Water leaves a hose at a rate of 1.5 kg/s with a speed of 20 m/s and is
aimed at the side of a car, which stops it (ignore any splashing). What is
the force exerted by the water on the car?

Answer:

Rutherford considered these observations and he concluded: The fact that most alpha particles went straight through the foil is evidence for the atom being mostly empty space. A small number of alpha particles being deflected at large angles suggested that there is a concentration of positive charge in the atom.

Hope it helps

Most alpha particles passed straight through, but a few were repelled so strongly that they were bounced back or deflected at large angles. This led Rutherford to conclude that the charge of the nucleus of an atom must be positive.

There are some models that are used to explain the arrangements of subatomic particles inside the atom based on the atomic theory of atoms known as the atomic models.

As given in the problem statement Think of Rutherford's experiment. Most alpha particles passed straight through, but a few were repelled so strongly that they were bounced back or deflected at large angles.

Most alpha particles were resisted so strongly that they were bounced back or deflected at huge angles, but a handful did not.

Hence, Rutherford came to the conclusion that an atom's nucleus must have a positive charge as a result of this.

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Answer:

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Explanation:

Answer:

q r s t u v w x y z

Explanation:

Answer:

2.00 (right on acellus)

Explanation:

doubling the distance between two charges makes F (8.00) quarter, so you would just do 8.00*1/4.

Answer:

7 volts

Explanation:

Applying,

E = IR+Ir................ Equation 1

Where E = electromotive force of the cell, I = current. R = External resistance, r = internal resistance.

From the question,

Given: I = 2 amperes, R = 3 ohm, r = 0.5 ohm

Substitute these values into equation 1

E = (2×3)+(2×0.5)

E = 6+1

E = 7 volts

Answer:

A similarity is that they all pick up radio signals all the time!

Explanation:

Hope this helps!

Answer:

8 million animals

Explanation:

This is because all over the world, animals are consumed as food and they serve as source of protein.

Animals are used to make different delicacies depending on the choice of the consumer and it is the major source of protein. Every hour, about 8 millions are killed and are sold to consumers and other parts of it can be use for other things. Examples of animals consumed are goat, sheep, cow, chicken e t.c.

Answer:

v = 12.8 m/s

Explanation:

Applying the law of conservation of energy:

[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2[/tex]

where,

m₁ = mass of baseball = 149 kg

m₂ = mass of catcher = 57 kg

u₁ = initial speed of ball = 17.7 m/s

u₂ = initial speed of catcher = 0 m/s

v₁ = v₂ = v = final speed of ball and the final speed of catcher = ?

both are same because ball is in hands of cathcer in the final state.

Therefore,

[tex](149\ kg)(17.7\ m/s)+(57\ kg)(0\ m/s)=(149\ kg)(v)+(57\ kg)(v)\\\\v = \frac{2637.3\ kgm/s}{206\ kg}[/tex]

v = 12.8 m/s

Answer:

b. compensate for changes in the Earth's atmosphere and achieve better resolution.

Explanation:

Answer:

Explanation:

I cant really see the equation

Answer:

A. 1 unit

B. 5 units

C. 8 units

Explanation:

Count the lines from each starting point to each destination.

Answer:

[tex]T=9.42Nm[/tex]

Explanation:

From the question we are told that:

Radius [tex]r= 0.5 m[/tex]

Current [tex]I= 3.0 A[/tex]

Normal vector [tex]n=\frac{(2i - j +2k)}{3}[/tex]

Magnetic field [tex]B= (2i-6j) T[/tex]

Generally the equation for Area is mathematically given by

 [tex]A=\pi r^2[/tex]

 [tex]A=3.1415 *0.5^2[/tex]

 [tex]A=0.7853 m^2[/tex]

Generally the equation for Torque is mathematically given by

 [tex]T=A(i'*B)[/tex]

Where

 [tex]i'*B= \begin{bmatrix}2&-1&2\\2&-6&0\end{bmatrix}[/tex]

 [tex]X\ component\ of\ i'*B= [(-1 * 0)-(2*-6)][/tex]

 [tex]X\ component\ of\ i'*B=12[/tex]

Therefore

 [tex]T=0.7853*12[/tex]

 [tex]T=9.42Nm[/tex]

Answer:

20 meters.

Explanation:

In the graph, the x-axis (the horizontal axis) represents the time, while the y-axis (the vertical axis) represents the distance.

If we want to find the distance covered in the first T seconds, you need to find the value T in the horizontal axis.

Once you find it, we draw a vertical line, in the point where this vertical line touches the graph, we now draw a horizontal line. This horizontal line will intersect the y-axis in a given value. That value is the total distance travelled by the time T.

In this case, we want to find the total distance that David ran in the first 4 seconds.

Then we need to find the value 4 seconds in the horizontal axis. Now we perform the above steps, and we will find that the correspondent y-value is 20.

This means that in the first 4 seconds, David ran a distance of 20 meters.

Answer: unit n/c

Explanation: This should be the answer because I just asked my Physics Teachers I hope this is correct

Hope This Helps :)

The electric field between the plates will be 0.1667×10⁵ C.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

The electric field formula is as follows:

E = F /Q

Where,

The electric field is denoted by the letter E.

F is Electric force

The charge is Q.

