°C= K - 273.15

from equation, 273.15 K means 0 °C, which is freezing point of water (ice).

when we give temperature to the body, its molecule or atom absorbs thermal energy and vibrate about their mean position. Amplitude of vibration get increases as we go on increasing temperature and for higher temperature force of attraction between molecules gets weaker. Hence for higher temperature, due to weaken the force of attraction between molecule, solid goes into liquid state. and further increase in temperature liquid goes into gaseous state.

Liquid has stronger force of attraction than gas and weaker than solid. Strong force of attraction means high temperature should be given to break molecular bonds. Therefore Strong attractions mean the liquid boils at a higher temperature.

Hence option C is correct.

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A couple took a small airplane for a quick flight up to the wine country for a romantic dinner and then returned home. The plane flew a total of 5 hours and each way the trip was 300 miles. If the plane was flying at 125mph, the speed of the wind that affected the plane is 25mph.

Given that, speed of airplane Vₐ= 125 mph

speed of wind V = ?

Speed of wind moving against wind is Vₐ- V

Speed of wind moving along wind is Vₐ+ V

Time taken to fly against wind is 300/( Vₐ- V)

Time taken to fly along wind is 300/( Vₐ+ V)

Total time taken to fly both ways = 5 hours

We know, time = distance/velocity

So,

300/( Vₐ- V) + 300/( Vₐ+ V) = 5

300(Vₐ- V+Vₐ+ V)/(Vₐ²-V²) = 5

600Vₐ/5 = Vₐ²-V²

120Vₐ - Vₐ² = -V²

120*125-125*125 = -V²

V²= 625

V = 25 mph

Thus, speed of the wind is 25 mph.

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Answer:

darn this too much lololpop

Answer: ΔPEg = mgh

Explanation: Increases in height and the acceleration due to gravity. The gravitational potential energy of an object near Earth's surface is due to its position in the mass-Earth system.

Twisted pair cabling consists of one or more insulated wire pairs encased in a plastic sheath.

This type of cable is widely used for data transmission in telecommunications and computer networks, as it offers reliable performance and cost-effective implementation.

The twisted design reduces electromagnetic interference and crosstalk, ensuring high signal integrity and efficient data transfer. Twisted pair cables come in two categories: Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP).

UTP is more common and affordable, while STP provides additional shielding for improved noise reduction in electrically noisy environments. Applications of twisted pair cabling include Ethernet networks, telephone systems, and digital video systems.

In summary, twisted pair cabling is a versatile and cost-effective solution for data communication, offering reliable performance in various applications.

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Answer:

see below

Explanation:

Horizontal component   = 20 cos 60° N = 10 N

Vertical component       = 20 sin 60°  N  = 17.3 N

In designing a rocket to select an engine based on how much force it produces, the engine need to produce 144 N force.

Force applied on launching model rockets is calculated by the formula,

F = m*a

where,

F is the force of engine

m is the mass

a is the acceleration

The given data are :

m = 5 Kg

a = 28.8 m/s²

F = ?

Now, putting the values in the formula we get,

F = 5 Kg x 28.8 m/s²

F = 144 N

So,  In designing a rocket to select an engine based on how much force it produces, the engine need to produce 144 N force.

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Answer:

Yes becuase the circuit is fryed like sum french fries so yes yes is the yes option yes okay, yes but no

Explanation:

If you were to insert additional resistors in series, the equivalent resistance increases. The correct option is c.

The resistances when connected in series has the equivalent resistance equal to the sum of all the individual resistances.

In the series circuit, the equivalent resistance is

Req= R₁ + R₂ + R₃

Suppose you had an electrical circuit and decided to change it into a new circuit.

The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance.

Yes, the equivalent resistance of the new circuit compare to the old one.

If you were to insert additional resistors in series, the equivalent resistance increases.

Thus, the correct option is c.

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The magnitude of vector A must be equal to the magnitude of vector B

Vector equals vector b. For two vectors to be equal, their magnitudes and directions must be the same. A vector’s components can never have a magnitude bigger than the vector itself. This is demonstrated by Pythagorean’s Thereom. There is a possibility that a component of a vector has the same magnitude as the vector itself. E.g. A=2x + 0y.

According to the parallelogram rule, if two vectors are placed such that they have the same beginning point and then completed into a parallelogram, the total of the vectors is the directed diagonal that starts at the same position as the vectors.

