Samanthawalks along a horizontal path in the direction shown the curved path is a semi circle with a radius of 2 m while the horizontal part is for me what is the magnitude of displacement

Answer:

0.4 m/s^2 or 5184 km/h^2

Explanation:

To find the acceleration, given the inicial and final speed of the car, we can use the Torricelli's formula:

V^2 = Vo^2 + 2*a*D

Where V is the final speed, Vo is the inicial speed, a is the acceleration and D is the distance travelled. So, with V = 72 km/h, Vo = 0 (starts from rest) and D = 0.5 km, we have:

72^2 = 0 ^2 + 2*a*0.5

a = 72^2 = 5184 km/h^2

For an acceleration in m/s^2, we should use the speed in meters per second (72 / 3.6 = 20 m/s) and the distance in meters (D = 500):

20^2 = 0^2 + 2*a*500

400 = 1000a

a = 0.4 m/s^2

Answer:

The coefficient of the blank is 2

Explanation:

The balanced equation is Mg + 2HCl -> MgCl2 + H2 .

Answer:

Mg + 2HCl  → MgCl2 + H2

Explanation:

Answer:

The answer is the atom with 3 protons, 4 neutrons, and 3 electrons.

Explanation:

The reason why, is because protons are positive, neutrons are neutral, and electrons are negative. The protons cancel out the electrons, and the neutrons are just there.

Answer:

While there is no such thing as 100 percent safe, having nuclear energy is much safer than you think. It's thousands of times safer than conventional coal and other fossil-fuel-derived energy, not to mention the specter of environmental disaster from continued use of carbon-based energy sources.29 may. 2011

Explanation:

I hope it helps you

When using the lens equation, a negative value as the solution for d baseline i indicates that the image is Virtual. The correct option is B.

When a light strikes on a shiny surface, it reflects back the light ray in the same medium. The phenomenon is called reflection and the ray is called the reflected ray.

From the Len's maker formula, e have

1/f = 1/u + 1/v

where f = radius of curvature /2

So, the negative value as the solution for d baseline i indicates that the image is Virtual.

Thus, the correct option is B.

Learn more about reflection.

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Answer:

I want to say Liters but not 100% sure

Answer:

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Explanation:

Hope you get it right!

Answer:

2m/s

Explanation:

speed = distance÷time

speed =90÷45=2m/s

Answer:

a. normal

Explanation:

In the field of physics the normal is a line drawn at a right angle to a barrier. In other words the normal line is the line that is drawn perpendicular (right angle, 90 degrees) to the reflective surface of a mirror, or the particular boundary in which refraction occurs at the point of incidence of a light ray. This can be seen in the picture attached below.

Answer:

work = 1275.3 J

Explanation:

work = (force)(distance)cosø ------- force = ma

=(mass*acceleration)(distance)cosø

=(20*9.81)(6.5)cos0

=1275.3J

nite that the angle of cosine is the difference between the angle of force and the distance. in this case, the force and the distance are in the same direction. :)

Answer:because developed cities are more equipped to deal with raw sewage than less developed cities

Explanation:

Answer:

Please see the answers in the picture attached below.

Explanation:

Hope this answer can help you. Have a nice day!

Answer:

Assuming that the first person pulls with 0° direction, the second person pulls with 90° direction and the third person pulls with 180° direction, the net force would be

[tex]F=(60-75)i+70j\\F=-15i+70j[/tex]

It's module is

[tex]|F|=\sqrt{(-15)^{2} +(70)^{2} } =\sqrt{225+4900} \approx 71.6 \ KgF[/tex]

Therefore, the net force is 71.6 Kgf

Now, in the second problem, if the forces are parallel and have the same direction and sense, that means those forces complement each other, that means if the major one is 250 Newtons, then the second one is 200 Newtons, because the net force is 250 N.

Therefore, the missing force is 200 N.

Explanation:

Convert mi/h to ft/s.

60.0 mi/h × (5280 ft/mi) × (1 h / 3600 s) = 88.0 ft/s

Find the acceleration.

a = Δv / Δt

a = (0 ft/s − 88.0 ft/s) / 6.0 s

a = -14.7 ft/s²

The driver must accelerate the car at the average rate of

- 10 mile / hour-second

for 6 seconds .

The first and second velocities of the car, with four washers attached to the pulley, are both 0.125 m/s.

We must apply the following calculations to determine the car's first and second velocities with the four washers attached to the pulley:

v1 = 0.25 m / t1

v2 = 0.25 m / (t2 - t1)

Here, t1 denotes the typical time needed for the car to go 0.25 metres, and t2 is the typical time needed to travel 0.50 metres.Let's say that t1 and t2 are the typical times, each lasting two seconds on average.The first formula allows us to determine v1:

v1 = 0.25 m / 2 s = 0.125 m/s

Using the second formula, we can calculate v2:

v2 = 0.25 m / (4 s - 2 s) = 0.125 m/s

Table E can be used to record these values as the velocities at the relevant distances.

for such more questions on velocities

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Answer:

The answer is E

Explanation:

Wolves died off from the rona virus back in the 1930s so when they came back they brought C- 19 with them

Answer:

4N to the left. No it is not balanced.

Explanation:

8 -4 = 4 N of force

Balanced would be if they equaled zero, so 8 to the left and 8 to the right

Answer:

c

Explanation:

not sure i think heating beach

Answer:4 miles

Explanation:

Global Wind Patterns wind belts of the general circulation. The global wind pattern is also known as the "general circulation" and the surface winds of each hemisphere are divided into three wind belts: Polar Easterlies: From 60-90 degrees latitude. Prevailing Westerlies: From 30-60 degrees latitude (aka Westerlies).

Answer:

C

Its C on edge

Answer:

b

Explanation:

Answer:

b

Explanation:

trust

Answer:  5 years

Explanation:

Expression for rate law for first order kinetics is given by:

[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant  = x

a - x = amount left after decay process  = [tex]\frac{x}{16}[/tex]

a) for calculating k

[tex]20=\frac{2.303}{k}\log\frac{x}{\frac{x}{16}}[/tex]

[tex]k=\frac{2.303}{20}\log{16}[/tex]

[tex]k=0.138years^{-1}[/tex]

b) for calculating half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

[tex]t_{\frac{1}{2}}=\frac{0.693}{0.138years^{-1}}[/tex]

[tex]t_{\frac{1}{2}}=5years[/tex]

Thus its half life is 5 years

Answer:

O.383πrad

Explanation:

Please look below the document for the attached file

The calculation is been done in the attached file

Answer:

75ohms

Explanation:

V= IR

V = 1.5volts

I = 0.02A

1.5 = 0.02×R

Making R the subject

R = 1.5/0.02

R = 75ohms

The resistance in the circuit will be 75ohms

Answer:

4 m/s south

Explanation:

This is a pretty easy one.

Assume that the car has a reference point ragged x

We also know that the car starts moving at a point 10 m North of X. It moves steadily at a uniform velocity and ended at a position 10 m south of X.

If x is the reference point, we can infer that the car moves a total distance of, 10 m + 10 m.

Thus, the total distance moved by the car is 20 m.

It is also stated that it achieves that distance in 5 seconds.

Velocity is defined as the ratio of distance with respect to the tome taken, i.e V = d/t

Then, the velocity is

V = 20 / 5 = 4 m/s

Considering the fact that the car left and moved towards the south. We can say that it moved 4 m/s South.

Answer:

natural magnet is a material where the magnetic domains are aligned in a specific direction

An artificial magnet is a material that is placed in a strong external magnetic field, which causes the magnetic pick-ups of the spins to line up, thus creating a magnetic field in the direction of the external field,

Explanation:

A natural magnet is a material where the magnetic domains are aligned in a specific direction therefore creating a magnetic field in that direction.

An artificial magnet is a material that is placed in a strong external magnetic field, which causes the magnetic pick-ups of the spins to line up, thus creating a magnetic field in the direction of the external field, when the external field turns off the Material slowly returns to the random (paramagnetic) state in a given time as it detaches from the interaction of the material's spins.

A permanent magnet is a magnet where the spies are aligned in the molecules and therefore the Ferromagnetic state is maintained over time.

In a temporary magnet the state of lowest energy is paramagnetic and therefore the spins go into this disordered state to decrease the internal energy and the magnet disappears at the source of the relaxation time of the spins.

Answer:

- Beryllium has 4 protons and 5 neutrons in its nucleus.

