8.98 dm3 of hydrogen gas
is collected at 38.8 °C. Find
the volume the gas will occupy
at -39.9 °C if the pressure
remains constant.

The torque produced by the baseball caught by the first baseman is 22.35 N·m.

To calculate the torque, we need to find the angular acceleration of the baseball. First, we convert the velocity from mph to m/s: 90 mph = 40.23 m/s. Then, we calculate the angular acceleration using the formula: angular acceleration = final angular velocity / time. The final angular velocity is 0, as the ball comes to rest, and the time is 0.01 seconds. Thus, the angular acceleration is 0 rad/s^2. The torque can be calculated using the formula: torque = moment of inertia × angular acceleration. Since the baseball is treated as a point mass, the moment of inertia is I = m × r^2, where m is the mass of the baseball and r is the distance from the axis of rotation (approximated as the height of the first baseman, 2m). Plugging in the values, we get torque = 0.25 kg × (2m)^2 × 0 rad/s^2 = 1 N·m. Therefore, the torque produced by the baseball is 22.35 N·m.

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Therefore, we cannot calculate the exact time for one cycle without more information.

The time for one cycle of a planet around the Sun is determined by its orbital period, which is related to the average distance of the planet from the Sun. In this case, if the average distance of the planet from the Sun is 21 astronomical units (A.U.), we can use Kepler's Third Law to calculate the orbital period.

Kepler's Third Law states that the square of the orbital period (T) is proportional to the cube of the average distance (r) between the planet and the Sun. Mathematically, it can be expressed as:

T^2 = k * r^3

Where k is a constant.

Given that the average distance is 21 A.U., we can set up the following equation:

T^2 = k * 21^3

To solve for T, we need the value of the constant k. However, without further information or additional equations, we cannot determine the specific value of k. Therefore, we cannot calculate the exact time for one cycle without more information.

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Answer:

it is the

Explanation:

The object that experiences the reaction force to force A is the racket itself, which experiences an equal and opposite force from the ball. So, the correct answer is (Choice C) - The racket.

When Vincenzo swings his racket and hits the tennis ball, his racket exerts force A on the ball. According to Newton's Third Law of Motion, the ball exerts an equal and opposite force back on the racket. This is called the reaction force. Therefore, the object that experiences the reaction force to force A is the racket itself.

The reaction force is equal in magnitude and opposite in direction to force A, as per Newton's Third Law. This phenomenon is true for every action and reaction pair, where the two forces act on different objects. In this case, force A acts on the ball, and the reaction force acts on the racket.

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The resistance of the electric heating element can be determined using Ohm's law, which states that resistance (R) is equal to voltage (V) divided by current (I). In this case, the voltage across the element is given as 232 volts and the current flowing through it is 19 amperes. The correct option is 12 ohms.

Applying Ohm's law, we calculate the resistance as:

R = V / I

R = 232 volts / 19 amperes

R ≈ 12 ohms

Therefore, the resistance of the element is approximately 12 ohms. This means that for every ampere of current flowing through the element, there is a voltage drop of 12 volts. The resistance value of 12 ohms indicates that the element has a moderate level of electrical resistance, which allows it to generate heat efficiently when current flows through it. Thus, the correct option is 12 ohms.

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The change in gravitational potential energy (∆UG) of 1.0 kg of water is 245 Joules and 255,102 kg of water must pass through the turbines each second to generate 50 MW of electricity in a hydroelectric dam with 80% efficiency.

(a) To calculate the change in potential energy (∆Ug) of 1.0 kg of water, we can use the formula:

∆Ug = m * g * ∆h

Where:

m = mass of water = 1.0 kg

g = acceleration due to gravity ≈ 9.8 m/s²

∆h = change in height = 25 m

Substituting the values into the formula, we have:

∆Ug = 1.0 kg * 9.8 m/s² * 25 m

∆Ug = 245 Joules

Therefore, the change in potential energy of 1.0 kg of water falling 25 m is 245 Joules.

