A runner with a mass of 78.6 kg, moving at a speed of 8.8 m/s, rounds a bend with a radius of 25 m. What is the centripetal force needed to keep this runner on the curve and what supplies this force?

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 1500 × 10

We have the final answer as

Hope this helps you

Answer:

15000 N

Explanation:

Answer:20Ω

Explanation:

Answer:

scientists will use absolute dating to find how old a fossil exactly is.

Answer:

So the answer is scientists will use absolute dating to actually find how old a fossil exactly is. Hope it helps!

Answer:

Neatly wrap the wire around the nail

Explanation:

hope this helps ( not sure tho )

Before connecting the wires used to make an electromagnet, several steps are necessary. The steps are removing insulation from wire ends and cleaning and connecting the prepared wire ends.

First, the insulation surrounding the wire ends must be removed using a blade. Next, the exposed ends should be cleaned with a wire brush or sandpaper to eliminate any dirt or oxidation. Depending on the requirements, the wires can be twisted together for a temporary connection or soldered for a more secure joint. Lastly, the prepared wire ends are connected as needed to complete the circuit.

Therefore, these steps ensure that the wires are properly prepared, allowing for effective current flow and the formation of a functional electromagnet.

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Answer:

The cannon has an initial speed of 13.25 m/s.

Explanation:

The launched cannonball is an example of a projectile. Thus, its launch speed can be determined by the application of the formula;

R = u[tex]\sqrt{\frac{2H}{g} }[/tex]

Where: R is the range of the projectile, u is its initial speed, H is the height of the cliff and g is the gravitaty.

R = 26.3 m, H = 19.3 m, g = 9.8 m/[tex]s^{2}[/tex].

So that:

26.3 = u[tex]\sqrt{\frac{2*19.3}{9.8} }[/tex]

[tex](26.3)^{2}[/tex] = [tex]u^{2}[/tex] x [tex]\frac{38.6}{9.8}[/tex]

691.69 =  [tex]u^{2}[/tex] x [tex]\frac{38.6}{9.8}[/tex]

[tex]u^{2}[/tex] = [tex]\frac{691.69*9.8}{38.6}[/tex]

   = [tex]\frac{6778.562}{38.6}[/tex]

[tex]u^{2}[/tex] = 175.6104

⇒ u = [tex]\sqrt{175.6104}[/tex]

  = 13.2518

u = 13.25 m/s

The initial speed of the cannon is 13.25 m/s.

Answer:

The correct options are A and B

Explanation:

Personal beliefs can be described as beliefs that have not been scientifically proven. These beliefs are generally as a result of religion, culture or tradition. Scientifically in theory, these beliefs lack clear path of possibility. For example, being in possession of certain mineral crystals in order to help protect the body against illness have a little possibility of being scientifically (in theory) explained. There is also no scientific evidence to support this claim.

There is also no scientific evidence to support the idea of the constellation's position to predict  events in a person's life. This also has little possibility of being theoretically explained in science.

It should however be noted that there are exceptions/coincidences that suggest these events happen as it has been listed in the two options.

Answer: A and B!

Explanation: Just took the quiz.

Answer: Nitrogen

Explanation: Nitrogen makes up 78% of the atmosphere, Oxygen makes up 21%, and Argon 0.9%.

Water vaper makes up between 1-4%, depending on the region.

Carbon Dioxide makes up only about 0.04%.

Answer: The answer is: Nitrogen

Explanation: I have my ways ;>

Answer:

B

Explanation:

a vector quantity has direction and magnitude

Answer:

Though the process photosynthesis

Explanation:

One of the important ways by which the atmosphere recycle gases through interactions with the the biosphere is by photosynthesis.

The biosphere is the living component on the earth. The atmosphere is the gaseous envelope round the earth.

This way, there is a sustained interaction between the atmosphere and biosphere.

Answer:

B. Through the process photosynthesis

Explanation:

:)

Answer:

Sir Isaac Newton was an English mathematician, physicist, astronomer, theologian, and author

Explanation:

but he is most importantly known for having formulated the theory of universal gravity

and for having invented the calculus in the mid to late 1660s

Answer:

1) 560 cm

2) 355cm, 3.55 m

3) .6 liters

4) 0.07 ka

5) 502mm

6) 600,000

Answer:

4700 because of 20 degree

(a) The unbalanced force will be "0.2 N".

(b) The mass of book "1.818 kg".

Given:

(a) Total unbalanced force,

→ [tex]F_{net} = 2.8-2.6[/tex]

          [tex]= 0.2 \ N[/tex]

(b) By applying Newton's second law,

→ [tex]F = ma[/tex]

or,

→ [tex]m = \frac{F_{net}}{a}[/tex]

By substituting the values,

      [tex]= \frac{0.2}{0.11}[/tex]

      [tex]= 1.818 \ kg[/tex]

Thus the above approach is correct.  

