A square, four-legged table with a weight of 400 n rests on an even concrete floor. Assuming the weight is evenly distributed, what is the direction and magnitude of the normal force between the floor and each foot of the table?.

Answer:

The spring constant will be "1333.33 N/m".

Explanation:

The given values are:

Mass,

m = 1.2 kg

Displacement compression,

x = 0.15 m

Block's velocity,

\(v_i=5 \ m/s\)

As we know,

⇒  \(E_i=E_f\)

or,

⇒  \(K_i+v_i=K_f+v_f\)

⇒  \(\frac{1}{2}mv_i^2+0=0+ \frac{1}{2}Kx^2\)

So,

⇒  \(K=\frac{mv_i^2}{x_2}\)

On substituting the values, we get

⇒       \(=\frac{1.2\times 5\times 5}{0.15\times 0.15}\)

⇒       \(=\frac{30}{0.0225}\)

⇒       \(=1333.33 \ N/m\)

If his resistance is 2200 Ohm , the fatal voltage is 110 Volt.

The relation between resistance, voltage, and current is given by the Ohm law:

V = I R

Where:

V = voltage

I = current

R = resistance

Parameters from the problem are:

I = current = 50 mA = 0.05 A

R = resistance = 2200 Ohm

Hence,

V = IR

  = 0.05 x 2200 = 110 Volt

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Answer:

120km

Explanation:

it will covered 120km

The force would be the same. Since gravitational force only varies with object mass and separation

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Answer: B. The geomagnetic north is similar to the south pole of a magnet

Explanation:

Answer:

1.36×10^-21 N.

Explanation:

The magnitude of the force that the electric field exerts on the electron can be calculated using the formula:

F = qE

where F is the force, q is the charge of the electron, and E is the electric field strength.

Substituting the given values, we get:

F = (1.60×10^-19 C) × (0.00850 N/C)

F = 1.36×10^((-21) N

Therefore, the magnitude of the force that the electric field exerts on the electron is 1.36×10^-21 N.

Answer:

The correct answer is A. Thermal energy (heat) is defined as the sum of all the kinetic energies of all the particles in an object.

The power output of  2.00 kg object is accelerated uniformly from rest to 3.00 m/s while moving 1.5 m across a level frictionless surface is 24.09 watts.

In science, power is the time required to do work or provide energy, expressed as work done W or energy transferred divided by the time interval t - or W/t. A fixed amount of work can be done for a long time with a low-powered engine, or for a short time with a high-powered engine. The unit of power is work (or energy) per unit of time. Such as foot pounds per minute, joules (or watts) per second, and ergs per second. Force can also be expressed as the product of the force required to move an object and the object's velocity in the direction of the force. If the magnitude of the force F is measured in pounds and the velocity ν is measured in feet per minute, then the power is equal to Fν foot pounds per minute.

Given,

Mass of object (m) = 2.00 kg

Distance covered (s) = 1.5 m

Velocity of object (v) = 3.00 m/s

For calculation of acceleration:

v² = u² + 2as

3² = 0 + 2 × a × 1.5

9 = 3a

a = 2 m/s²

For calculation of time:

s = ut + ¹/₂at²

1.5 = 0 × t + ¹/₂ × 2 × t²

1.5 = t²

t = 1.22 sec.

For calculation of gravitational force:

F = mg

F = 2 × 9.8

F = 19.6 N

For calculation of work done:

W = F × s

W = 19.6 × 1.5

W = 29.4 J

For calculation of power output:

P = W/t

P = 29.4/1.22

P = 24.09 watts

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Answer:

B

Explanation:

The car battery has a rating of 89Ah, which implies that it can supply a current of 89 A for 1 hour before being completely discharged. If you leave your headlights on until the battery is completely dead, the amount of charge that leaves the battery is 320400 coulombs.

The amount of charge that leaves the battery is given by:

C = I × t

where C is the charge, I is the current, and t is the time taken.

In this case, the current I = 89 A and the time t = 1 hour = 3600 s

Therefore, the charge that leaves the battery is:

C = 89 A × 3600 s

C = 320400 C

Therefore, 320400 coulombs is The amount of charge that leaves the battery.

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Answer:

the frequency of the hummingbird is 80 Hz.

Explanation:

Given;

number of times the hummingbird beats its wings, n = 4,800 times

the duration of this motion, t = 1 minute

The frequency of the hummingbird wings is calculated as follows;

\(frequency = \frac{number \ of \ times}{time \ taken} \\\\frequency= \frac{4,800}{1 \min \ \times \ 60s} = 80 \ Hz\)

Therefore, the frequency of the hummingbird is 80 Hz.

Mount Nevado,  Huascarán in Peru has the lowest gravitational acceleration, at 9.7639 m/s2.

What is gravitational acceleration ?

An object in free fall in a vacuum experiences gravitational acceleration. This is the gradual increase in speed brought on solely by the gravitational pull. No matter their masses or compositions, all bodies accelerate at the same rate in a vacuum; the measurement and analysis of these rates is known as gravimetry.

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The wavelength of the standing wave created in the string is 31.2 cm.