(b) We are given that the dam is 80% efficient at converting potential energy to electrical energy. This means that only 80% of the potential energy of the water is converted into electrical energy.

The power output (P) of the hydroelectric dam is given as 50 MW (megawatts), which is equal to 50 * 10^6 Watts.

The potential energy converted to electrical energy per second can be calculated using the formula:

P = ∆Ug * η * f

Where:

P = power output = 50 * 10^6 Watts

∆Ug = change in potential energy per kilogram of water = 245 Joules (from part a)

η = efficiency of the dam = 0.80 (80%)

f = flow rate of water (in kg/s)

Rearranging the formula to solve for the flow rate (f), we get:

f = P / (∆Ug * η)

Substituting the values, we have:

f = (50 * 10^6 Watts) / (245 Joules * 0.80)

f ≈ 255,102.04 kg/s

Therefore, approximately 255,102 kg of water must pass through the turbines each second to generate 50 MW of electricity in a hydroelectric dam with 80% efficiency.

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The following assertions are accurate when two particles of different masses are projected at the same projection angle and beginning velocity:

Different particle trajectories will be followed by the particles: A projectile's trajectory is determined by its beginning velocity, projection angle, and gravitational acceleration. Due to the various masses of the two particles, their gravitational forces and accelerations will be different, and as a result, so will their trajectories.

Several heights will be attained by the particles: A projectile's maximum height is influenced by its starting velocity and projection angle. The two particles will ascend to different heights since they have different masses but the same beginning velocity.

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Answer:

c. nuclear fusión oh A. alpha decay

The time period resulting in oscillations will be 1.986 seconds.

The period is the amount of time it takes for a particle to perform one full oscillation. T is the symbol for it. Taking the reciprocal of the frequency yields the frequency of the oscillation.

The time period of the oscillation is;

\(\rm T = 2 \pi\sqrt{\frac{L}{g}} \\\\ \rm T = 2 \times 3.14 \times \sqrt{ \frac{98.2 \ \times 10^{-2} \ m}{9.81 \ m/s^2}} \\\\ T= 1.986 \ sec\)

Hence the time period resulting oscillations will be 1.986 seconds.

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Answer:

Explanation:

If the question is set up correctly here, we can solve this correctly.

Lightning and Thunder Data

Occurrence Lightning

Observed Thunder Heard Distance to ---- We need this

Lightning (m)

A 8:00:00 p.m. 8:00:01 p.m. 330

B 5:30:00 p.m. 5:30:04 p.m. 1,320

C 6:45:00 p.m. 6:45:06 p.m. 1,980 ---- We need this

D 7:20:00 p.m. 7:21:00 p.m. 19,800

6:45:06 - 6:45:00 = 6

So 6 seconds. We also get 1980. So we do 1980/6, which is 330(m)?

If the unit is meters, then the sound of thunder travels at 330(m)

Explanation:

Rock A was formed from small pieces of rock, which indicate a formation of a sedimentary rock, considering that those types of rocks are formed this way.

Rock B, however, was formed by liquid rock, which is another term for magma. Igneous rock is formed when magma cools down.

This concludes that the two rocks are different types.

Answer:

Some object have less gravitational pull than other objects.

Explanation:

Performance behaviour is the total set of work-related behaviors that the organization expects the individual to display.

What are Performance behaviors?

Performance behavior refers to the establishment of a quantifiable link between the desired outcome and the behavior needed to get there. It identifies and quantifies the behavior required to produce the intended outcome.

What are examples of performance behaviors?

In addition to Interpersonal abilities, Customer Service Orientation, includes:

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Explanation:

\(\mathrm{A\ capacitor\ works\ on\ the\ principle\ that\ the\ capacitance\ of\ a \ conductor\ shows}\\\mathrm{\ increase\ when\ an\ earthed\ conductor\ is\ brought\ near\ it.}\\\mathrm{Hence,\ a\ capacitor\ has\ two\ plates\ separated\ by\ a \ distance\ having\ equal\ and}\\\mathrm{opposite\ charges.}\)

a) The distance of closest approach is2.00 mm

b) The magnitude of the magnetic force that the proton exerts on the electron: 1.60 × 10⁻¹⁹ N

a) To find the distance of closest approach between the proton and electron, we need to determine the y-coordinate of the electron when it is at x = 0.

Given that the electron is moving along the line x = +4.00 mm, at the instant of closest approach, the y-coordinate of the electron will be equal to the negative of its x-coordinate.

Therefore, the distance of closest approach is 4.00 mm or 2.00 mm (taking the absolute value).

b) The magnetic force between two moving charges can be calculated using the formula
F = (|q₁| * |q₂| * v * B) / r,
where F is the force,
|q₁| and |q₂| are the magnitudes of the charges,
v is the velocity of the charge,
B is the magnetic field, and
r is the distance between the charges.

In this case, the proton and electron have equal magnitudes of charge |q₁| = |q₂| = 1.60 × 10⁻¹⁹ C, and they are moving with the same speed v = 4.20 × 10⁵ m/s. The magnetic force depends on the magnetic field B, which is not given in the question.

Therefore, we cannot calculate the exact magnitude of the magnetic force without knowing the value of the magnetic field.

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Answer:

d

Explanation:

Answer:

Explanation:

An object begins from rest and accelerates at a rate of 2.5 meters ... at a rate of +1.6 meters per second' while traveling +5.0 ... Calculate the block's rate of acceleration. 4. Vf² V, ²+2 ad. (12 m/s)?-(Omis) + 2(a)(50m) ... represents the motion of a car during a 6.0 second time interval. ... A cat moves 15 meters east in 5 seconds.

Answer:

vibrates, and they carry energy from one place to another. Look at the sound wave and the water wave. vibrating electric charges and can travel through space where matter is not present. to particle, electromagnetic waves travel by transferring energy between vibrating electric and magnetic fields.

Answer: positive

Explanation: because opposites attract and north=positive and south=negative the answer should be positive.

The polarity of the red tip of the compass needle must be at the north of the earth, since it points toward the south pole of the magnet.

Polarity of a magnet is defined as the orientation of both the north and south poles of the magnet in space.

Here,

We know that, the opposite poles attract.

The magnetic needle is arranged in a such a way that, the red tip of the magnetic compass needle is actually pointing towards the geographic north pole of the earth.

In order to point the compass needle towards the magnetic south pole, the south pole of the magnet must be located in the geographic north pole.

Hence,

The polarity of the red tip of the compass needle must be at the north of the earth, since it points toward the south pole of the magnet.

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Answer:

300 Hz.

Explanation:

The frequency of a sound wave is the same as that of the source. For example, a tuning fork vibrating at a given frequency would produce sound waves that oscillate at the same frequency.

The frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

Frequency is a measurement of how often a repetitive event occurs in a given amount of time. It is commonly used to describe the rate at which waves oscillate or vibrate. The unit of frequency is hertz (Hz), which represents the number of cycles or oscillations per second.

For example, in the case of sound waves, frequency is related to the pitch of the sound. Higher frequency sound waves have a higher pitch, while lower frequency sound waves have a lower pitch. Similarly, in the case of electromagnetic waves such as light, frequency is related to the color of the light. Higher frequency electromagnetic waves correspond to colors such as blue and violet, while lower frequency electromagnetic waves correspond to colors such as red and orange.

The relationship between frequency, wavelength, and the speed of the wave is given by the formula:

frequency = speed of the wave / wavelength

This formula shows that the frequency of a wave is inversely proportional to its wavelength, assuming the speed of the wave remains constant. In other words, as the wavelength of a wave increases, its frequency decreases, and vice versa.

Frequency is an important concept in many fields, including physics, engineering, and communications. It is used to describe and analyze a wide range of phenomena, from the behavior of sound and light waves to the performance of electronic circuits and systems.

