URGENT
Find the total
equivalent
resistance for the
circuit.

Answer:

54 km/hr

Explanation:

m/s to km/hr => 18/5

15 m/s to km/hr => 15 x 18/5 =>3 x 18 => 54km/hr

Answer:

99

Explanation:

Answer:

please mark me brainliest

Explanation:

No, sound waves cannot travel in a vacuum. This is because sound waves are mechanical waves that need a medium (such as air and water) to travel. Sound in physics is defined as a vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid.

Answer:

The net force is the combined effect (the sum) of the real forces acting on the object. ... When there is a net force on an object, it causes the object to accelerate in the direction of the net force; this is not the same as the direction of the motion unless the object is going in a straight line.

Answer:

72km/hr

= 72× 1000m/1×60×60 sec

= 72000m/ 3600sec

=20m/s

0.5 m

= 0.5×60 sec

= 30 sec

Now,

acceleration = v-u/t

= 40m/s-20m/s divided by 30 sec

= 20m/s divided by 30 sec

= 0.6m/s2

Explanation:

hope this helps you

Answer: 0.9264 kg

Explanation: [I'll use "cc" for cubic centimeter, instead of cm^3.

The volume is 6cm*4cm*2cm = 48 cm^3 (cc).

Density of Au is 19.3 g/cc

Mass of gold = (48 cc)*(9.3 g/cc) = 926.4 grams Au

1 kg = 1,000 g

(926.4 grams Au)*(1 kg/1,000 g) = 0.9264 kg, 0.93 kg to 2 sig figs

At gold's current price of $57,500/kg, this bar is worth $53,268. Keep it hidden from your lab partner (and instructor).

Answer:

Velocity is quickness of motion or action. A synonym is celerity; a simpler word is speed. In physics, velocity specifically refers to the measurement of the rate and direction of change in position of an object.pls pls mark me branilest

Answer:

Velocity is defined as displacement travelled per unit time in a fixed direction. It is a vector quantity as it has both magnitude and fixed direction.

Please mark me brainliest.

Answer:

1.02m

Explanation:

Apply Principle of conversation of energy,

mgh = 1/2 Ke²

Answer:

mass is the quantity of matter inside the body

Answer:

The mass of a body is the quality of matter it contains

Answer:

In physics a null is a point in a field where the field quantity is zero as the result of two or more opposing quantities completely cancelling each other

Answer:

9.722

Explanation:

35*1000÷1×60*60

35000÷3600

9.722

Answer:

0.0084×91=0.7644

Explanation:

hope this helps

please mark this answer as brainlist

Answer:

a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving.

Explanation:

Answer:

A net force that acts on an object to keep it moving along a circular path

External force and here centripetal force

Answer:

The girl exerts more pressure.

Explanation:

Pressure can be defined as the force exerted normally or perpendicularly per unit area.

i.e P = F/A

Girls

Area of the heel = 1cm² = 10^(-4) m²

Force = mg = 50 × 10 = 500N

Pressure =

[tex] \frac{500}{10 ^{ - 4} } [/tex]

[tex] = 5 \times {10}^{6}[/tex]

Elephant

Area = 250cm² = 2.5 x 10^(-2)b m²

Force = mg = 40000N

Pressure =

[tex] \frac{40000}{2.5 \times {10}^{ - 2} } [/tex]

[tex] = 1.6 \times {10}^{6} [/tex]

Originally, the periodic table was ordered by atomic weight, but there were some problems with this order for some particular cases.

In 1913 Moseley proposes to use the atomic number (number of protons of the atom) to order the elements in the periodic table. There are some motives to do this, each element has a different number of protons, and if you add one proton to the nucleus, you get the next element in the periodic table.

This also relates to the x-ray diffraction of the elements (as the number of protons increase, also do the numbers of electrons, thus the energy of the x-rays also increases). At the moment this was the best way to order the periodic table, but in recent years some problems were found, but at the moment, there does not exist a "better" periodic order.

Concluding, the correct option is "atomic number".

https://brainly.com/question/11155928

Answer:

1. Which statement about metals and nonmetals is correct?

*Metals can be hammered into thin sheets, and nonmetals are brittle.*

2. Based on properties of elements in the periodic table, which element is the best conductor of thermal energy?

*vanadium (V)*

3. Which element has four valence electrons?

*silicon (Si)*

4. Which statement best explains why hydrogen’s atomic number is equal to its mass?

*Hydrogen does not have any neutrons.*

5. Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?

*Francium has fewer valence electrons, but they are in a higher energy level.*

6. Gallium has an atomic number of 31 and a mass number of 70. Which table shows the number of protons, neutrons, and electrons in a gallium ion with a +3 charge?

*protons 31, neutrons 39, electrons 28*

7. Which is true about about stable isotopes?

*A stable nucleus has a similar number of protons and neutrons.*

8. On which atomic property proposed by Henry Moseley is the current periodic table of the elements based?

*atomic number*

9. Which incorrect aspect of Rutherford’s model was fixed by Bohr’s model?

*Electrons move freely in curved paths around the nucleus.*

10. You plan to pass alpha particles through a field that contains a consistent type of particle. Which configuration will result in the largest deflection of alpha particles?