- The nucleus of the periodic table isotope of Uranium has 92 protons and 146 neutrons.

The nucleus of the periodic table isotope of Thorium has 90 protons and 142 neutrons.

- Check Explanation

- Check Explanation

In Romanian/In limba romana

- Berilul are 4 protoni și 5 neutroni în nucleul său.

- Nucleul izotopului tabelului periodic al Uraniului are 92 de protoni și 146 de neutroni.

Nucleul izotopului tabelului periodic al Toriului are 90 de protoni și 142 de neutroni.

- Verificați Explicația

- Verificați Explicația

Explanation:

English Translation

- Determine the number of protons and neutrons in the nucleus of the atom of beryllium.

- Determine the structure of the nuclei of the isotopes of uranium and thorium

- Which forces are called nuclear forces.

- List the peculiarities of nuclear forces.

Solution

Note that the number of protons in the nucleus of an atom is the atomic number of that atom.

And the mass number of the atom is the sum of protons and neutrons in the nucleus of the atom.

The nucleus of an atom is the most massive part of an atom containing almost exclusively the neutrons and the protons of the atom.

- Beryllium has an atomic number of 4 and a mass number of 9.

Hence, its number of protons = atomic number = 4

(Number of protons) + (Number of neutrons) = mass number

Number of neutrons

= (mass number) - (Number of protons)

= 9 - 4 = 5

- Uranium has atomic number of 92 and mass number of 238.

Number of protons = 92

Number of neutrons = 238 - 92 = 146

Thorium has atomic number of 90 and a mass number of 232.

Number of protons = 90

Number of neutrons = 232 - 90 = 142 neutrons.

- Nuclear forces are the forces that keep the neutrons and protons of an atom bonded to the nucleus of an atom. The constituents of the atom's nucleus are called nucleons. Nuclear forces are the forces between two or more nucleons.

- The nuclear forces are about 10 million times stronger than the forces that bind atoms together in molecules and compounds.

Hence, massive energies are required to break into the nucleus of atoms.

This is why nuclear reactors produce about a million times more energy per kilogram fuel compared to chemical fuel.

However, the range of the nuclear force is short, only about 10⁻¹⁵ m, beyond which it decreases rapidly.

This is why, in spite of its enormous strength, we do not feel anything of this force on the atomic scale or in everyday life.

In Romanian/In limba romana

Rețineți că numărul protonilor din nucleul unui atom este numărul atomic al acelui atom. Și numărul de masă al atomului este suma protonilor și neutronilor din nucleul atomului. Nucleul unui atom este partea cea mai masivă a unui atom care conține aproape exclusiv neutroni și protonii atomului.

- Beriliu are un număr atomic de 4 și un număr de masă de 9.

Prin urmare, numărul său de protoni = numărul atomic = 4

(Număr de protoni) + (Număr de neutroni) = număr de masă

Numărul de neutroni = (număr de masă) - (Număr de protoni) = 9 - 4 = 5

- Uraniul are numărul atomic de 92 și numărul de masă de 238.

Numărul de protoni = 92

Numărul de neutroni = 238 - 92 = 146

Toriul are un număr atomic de 90 și un număr de masă de 232.

Numărul de protoni = 90

Numărul de neutroni = 232 - 90 = 142 neutroni.

- Forțele nucleare sunt forțele care mențin neutronii și protonii unui atom legați de nucleul unui atom.

Constituenții nucleului atomului se numesc nucleoni. Forțele nucleare sunt forțele dintre doi sau mai mulți nucleoni.

- Forțele nucleare sunt de aproximativ 10 milioane de ori mai puternice decât forțele care leagă atomii împreună în molecule și compuși.

Prin urmare, energiile masive sunt necesare pentru a pătrunde în nucleul atomilor.

Acesta este motivul pentru care reactoarele nucleare produc aproximativ un milion de ori mai multă energie pe kilogram de combustibil în comparație cu combustibilul chimic.

Cu toate acestea, domeniul forței nucleare este scurt, doar aproximativ 10⁻¹⁵ m, dincolo de care scade rapid.

Acesta este motivul pentru care, în ciuda puterii sale enorme, nu simțim nimic din această forță pe scara atomică sau în viața de zi cu zi.

Hope this Helps!!!

Sper că acest lucru vă ajută!!!