The speed of the transverse wave on a string will be given by:

v = sqrt(T/μ)

where T is tension in the string and μ is linear mass density of the string (mass per unit length). We can find the linear mass density of the string by dividing the mass of the string by its length:

μ = m/ℓ

where m is mass of the string and ℓ is its length.

Substituting the given values, we get:

μ = 13.1 g / 1.97 m = 6.64 × 10⁻³ kg/m

The frequency of the fourth harmonic of the string is given by:

f = 4v/λ

where λ is wavelength of the standing wave.

We can find v by using the formula for speed and the given values of T and μ:

v = sqrt(T/μ) = sqrt(9.51 N / 6.64 × 10⁻³ kg/m)

= 70.3 m/s

Substituting the values of v and f into the formula for wavelength, we get:

λ = 4v/f = 4(70.3 m/s) / f

So we just need to find the frequency of the fourth harmonic. The frequency of the nth harmonic of a string is given by:

f_n = nv/2ℓ

where n is the harmonic number and ℓ is the length of the string. So for the fourth harmonic, we have:

f_4 = 4v/2ℓ = 2v/ℓ = 2(70.3 m/s) / 1.97 m

= 142 Hz

Substituting this value into the formula for wavelength, we get:

λ = 4(70.3 m/s) / (142 Hz)

= 31.2 cm

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When your muscles contract to move your body, such as during walking, work is done, and work requires energy. Based on the Law of Conservation of Energy, this energy comes from c) "Mechanical energy stored in ATP."

Energy is a fundamental concept in physics that describes the ability to do work. When your muscles contract to move your body, work is done, and this work requires energy.

The statement, "When your muscles contract to move your body, such as during walking, work is done, and work requires energy," is absolutely true. However, the question is where this energy comes from. The Law of Conservation of Energy states that energy cannot be created or destroyed; it can only be converted from one form to another.

So, from where does this energy come? Option A, "New energy is created by our cells whenever we need it," is incorrect because it violates the Law of Conservation of Energy. Energy cannot be created out of nothing. Option B, "Heat," is also incorrect because the energy generated by muscle contractions is not heat energy.

The correct answer is C, "Mechanical energy stored in ATP." ATP (adenosine triphosphate) is a molecule that stores energy in the cells of our bodies. When our muscles contract, ATP is broken down to release the stored energy, which is used to power the muscle contractions. This stored mechanical energy is converted into kinetic energy, which is the energy of motion that is used to move our bodies.

Option D, "Chemical energy," is not a complete answer because it does not specify where the chemical energy is stored. In this case, the chemical energy is stored in ATP molecules.

In conclusion, the energy that is required for muscle contractions during movement comes from the mechanical energy stored in ATP molecules in our cells. The Law of Conservation of Energy is fundamental to understanding where energy comes from and how it is used in our bodies and in the world around us.

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Astronomers would use a technique called "redshift" to determine the distance to a remote quasar.

Redshift is the phenomenon of an object's light or other electromagnetic radiation shifting to longer wavelengths as the object moves away from an observer. This shift is used to calculate the relative speed of the quasar and its distance from Earth.

A quasar is a supermassive black hole in the center of a distant galaxy that consumes gas. Since astronomers first discovered quasars in 1963 as objects that looked like stars but emitted radio waves, the term "quasar" stands for "quasi-stellar radio source."

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Answer:

240 J

Explanation:

240 N will compress the spring    2 meters     ( 240 N / 120 N/m = 2 m)

EPE = 1/2 k x^2 = 1/2 (120 N/m) ( 2 m)^2  =240 J

The elastic potential energy stored in the spring is 240 joule.

Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases. If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised.

Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the elevated ball has more potential energy as they become further apart.

Force constant: k = 120N/m.

Applied force: F = 240 N.

Hence,  compression in length = F/k = 240/120 m = 2 m.

The elastic potential energy stored in the spring = kx²/2

= 120 × 2²/2 joule

= 240 joule.

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Answer:

over weight

Explanation:

being over weight

hope this helps

Answer:

C. diet pills

Explanation:

Diet pills affect the body and they can cause serious side effects.

Diet pills represent the type of diet that would most likely cause these types of health problems or difficulties (Option C).

Diet pills are different types of medications that can be used to reduce weight and improve the physical body state.

In conclusion, diet pills represent the type of diet that would most likely cause these types of difficulties (Option C).

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Answer:

Explanation:

Newton's Second Law Lab. 10/12/2012

Analysis of Error: Some sources of error that could have affected the acceleration are un-precise tools,friction, air resistance, air coming from the air conditioner, and mass of the string. These factors were not taken into consideration and could have affected the acceleration.

Answer:

how can international relations advance our country's politics?​

Explanation:

The correct option is A, accelerate the rotation of the moon across the sun.

The Sun is a star that is at the center of the solar system. It is classified as a G-type main-sequence star, which means that it is a relatively average star in terms of size, temperature, and luminosity. The Sun is about 4.6 billion years old and is expected to remain stable for another 5 billion years or so before it begins to run out of fuel and eventually dies.

