Identical balls are dropped from the same initial height and bounce back to half the initial height. In Case 1, the ball bounces off a cement floor, and in Case 2, the ball bounces off a piece of stretchy rubber. Two cases of a ball dropping and bouncing off of a surface. In case one, the ball approaches a cement floor, comes in contact, momentarily comes to rest, and then bounces off with a velocity smaller than the approach velocity. In case 2, the ball approaches a piece of stretchy rubber. When the ball comes in contact with the rubber, it deforms the rubber and comes momentarily to rest. The ball bounces off again with a velocity smaller than the approach velocity, and the rubber regains its original shape. In both cases, the balls are dropped from the same initial height and reach the same final height. In which case is the magnitude of the ball's change in momentum the greatest

Answer:

bonus questions:becz displacement work only with the help of any force or object and distance is the totl length of two points

A unit can be used for measurement, and is commonly found in mathematics to describe length, size, etc.

A ratio has two or more numbers that symbolize relation to each other. Ratios are used to compare the numbers, and you can compare them using division.

We first would need to know the ratio of centimeters to meters.

1 centimeter = 0.01 meter

Now that we know this, we can take 120cm (number of steps) and multiply that by 70cm (size of each step).

120 × 70 = 8400

Now that we have the total amount of centimeters, we can multiply that by 0.01 (or divide by 100) to get the number of meters the scout traveled.

8400 × 0.01 = 84

This means that the scout traveled 84 meters.

Answer:

B) Bromine

Explanation:

The second question is: Number the elements sodium, magnesium, and potassium in the predicted order of ionic radius from the largest (1) to the smallest (3).

___ sodium

___ magnesium

___ potassium

Answer:

2

3

1

Bromine has a larger ionic radius than chlorine.

The periodic table is an arrangement of elements in order increasing atomic number. The elements are arranged in groups and periods. The elements in the same group have the same number of valence electrons while the elements in the same period have the same number of shells.

The ionic radii of elements increases down the group. Since bromine is lower in group 17 than chlorine in group 17, bromine has a larger ionic radius than chlorine.

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El lanzamiento de proyectiles permite calcular el angulo de lanzamiento o elevación  para alcanzar el objetivo es:  9.3º

El lanzamiento de proyectiles es una aplicación de la cinemática donde en el eje x ( horizontal) no hay aceleración y el el eje y (vertical) con sentido positivo hacia arriba tiene la aceleración de la gravedad.

El rango de lanzamiento de proyectiles es la distancia horizontal recorrida para la misma altura inicial.

               \(R = \frac{vo^2 sen 2 \theta}{g}\)  

Donde R es el alcance, v₀ la velocidad inicial, θ el angulo de lanzamiento o elevación y g la aceleración de la gravedad.

             sen 2θ =  \(\frac{gR}{vo^2 }\)

             2θ = sen⁻¹ \(\frac{gR}{vo^2}\)  

calculemos

              2θ = sin⁻¹ ( \(\frac{9.8 \ 4000}{350^2 }\) )

              θ =  18,662 /2

              θ =  9.3º

En conclusion usando el lanzamiento de proyectiles podemos calcular el angulo de lanzamiento para alcanzar el objetivo es:  9.3º

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Answer:

Explanation:

In the microscopic world of quantum mechanics, particles don't behave like familiar everyday objects. They can exist in multiple states simultaneously and behave as both particles and waves. When we try to measure or observe a particle, we typically use light or other particles to interact with it. However, this interaction can disturb the particle's state. Imagine trying to measure the position of an electron using light. Light consists of photons, and when photons interact with the electron, they transfer energy to it. This energy exchange causes the electron's position and momentum to become uncertain. The more precisely we try to measure its position, the more uncertain its momentum becomes, and vice versa. This is known as the Heisenberg uncertainty principle.

So, the act of observing a particle disturbs its state because the interaction between the observer and the particle affects its properties. The very act of measurement or observation introduces a level of uncertainty and alters the particle's behavior. It's important to note that this behavior is specific to the quantum world and doesn't directly translate to the macroscopic world we experience in our daily lives. Quantum mechanics operates at extremely small scales and involves probabilities and uncertainties that are not typically noticeable in our macroscopic observations.

Answer:

Explanation:

A television set is plugged into a 120 V outlet. The television circuit carries a current equal to 0.75 A. What is the overall resistance of the television set?​

V = IR

120 volt = 0.75A * R

R = 160 Ω

Statements 1,2,3 and 4 match statements B, C, A, and D respectively.A wind turbine converts rotational energy into electrical energy.

According to the Law of conservation of energy. Energy can not be created nor be destroyed, it can transfer from one to another form.

1.A wind turbine converts rotational energy into electrical energy.

2.A roller coaster going downhill converts gravitational energy into mechanical energy

3. Toaster converts electrical energy into thermal energy

4.A car converts rotational energy into mechanical energy.

Hence,statements 1,2,3 and 4 match statements B, C, A, and D respectively.

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Answer:

approximately 6.67 m/s

Explanation:

the equation for speed when given momentum and mass is

Speed=momentum/mass

Answer:

Below

Explanation:

Momentum = m * v

 40              =   6 * v

40/6 = v = 6  2/3   m/s     ( or ~  6.7 m/s)

The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematic equations are a set of equations that can derive an unknown aspect of the motion of a body if the other aspects are provided.

Answer:

combustion reaction

glucose,oxygen

carbon dioxide,water,energy

8

no. required balanced equation is:

C6H12O6+6O2--->6CO2+6H2O+energy

endothermic as it needs heat in the form of sunlight.

Answer:

Hi ??? what is your question

Answer:

Electromagnetic waves

Answer:

893.8 [kJ].

Explanation:

1) the total heat can be calculated as

E=Q₁+Q₂+Q₃, where Q₁ - energy to heat the ice from -4 to 0; Q₂ - energy to melt the ice; Q₃ - to heat the water at 0 °C to 25 °C;

2) Q₁=λ*m*Δt₁, ⇒ Q₁=2100*2*4=16800 [J];

3) Q₂=c₂*m; ⇒ Q₂=333500*2=667000 [J];

3) Q₃=c₃*m*Δt₂; ⇒ Q₃=4200*2*25=210000 [j];

4) finally, the required heat is

E=16800+667000+210000=893800 [J]=893.8 [kJ].

Any moving object has momentum. The momentum of an 11 kg bowling ball rolling at 4 m/s is 44 kg m/s.

The momentum is defined as a quantity which is the product of the mass of the particles and its velocity. It is a vector quantity. It has both magnitude and direction. The rate of change of momentum is equal to the force acting on the particle.

The equation of the momentum is given as:

p = mν

= 11 kg × 4 m/s

= 44 kg m/s

Thus the momentum of the bowling ball is 44 kg m/s.

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(a) Velocity with which the mug leaves the counter is approximately 5.02 m/s.

(b) The direction of velocity of mug just before it hits the floor is downwards, since mug is falling under influence of gravity.

Velocity is a quantity that designates how fast and also in what direction a certain point is moving.

(a) As we know, PE = m g h

\(\mathrm{PE = mgh }\)

\(\mathrm{= (m)(9.81 m/s^2)(1.36 m) }\)

= 13.4mJ

\(\mathrm{KE =\frac{1}{2} mv^2}\)

PE = KE

\(\mathrm{mgh = \frac{1}{2}mv^2}\)

\(\mathrm{v = \sqrt{2gh}}\)

\(\mathrm{v = \sqrt{2 \times 9.81 \times 1.36 m}}\)

v = 5.02 m/s

Therefore, the velocity with which the mug leaves the counter is approximately 5.02 m/s.

(b) The direction of the velocity of mug just before it hits the floor is downwards, since mug is falling under the influence of gravity. Velocity vector has a vertical component that points downwards and horizontal component that is parallel to counter.

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Hi there!

Part A:

The only quantities explicitly given to us are:

3. mass (m)

4. Maximum velocity (vmax)

5. Amplitude (A)

8. Position x from equilibrium

Part B:

To solve, we must begin by calculating the force constant, 'k'.

We can use the following relationship:

\(v = \sqrt{\frac{k}{m}(A^2-x^2)\)

We are given the max velocity which occurs at a displacement of 0 m, because the mass is the fastest at the equilibrium point. We can rearrange the equation for k/m:

\(\frac{v^2}{(A^2-x^2)} = \frac{k}{m}\)

\(\frac{3.2^2}{(0.06^2-0)} = \frac{k}{m} = 2844.44\)

Now, we can find the velocity at 4.7cm (0.047m) using the equation:

\(v = \sqrt{(2844.44)(0.06^2-0.047^2)} = 1.989 m/s\)

Plug this value into the equation for kinetic energy:

\(KE = \frac{1}{2}mv^2\\\\KE = \frac{1}{2}(0.05)(1.989^2) = \boxed{0.0989 J}\)

Part C:

The potential energy of a spring is given as:

\(U = \frac{1}{2}kx^2\)

Find 'k' using the derived quantity above:

\(\frac{k}{m} = 2844.44\\\\k = 2844.44m = 142.22 N/m\)

Now, calculate potential energy:

\(U = \frac{1}{2}(142.22)(0.047^2) = \boxed{0.157 J}\)

Answer:

24.8 :D

Explanation:

Answer:

C.sugar-free gum

Explanation:

Answer:

If N is the number of forces acting on a body, the net force formula is given by, FNet = F1 + F2 + F3

Explanation:

Answer:

Ellipses are required in engineering, architectural, and machine drawings for two main reasons. First, any circle viewed at an angle will appear to be an ellipse. Second, ellipses were common architectural elements, often used in ceilings, staircases, and windows.

The ellipse is one of the four classic conic sections created by slicing a cone with a plane. The others are the parabola, the circle, and the hyperbola. The ellipse is vitally important in astronomy as celestial objects in periodic orbits around other celestial objects all trace out ellipses.

The frequency at which the capacitive reactance is 375 ω and the Capacitance of 3.25 μF is 131 s⁻¹.

Capacitance is the ability or capacity of the substance to collect and store electrical energy and the unit of capacitance is Farad (F). Capacitive reactance is the term that measures the opposition to current flow in the AC circuits and the unit of capacitive reactance is the ohm(Ω).

From the given,

The capacitive reactance (Xc) = 375ω

capacitance (C) = 3.25μF

capacitive reactance Xc = 1/(2π×f×C)

Frequency (f) = 1/(2π×Xc×C)

                     = 1/(2×3.14×375×3.25×10⁻⁶)

                     = 131 s⁻¹.

Thus, the frequency of the capacitive reactance is 131 s⁻¹.

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Answer:

The graph of the velocity of an object in free fall would look like a straight line sloping downward. As the object falls, its velocity increases at a constant rate, so the graph of its velocity versus time will be a straight line with a negative slope. This is because acceleration due to gravity is a constant -9.8 meters per second squared, so the velocity of a free-falling object will increase by 9.8 meters per second every second.

Therefore, the graph that shows the change in velocity of an object in free fall is a straight line with a negative slope. Here is an example of such a graph:

Free Fall Velocity Graph

ANSWER

circuit breaker

EXPLANATION

A circuit breaker is an automatic switch that is activated to protect an electrical circuit when an sudden increase in the circuit's current appears. This could happen when there's an overload or a short circuit.

The final velocity of the green ball is 5.0 m/s.

The final speed of the green ball can be determined using the law of conservation of momentum.

The momentum of the system (red and green ball) before the collision is equal to the momentum of the system after the collision, assuming there are no external forces acting on the system.

Before the collision, the momentum of the red ball is given by:

p1 = m1v1 = 0.50 kg   x 10 m/s = 5.0 kg m/s

After the collision, the momentum of the green ball is given by:

p2 = m2  x v2

Using the law of conservation of momentum, we have:

p1 + p2 = (m1 + m2) v1

5.0 kg m/s + p2 = (0.50 kg + 0.50 kg) x 10 m/s

5.0 kg m/s + p2 = 1.0 kg * 10 m/s

5.0 kg m/s + p2 = 10.0 kg m/s

p2 = 10.0 kg m/s - 5.0 kg m/s = 5.0 kg m/s

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Answer: the time for the car to drive directly south is determined as 7.15 s.

Explanation:

The time for the car to drive directly south is determined by applying the concept of slope.

slope = Δy/Δx

a = Δv/Δt

Δt = Δv/a

Δt = (26.8)/(3.75)

Δt = 7.15 s

Thus, the time for the car to drive directly south is determined as 7.15 s.