While moving a box 10.0 m across the floor, Sam pushes with a force of 150 N to the right. The force friction acting on the box is 25.0 N to the left. What is the net work done on the box by these 2 forces

Answer:

1700 Joules

Explanation:

Work=force x distance

Force = 170 kg

Distance= 10 Meters

170 x 10 = 1700 Joules of work

Explanation:

100Hz wave have longer wavelength and hence more speed

Answer:

Gravity

Explanation:

In astronomy, dust and gas get pulled together by gravity forming Nebula's, famous nebula's include the Crab Nebula, Orion Nebula and Helix Nebula.

Most of the Nebula's consist of hydrogen.

Answer:

The answer is specific heat.

Explanation:

The amount of energy for 1 gram of a substance to be raised one degree is called specific heat because it involves energy and temperature going up.

Heat is a form of energy, so it is the most appropriate name.

I hope this helps! :)

The amount of heat required to increase the temperature of 1 gram of a substance by 1 degree Celsius (°C) is known as specific heat. Since water has a higher specific heat than other substances, it requires more energy to raise its temperature. Thus, option D is correct.

One gram of a substance's temperature can be raised by one degree Celsius by applying a certain amount of heat, or specific heat.

Calories or joules per gram per Celsius degree are typically used as the units of specific heat. One calorie (or 4.186 joules) per gram per degree Celsius, for instance, is the specific heat of water.

Specific heat is the quantity of energy required to raise a substance's temperature by one degree in order to raise a gram of it.

Therefore, Specific heat term is used to describe the amount of energy it takes for 1 gram of a substance to be raised one degree in temperature.

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Answer:

The answer is D or Fertilizer, sorry for the late answer

Explanation:

Answer:

D Fertilizer hope this helps ..

Explanation:

Answer:

2m

Explanation: a crest is a disturbance

Answer:

I think its 4m, but don't quote me. hope I helped

Answer:

A. Melting

B. Freezing

C. Condensing

D. Boiling

Explanation:

Answer: OLEDs

Explanation:

The nanotechnology uses the surface of the carbon materials to generate the electricity. The evaporation of water on the surface of carbon materials helps in generation of electrical energy due to generation of thermal energy.

OLEDs can be defined as solid-state devices that comprises of organic molecules like carbon that will create electricity by exposing a surface for generation of thermal energy.

Answer:

A. light waves

Explanation:

just learned this in science class lol

by space it means in a vacuum. Light waves, or radiation, are the only waves capable of going through a vacuum.

Answer:

A

Explanation:

Answer:

Clarify any confusing information in the instructions.

Purchase the equipment and chemicals you will need.

Explanation:

Steps of a scientific investigation include identifying a research question or problem, forming a hypothesis, gathering evidence, analyzing evidence, deciding whether the evidence supports the hypothesis, drawing conclusions, and communicating the results.

Answer:

C. Clarify any confusing information in the instructions

Explanation:

This is not a multiple choice question, however, all of these are correct. The question above is looking for the BEST step to take before beginning.

Verified as correct on e2020

Answer:

Check Explanation

Comprobar explicación

Explanation:

English Translation

Indicate what a specific property of matter is. Also explain why the specific properties of matter are useful compared to the general ones.

Solution

The specific properties of matter are properties that describes the intensive properties of the system. They are properties that do not depend on or change with the extent or size of the system. They are usually obtained by dividing the generalised properties or extensive properties by the extent or size of matter to make them independent of size/extent/Mass.

Examples of specific properties include specific heat capacity, specific volume etc. They usually have units of general units/Mass units.

The specific properties of matter are more important than the general ones because

- They help in general comparisons of the properties of different materials. They are used to rank, classify and compare properties of different materials.

- They are used in reference table/data to easily record easily accessible properties of matter. It helps to record standards that are general and independent of sizes/extents/Mass, thereby keeping the reference table/data/chart precise and concise.

- They provide us with values that are easy to memorize and remember, unlike trying to cram the different properties of different masses/sizes of matter.

In Spanish/En español

Las propiedades específicas de la materia son propiedades que describen las propiedades intensivas del sistema. Son propiedades que no dependen ni cambian con la extensión o el tamaño del sistema. Por lo general, se obtienen dividiendo las propiedades generalizadas o las propiedades extensivas por la extensión o el tamaño de la materia para hacerlas independientes del tamaño / extensión / masa.

Los ejemplos de propiedades específicas incluyen capacidad calorífica específica, volumen específico, etc. Usualmente tienen unidades de unidades generales / unidades de masa.

Las propiedades específicas de la materia son más importantes que las generales porque

- Ayudan en las comparaciones generales de las propiedades de diferentes materiales. Se utilizan para clasificar, clasificar y comparar propiedades de diferentes materiales.

- Se utilizan en la tabla / datos de referencia para registrar fácilmente propiedades de materia fácilmente accesibles. Ayuda a registrar estándares que son generales e independientes de tamaños / extensiones / masa, manteniendo así la tabla / datos / tabla de referencia precisa y concisa.