The Sun is a massive object, with a diameter of about 1.39 million kilometers, which is about 109 times the size of Earth. It is made up mostly of hydrogen and helium, which undergo nuclear fusion in its core, producing enormous amounts of energy that radiate out into space as light and heat. This energy drives the weather and climate on Earth, and also powers all life on our planet.

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Complete Question:

you are a superman (or superwomen). With what terrific-human feat may want to you growth the length of a tidal day?

a. accelerate the rotation of the moon across the sun

b. increase the mass of the moon

c. speed up the rotation of the earth around its axis

d. slow the rotation of the moon across the earth

e. decrease the mass of the earth

Answer:

0.0227528381

Explanation:

2.389/105

The amount of heat absorbed by the engine from its heat-source reservoir is 107.692 kW.

In order to solve the given problem, let's start by calculating the Carnot coefficient of performance of the Carnot refrigerator.

The Carnot coefficient of performance of the Carnot refrigerator is given by the following relation:

\($$\omega_{Carnot} = \frac{T_0}{T_1 - T_0}$$\)

Where\(,$\omega_{Carnot}$\) = Coefficient of performance of the Carnot refrigerator

$$\omega_{Carnot} = \frac{T_0}{T_1 - T_0}$$\(

$$\omega_{Carnot} = \frac{T_0}{T_1 - T_0}$$\) = Temperature of the low temperature reservoir = 0 °C = 273 K

\($T_1$\) = Temperature of the high temperature reservoir

Let's substitute the given values in the above equation.

\($$0.6 \omega_{Carnot} = 0.6 \times \frac{273}{T_1 - 273}$$\)

\($$\implies T_1 - 273 = \frac{273}{0.6 \omega_{Carnot}}}$$\)

\($$\implies T_1 = 273 + \frac{273}{0.6 \omega_{Carnot}}}$$\)

\($$\implies T_1 = 455 K$$\)

Therefore, the temperature of the high temperature reservoir of the Carnot refrigerator is 455 K

.Now, let's calculate the thermal efficiency of the Carnot engine.

The thermal efficiency of the Carnot engine is given by the following relation:

\($$\eta_{Carnot} = 1 - \frac{T_0}{T_1}$$\)

Where,\($\eta_{Carnot}$\) = Thermal efficiency of the Carnot engine

\($T_0$\)= Temperature of the low temperature reservoir = 0 °C = 273 K

\($T_1$\) = Temperature of the high temperature reservoir

Let's substitute the given values in the above equation.

\($$0.6 \eta_{Carnot} = 0.6 \times \left(1 - \frac{273}{T_1}\right)$$\)

\($$\implies 0.6 \eta_{Carnot} = 0.6 - \frac{273}{T_1}$$\)

\($$\implies 0.6 \eta_{Carnot} = \frac{0.6T_1 - 273}{T_1}$$\)

\($$\implies 0.6 \eta_{Carnot} = \frac{0.6 \times 455 - 273}{455}$$\)

\($$\implies \eta_{Carnot} = 0.325$$\)

Therefore, the thermal efficiency of the Carnot engine is 0.325.

Now, let's calculate the amount of heat absorbed by the engine from its heat-source reservoir.

The rate at which the heat is extracted from the low temperature reservoir by the Carnot refrigerator is given as follows:

\($$Q_{extracted} = \omega_{Carnot} \times W = 0.6 \omega_{Carnot} \times 35 \ \text{kW} = 21 \ \text{kW}$$\)

Here, the work produced by the Carnot engine is used by the Carnot refrigerator in extraction of heat from a heat reservoir at 0 °C.

Now, the rate at which the engine delivers work to the surroundings is the rate at which the engine absorbs heat from its heat-source reservoir. This is given by the following relation:

\($$W = \eta_{Carnot} \times Q_{absorbed}$$\)

\($$\implies Q_{absorbed} = \frac{W}{\eta_{Carnot}}$$\)

\($$\implies Q_{absorbed} = \frac{W}{\eta_{Carnot}}$$\)

\($$\implies Q_{absorbed} = 107.692 \ \text{kW}$$\)

Therefore, the amount of heat absorbed by the engine from its heat-source reservoir is 107.692 kW.

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It would weigh less bc the higher you are the less gravity there is.

Answer:

Manganese (iv )oxide is a slow depolarizer and polarization occurs with a large current, on resting, the depolarization returns the p.d of the dry cell.

In atrial flutter, atrial contraction occurs at such a rapid rate that discrete P waves separated by a flat baseline cannot be seen.

Answer:

40 seconds. 15,509/390=40.

P.s.

Can you please give me brainliest for my next rank.

Answer: A skier’s most important piece of equipment is Ski boots.

Explanation: To find the answer, we need to know about the ski boots.

Thus, we can conclude that, a skier's most important equipment is Ski boots.

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Ski boots are a skier's most essential piece of gear.

We must understand the ski boots in order to determine the solution.

So, it stands to reason that ski boots are a skier's most essential piece of gear.

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The correct answer of the question is P (type B is the 2nd hottest) , R (F is 4th in hottest) and Q (type K is second coolest).