The strength of the force of friction between two solids is affected by:
A. the phase of matter.
B. the lengths of the two surfaces.
C. the properties of the two surfaces.
D. the colors of the solids involved.

Answer:to protect an electrical circuit from damage caused by excess current from an overload or short circuit.

Explanation:

Answer:

Calcium is less reactive than strontium.

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The work per unit charge required to move a charge between two points in an electric circuit electric potential difference. The right option is D) potential difference

Potential difference can be defined as the work done in moving a unit charge from one point to another in an electric field. The S.I unit of potential difference is volts (V).

From the question,

Hence, from the above, the right option is D) Potential difference

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Answer:

I can only explain using the formula

Explanation:

v=f

[tex]v = f \times lamda[/tex]

v is velocity

f is frequency

lamda is wavelength ( I don't have the symbol)

therefore velocity is the product of frequency and wavelength

And since period is the inverse of frequency;

Period (T)=1/f

so we can have v=lamda/T

That's what I think

The treatment most likely to use is Superficial External bean Radiation Therapy. Then the correct option is B.

The electromagnetic spectrum consists of the range of all types of EM radiation. Radiation is a packet of energy that travels and spreads out.

It has radio waves, infrared waves, visible light waves, ultraviolet rays, and microwaves.

They possess high energy even to penetrate deep within the material. the electromagnetic spectrum has a longer wavelength and less frequency.

Haley noticed a small spot on her skin that turned out to be skin cancer.

Surgery, radiation, chemotherapy, and hormone therapy can all be used to relieve signs and symptoms.

Medications may relieve symptoms such as pain and shortness of breath. Palliative treatment can be used.

The treatment most likely to use is Superficial External bean Radiation Therapy.

Then the correct option is B.

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Answer:

see below

Explanation:

first of all, you find the speed of sound in air

which is

speed = frequency x wavelength

so

speed = 200 x 1.5

speed = 300 m/s

speed remains the same in the same medium

so you can use speed and frequency to find wavelength

speed = frequency x wavelength

300 = 600 x wavelength

wavelength = 0.5 m

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Answer:

No external contact force.

Explanation:

Mass is defined as the amount of material an object contains, that doesn't change whether the object it on earth, on the moon or anywhere in space. Except the only force that is acting upon the body in gravity and they don't feel gravitational attraction towards the earth.

Answer:

Force = Mass x Acceleration. Since the acceleration of gravity is always constant at 9.81 m/s2, the force of gravity is constant as well, according to Newton. If the object is sitting motionless on the ground, then the net force (sum of all forces) acting on it is zero

Explanation:

sorry if it doesn't help

Answer:

v_f = 10.85 m/s

Explanation:

We will apply the law of conservation of momentum here:

[tex]m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{1f}+m_{2}v_{2f}\\[/tex]

where,

m₁ = mass of roller skater = 47 kg

m₂ = mass of bag = 6 kg

v_1i = initial speed of roller skater = 12 m/s

v_2i = initial speed of the bag = 0 m/s

v_1f = final speed of the roller skater = ?

v_2f = final speed of the bag = ?

Both the bag and the skater will have same speed at the end because kater is carrying the bag:

v_1f = v_2f = v_f

Therefore, the equation will become:

[tex](47\ kg)(12\ m/s)+(6\ kg)(0\ m/s)=(47\ kg)(v_{f})+(5\ kg)(v_{f})\\564\ N.s = (47\ kg+5\ kg)(v_{f})\\v_{f} = \frac{564\ N.s}{52\ kg}\\[/tex]

v_f = 10.85 m/s

Answer:

i know i'm way late. i'm so sorry but the answer is b not c. i just took the test and got 90% this one is wrong. it's B

Explanation:

just took the test.

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have a good day/ night

When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.

A parallel circuit is defined as the type of circuit in which the resistors are connected in parallel such that the current flowing through each of them is different.

Here,

The given circuit is connected in parallel combination of resistors. The current has different pathways to flow through. The voltage applied across each resistors will be the same.

Consider a parallel resistance circuit having a combination of n number of resistors with resistance R. The effective resistance of the parallel circuit can be given as,

1/Reff = 1/R₁ + 1/R₂ + 1/R₃ +....1/Rₙ

Since, the resistance is same on all resistors, we can write,

Reff = R/n

So, when adding a branch, the number of resistors, n increases. As a result, the effective resistance of the circuit decreases.

According to Ohm's law, as the resistance of a circuit decreases, the flow of current through the circuit increases.

Hence,

When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.

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Answer: 4. Windy, whooping weather

Explanation: b/c it is!

Answer:

Windy, whooping weather

Explanation:

thats the answer

Answer:

Decrease

Explanation:

Answer:

Compounds are two or more elements chemically combined in definite proportions by weight.

Mixtures are two or more substances not chemically combined.

Explanation:

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Answer:

A mixture can be separated by physical means

Explanation:

Answer:

No

Explanation:

Acceleration is the rate of change in velocity. Here the car maintains a constant speed, no change in velocity

Answer:

the final velocity of the bus is -20 m/s.

Explanation:

Given;

initial velocity of the bus, u = 20 m/s

deceleration of the bus, -a = 8 m/s²

time of motion, t = 5 s

The final velocity of the bus is calculated as;

v = u + at

v = 20 + (-8 x 5)

v = 20 - 40

v = -20 m/s.

Therefore, the final velocity of the bus is -20 m/s.

Answer:

Is a tree an example of chemical energy?

Take, for example, an apple tree. The tree absorbs light energy from sunlight, converting the light energy into chemical potential energy stored in chemical bonds. The tree uses this energy to build leaves and branches and fruit. ... Then it takes that heat and converts it into motion, or kinetic energy

Explanation:

Answer:

last one

Explanation:

Answer:

the Corona is about 10 million times less dense than sun's surface.this low density makesuch less bright than surface of the sun

Answer:

dude the ans no corona,

Explanation:

It cannot survive in space let alone be one of the layer of the sun due to its high temperature ( that is 2million fahrenheit )

Answer:

4.08m

Explanation:

h = PE/mg

h = 600/(15)(9.8)

h = 600/147

h = 4.08m

Answer:

It means that the frequency will be a lot higher with a shorter wave.

Answer:

310 miles

Explanation:

If an airplane can travel 620 miles in one hour, then to find how far it traveled in half of an hour, divide 620 by 2 (or multiply by 1/2).

620/2= 310 miles in 1/2 of an hour

The atomic mass is the protons + the neutrons.

So your answer would be 5 + 6 = 11.

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If the distance between the two particles is increased to 8.44 mm, the electrical potential energy will increase because work must be done to separate two particles that attract one another. Hence option(A) is correct.

Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors.

The gravitational potential energy of an object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are all examples of common types of potential energy. The joule, denoted by the symbol J, is the unit of energy in the International System of Units (SI).

The positive and negative charges attract each other, so work must be done to separate two particles. Hence, the electrical potential energy will increase.

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Answer: A

Explanation:

Just speed I think.

Speed is scalar, while velocity is a vector so you would need a direction. For acceleration you would need to know the specific speed at different points in time.

A cheetah can run 140 miles in 2 hours.

The information we can calculate about the cheetah given this information is the "speed" (A).

Answer:

Your answers are Continental crust and Mountain range.

Explanation:

Continental crust is the first blank, and Mountain range the second.

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Answer:

A scientific model is a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes. Scientists seek to identify and understand patterns in our world by drawing on their scientific knowledge to offer explanations that enable the patterns to be predicted.

Answer:

D

Explanation: