If an electron's speed is doubled from 0.2c to 0.4c, by what ratios are the momentum, total energy and kinetic energy changed? Repeat this for an electron whose speed is doubled from 0.4c to 0.8c. 3. At what speed does the kinetic energy of a particle equal its rest energy? 4. Find the momentum of an electron (in MeV/c ) whose speed is 0.75c. 5. Find the momentum of a proton whose kinetic energy equals its rest energy. 6. A particle of rest mass 5.00 g moves with speed u=0.70c relative to an observer. Compare its kinetic energy with the classical calculation. 7. The total energy of a proton is 4.50GeV. Find its momentum.

Initial velocity = zero (i.e., free fall)

Final velocity = 30m/s

Acceleration due to gravity = 10m/s²

For a body falling freely under the action of gravity, g is taken positive\(.\)

◈ First equation of kinenatics :

⇒ v = u + gt

⇒ 30 = 0 + 10t

⇒ t = 30/10

⇒ t = 3s

Hence, object will attain a speed of 30m/s after 3s.

It is best if you have trained with a qualified instructor, practiced proper techniques, and make sure that the coals have cooled down to a safe temperature before walking on them.

When you walk barefoot on red-hot wooden coals, it is best if:

You walk quickly and with purpose.

You distribute your weight evenly and avoid putting excessive pressure on any particular area of your foot.

You maintain a confident and steady pace to minimize the amount of time your feet spend in contact with the hot coals.

You keep your feet relaxed and avoid tensing up, as tension can increase discomfort and the risk of injury.

You ensure the coals are evenly spread and there are no sharp or dangerous objects hidden within them.

You have prepared your mind and body for the experience by receiving proper instruction and guidance from a trained professional who is familiar with fire walking techniques.

You stay focused on your goal and maintain a positive mindset.

It is important to note that firewalking can be a potentially dangerous activity, and proper precautions should be taken. It is always recommended to seek guidance from trained professionals and follow established safety protocols when attempting fire walking or any similar activities.

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The maximum power a giant electric eel can deliver to its prey is 5.00×10^2 V × 1.00 A = 5.00 × 10^2 W. the current through the swimmer in this case is not large enough to be dangerous.

If the snorkeler's body resistance is 615 Ω and the eel delivers a voltage of 5.00×10^2 V, then the current flowing through the snorkeler's body can be calculated using Ohm's Law: I = V/R. Hence, I = (5.00×10^2 V) / (615 Ω) ≈ 0.813 A.

The current of 0.813 A is less than 500 mA, the threshold for causing heart fibrillation and death. Therefore, the current through the swimmer in this case is not large enough to be dangerous.

The power received by the snorkeler can be calculated using the formula P = IV. Thus, P = (0.813 A) × (5.00×10^2 V) ≈ 4.07 × 10^2 W.

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Answer:

vi = 5.25 m/s

Explanation:

We can determine the initial velocity of the runner by using the first equation of motion, as follows:

\(v_f = v_i + at\\\)

where,

vf = final speed of the runner = 4 m/s

vi = initial speed of the runner = ?

a = deceleration of the runner = - 0.25 m/s²

t = time taken = 5 s

Therefore,

\(4\ m/s = v_i + (-0.25\ m/s^2)(5\ s)\\v_i = 4\ m/s + 1.25\ m/s\\\)

vi = 5.25 m/s

Answer:

1,000 miles

Explanation:

So, this can be set up as a basic division problem:

3000/3=1000

So the plane traveled at an average speed of 1,000 miles per hour

Answer:

1,000 miles

Explanation

3 divided by 1000 = 1000

The strength of the magnetic field required, applied perpendicular to the direction of the beam, that will deflect the beam of electrons into a circular arc with radius of 3.23 mm is 0.157 x 10^-3 T.

Explain the motion of electrons in a uniform magnetic field.