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Answer:

D

Explanation:

Answer:

D

Explanation:

:p

Answer: B - complimenting others on good plays

Explanation: Reading the first words sort of give it away when staying positive you compliment, not criticize, confront angrily, or refuse.

Answer:

B

Explanation:

Edge 2021

Answer: The electrician wrapped the wires with plastic caps because plastic is an insulator.

Explanation: Metals are excellent conductors of electricity, largely because electrons in the metal are only loosely bound by their respective atoms and thus will readily flow under the influence of an external electric field. Plastics are very different. All the electrons in plastics are tightly bound by their respective molecules and it would take a lot of energy to remove them. Consequently, most plastics are insulators that do not conduct electric current (or do so only poorly).

Answer:

3.605551275463989

Explanation:

solve using Pythagorean theorem

"at symbol"

The at sign, "at symbol", is normally read aloud as "at"; it is also commonly called the at symbol or commercial at. It is used as an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets "at symbol" £2 per widget = £14), but it is now seen more widely in email addresses and social media platform handles.

Answer:

A.

Explanation:

I remember this one from my science class.

The molecules in the wood are vibrating faster .

During heating, the temperature of any object or substance increases. This cause the particles to move faster as they gain kinetic energy which leads to an increase in the collision rate as well as diffusion.

Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.

The International System of Units (SI) defines the calorie (cal) as the standard unit of heat. The cal measures the amount of energy transfer needed to raise the temperature of one gram of pure liquid water by one degree Celsius, provided that the water is above the freezing point and below the boiling point.

Therefore, The molecules in the wood are vibrating faster .

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Answer:

Amount of mold

Explanation:

the dependent variable depends on the independent variable. the amount of mold changes if the bread is opened or not. the independent variable is what can change.

Answer:

When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.

Explanation:

this is what we studied

so basically  there is like a surface

and 2 different waves coming out of the same source

they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)

results in showing these colors

Answer:Circuit B is the answer

Explanation:

The  diagram B represents a closed circuit with the least resistance. Hence, option (C) is correct.

Electric current travels along a circuit to be transmitted. A battery or generator, a device that provides energy to the charged particles that make up the current, a device that uses current, such as a lamp, an electric motor, or a computer, and the connecting wires or transmission lines make up an electric circuit.

Ohm's law and Kirchhoff's rules are two fundamental laws that quantitatively define how electric circuits function.

In diagram A, there has two external resistance.

In diagram B,  there has no external resistance.

In diagram C,  there has two external resistance.

In diagram D,  there has three external resistance.

Hence, the  diagram B represents a closed circuit with the least resistance.

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Answer:

geology - a branch of earth science that focuses on the study of the rock

biology - study of life

molecular clock - a technique for estimating the age of species by comparing molecular differences between species

sediment - dirt, pieces of rock, and the remains of living things at the bottom of oceans, seas, and lakes

chemistry terms - a branch of physical science that focuses on composition, structure, properties and change of matter

Explanation:

Pretty sure that's all correct. Hope this helps

Answer:

1.5s

Explanation:

Given parameters:

Time taken for the echo to be heard  = 3s

Unknown:

Time taken for signal to reach the ship = ?

Solution:

An echo is phenomenon that originates from wave reflection.

If the travel time of the echo is 3s, the time it takes the echo to reach the ship is half of this time.

 So,

   Time taken to reach the sunken ship = [tex]\frac{3}{2}[/tex]   = 1.5s

The boat is initially at equilibrium since it seems to start off at a constant speed of 5.5 m/s. If the wind applies a force of 950 N, then it is applying an acceleration a of

950 N = (2300 kg) a

a = (950 N) / (2300 kg)

a ≈ 0.413 m/s²

Take east to be positive and west to be negative, so that the boat has an initial velocity of -5.5 m/s. Then after 11.5 s, the boat will attain a velocity of

v = -5.5 m/s + a (11.5 s)

v = -0.75 m/s

which means the wind slows the boat down to a velocity of 0.75 m/s westward.

Answer:

[tex]q_2=2.47\times 10^{-4}\ C[/tex]

Explanation:

The charge on one object, [tex]q_1=9.9\times 10^{-5}\ C[/tex]

The distance between the charges, r = 0.22 m

The force between the charges, F = 4,550 N

Let q₂ is the charge on the other sphere. The electrostatic force between two charges is given by the formula as follows :

[tex]F=\dfrac{kq_1q_2}{r^2}\\\\q_2=\dfrac{Fr^2}{kq_1}\\\\q_2=\dfrac{4550\times (0.22) ^2}{9\times 10^9\times 9.9\times 10^{-5}}\\\\q_2=2.47\times 10^{-4}\ C[/tex]

So, the charge on the other sphere is [tex]2.47\times 10^{-4}\ C[/tex].

Answer:

its a opinonated question

Explanation:

XD

Answer:

B

Explanation:

Answer:

D. The speed of the combined vehicles is less than the initial speed of the truck.

Explanation:

Ik this is late

Answer: D. The speed of the combined vehicles is less than the initial speed of the truck.

Explanation: