Can someone explain how exactly to calculate the net force? Do you subtract the smaller number from the larger number? Any help would be appreciated!

Answer:

Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías

Explanation:

Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en calorías

Answer:

k

Explanation:

k

Answer:

When Tyrell's hands get warm the particles in his hands are moving faster or more rapidly.

Explanation:

Answer:

all of the above.Explanation:

Answer:

im not sure but i think b. cannot withstand the pressure...

if not all the above.

Explanation:

The capacitance of the air-filled capacitor is 0.118 πr² meter.

The ideal air-filled parallel-plate capacitor is a simple case of the capacitor. The capacitance of the air-filled capacitor can be determined as

C = ε₀ . A / d

where C is the capacitance of the capacitor, ε₀ is the vacuum permeability (8,85 x 10‾¹² F/m), A is the area of plate (m²) and d is a distance of the plate (m).

From the question above, we know that:

A = 4 x π x r²

C = 300 pF

By substituting the parameter, we get

C = ε₀ . A / d

300 x 10‾¹² = 8,85 x 10‾¹² . 4 x π x r² / d

d = 35.4 x 10‾¹² x π x r² / 300 x 10‾¹²

d = 0.118 πr² meter

where r is radius of plate.

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I would choose the option B.

F = ma

a = 75 / 25 = 3 m/s^2

The acceleration of the given object will be equal to 3 m/s². Therefore, option (B) is correct.

Acceleration of an object can be explained as the change in the velocity of an object with respect to time. The acceleration is a vector quantity as it exhibits magnitude and direction. Acceleration can be calculated from the 2nd derivative of the position of the object w.r.t. time.

The force is the product of the mass and acceleration, according to Newton's second law of motion.

F = ma

And,   a = F/m

From the above formula, we ca say that the acceleration is inversely proportional to mass.

Given, the force acting on the object, F = 75 N

The mass of the object, m = 25.0 Kg

The acceleration of the given object, a = 75/25 =3 m/s²

Therefore, the acceleration of the object is equal to 3 m/s².

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Answer: When it reaches what?

Explanation: Provide more info.

Answer:

1111 m

Explanation:

The following data were obtained from the question:

Height (h) = 500 m

Horizontal velocity (u) = 110 m/s

Horizontal distance (s) =?

Next we shall determine the time taken for the pallet to get to the target. This can be obtained as follow:

Height (h) = 500 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h = ½gt²

500 = ½ × 9.8 × t²

500 = 4.9 × t²

Divide both side by 4.9

t² = 500/4.9

Take the square root of both side.

t = √(500/4.9)

t = 10.1 s

Finally, we shall determine how far the pallet needs to be dropped in order to get to the target. This can be obtained as follow:

Horizontal velocity (u) = 110 m/s

Time (t) = 10.1 s

Horizontal distance (s) =?

s = ut

s = 110 × 10.1

s = 1111 m

Thus, the pallet must be dropped at a distance of 1111 m from the plane in order to get the target.

When the total mass of the system much larger then the measured accelerations would all be: halved.

In an Atwood's Machine, weight difference between the two hanging masses determines the net force acting on the system and this accelerates the hanging masses. Heavier mass is accelerated downward whereas the lighter mass is accelerated upward.

The second law states that the acceleration of an object depends on two variables that are: the net force acting on the object and the mass. The acceleration of an object depends directly on the net force acting on the object and inversely upon the mass.

F = m*a

Where, F denotes force, m is mass and a is acceleration. If force is doubled, acceleration also gets doubled whereas if the mass is doubled then acceleration becomes half.

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None of the games we publish on the website have answer keys available. It's Time for Something Different is one of Breakout EDU's catchphrases. By demonstrating that teachers don't always know the answers, we hope to prove this. Nothing has to be set up; the game is ready to start.

Hints are merely some information to help your group get over a barrier or view the data differently; they are not solutions. When the box is opened, Breakout EDU doesn't end.

Therefore, The game's facilitator, who is watching and observing the group, provides you with these tips.

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Answer:

D : Add more soil

Explanation:

Answer: No, constant speed does not mean constant velocity.

A classic often used example would be to consider a car driving in circles. If the speedometer reads say 20 mph the entire time, then the speed of the car is held constant (ie the same). But the velocity is changing because velocity measures direction along with speed. The car is changing direction as it moves in a circle.

There are two forces acting vertically downward at the rod's left end. The rod's angle with the horizontal is 0 degrees.

Thus, W = mg, where m is the rod's mass and g is the acceleration brought on by gravity, gives the weight of the rod. The force generated by a spring with a 42 N/m spring constant.

There are two forces acting vertically downward on the rod's right end: W = mg is the rod's weight. The force generated by a spring with a 32 N/m spring constant.

32 N/m*x =  42 N/m*x.

42x = 32x, 10x = 0.

Thus, There are two forces acting vertically downward at the rod's left end. The rod's angle with the horizontal is 0 degrees.

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The answer is zero.

According to below table we can see:

In spectrophotometry, absorbance and transmittance are measurements. Spectrophotometry determines how much radiant energy a substance absorbs at different light wavelengths. The technique is useful for determining the identity of an unknown substance as well as determining the concentration of a substance in a sample using a set of standards.

In the lab or in the field, a transmittance to absorbance table allows for quick conversion of transmittance values to absorbance.

Transmittance Absorbance (AU)

100%                      0

99%                              0.004

98%                              0.009

97%                              0.013

96%                              0.018

What is absorbance?

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Answer:

D. The overall enthalpy change for a reaction is independent of the route the reaction takes.

Answer: Hess's law states that the overall enthalpy change for a reaction is independent of the route the reaction takes. Option D is correct.

It is given Hess's law.

It is required to state the Hess's law.

Thermochemical equations can be manipulated to give the data chemical reactions. We find exactly how much energy will be absorbed or released by the reaction because we may face various explosions.

There are mainly two ways to calculate ΔH of any reaction. First If the reaction has ΔH then the reverse of the reaction will have opposite ΔH and the second is if double the ΔH of the substances, double the ΔH.

Therefore Hess's law states that the overall enthalpy change for a reaction is independent of the route the reaction takes.

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Answer:

155mEq/L Cl-

Explanation:

A Ringer’s solution contains the following concentrations of cations: 146 mEq/L of Na+, 5 mEq/L of K+, and 4 mEq/L of Ca2+.

As Cl- is the only counterion of those cations:

For Na, the molecule is NaCl and the mEq/L of Cl- = mEq of Na+. The Cl- of the first ion is 146mEq/L Cl-

For K+, The molecule is KCl, mEq Cl- = 5mEq/L Cl-

And, for Ca2+, The molecule is CaCl2 but the equivalents of Ca2+ = Equivalents of Cl- = 4mEq/L Cl-

The total concentration of Cl- are:

146 + 5 + 4 =

Answer:

If you are simply looking for the X component then the most applicable formula from the choices given is Tx + Ux+ Vx. This means that you will add all x-components. For example: If a man walking along the x-axis walks 10 meters to the right, 5 back and 2 meters forward, what is the resultant vector?

If the measure of arc AB is 130 degrees, the measure of angle APB is half of that since the angle subtended by an arc at the center of a circle is twice the angle subtended at any point on the circumference. Therefore, the measure of angle APB would be 65 degrees.

When dealing with a circle, the measure of an angle formed by two intersecting lines is related to the measure of the arc intercepted by those lines. In this case, the measure of arc AB is given as 130 degrees.

According to the inscribed angle theorem, an inscribed angle is equal to half the measure of its intercepted arc. Therefore, the angle APB, formed by lines AP and BP, will have a measure equal to half of the measure of arc AB.

Since arc AB measures 130 degrees, we can calculate the measure of angle APB by dividing 130 by 2, resulting in 65 degrees. Thus, the measure of angle APB is 65 degrees.

This relationship between arcs and angles is based on the properties and geometry of circles. By understanding these principles, we can determine the measures of angles based on given arc measures and vice versa.

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Since the resistors are in series, the equivalent resistance is the sum of the resistances:

Now, to find the current, let's divide the voltage by the total resistance:

The current through each resistor is the same because they are in series: 1.5 A.

To find the most powerful resistor, let's analyze the formula for the power in a resistor:

We can see that the greater the resistance, the greater the power, therefore the most powerful resistor is the 30 ohms resistor.

Explanation:

1. W = F x D

F = W/D

F = 120/6 = 20Newton

2. P. E = mgh

P. E = 1.5x10x2 = 30Joules

3. It means that the energy the body possesses at that point is 20Joules

It will take 2.857 minutes (or about 2 minutes and 51 seconds) for the fish to reach a temperature of 60 °C.

To determine the time it will take for the fish to reach a temperature of 60 °C, we can use the principle of heat conduction and the concept of temperature difference.

We know that the rate of heating by conduction is proportional to the temperature difference between the body and its surroundings. Therefore, we can write the following equation:

(T - Ts) = k * t

where T is the temperature of the fish, Ts is the temperature of the surroundings (boiling water), k is the proportionality constant, and t is the time.

Given that the initial temperature of the fish is 20 °C and it takes 5 minutes to reach 30 °C, we can substitute these values into the equation:

(30 - 100) = k * 5

-70 = 5k

Solving for k, we find k = -14.

Now we can use this value of k to find the time it will take for the fish to reach 60 °C:

(60 - 100) = -14 * t

-40 = -14t

Dividing both sides by -14, we get t = 2.857 minutes.

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Answer:

5.76 m/s

Explanation:

Applying,

S = d/t............... Equation 1

Where S = speed, d = distance, t = time.

For circular motion,

d = 2πr............ Equation 2

Where r = radius of the circular track, π = pie

Substitute equation 2 into equation 1

S = 2πr/t.............. Equation 3

From the question,

Given: r = 110 m, t = 2 minutes = (2×60) = 120 s

Constant: π = 3.14

Substitute these values into equation 3

S = (2×3.14×110/120)

S = 690.8/120

S = 5.76 m/s

The answer is 0.408.

According to the principle of conservation of energy when a friction force acts within an isolated system, we have

ΔE = ΔU + ΔK = -\(f_{Friction}\)d

= k\(x^{2}_{0}\)/2 = \(f_{Friction}\)d--------------------(1)

\(f_{Friction}\) = \(u_{k}\)N = \(u_{k}\) = \(u_{k}\)mg---------------------(2)

inserting eq. (2) into (1),

\(u_{k}\)=  k\(x^{2}_{0}\)/2mgd

inserting data given,

\(u_{k}\)= 0.408163265 ≈ 0.408

Therefore, the answer is:  0.408

What is coefficient of kinetic friction ?

A sophisticated method for determining the dynamic coefficient of friction. The sliding friction coefficient μk is the ratio of the friction force to the normal force experienced by an object moving on a dry, uneven surface.

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The block and the tabletop have a 0.41 coefficient of kinetic friction, according to the supplied statement.

The box can't move on its own because of static friction; this friction must be overcome by an opposing army that is large enough for the box to move. When surfaces are moving, a force called kinetic friction, also known as dynamic friction, fights the movement of the surfaces.

The parameters supplied:

Block's mass, m, is equal to 0.50 kg.

Spring extension, when x=0.2 m

100 N/m is the spring constant, K.

By using the law of conservation of energy, we can calculate the kinetic friction coefficient that exists between block and the tabletop, as illustrated below.

\(\begin{aligned}& \mathrm{Fd}=U_x \\& \mu \mathrm{mgd}=1 / 2 \mathrm{kx}{ }^2\end{aligned}\)

where;

μ is the coefficient of kinetic friction.

The block's and the tabletop's kinetic friction coefficient is:

\(\begin{aligned}& \mu_k=\frac{k x^2}{m g d} \\& \mu_k=\frac{100 \times 0.2^2}{2 \times 0.5 \times 9.8 \times 1} \\& \mu_k=0.41\end{aligned}\)

Therefore, the block's and the tabletop's value of kinetic friction is 0.41.

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When a bullet of mass 50 grams (0.05 kg) traveling vertically upward with a velocity of 280 m/s hits a block with a mass of 5 kg, it remains in the block as it moves up a (x)m height.