*low-energy alpha particles passing through a field of high mass-number-particles*

11. Where on the periodic table do you find elements that have full valence electron shells?

*on the right side of the periodic table*

12. Which element would have a full outer shell of electrons if it gained three electrons?

*nitrogen*

13. Which group of elements has the most similar chemical properties?

*fluorine, chlorine, and iodine*

14. Group 2 elements have two valence electrons. Which kind of bond will they most likely form, and why?

*An ionic bond is likely because they will want to give away two valence electrons in order to become stable.*

15. An element has six valence electrons. Which ionic charge will its ion carry?

*2–*

16 and 17 are writing.

Explanation:

These are the correct answers for The Periodic Table Unit Test.

Answer:

Pascal's law states that the pressure exerted anywhere in a confined incompressible liquid is transmitted equally in all directions irrespective of the area on which it acts and it always acts at right angles to the surface of containing vessel.

have a great day sister

Answer:

Distance = 2m

Explanation:

Runner A : 1,75

Runner B : 0.71 ( divided speed over velocity for both & B)

Distance = 1,75 + 0,71 = 2,46 m

Is it right?

Answer:

hmmm i dont know....

Explanation:

i just wanted free point. TANKS YOU SIR!!

Answer:

In physical changes, no new materials are formed and the particles do not change apart from gaining or losing energy. ... Particles stay the same unless there is a chemical change whether the matter is solid, liquid or gas. Only their arrangement, energy and movement change.

Explanation:

Answer:

you will have to wear hiking shoes or sports shoes

Answer:

1.) distance is always positive while displacement can be negative as well.

2.) distance cannot be 0 but displacement can be 0.

3.) distance is a scalar quantity while displacement is vector quantity.

Explanation:

480km = 480000m

12hr = 43200 sec

480000/43200 = 11.1111111111

round up 2 sig fig

11m/s

answer is 11m/s

Answer: the answer is d $19.95

Explanation:

chicken dinner: 6.95 x 3 = 20.85

burger: 5.75

20.85 + 5.75 = 26.6

26.6 divided by 4 (bc theres 4 ppl and the bill needs to be split equally)

26.6/4= 6.65

and since 3 friends are paying him back u gotta do 6.65 x 3 = 19.95

Answer: Approximately 22 cm

=========================================================

Explanation:

The unstretched spring is 12.0 cm long. When adding a load of 5.0 N, it stretches to 15.0 cm. This is a displacement of 15.0 - 12.0 = 3.0 cm, which is the amount the spring is stretched.

Convert this displacement to meters (so that it fits with the meters unit buried in Newtons).

3.0 cm = (3.0)/100 = 0.03 m

Apply Hooke's Law to find the spring constant k

F = -kx

5.0 = -k*(0.03)

k = -(5.0)/(0.03)

k = -166.667 approximately

Now we must find the displacement x when F = 15 newtons

F = -kx

-kx = F

x = F/(-k)

x = -F/k

x = -15/(-166.667)

x = 0.089 approximately

x = 0.1

The displacement to one decimal place is about 0.1 meters, which converts to 100*0.1 = 10 cm

So the spring will be stretched to about 12cm+10cm = 22 cm

Answer:

If you want definition, here it is:

Dispersion is defined to be the spreading of white light into its full spectrum of wavelengths. Refraction is responsible for dispersion in rainbows and many other situations. The angle of refraction depends on the index of refraction, as we saw in The Law of Refraction.

Potassium Sulphate :-

[tex]\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\put(0,3){\bf K}\put(0,0){\bf 1}\put(4,3){\sf SO_4}\put(4,0){\bf -2}\put(0.2,2.9){\vector(4,-3){3.5}}\put(3.8,2.9){\vector(-4,-3){3.5}}\end{picture}[/tex]

[tex]\boxed{\sf K_2SO_4}[/tex]

Sodium chloride:-

[tex]\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\put(0,3){\bf Na}\put(0,0){\bf 1}\put(4,3){\sf Cl}\put(4,0){\bf -1}\put(0.2,2.9){\vector(4,-3){3.5}}\put(3.8,2.9){\vector(-4,-3){3.5}}\end{picture}[/tex]

[tex]\boxed{\sf NaCl}[/tex]

Ammonium Chloride

[tex]\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\put(0,3){\bf NH_4}\put(0,0){\bf 1}\put(4,3){\sf Cl}\put(4,0){\bf -1}\put(0.2,2.9){\vector(4,-3){3.5}}\put(3.8,2.9){\vector(-4,-3){3.5}}\end{picture}[/tex]

[tex]\boxed{\sf NH_4Cl}[/tex]

Silver Oxide

[tex]\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\put(0,3){\bf Ag}\put(0,0){\bf 1}\put(4,3){\sf O}\put(4,0){\bf -2}\put(0.2,2.9){\vector(4,-3){3.5}}\put(3.8,2.9){\vector(-4,-3){3.5}}\end{picture}[/tex]

[tex]\boxed{\sf Ag_2O}[/tex]