Keeping in mind Newton’s First Law of Motion, if a rock is thrown it should stay in motion at a constant velocity. Why doesn’t it do that?


Momentum acts as a force to change its behavior.


You didn’t throw it hard enough.


Gravity acts as a force to change its behavior.


It needs an external force and an internal force to stay in motion.

Answer:

-30m

Explanation:

displacement = final position - initial position, or d = -20-10

Answer:

the moment of inertia with the arms extended is Io and when the arms are lowered the moment

I₀/I > 1    ⇒   w > w₀

Explanation:

The angular momentum is conserved if the external torques in the system are zero, this is achieved because the friction with the ice is very small,

           L₀ = L_f

           I₀ w₀ = I w

          w =\(\frac{I_o}{I}\) w₀

where we see that the angular velocity changes according to the relation of the angular moments, if we approximate the body as a cylinder with two point charges, weight of the arms

          I₀ = I_cylinder + 2 m r²

where r is the distance from the center of mass of the arms to the axis of rotation, the moment of inertia of the cylinder does not change, therefore changing the distance of the arms changes the moment of inertia.

If we say that the moment of inertia with the arms extended is Io and when the arms are lowered the moment will be

        I <I₀

        I₀/I > 1    ⇒   w > w₀

therefore the angular velocity (rotations) must increase

in this way the skater can adjust his spin speed to the musician.

Answer:

375 km

Explanation:

Using the equation, d = vt, we simply plug in the numbers:

v = 150 km/hr

t = 2.5 h

d = (150 km/hr)*(2.5 h)

d = 375 km

The reverse both the direction of the magnetic field and the flow of current in a conductor at the same time, the direction of the Lorentz Force would also reverse.

The current flows through a conductor in a magnetic field, the Lorentz Force acts in a direction perpendicular to both the current and the magnetic field. This causes the conductor to experience a force, which can be used to perform work or generate electricity. If the direction of the magnetic field or the current is reversed, the direction of the Lorentz Force will also reverse, causing the conductor to experience a force in the opposite direction. This phenomenon is used in many applications, including electric motors and generators. By reversing the direction of the magnetic field and the current, the direction of the Lorentz Force can be changed, allowing for the creation of torque or electrical energy. Understanding the interaction between magnetic fields and conductors is crucial for many technological advancements and has led to the development of many innovative devices and systems.

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Option D: wind spinning turbine blades spins a turbine to generate electricity in a concentrated solar power (CSP) system.

A turbine in CSP system uses wind to transform kinetic energy into electrical energy. A rotary machine is a water turbine. It produces mechanical work by converting the kinetic energy of wind. After that, the work is turned into electrical energy. They are mostly employed in the creation of electric power. Dams employ water turbines to harness the potential energy of the water to produce electricity. Similar to this, a water turbine transforms kinetic energy into electrical energy to produce power.

Potential energy can be found in electrical batteries. The battery stores its electrical potential energy as the electrons flow from the cathode to the anode. This chemical potential energy is then transformed into electrical energy. The chemical energy is changed into electrical energy in this situation.

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Answer:

I think it's 7 × 10²

Explanation:

0.0035 time 200000 is 700 and 700 in scientific notation is 7 × 10²

Though i'm not certain if that is correct

Answer:

8) Heat energy is the form energy that is transferred from one object to another with different temperatures. Sun is the source of heat energy.

The distance d that the proton has been deflected downward when it leaves the plates is 12.0 cm.

The proton encounters a uniform electric field generated by two charged plates. The magnitude of the electric field in this region is 4.0 x 10⁵ NIC (newtons per unit charge) and the proton's velocity is 1.5 x 10⁷ m/s.

We have to determine the distance d that the proton has been deflected downward when it leaves the plates. The proton's charge is +1.6 x 10⁻¹⁹ C, and its mass is 1.67 x 10⁻²⁷ kg.

The electric field force acting on the proton is given by:

F = qE

where F is the force, q is the charge on the proton, and E is the electric field

The electric field force is given by:

F = (1.6 x 10⁻¹⁹ C)(4.0 x 10⁵ N/C)

F = 6.4 x 10⁻¹⁴ N

The magnitude of the electric field force is 6.4 x 10⁻¹⁴ N.

The force on the proton can be determined using the formula:

F = ma

Here, F represents the force acting on the proton, m denotes the mass of the proton, and a corresponds to the acceleration experienced by the proton.

The acceleration of the proton is given by:

a = F/m

Substituting values,

a = (6.4 x 10⁻¹⁴ N)/(1.67 x 10⁻²⁷ kg)

a = 3.83 x 10^12 m/s²

The distance traveled by the proton when it leaves the plates is given by:

d = (1/2)at² + vt

where d is the distance, a is the acceleration, t is the time, and v is the initial velocity.

Substituting values,

d = (1/2)(3.83 x 10¹² m/s²)(t²) + (1.5 x 10⁷ m/s)(t)

Since the proton is moving in a straight line, the time it spends in the electric field is:

t = (2d)/(1.5 x 10⁷ m/s)

Substituting values,t = (2 x 0.12 m)/(1.5 x 10⁷ m/s)t = 1.6 x 10⁻⁸ s

Substituting this value in the equation for distance,

d = (1/2)(3.83 x 10¹² m/s²)(1.6 x 10⁻⁸ s)² + (1.5 x 10⁷ m/s)(1.6 x 10⁻⁸ s)d = 1.2 x 10⁻¹ md = 12.0 cm

Thus, the distance d that the proton has been deflected downward when it leaves the plates is 12.0 cm.

The question should be:
A proton enters the uniform electric field produced by the two charged plates shown below: The magnitude of the electric field is 4.0 X 105 NIC, and the speed of the proton when it enters is 1.5 X 107 m/s. What distance d has the proton been deflected downward when it leaves the plates?

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effort distance/resistance distance or length of ramp/height of ramp or dE/dr  is correct for calculating the ideal mechanical advantage

Theideal mechanical advantage would not have any friction. this is due to the fact that some of the effort put into the machine is lost trying to overcome friction.

ideal mechanical advantage is denoted by the sign IMA, that ignores the drawbacks of friction.

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9) A vector describe as a quantity that has both magnitude and direction. 10) We use vectors to describe in physics in physical quantities, including displacement, velocity, acceleration, force, momentum, and torque.

The vector is typically represented by an arrow, with the length of the arrow representing the magnitude of the vector and the direction of the arrow representing the direction of the vector. In addition to the magnitude and direction, vectors also have a starting point and an end point. Vectors can be added together to obtain a resultant vector that represents the sum of the individual vectors. Vectors can also be subtracted, multiplied by a scalar, or divided by a scalar.

For example, displacement is a vector that describes the distance and direction between two points. Velocity is a vector that describes the speed and direction of motion and acceleration is a vector that describes the rate at which velocity changes. Force is a vector that describes the push or pull on an object and momentum is a vector that describes the motion of an object and its resistance to change. Torque is a vector that describes the rotational motion of an object. So therefore vectors are an important tool for physicists because they allow them to describe physical quantities in a way that is both concise and precise.

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An internal combustion engine is an engine in which combustion takes place inside the engine and is used to generate mechanical power.

Step 1: Intake: During the intake stroke, the engine takes in air (if it is naturally aspirated) or a mixture of air and fuel (if it is fuel-injected) and compresses it. In the combustion chamber, this mixture is drawn in through the intake valve. The carburetor mixes the fuel and air, while the fuel injectors inject fuel directly into the combustion chamber.

Step 2: Compression: During the compression stroke, the piston moves back up to compress the mixture of air and fuel. The spark plug fires, igniting the compressed mixture of air and fuel, and generating a tremendous amount of heat.

Step 3: Combustion: When the spark plug ignites the fuel-air mixture, the mixture ignites and burns, causing a rapid expansion of the hot gases and the expulsion of the piston. This energy is used to generate power by pushing the piston down, which turns the crankshaft. This energy is then transmitted to the wheels via the transmission.

Step 4: Exhaust:During the exhaust stroke, the exhaust valve opens, and the piston moves up to push the hot gases out of the combustion chamber. The exhaust system then takes the hot gases away from the engine and discharges them into the atmosphere.

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The purpose of the helical structure in a traveling-wave tube is to (d) enhance the bunching effect that occurs for the positive charge carriers in the electron beam.

The helical structure in a traveling-wave tube serves as an interaction circuit between the electron beam and the electromagnetic wave. The interaction between the beam and the wave leads to a phenomenon known as bunching, where the electrons in the beam are grouped together in a more compact manner. Bunching is crucial for efficient energy transfer from the electron beam to the electromagnetic wave.

The helical structure plays a key role in enhancing this bunching effect. As the electron beam travels through the helix, the helical structure provides a periodic electric field that interacts with the beam. This interaction causes the electrons to experience a force that synchronizes their motion with the electromagnetic wave. The synchronized motion results in the formation of electron bunches or density modulations within the beam.

By enhancing the bunching effect, the helical structure increases the efficiency of energy transfer from the electron beam to the electromagnetic wave. The bunches of electrons in the beam interact more effectively with the electromagnetic wave, leading to greater amplification and modulation of the signal carried by the wave.

It's important to note that the other options mentioned, such as (a) forming a helical resonator, (b) serving as an inductor, or (c) reducing the speed of the electromagnetic wave, are not the primary functions of the helical structure in a traveling-wave tube. While resonators and inductors can be present in the design of a traveling-wave tube, their functions are separate from the role of the helical structure in enhancing bunching and facilitating efficient energy transfer.

Therefore, in a traveling-wave tube, the primary purpose of the helical structure is to enhance the bunching effect for positive charge carriers in the electron beam, leading to improved energy transfer and amplification of the signal carried by the electromagnetic wave.

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A man whose mass is 40kg walk up a flight of 20 step each 150mm height in 10 sec. The average power developed is 12.0 W.

The average power developed by the man as he walks up the stairs, you need to know the work he does and the time it takes him to do it. First, you can find the work done by the man by multiplying his weight (which is equal to his mass multiplied by the acceleration due to gravity) by the distance he travels:

= Work = (40 kg) x (10 m/s^2) x (20 steps x 0.150 m/step)

= 120 J

Then, you can divide the work done by the time it takes to do it to find the average power developed:

= Power = Work / Time

= 120 J / 10 s

= 12.0 W

So, the average power developed by the man as he walks up the stairs is 12.0 W.

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Answer:

Depending on the tempetures he's most likly looking to see what temp it will grow under and which one grows the fastest

Explanation:

Answer:

Depending on the tempetures he's most likly looking to see what temp it will grow under and which one grows the fastest

Explanation:

Answer:

(D) 421 kPa

Explanation:

The absolute pressure of the tire is equal to the pressure measured plus the atmospheric pressure of 101 kPa. Then, the absolute pressure is

P = 320 kPa + 101 kPa

P = 421 kPa

So, the answer is

(D) 421 kPa

The resistance of a circuit that contains two 50.0 Ω resistors connected in series with a 12.0 V battery is 100 Ω. The resistance of the circuit is equal to the sum of the individual resistors when they are connected in series.

In this case, two 50.0 Ω resistors are connected in series, resulting in a total resistance of 100 Ω. Resistance can be defined as the obstruction that electricity faces when it travels through a conductor. The greater the resistance, the less current is allowed to flow through the circuit. The following equation is used to calculate resistance: R = V / IWhere R is resistance, V is voltage, and I is current.

Resistance can also be calculated using Ohm's Law if we know the values of voltage and current. When resistors are connected in series, the total resistance of the circuit is equal to the sum of the individual resistors. This is expressed by the following equation:RT = R1 + R2 + ... + RNWhere RT is the total resistance of the circuit, and R1, R2, and RN are the individual resistors. In this case, the circuit contains two 50.0 Ω resistors connected in series.

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The Once-ler in Dr. Seuss's "The Lorax" found the natural resource of Truffula trees.

In the story, the Once-ler discovers a lush forest filled with Truffula trees, which he chops down to produce a product called Thneeds. As he becomes more successful, he builds a factory and hires more workers to chop down more trees, causing widespread environmental destruction.

The natural resource that the Once-ler finds is the Truffula trees, which he uses to create his product. The Truffula trees are a fictional resource that represent the real-life issue of deforestation and the destruction of natural habitats. The story highlights the importance of environmental conservation and the consequences of exploiting natural resources without regard for the long-term effects on the environment.

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The time constant (in ms) of the RC circuit is 3.75 ms. Hence, the correct option is  (d) 3.75 ms.

The rate of decay of the current in a charging capacitor is proportional to the current in the circuit at that time. Therefore, it takes longer for a larger current to decay than for a smaller current to decay in a charging capacitor.A capacitor is discharged through a 20.0 Ω resistor.

The discharge current decreases to 22.0% of its initial value in 1.50 ms. We can obtain the time constant of the RC circuit using the following formula:$$I=I_{o} e^{-t / \tau}$$Where, I = instantaneous current Io = initial current t = time constant R = resistance of the circuit C = capacitance of the circuit

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The time constant of the RC circuit is approximately 0.674 m s.

To determine the time constant (τ) of an RC circuit, we can use the formula:

τ = RC

Given that the discharge current decreases to 22.0% of its initial value in 1.50 m s, we can calculate the time constant as follows:

The percentage of the initial current remaining after time t is given by the equation:

I(t) =\(I_oe^{(-t/\tau)\)

Where:

I(t) = current at time t

I₀ = initial current

e = Euler's number (approximately 2.71828)

t = time

τ = time constant

We are given that the discharge current decreases to 22.0% of its initial value. Therefore, we can set up the following equation:

0.22 =\(e^{(-1.50/\tau)\)

To solve for τ, we can take the natural logarithm (ln) of both sides:

ln(0.22) = \(\frac{-1.50}{\tau}\)

Rearranging the equation to solve for τ:

τ = \(\frac{-1.50 }{ ln(0.22)}\)

Calculating this expression:

τ ≈ 0.674 m s

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Answer:

1.4 m/s/s (2.s.f)

Explanation:

The formula for centripetal acceleration is:

\(a=\frac{v^{2} }{r}\), where v is velocity and r is the radius.

In the question we are given the information that the car has a mass of 1300kg, a velocity of 2.5m/s, and a turn radius of 8.5m which are all the values we need. Therefore we can simply substitute in the values to solve the question:

\(a=\frac{3.5^{2} }{8.5} \\a=1.4\)

Therefore the centripetal acceleration of the car is 1.4m/s/s. (2.s.f)

Hope this helped!

Answer:

69 meters

Explanation:

The acceleration of this car include the following: A. 2 m/s².

In Science, the acceleration of a car can be calculated by using this mathematical expression:

a = (V - U)/t

Where:  

By substituting the given parameters into the acceleration formula, we have;

Acceleration, a = (40 - 10)/15

Acceleration, a = 30/15

Acceleration, a = 2 m/s².

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You and your friends are revolving at the same speed. As a result, your friend and you both have the same angular velocity.

Now that we have the formula for linear velocity—V = omega—we can move on to the following section and draw the conclusion that if the relationship between and grows, so will we.

From here, we may also infer that the radius is larger in this instance because you are close to the right edge. Since you and your friend have different linear velocities and you have the higher linear velocity. If you've ever actually been on a merry-go-round, you already know that being on the edge is considerably more enjoyable rotation than being in the centre.

However, there is a similarity between the two people who are moving about. In the same amount of time, they will each cover the same rotation. The term "angular velocity" refers to a speed that measures the angle of rotation over a specified period of time.

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Represent the airplane's airspeed as a vector. The magnitude is 345 mph, and the direction is 124 degrees (measured clockwise from due north). Let's call this vector A.

2. Represent the wind speed as a vector. The magnitude is 23 mph, and the direction is from the west, which is 270 degrees (measured clockwise from due north). Let's call this vector W.

3. Find the components of both vectors A and W. We can do this using trigonometry:

  A_x = 345 * cos(124°)
  A_y = 345 * sin(124°)

  W_x = 23 * cos(270°)
  W_y = 23 * sin(270°)

4. Add the components of vectors A and W to find the components of the groundspeed vector G:

  G_x = A_x + W_x
  G_y = A_y + W_y

5. Calculate the magnitude of the groundspeed vector G:

  Groundspeed = |G| = sqrt(G_x^2 + G_y^2)

6. Calculate the course of the airplane (the angle of vector G):

  Course = arctan(G_y / G_x)

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A hockey puck can transfer kinetic energy by

When a hockey player hits the puck with their stick, they transfer kinetic energy to the puck.

The puck then moves across the ice, and if it collides with another object (such as the boards or another player's stick), some of the kinetic energy from the puck is transferred to that object through touch.

This demonstrates that kinetic energy can move from one item to another and that energy transfers from materials through touch.

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The tension in the rope is equal to the weight of the woman, which is 120 lb. Since the woman is not accelerating, the forces acting on her must be balanced, meaning the tension in the rope must equal her weight. Therefore, the tension in the rope is 120 lb.

What is tension?

Tension is a state of mental or emotional strain, resulting from opposing forces or influences. It is a feeling of inner strain caused by a clash of emotions, ideas, or beliefs. It can also result from physical causes such as a lack of sleep, worry, physical exertion, and even hunger.

Tension can manifest itself in physical symptoms such as headaches, neck pain, muscle tightness, and fatigue. It can also lead to emotional problems such as anxiety, irritability, and depression. It is important to recognize and address tension in order to maintain good mental and physical health.

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The activity of 1.0 g of 226Ra is approximately 2.19 x \(10^4\) Bq.

Activity = decay constant x number of atoms

The decay constant of 226Ra is:

decay constant = ln(2) / half-life = ln(2) / (1600 years x 365.25 days/year x 24 hours/day x 3600 seconds/hour) ≈ 4.95 x \(10^{-12} s^{-1\)

The number of atoms in 1.0 g of 226Ra is:

number of atoms = mass / molar mass = 1.0 g / 226 g/mol = 4.42 x \(10^{-3\)mol

Multiplying the decay constant and the number of atoms, we get:

Activity = decay constant x number of atoms = (4.95 x \(10^{-12} s^{-1\)) x (4.42 x \(10^{-3\) mol) ≈ 2.19 x \(10^4\) Bq

The decay constant is a measure of the probability of a radioactive atom decaying per unit of time. It is a fundamental concept used to describe the behavior of radioactive decay and is denoted by the symbol λ (lambda). The decay constant is related to the half-life of a radioactive material, which is the time required for half of the material to decay.

The decay constant is determined by the type of radioactive decay, as each type of decay has a unique probability of occurring. For example, the decay constant for alpha decay is typically much higher than that of beta decay. The decay constant can be calculated using the activity of the radioactive material, which is the rate at which it emits radiation. The decay constant is a critical parameter in the prediction of the behavior of radioactive materials and their potential impact on the environment.

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Answer:

5.5 times 10^7

Explanation:

Answer:

what??!?!? the question is unclear, what exactly are you asking?

Answer:

maybe if there is an image you want to post i could help you? this is unclear. But that's okay, hope your having an okay day :)

Explanation: