A washing machine heats 10kg of water in each wash cycle. How much energy is saved by washing at 30'c instead of 50'c if the starting temperature of the cold water is 16'c? The specific heat capacity of water is 4200 J/Kg'c

The two equations you can use is in the picture.

Answer:

An electrical current is an electrical charge flowing around a circuit. Carried by billions of tiny particles called electrons, the charge is already in the wires.

Explanation:

There are three basic conditions for the electric current flow is to be given below:-

Explanation:

when we use our circular coil, the magnetic field will always be perpendicular to the area vector.thus, due to this, sin wt gives sin 90 degree and that gives 1, giving maximum linking of flux associated with the coil at any position .

Answer:

When we use a circular coil, the magnetic field will always be perpendicular to the area vector. Thus, due to this, sinωt ⁡ gives sin90∘ ⁡ and that gives 1 , giving maximum linking of flux associated with the coil at any position.

Explanation:

Answer:a sound wave in a certain material is 18.0 cm. The

frequency of the wave is 1900 Hz. What is the speed of

Explanation:

Answer: C

Combustion

Explanation:

Oxygen support combustion in a chemical reaction. Oxygen support burning.

In the absence of oxygen, combustion reaction can never take place. And when the supply of oxygen is being cut off, combustion reaction will automatically stop.

The correct option is C which is combustion

Answer:

This extra energy causes the string to vibrate more, which helps it move more air particles for a longer time. A string plucked with force has greater amplitude, and greater amplitude makes the sound louder when it reaches your ear. Volume depends on amplitude. Greater amplitude produces louder sounds.

Answer:

They are the same element.

Explanation:

Atom >>>>> Proton >>>> Neutron

A >>>>>>>> 8 >>>>>>>>> 10

B >>>>>>>> 8 >>>>>>>>> 12

From the table above we can see that both atoms have the same proton number.

Therefore, they are the same element because they have the same proton number which means that they have the same atomic number. The element in this case is existing as an isotope in that the atoms have the same proton number but different neutron number.

Answer: F = 19.2 N

Explanation: Given that the initial Force = 3.6N

The formula involved is

F = GMm/r^2

Substitute the force F

3.6 = GMm/r^2

If one of the masses is tripled and the distance between the masses is quadrupled. We have

3.6 = (G × 3Mm)/(4r)^2

Where G will be constant.

3.6 = 3GMm/16r^2

Separate the fraction of number

3.6 = 3/16 × GMm/r^2

Make GMm/r^2 the subject of formula

(3.6 × 16)/3 = GMm/r^2

19.2 = GMm/r^2

Therefore, the new force of attraction is 19.2 N

Answer:

an electromagnet

Explanation:

Answer:

the answer is actually D.

A Generator

the guy above me is wrong

......pls brainliest

Answer:

a - construct tsunami models

Explanation:

scientists cant effect on earthquakes directly, so its not 2 or 3

for 4 it wont help that much to study waves, so its better for them to make model of tsunami waves

Answer:

the arrows would point away from the north and towards the south.

Explanation:

magnetic field lines form loops around the magnet and they start at the north pole and end at the north pole, meaning that the arrows on a diagram would point away from the north and towards south.

*PLS READ: so sorry I made a mistake in my answer, the loops formed start at the north and END AT THE SOUTH POLE!! I'm so sorry :(

Answer:

The answer is C.) Arrows point away from Norht and towards South.

Explanation:

I took the K12 quiz. The picture is linked at the bottom of my answer. Hope you have an awesome day! Good luck!

Answer:  A

it's a sign that there might be something causing too much

current to flow in the circuit

Explanation: When a fuse blows, one of the causes may be short circuit. Also, it's a sign that there might be something causing too much

current to flow in the circuit leading to overloading. That is, drawing to much of power that can cause the metal inside the fuse to melt.

Option A is the best answer.

Answer:

11.) g = 3.695 m/s^2

12.) g = 8.879 m/s^2

13.) E = 8127 N/C

Explanation:

11.) Given that the

Mercury mass M = 3.3 × 10^23kg

Radius r = 2.44 ×10^6 m

Gravitational constant G = 6.67408 × 10^-11 m3kg-1 s^-2

Gravitational field strength g can be calculated by using the formula below

g = GM/r^2

Substitutes all the parameters into the formula

g = (6.67408 × 10^-11 × 3.3 × 10^23)/(2.44×10^6)^2

g = 2.2×10^13/5.954×10^12

g = 3.695 m/s^2

12.) Given that the

Venus mass M = 4.87×10^24kg

Radius r = 6.05 × 10^6 m

Using the same formula for gravitational field strength g

g = GM/R2

Substitute all the parameters into the formula

g = (6.67408 × 10^-11 × 4.87×10^24)/(6.05×10^6)^2

g = 3.25×10^14/3.66×10^13

g = 8.879 m/s^2

13.) Given that the

Charge = 2.26 nC = 2.26×10^-9

Distance d = 0.05m

Electric field strength E can be calculated by using the formula below

E = Kq/d^2

Where

K = electrostatic constant 8.99 × 10^9 Nm2/C2

Substitutes all the parameters into the formula

E = (8.99 × 10^9 × 2.26×10^-9)/0.05^2

E = 20.3174/2.5×10^-3

E = 8126.96 N/C

Answer:

a) transferring energy

Explanation:

A linkage is an assembly of parts connected together to control forces and movement. The connections between links are called joints and are used for ensuring movement, pure rotation or sliding.

Linkages provides a means in which kinetic energy is being transferred in different directions within a system. This Linkages can be used to Change force  direction, size of force applied or the motion created by the force.

Answer : a power supply of a circuit that was horizontal of the ladder where they controlled the circuit

Answer:

8.2 cm

Explanation:

1/f = 1/so + 1/si

1/10 = 1/45 + 1/si

1/si = 1/10 - 1/45

1/si = 9/90 - 2/90

1/si = 7/90

si = 90/7 = 12.86 cm.

since you said that the answer was not 12 them the lens must be concave with negative (minus) focal length

1/f = 1/so + 1/si

- 1/10 = 1/45 + 1/si

1/si = - 1/10 - 1/45

1/si = -9/90 - 2/90

1/si = -11/90

si = -90/11 = - 8.2 cm

- (read: minus or negative sign) indicates the image is in the same side of the object

hope its true and can help you

Answer:

1/f = 1/u + 1/v

f=10cm

u=45cm

v=? (Image distance)

1/v = 1/f - 1/u

1/v = 1/10 - 1/45

1/v = (9-2)÷ 90

1/v = 7/90

:. v = 90/7

v=12.86cm(image distance)

Answer: There is only one Sun in the galaxy … that is the thing that rises in the morning and sets at night. However, there is a use of “sun” to signify any old star … nobody knows exactly there might be trillions out there

Explanation:

Answer:

C. green light

Explanation:

Answer:

i think D

Explanation:

hope it helps

Explanation:

PRIMERO ENCUENTRAS LA COMPONENTE x

x = 5.9 m(cos62°) + 7.8 m(cos 29°) = 9.6 m

AHORA LA COMPONENTE y

y = 5.9 m(sen 62°) - 7.8 m(sen 29°) = 1.4 m

PARA ENCONTRAR DESPLAZAMIENTO:

R = [tex]\sqrt{(9.6 m)^{2} + (1.4 m)^{2}}[/tex] = 9.7 m

Answer:

b

Explanation:

did the quiz

Answer:

(B) The field lines go out of Earth near the South Pole, enter Earth in the North Pole, and are not aligned with the geographic poles.

Explanation:

Answer:

c no definite shape and volume

The one that is the characteristic of gas is that it has no definite shape or definite volume. The correct option is A.

Gases have a number of distinctive characteristics. The fact that they don't have a set shape means that they can fit into and take on the shape of any container that they occupy.

Due to their high compressibility, gases can occupy a variety of spaces. Because of this, they lack a fixed volume.

Gaseous particles have the potential to disperse and diffuse because they are constantly moving, moving erratically and quickly.

Additionally, compared to liquids and solids, gases have lower densities. They also have traits like high thermal expansion and the capacity to mix and separate with ease.

Thus, the correct option is A.

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Answer: d

One thirty-sixth of

Explanation: Gravitational field or gravitational field strength obeys the inverse square law. The gravitational field is inversely proportional to the square of the earth distance. That is,

g = Gm/r^2

Where r = distance.

If weather satellite is placed in orbit six times farther away from the earth's centre, gravitational field will be one thirty-sixth of its initial value.

Therefore, the gravitational field experienced by the satellite in orbit is one thirty-sixth of the field that it experienced on the ground.

Answer:

If pushing forward speeds it and pushing backward slows it down then force perpendicular to the object will keep it stationary and resist it's motion

Explanation:

Hope my efforts make impact in your life

Answer:

the answer is B

Explanation:

the law states that for every action there is an equal and opposite reaction. action and reaction forces always act on two two different bodies and therefore THEY ALWAYS EXIST IN PAIRS.

Answer:

-4000 N

Explanation:

1. First let's look at what we know.

Mass: 1000 kg

Initial velocity: 20 m/s

Final velocity: 0 m/s

Displacement: 50 m

2. Let's try and apply a Kinematics equation here.

Looking at what information we have, I would say that this is the best equation:

v[tex]f^{2}[/tex]=v[tex]o^{2}[/tex] + 2aΔx

3. Plug in the numbers.

0 = 400 + 2(a)(50)

0 = 400 + 100a

-400 = 100a

a = -4 m/s^2

4. Use ∑F=ma

∑F = (1000)(-4)

∑F = -4000 N

Answer:

About 2.19 seconds

Explanation:

[tex]d=v_ot+\dfrac{1}{2}at^2[/tex]

Since the ball is dropped from rest, there is no initial velocity, and you can write the following equation:

[tex]23.5=\dfrac{1}{2}(9.8)t^2 \\\\t^2\approx 4.79 \\\\t\approx 2.19s[/tex]

Hope this helps!

Answer:

Testing

Explanation:

Scientific methods are the steps that scientists follow to find an answer to the questions and to find solutions to the problems. There are certain steps which are followed chronologically in the scientific method:

Answer:

add energy

Explanation:

bc adding heat is energy which can make water turn into gas.

Answer: The direction of the force of friction is such that it opposes the direction of motion that an object would move if there were no frictional force acting on the object.

The direction of motion and direction of friction have to be  in opposite directions for a object to be in motion.

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

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