​Because magnetic force is always perpendicular to velocity, the charged particle is not affected by it. The kinetic energy and speed of the particle stay unchanged as a result. Motion's speed is unaffected, only its direction. Uniform circular motion frequently looks like this. The most straightforward scenario is when a charged particle moves perpendicular to a constant B-field. (If this happens in a vacuum, the magnetic field is what mostly controls the motion.) Here, the centripetal force is provided by the magnetic force (Lorentz force).

Cyclotron resonance is the word used to describe a particle moving in a circular pattern as a result of a constant magnetic field.

Equating the centripetal force and magnetic force we get,

r= mv/qB

we find

B= mv/er

where m is the mass of electrons

           e is the charge of electrons

B = (9.11×10 ^−31 kg)(89200 m/s)/ (1.60×10 ^−19  C)( 3.23 x 10^-3 m)

  = 157239.164 x 10^-9

  = 0.157 x 10^-3 T

Hence, the strength of the magnetic field required to deflect the beam of electrons is 0.157 x 10^-3 T

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Answer:

BLACKPINK IN YOUR AREA MATH IS SO MUCH FUN

Explanation:

PERIOD AHH

Answer:

V = f * λ           velocity equals frequency * wavelength

If f is increased then λ must decrease for the velocity to remain constant.

When preparing for the Physics ACT test, it is important to focus on the core concepts of physics such as kinematics, forces, energy, work, linear momentum, rotational motion, gravity and thermodynamics.

Kinematics is the branch of classical mechanics that studies the motion of objects without considering the forces that cause the motion. It is concerned only with the description of motion, and deals with the position, orientation, velocity, and acceleration of objects in motion.

Kinematics can be used to describe the motion of objects in a variety of ways, such as linear motion, angular motion, and dynamic motion. It is also used to calculate the trajectory of objects.

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The term that is formed from two pieces of different metals stuck together lengthwise is bimetallic coil.

What is a bimetallic coil-A bimetallic coil is an essential component of many temperature control devices. Bimetallic coils are also known as bimetallic strips, and they are made up of two different types of metal bonded together and wound into a coil shape.Bimetallic coils are used to create a temperature-sensitive sensor that can open and close a circuit as temperatures rise or fall. This capability allows bimetallic coils to be used in a variety of devices, including thermostats, heat pumps, and furnace limit switches.The structure of bimetallic coils : A bimetallic strip is made up of two separate metals that are bonded together. These metals have different coefficients of thermal expansion, which means that they expand and contract at different rates as the temperature changes.When the bimetallic coil is exposed to heat, the metal with the lower coefficient of thermal expansion will expand more than the metal with the higher coefficient of thermal expansion.

This causes the bimetallic strip to bend, which can be used to open or close a circuit.In summary, bimetallic coils are temperature-sensitive sensors used to regulate the temperature of devices. The bimetallic coil is formed by bonding two different metals together and winding them into a coil shape.

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Gravity The principal factor governing the planets' orbits around the sun is gravity. While each planet has its own gravity that is determined by its size and speed of motion, orbit is determined by the gravity of the sun.

If you were to stand on the surface of any planet in the solar system, or, in the case of the ice giants, float in its atmosphere, you would feel the following gravitational pull: Venus: 0.9 g Mercury: 0.38 g Moon: 0.17 g Mars: 0.38 g Saturn: 1.07 g Jupiter: 2.53 g 0.89 g Uranus Jupiter: 1.14 g The Planets' Gravitational Pull The two driving forces that propel the planets around the sun.

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Explanation:

The true statement about gravity is that it is the force of attraction between two objects with masses and also, based on the distance between these objects.

Gravity is a force of attraction.

The best scientific overview of the force of gravity is given by the Newton's law of universal gravitation which states that "the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them",

So, gravitational force of attraction is dependent on mass and the distance between two bodies.

To determine the internal resistance of the battery, we can use Ohm's Law and the concept of potential difference.

Ohm's Law states that the current flowing through a resistor is directly proportional to the potential difference across it. Mathematically, Ohm's Law can be written as:

V = I * R

Where:

V is the potential difference (voltage)

I is the current

R is the resistance

In this case, we have a 10 Ω resistor and a current of 0.5 Amps flowing through it. The potential difference (V) across the resistor is given as 50 Volts.

Using Ohm's Law, we can rearrange the equation to solve for the resistance (R):

R = V / I

Substituting the given values, we have:

R = 50 V / 0.5 A = 100 Ω

Now, let's consider the internal resistance (r) of the battery. The total resistance (R_total) in the circuit is the sum of the resistor resistance (R) and the internal resistance (r):

R_total = R + r

Since we know that the current flowing through the circuit is 0.5 Amps, we can use this information to determine the total resistance:

Comparing this to the expression for R_total, we can conclude that the internal resistance (r) of the battery must be zero, as any non-zero value would result in a different total resistance.

Therefore, the correct option is (a) \( 0.00 \Omega \).

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Answer:

(a) - \(R_{eq.}=8 \ \Omega\)

(b) - \(I_1=3 \ A, \ I_2= 1.8 \ A, \ I_3=1.2 \ A\)

(c) - \(\Delta V_1=6 \ V, \ \Delta V_2= 18\ V, \ \Delta V_3= 18 \ V\)

Conceptual:

Things to know about parallel/series resistors:

A resistor takes electrical energy and converts it to some other form of energy, such as heat. In doing so this can alter a circuit's current and divide voltages.

Electrical current is the flow of charged particles.

To put it simply, voltage is what "pushes" current through a circuit.

\(\boxed{\left\begin{array}{ccc}\text{\underline{Ohm's Law:}}\\\\\Delta V=IR\end{array}\right}\)

How you should tackle these types of problems:

I recommend combining resistors until you have one resistor. This one resistor is what your total resistance is, which I call the equivalent resistor. Then work backwards from the equivalent resistor to find any information you need, utilizing Ohm's law and properties of parallel/series resistors.

Step-by-step:

Refer to the attached image(s).

Answer:

I think they use it at night because they want to avoid involving themselves in road accident while crossing the street. When there are reflective strips on their clothes, drivers do notice them even at far ends of the street since the strips will reflect the rays from the car lights to the driver,hence, the driver notifies that there is a pedestrian crossing and therefore slows down.

Answer:

the type of tomato plants used.

Explanation:

Answer:

A . Force

C . Velocity .

D . Acceleration .

Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

When an object is projected at angle, it will have some horizontal and vertical velocities. there no horizontal motion, projectile's horizontal component stays the same.

To determine the drag on the car when it is driven through still air at 55 mph, we need to use the formula: drag = (1/2) × density of air × velocity² × drag coefficient × cross-sectional area of the car. Assuming standard conditions, the density of air is 1.225 kg/m³ or 0.0023769 lb/ft³. Converting the velocity to ft/s, we get 80.67 ft/s. Plugging in the given values, we get:
drag = (1/2) × 0.0023769 × 80.67² × 0.21 × 30
drag = 215.3 lb
Therefore, the drag on the car when driven through still air at 55 mph is 215.3 lb. To determine the drag on the car when driven into a 25 mph wind, we need to add the velocity of the wind to the velocity of the car. Therefore, the total velocity is 80.67 + 25 = 105.67 ft/s. Using the same formula and plugging in the new velocity, we get:
drag = (1/2) × 0.0023769 × 105.67² × 0.21 × 30
drag = 337.2 lb
Therefore, the drag on the car when driven into a 25 mph wind is 337.2 lb.

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The drag on a car is the resistance that it experiences as it moves through the air. The drag force is proportional to the air density, the velocity of the car, the drag coefficient, and the cross-sectional area of the car. The formula to calculate drag force is:

Drag force = 0.5 x air density x velocity^2 x drag coefficient x area
In this case, the drag coefficient is predicted to be 0.21, and the cross-sectional area of the car is 30 ft2. We are given the velocity of the car, which is 55 mph.
First, we need to convert the velocity from miles per hour (mph) to feet per second (fps). We know that 1 mph is equal to 1.47 fps. Therefore:
55 mph x 1.47 fps/mph = 80.85 fps
The air density at sea level is approximately 0.00237 slugs/ft3. Therefore, we can calculate the drag on the car as follows:
Drag force = 0.5 x 0.00237 slug/ft3 x (80.85 fps)^2 x 0.21 x 30 ft2
Drag force = 131.28 pounds of force (lbf)
This means that when the car is driven through still air at 55 mph, it experiences a drag force of 131.28 lbf.
Now, let's consider the case where the car is driven into a 25 mph headwind. In this case, the velocity of the car relative to the ground is:
55 mph - 25 mph = 30 mph
We need to convert this velocity to fps:
30 mph x 1.47 fps/mph = 44.1 fps
Using the same formula as before, we can calculate the drag on the car:
Drag force = 0.5 x 0.00237 slug/ft3 x (44.1 fps)^2 x 0.21 x 30 ft2
Drag force = 48.77 lbf
This means that when the car is driven into a 25 mph headwind, it experiences a drag force of 48.77 lbf.

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Here,

Size of object = 1.5 m;

Object distance (u) = - 2m = -200cm

focal length (f) = - 3.0 cm

Image distance (v) = ?

Using lens formula

Now magnification is given by

Final answer is :-

Image distance = - 2.96 cm & magnification = 0.0148

The total electric potential energy that can be stored in a 16.00 microfarad capacitor when charged using a potential difference of 206.0 V is 7.216 J.

The formula to determine the electric potential energy stored in a capacitor is:

Electric Potential Energy = 1/2 x Capacitance x (Potential Difference)^2

Plugging in the given values, we get:

Electric Potential Energy = 1/2 x 16.00 microfarad x (206.0 V)^2

Electric Potential Energy = 1/2 x 16.00 x 10^-6 F x (206.0 V)^2

Electric Potential Energy = 1/2 x 16.00 x 10^-6 F x 42,436 V^2

Electric Potential Energy = 7.216 J

Electric potential energy is the energy that a charged particle or system of charged particles possess by virtue of their position in an electric field. It is the potential energy that exists within a system of electric charges due to their interaction with each other through the electric field.

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Alpha particles have highest mass.

Alpha particles are most ionising.

Gamma particles are the most penetrating.

Beta particles are negatively charged.

Gamma particles have the highest speed.

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Answer:

A small car could cost about $11.50 to $23 to fully charge while a bigger or long-distance vehicle could cost between $22.50 to $45.

Explanation:

Answer:

19.6N

Explanation:

we use the formula weight= mass × gravity

thus we say weight= 2 × 9.8

which equals 19.6N

Answer:

the final velocity of the car is 59.33 m/s [N]

Explanation:

Given;

acceleration of the car, a = 13 m/s²

initial velocity of the car, u = 120 km/h = 33.33 m/s

duration of the car motion, t = 2 s

The final velocity of the car in the same direction is calculated as follows;

v = u + at

where;

v is the final velocity of the car

v = 33.33 + (13 x 2)

v = 59.33 m/s [N]

Therefore, the final velocity of the car is 59.33 m/s [N]

It is most likely that the pressure is measured in atmospheres, the volume in liters, the number of moles in moles, and the temperature in Kelvin.

In the ideal gas law, the gas constant (R) is represented by different values depending on the units used. The value of 0.0821 L·atm/mol·K is one of the commonly used values for R when pressure is measured in atmospheres (atm), volume in liters (L), and temperature in Kelvin (K).
To determine what is most likely true about the variables in the ideal gas law, we need to look at the equation:

PV = nRT

- P represents the pressure of the gas in atmospheres
- V represents the volume of the gas in liters
- n represents the number of moles of gas
- R represents the gas constant
- T represents the temperature of the gas in Kelvin

Since the given value of the gas constant is 0.0821 L·atm/mol·K, it suggests that the variables in the ideal gas law are likely to be measured in the corresponding units (atm, L, mol, and K).

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Answer:

Inertia

F=ma

Action, reaction

All of the above

A heavy object requires more force to push than a lighter object.