- Nos proporcionan valores que son fáciles de memorizar y recordar, a diferencia de tratar de agrupar las diferentes propiedades de diferentes masas / tamaños de materia.

Hope this Helps!!!

¡¡¡Espero que esto ayude!!!

Answer:

Matter in the universe is made up of atoms, particles if electrons were to be stationary, they would have fallen into the nucleus because of electrostatic force acting on them destroying very existence of an atom we know.

Answer:

V= 125volts

Explanation:

R =25ohms

I = 5 amp

V = ?

t = 36seconds

V = IR

V = 5× 25

V= 125volts

Q = It

Q = 5×36

Q = 180 coulombs

Q is the amount of charge.

Answer:

c ok      

Explanation: right?

Answer:

16

Explanation:

Answer:20kgm/s

Explanation:

Mass=10kg

Velocity=2m/s

Momentum=mass x velocity

Momentum=10 x 2

Momentum=20

Momentum=20kgm/s

The object with mass m when moving with the velocity, its momentum can be calculated. The momentum of the object A is 20 kg.m/s.

Momentum is the product of mass and velocity of a moving object.

If the momentum is p, the mass of the object is 10 kg and the velocity is 2.0 m/s, then the momentum will be

p = 10 × 2.0

p = 20 kg.m/s

Thus, the momentum of the object A is 20 kg.m/s

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Explanation:

hope this helps you...........

The magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field is 0.0256 Weber.

The magnetic field is the region of space where a charged object experiences magnetic force when it is moving.

The formula for magnetic flux is given as;

φ = BAcosθ

Given, a rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.40 T. The length of the loop L is 0.16 m and its width w is 0.040 m.

Area of the loop = L x w

                        A  = 0.16 x 0.040 m

                         A = 0.0064 m²

So, flux will be

φ = 0.4 x  0.0064 x cos90°

φ = 0.00256 Wb

Thus, magnetic flux through the loop when the plane of the loop is perpendicular to the magnetic field is 0.0256 Weber.

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Answer:

C

Explanation:

15. 20

x4. x4

60. 80

80km/h

Answer:

80km/h

Explanation:

solution

given

d=20km

t=15min/60min=0.25h

s=?

s=d/t

s=20km/0.25h

s=80km/h

Answer:

23 cm from the mirror

Explanation:

Answer:

the answer is at the BOTTOM OF THEIR QUESTION

Explanation:

IT IS CORRECT BTW

Answer:

33 Celsius is 306.15 in absolute temperature

Answer:

Explanation:

The question in english is:

A ray of light falls under an angle of incidence of 30 degrees on a flat surface that separates two transparent materials with indexes of refractions 1.60 and 1.40, respectively.

Calculate the angle of refraction (from the environment with the lower index of refraction)

Solution

According to Snell's Law :

[tex]n_{1}sin(\theta_{1})=n_{2}sin(\theta_{2})[/tex]

Where:

[tex]n_{1}=1.6[/tex]  is the first medium index of refraction

[tex]n_{2}=1.4[/tex]  is the second medium index of refraction

[tex]\theta_{1}=30\°[/tex]  is the angle of the incident ray

[tex]\theta_{2}[/tex] is the angle of the refracted ray

We need to find [tex]\theta_{2}[/tex] from the equation above,

[tex]\theta_{2}=sin^{-1}(\frac{n_{1}}{n_{2}}sin\theta_{1} )[/tex]

[tex]\theta_{2}=sin^{-1}(\frac{1.6}{1.4}sin(30\°)[/tex]

[tex]\theta_{2}=34.84\°[/tex]

Answer:

Harmful bacteria are called pathogenic

Explanation:

Harmful bacteria are called pathogenic bacteria because they cause disease and illnesses like strep throat, staph infections, cholera, tuberculosis, and food poisoning.

Answer:bowling ball has greater kinetic energy

Explanation:

Kinetic energy of bowling ball:

mass=m=5kg

Velocity=v=6m/s

Kinetic energy =ke

Ke=0.5 x m x v x v

Ke=0.5 x 5 x 6 x 6

Ke=90J

Kinetic energy of ship:

mass=m=120000kg

velocity=v=0.02m/s

Ke=0.5 x m x v x v

Ke=0.5 x 120000 x 0.02 x 0.02

Ke=24J

The bowling ball has greater kinetic energy than the ship.

The kinetic energy of an object is the work an object can do by its motion. Kinetic energy is a scalar quantity as it does have magnitude only.

When work is done, energy is transferred, and the object moves at a new speed. The energy is transferred kinetic energy, which depends on the mass and speed.

The SI unit of kinetic energy is Joule and the CGS unit of kinetic energy is erg. The expression of kinetic energy that is used to calculate it is:

K.E. = (1/2) mv²

The mass and the velocity of the bowling ball are 5 Kg and 6 m/s respectively.

The kinetic energy of the bowling ball = (1/2) × 5× (6)² = 90 J

The mass and the velocity of the ship are 120000 Kg and 0.02 m/s respectively.

The kinetic energy of the bowling ball = (1/2) × 120000× (0.02)² = 24 J

Therefore, the kinetic energy of the bowling ball is greater than the ship.

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Answer:

The speed of the car 6 s after starting to move is 12 m/s.

Explanation:

A car started from rest and moved along a straight road with constant acceleration of [tex]2\ m/s^2[/tex] for 6 seconds.

It is required to find the speed of the car 6 s after starting to move. Let v is the final speed of the car.

The relation between speed, acceleration and time is given by :

[tex]v=u+at[/tex]

u = 0

[tex]v=at\\\\v=2\ m/s^2\times 6\ s\\\\v=12\ m/s[/tex]

So, the speed of the car 6 s after starting to move is 12 m/s.

Your question is incomplete. Please find below the complete question.

B. Its acceleration is 9.8 m/s^2 down.

Acceleration, is the rate at which speed adjustments with time, in phrases of pace and path. A point or an item moving in a line is expanded if it hurries up or slows down.

We always have a vertical (downward ) acceleration of 9,8 m/s^2. The horizontal acceleration is zero in case you overlook friction forces. The vertical issue of speed is zero on the top of the trajectory whilst the horizontal component isn't like zero in any other case the apple will no longer arrive at your buddy.

You toss an apple across the room to a friend. Which of the following statements is true about the apple at the top of its trajectory?

A. Its acceleration is zero.

B. Its acceleration is 9.8 m/s2 down.

C. The horizontal component of its velocity is zero.

D. The vertical component of its velocity is 9.8 m/s down.

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Answer:

The cup with 0.5L

Explanation:

To know what amount of water you take into account the specific heat of the water. The specific heat of water is:

[tex]c_{water}=4186\frac{J}{kg\°C}[/tex]

Thus, 4186 J of energy are needed to icrease the temperature of 1 kg water in 1°C. Then, more grams of water will need more energy.

You have that one cup has 0.5 L and the other one has 750mL = 0.75L

The second cup of water will need more heat because the amount of water contained in the second cup is greater than in the first cup with 0.5L

Answer:

white

Explanation:

This experiment causes lines of different colors because the constructive interference depends on the wavelength, so for different wavelength, the position of the maximum will be different.

Now, in diffraction fo a single slit we always have a central maximum (for all the colors)

This means that after the diffraction, we will have that all the colors have a maximum in the center, which will produce white light again, then the color of the central image is white

Answer:

Explanation:

Using the principle of conservation of energy, the potential energy is converted to kinetic energy, assuming any losses.

Kinetic energy is given by ½mv²

Potential energy is given by mgh

Where m is the mass, v is the velocity, g is acceleration due to gravity and h is the height.

Equating kinetic energy to be equal to potential energy then

½mv²=mgh

V

Making v the subject of the formula

v=√(2gh)

Substituting 9.81 m/s² for g and 20 m for h then

v=√(2*9.81*20)=19.799 m/s

Rounding off, v is approximately 20 m/s

Answer:

19.8 m/s

Explanation:

During the motion of a pemdulum bob, it casually converts kinetic energy to potential energy and vice versa.

A pendulum bob reaches its maximum speed at a position closest to its equilibrium position and has its lowest when it is farthest from the equilibrium position.

The maximum speed of a pendulum bob based on the mass involved and the maximum displacement from the equilibrium position is obtained from

Maximum kinetic energy = Maximum potential energy

Maximum potential energy occurs at the farthest point from equilibrium, that is,

P.E(max) = mgh

Maximum kinetic energy = ½mv²

½mv² = mgh

v = √2gh

g = acceleration due to gravity = 9.8 m/s²

h = farthest height from equilibrium position = 20 m

v = √(2×9.8×20) = 19.8 m/s

Hope this Helps!!!

Answer:

1,211.1 kg.

Explanation:

the force of gravity is less on the moon than on earth, so if the man can lift 200kg on earth, he could lift a greater amount on the moon because there is less resistance from gravity.

To know the amount of mass he can lift on the moon, we first need to know the amount of weight that is equivalent to those 200kg here on earth. This because the weight of the object is equal to the force that must be applied to lift it, and that force is applied by the man and it will be the same here and on the moon.

We calculate weight using the formula:

[tex]w=mg[/tex]

where [tex]w[/tex] is the weight of the object (the force with which the earth attracts the object) [tex]m[/tex] is the mass and g the acceleration of gravity.

so

[tex]w=200g[/tex]

for earth the acceleration due to gravity is:  [tex]g=9.81m/s^2[/tex]

thus:

[tex]w=(200kg)(9.81m/s^2)\\w=1962N[/tex]

now we use this value to calculate the mass he can lift on the moon, since for the moon [tex]g=1.62m/s^2[/tex].

we use the same equation, w =mg substituting w = 1962N and [tex]g=1.62m/s^2[/tex]:

[tex]w=mg\\\\1962N=m(1.62m/s^2)\\\\m=\frac{1962N}{1.62m/s^2}\\\\ m=1,211.1kg[/tex]

he can lift 1,211.1 kg.

You can also find the result using the approximate value of the acceleration of gravity on the moon as g/6, where g is the acceleration on earth.