Given data;

Q (Charge)= 8.38 × 10¯¹¹ C ,

A (Area between the plates) = 5.68 × 10¯⁴ m²,

ε₀(permeability constant) = 8.85 × 10¯¹² C²/Nm²

[tex]\rm E= \frac{Q}{K \epsilon_0 } \\\\ \rm E= \frac{8.38 \times 10^{-11}}{5.68 \times 10^{-4} \times 8.85 \times 10^{-12} } \\\\ E= 0.1667 \times 10^5 \ N C^{-1}[/tex]

Hence,the electric field between the plates will be 0.1667×10⁵ C.

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First aid suggestions include:

Hold your face under running water for 15 to 20 minutes and allow the water stream to flood into your eyes. Use your fingers to hold your eyelids apart (make sure there is no trace of the chemical on your fingers).

If you wear contact lenses, remove them as soon as possible.

Seek immediate medical advice. Medical staff will need to know what chemical was involved, particularly whether it was acid or alkaline, liquid or powder.

Do not judge the seriousness of your eye injury on the degree of pain. For example, alkali chemicals don’t usually cause significant symptoms, but can seriously damage the eye.

Powder or particulate (granular matter, like wet concrete) chemicals can be particularly damaging since they are more difficult to flush out.

Answer:

immediately wash eyes with water

Answer:A 2.2kg block of ice slides across a rough floor. Its initial velocity is 2.5m/s and its final velocity is 0.50m/s. How much of the ice block melted as a result of the work done by friction? (Latent Heat of water is 3.3*10^5J/kg)

Explanation:

The heat produced by friction between a skate and the ice during movement over the surface melts the topmost layer of ice. However, even when you are still, ice is still slick. When you remain still on ice, there is no friction to produce heat, but the ice is still slippery.

Although friction does generate heat, the amount of heat it produces is insufficient to melt ice that is at a very low temperature. But even at low temperatures, ice still creates a slick liquid layer. The formation of a slippery coating even when the item is totally still cannot be explained by frictional heating.

Therefore, A rough floor is traversed by a 2.2 kg lump of ice. It moves at a final speed of 0.50 m/s after starting out at 2.5 m/s. What portion of the ice block melted as a result of the friction's work? (Water has a latent heat of 3.3×105 J/kg.)

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Answer: Earth is in a continuous motion in space, spinning as it moves around the sun.

(Hope this helped!)

Answer:

motion in space and moves around the sun

Explanation:

I hope this helps

Answer:

26v

....................

Explanation:

Given that,

The frequency of microwaves, [tex]f=9\times 10^9\ Hz[/tex]

The time period of the wave is :

[tex]t=\dfrac{1}{f}\\\\t=\dfrac{1}{9\times 10^9}\\\\t=1.1\times 10^{-10}\ s[/tex]

Let [tex]\lambda[/tex] is the wavelength of the wave. We know that,

[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}[/tex]

Put all the values,

[tex]\lambda=\dfrac{3\times 10^8}{9\times 10^{9}}\\\\\lambda=0.03\ m[/tex]

Hence, this is the required solution.

Answer:

156,800 N

Explanation:

Given: Width = 2.0 m Length = 4.0 m Depth =  2.00 cm. Density of water = 1000 Kg/m³

To find: What is the weight of the truck?

Formula: [tex]F = m[/tex] × [tex]9.8 m/s^2[/tex]

Solution: Weight is a measure of the force of gravity pulling down on an object. It depends on the object's mass and the acceleration due to gravity, which is 9.8 m/s² on Earth. F is the object's weight in Newtons (N) and m is the object's mass in kilograms.

Firstly, multiply the length, width, and depth.

[tex]2.0[/tex] × [tex]4.0[/tex] × [tex]2.00[/tex] [tex]= 16[/tex]

Next, the weight of the truck is found by multiplying the density of water, the result found by multiplying the length, width, and depth, and the formula;

[tex]1000 kg/m^3[/tex] × [tex]16[/tex] × [tex]9.8m/s^2[/tex][tex]= 156,800[/tex]

Therefore, the weight of the truck is 156,800 N

Electrons moving between objects should be place in the region marked X. So, option A.

When a substance is exposed to an electric or magnetic field, it has a characteristic known as charge that makes it experience a force. Neither a positive nor a negative charge exists.

Here,

Normally, electrons are organized into specific shells that maintain a constant distance from the atom's nucleus.

Two electrons can fit inside of the shell that is closest to the nucleus. Up to eight can fit inside the following shell. The number of electron shells in some atoms with numerous protons can reach seven.

A powerful force of attraction exists between the protons and the electrons in the shells that are closest to the nucleus.

In the outermost shells of certain atoms, the protons are sometimes attracted to the electrons with little force.

One can force these electrons out of their orbits. They may switch from one atom to another by applying a force. Electricity is produced by the changing electrons.

Hence,

Electrons moving between objects should be place in the region marked X. So, option A.

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Answer:

The Magnitude of the angle of reflection equals that of Incidence from the Law of reflection

So its 50°.

Explanation:

[tex]\huge{ \mathfrak{ \underline{Áñswér: }}}[/tex]

A change in state is considered a :

[tex] \hookrightarrow { \mathbb{\: physical \: change}}[/tex]

[tex]\#TeeNForeveR [/tex]

Answer:

True

Explanation:

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

Hope this helps!!

Answer:

Atoms are composed of electrons (charge -1), protons (charge +1), and neutrons (no charge). So in a neutral atom the correct answer is "D".

If an external force and the frictional force are acting on a body, which is in rest on the floor and are equal and opposite, then the frictional force is Static friction.

Answer:

Only circuit A will contain to lit bulbs