Here in the Question,

When a tuning fork is struck against a table, it vibrates at its natural frequency, which is determined by its physical properties such as its mass, shape, and material. The vibration of the tuning fork creates sound waves that travel through the air, and our ears perceive these waves as sound.

The frequency of the sound that we hear depends on the frequency of the sound waves that reach our ears. When the sound waves from the tuning fork travel through the air, they undergo a phenomenon called the Doppler effect, which causes the frequency of the sound waves to change depending on the relative motion between the source of the sound waves (the tuning fork) and the observer (our ears).

If the tuning fork is stuck against a table and is not moving relative to the observer, the frequency of the sound waves that reach our ears will be the same as the natural frequency of the tuning fork, which is given as 300 Hz in this case.

Therefore, the frequency that you will hear when the tuning fork is stuck against a table is 300 Hz.

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Answer:

in electric lamp

Electric Energy to Heat and Light Energy

Explanation:

Answer:

Ex: an electric fan transforms electric energy to kinetic energy

Or

Chemical energy to heat and light energy

Explanation:

Hope this helps

Answer:

5 KG of ice would have the lowest thermal energy

Answer:

its A; 5 kg of ice

Explanation:

yurrrr

Answer:

85.2ml

Explanation:

The height of the balloon above the ground is 80 ft.

To determine the height of the balloon above the ground, we can use the concept of similar triangles.

Let's consider the triangle formed by the height of the balloon, the distance between the wires, and the distance from each wire to the point where the balloon is tethered.

Given:

Distance between the wires: a = 80 ft

Let's denote the height of the balloon as h and the distance from each wire to the tethering point as x.

By considering similar triangles, we can set up the following proportion:

h / x = (h + a) / (2x)

Cross-multiplying and simplifying, we have:

h(2x) = x(h + a)

2hx = hx + ax

hx = ax

x = a

Therefore, the distance from each wire to the tethering point (x) is equal to the distance between the wires (a).

Since the balloon is tethered at a height equal to the distance between the wires, we can conclude that the height of the balloon above the ground is also equal to the distance between the wires.

Therefore, the height of the balloon above the ground is 80 ft

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A ball is attached to a string as shown below. If the ball is moving downwards and speeding up, The tension force acting on the ball (FT) is less than the force of gravity (Fg).

When the ball is moving downwards and speeding up, we can infer that the net force acting on it is directed downward and is greater than just the force of gravity. According to Newton's second law of motion (Fnet = ma), this net force is responsible for the acceleration of the ball.

The only force acting in the downward direction is the force of gravity (Fg = mg), where m is the mass of the ball and g is the acceleration due to gravity. Therefore, the net force (Fnet) is the difference between the force of gravity and the tension force (FT) exerted by the string.

Since the ball is accelerating downwards, the magnitude of the net force must be greater than the force of gravity, and thus FT < Fg.

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Answer:

The different layers of carbon atoms present in graphite are bounded by weak van der Waals forces. ... The cleaning between the layers is done by graphite, thus, it is so slippery and soft. This is the reason why graphite is used in pencil and as lubricants in machines which operate at high temperature.

grahite is used in pencils because its so oily and it also forms quickly so it best sometimes

Answer:

Option: 3 Speed √

is the right answer

Answer:

6.67 ohm

Explanation:

From the question given above, the following data were obtained:

Resistor 1 (R₁) =20 ohm

Resistor 2 (R₂) = 20 ohm

Resistor 3 (R₃) = 20 ohm

Equivalent Resistance (R) =?

Since the resistors are arranged in parallel connection, the equivalent resistance can be obtained as follow:

1/R = 1/R₁ + 1/R₂ + 1/R₃

1/R = 1/20 + 1/20 + 1/20

1/R = (1 + 1 + 1) / 20

1/R = 3/20

Invert

R = 20/3

R = 6.67 ohm

Therefore, the equivalent resistance is 6.67 ohm.

Answer:

8.8875km/h

Explanation:

t=32s=2/225h

d=79m=0.079km

s=d/t

s=0.079÷2/225