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Answer:

the answer is for the question is B

Answer:

vₓ = 63.07 m/s

Explanation:

The horizontal vector component of the velocity can be found by the following formula:

\(v_x = vCos\theta\)

where,

vₓ = horizontal vector component of velocity = ?

v = magnitude of velocity = 77 m/s

θ = angle with x-axis = 35°

Therefore,

\(v_x = (77\ m/s)Cos\ 35^o\)

vₓ = 63.07 m/s

Assuming the applied force is exerted parallel to the floor, by Newton's second law both the net vertical and net horizontal forces would be zero:

∑ F (horizontal) = p - f = 0 … … … because the desk is pushed at a constant speed

∑ F (vertical) = n - mg = 0 … … … because the desk doesn't move up or down

where p is the magnitude of the applied force, f is the mag. of kinetic friction, n is the mag. of the normal force due to contact between the floor and desk, and mg is the weight of the desk. We have

n = mg = (100 kg) g = 980 N

and the mag. of friction is proportional to n according to

f = 0.4 n = 392 N

Then the applied force p has magnitude

p = f = 392 N

Elements are one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.

Elements are made up of identical atoms. It is generally said that the atoms that make up an element are the same and different from atoms of other elements.

Compounds, on the other hand, are substances formed by chemical bonding of two or more elements in definite proportions by weight.

Examples of elements are Calcium, Pottasium, Neon, Rubidium, Hydrogen etc. These elements contain atoms that are identical. Chemical elements on the periodic table are about 118 in number arranged in accordance with their atomic number.

When two or more elements chemically combine, they for chemical compounds. Examples are carbondioxide, water, ethane, ethanol etc.

Majority of the elements are metallic, meaning that they have characteristics such as shiny appearance, good conductors of heat and electricity etc.

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When the child moves from the center to the edge of the rotating platform, the following changes occur in the child-platform system: 1. Angular momentum, 2. Rotational inertia, 3. Angular velocity and 4. Rotational kinetic energy.

1. Angular momentum: Remains constant. Angular momentum is conserved in the absence of external torque, so the total angular momentum of the child-platform system does not change.

2. Rotational inertia: Increases. As the child moves away from the center, the distance between the child and the rotation axis increases, which leads to an increase in the moment of inertia (rotational inertia) of the system.

3. Angular velocity: Decreases. Due to the conservation of angular momentum (L = Iω, where L is angular momentum, I is rotational inertia, and ω is angular velocity), as rotational inertia increases, angular velocity must decrease to keep the product constant.

4. Rotational kinetic energy: Remains constant. Since the total angular momentum is conserved, and rotational kinetic energy is proportional to the square of angular velocity and rotational inertia (K = 1/2 Iω^2), the changes in angular velocity and rotational inertia result in no net change in rotational kinetic energy.

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Explanation:

If no force is exerted on a moving object, it will continue to move at a constant velocity. This is described by Newton's first law of motion, which states that an object will remain at rest or continue to move at a constant velocity in a straight line unless acted upon by an external force. In other words, if no net force acts on an object, the object will maintain its velocity, neither speeding up nor slowing down.

Answer:

300 Newtons

Explanation:

Weight is the force of attraction between two bodies, one usually larger (like a planet), and one smaller (like a person). Force can be calculated using the formula: Force = mass × acceleration.

The mass here is 12kg, the acceleration, which in this case, is the acceleration due to gravity is 25m/s/s, by plugging in our values, we have

Force = 12 × 25 = 300 Newtons or 300 N for short.

Answer:

A. f = 8 Hz

B. T = 0.125 s

C. λ = 0.0166 m = 16.6 mm

D. d = 7.98 m

Explanation:

A.

The frequency of the wave can be given as:

\(f = \frac{n.\ of\ waves}{time}\\\\f = \frac{360}{45\ s}\\\)

f = 8 Hz

B.

The time period will be:

\(T = \frac{1}{f}\\\\T = \frac{1}{8\ Hz}\\\)

T = 0.125 s

C.

The wavelength is given as:

\(\lambda = \frac{c}{f}\\\\\lambda = \frac{0.133\ m/s}{8\ Hz}\)

λ = 0.0166 m = 16.6 mm

D.

The distance traveled in 1 minute can be found out as follows:

\(c = \frac{d}{t}\\\\d = c\ t\\d = (0.133\ m/s)(60\ s)\)

d = 7.98 m

Coordinate covalent bonds, also known as dative bonds or coordinate bonds, are a type of chemical bond formed by the sharing of a pair of electrons between two atoms, in which one of the atoms provides both electrons.

The atom that provides both electrons is said to have "donated" its electrons, while the other atom is said to have "accepted" the electrons.

In a coordinate covalent bond, the bond is formed because one of the atoms has a spare pair of electrons that it can donate to the other atom, which has a shortage of electrons. This results in a stronger bond than a regular covalent bond, as both electrons come from the same atom.

Coordinate covalent bonds are often seen in compounds that contain transition metals, where the metal ion donates a pair of electrons to a ligand (another molecule or ion) to form a complex. These bonds are important in many biological systems, such as enzymes, where the transition metal ions coordinate with ligands to form a specific active site for a reaction.

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To determine the magnitude of the acceleration of the motorcycle, we need to know the force of friction acting on the wheels. The force of friction is equal to the coefficient of friction multiplied by the normal force acting on the wheels, which is equal to the weight of the motorcycle and rider. The weight of the motorcycle and rider can be calculated by multiplying the mass by the acceleration due to gravity (9.8 m/s^2). So, the force of friction acting on the wheels of the motorcycle is equal to 0.88 * 196 kg * 9.8 m/s^2 = 1661.28 N.

The acceleration of the motorcycle is equal to the force of friction divided by the mass of the motorcycle and rider. So, the acceleration of the motorcycle is equal to 1661.28 N / 196 kg = 8.45 m/s^2.

Answer:  8.45 m/s^2

The magnitude of the electric field at point p is \(\frac{2kQ}{a\sqrt{4a^{2} + L^{2} } }\).

An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. It can also refer to a system of charged particles' physical field.

The human body is affected by low-frequency electric fields in the same way that they are affected by other charged-particle-containing materials. The distribution of electric charges at conductive materials' surfaces is affected by electric fields acting on such materials. They make the body conduct current to the ground.

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The equilibrium position of the spheres depends on their conductivity; if both spheres are conductive, they will come to rest in contact, if one sphere is conductive and the other is insulating, they will come to rest separated by some distance.

Perfectly conductive spheres: Since both spheres are conductive, they will both be at the same electrical potential. Therefore, there will be no electrostatic force between them and they will come to rest in contact with each other.

One perfectly conductive sphere and one perfectly insulating sphere: The conductive sphere will distribute its charge evenly over its surface, whereas the insulating sphere will retain its charge on its surface.

This will create an electrostatic force between the two spheres, which will cause them to repel each other and come to rest separated by some distance.

Both perfectly insulating spheres: Both spheres will retain their charge on their surfaces, creating an electrostatic force between them.

The sphere with the greater charge will exert a stronger force on the other sphere and they will come to rest separated by some distance, with the sphere of greater charge closer to the common attachment point.

In conclusion, the equilibrium position of the spheres depends on their conductivity. If both spheres are conductive, they will come to rest in contact.

If one sphere is conductive and the other is insulating, it will come to rest separated by some distance due to the repulsion force. If both spheres are insulating, the sphere with greater charge will exert a stronger force and come to rest closer to the common attachment point.

Due to the repulsion force and if both spheres are insulating, the sphere with greater charge will exert a stronger force and come to rest closer to the common attachment point.

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Explanation:

The amount of CD is 35 g, and the amount of AC is 40 g.

Explanation:

AB + CD \rightarrow AC + BDAB+CD→AC+BD

The law of conservation of mass states that in any chemical reaction, the total mass of the reactants must be equal to the total mass of the products.

In this reaction, we know the mass of one reactant (AB, 15 g) and the mass of one product (BD, 10 g). In order to have the same total mass on the left side and on the right side of the equation, the mass of AC must be 5 g more than the mass of CD. We see that the only choice that satisfies this condition is:

The amount of CD is 35 g, and the amount of AC is 40 g.

In fact, if we assume these masses are correct, we have:

- on the reactant side: m(AB)+m(CD)= 15g + 35g = 50g

- on the product side: m(AC)+m(BD)= 40g + 10g = 50g

so, we have the same mass on both sides of the equation, and the law of conservation of mass is satisfied.

Answer:

B is  the answer on edge

Explanation:

B: The amount of CD is 35 g, and the amount of AC is 40 g.

Answer:B

Explanation:

.03 of an hr is 2 mins and if it takes 2 mins to drive 4 miles enter it in pace calulator you are going 120mph so the closest to 120 is 133mph

The kid is breaking the speed limit of 45 miles/hr since he is going at 133.3 miles/hr.

Speed is the ratio of distance travelled to time taken. It is given by:

Speed = distance / time

Since the distance to the mall is 4 miles, the time taken is 0.03 hours, hence the speed is:

Speed = distance / time

Speed = 4 miles / 0.03 hours

Speed = 133.3 miles/hr

Hence the kid is breaking the speed limit of 45 miles/hr since he is going at 133.3 miles/hr.

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Answer:

Acceleration = 0.2m/s²

Explanation:

Given the following data;

Mass = 1000kg

Force = 200N

To find acceleration;

Force is given by the multiplication of mass and acceleration.

Mathematically, Force is;

\( F = ma\)

Where;

F represents force.

m represents the mass of an object.

a represents acceleration.

Making acceleration (a) the subject, we have;

\(Acceleration (a) = \frac{F}{m}\)

Substituting into the equation;

\(Acceleration (a) = \frac{200}{1000}\)

Acceleration = 0.2m/s²