Initially, the bullet has a certain momentum given by its mass (0.05 kg) multiplied by its velocity (280 m/s). When the bullet hits the block and remains inside it, the momentum is conserved. The combined mass of the bullet and block after the collision is 0.05 kg + 5 kg = 5.05 kg. Using the principle of conservation of momentum, we can calculate the velocity of the combined system.

Next, we can use the conservation of mechanical energy to find the height. Initially, the system has kinetic energy due to the upward velocity of the bullet. After the collision, this kinetic energy is converted into potential energy as the block and bullet move upward. By equating the initial kinetic energy to the final potential energy, we can determine the height.

By solving the equations of conservation of momentum and conservation of mechanical energy, we can calculate the height to which the block and bullet rise after the collision. The specific calculations will depend on the exact values and the nature of the collision (whether it is perfectly elastic or partially inelastic).

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a) The force exerted by the spring on the mass is given by F = -kx, where F is the force, k is the spring constant, and x is the displacement of the spring from its equilibrium position.

b) The work done by the spring can be calculated using the work-energy principle.

The work done is equal to the change in the spring's potential energy, which is given by the formula W = (1/2)k(xf² - xi²), where W is the work done, k is the spring constant, xf is the final displacement of the spring, and xi is the initial displacement of the spring.

c) Plugging in the given values, xi = 0, xf = 58 cm = 0.58 m, and k = 55 N/m into the formula W = (1/2)k(xf² - xi²), we can calculate the work done as follows:

W = (1/2)(55 N/m)((0.58 m)² - (0 m)²)

W = (1/2)(55 N/m)(0.3364 m²)

W ≈ 9.30 J

a) The force exerted by a spring is proportional to the displacement from its equilibrium position and is given by Hooke's Law as F = -kx, where F is the force, k is the spring constant, and x is the displacement.

b) The work done by the spring is equal to the change in its potential energy.

Using the formula for the potential energy of a spring, U = (1/2)kx², the work done is given by W = ΔU = (1/2)k(xf² - xi²), where W is the work done, k is the spring constant, and xf and xi are the final and initial displacements of the spring, respectively.

c) Plugging in the given values, xi = 0 and xf = 0.58 m, and k = 55 N/m into the formula W = (1/2)k(xf² - xi²), we can calculate the work done.

Substituting the values yields W = (1/2)(55 N/m)((0.58 m)² - (0 m)²), which simplifies to W ≈ 9.30 J.

Therefore, the numerical value of the work done by the spring is approximately 9.30 Joules.

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The basic difference is that the motion of object remain unchanged in case of balanced forces while it changes when an object experiences unbalanced forces

When the forces experienced by an object have equal strength and are acting in opposite directions, they are known as balanced forces while the forces those differ in strength and are probably acting in any direction except opposite, they are known as unbalanced forces.

The balanced forces cancel out each other, and the motion of the object remains unchanged but unbalanced forces can change the velocity or direction of a moving object

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Answer: The correct option is A ( because the Earth is rotating, with the telescope attached to it).

Explanation:

A telescope is a device that is used mostly for viewing distant objects. It's an optical instruments as it's made up of lens and curved mirror depending on the type of telescope. The first telescope was invented by Hans Lippershey in 1608. It is used extensively in war,sea and astronomical discoveries.

Parts of a typical telescope includes:

--> the optical system: this is the most important part of a telescope. This determines the optical aperture of the telescope, how bright or how sharp the formed image would be. This can be a lens or a mirror.

--> Eyepiece: this magnifies the image formed.

--> Motorized drive system: these drive system are mounted with the telescope to aid in a quick and smooth movement while detecting, for example, celestial bodies. This part of the telescope is important as the telescope is mounted on the earth surface which rotates about its axis from west to east. Since the drive system is motorized, it can automatically move very smoothly from east to west at exactly the same rate that Earth is rotating from west to east, so it can continue to point at the object being observed.

Protons and Neutrons will give the mass number.

Protons and neutrons make up the nucleus of an atom, which is around by shells of electrons. The atomic number and mass number of an atom can be used to determine how many subatomic particles are present.

The atomic number of an element is the sum of the number of protons in each atom.

Keep in mind:

Atoms of different elements usually have different mass numbers, but they can be the same

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