You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down.
a) Work is + on the way up and + on the way down
b) Work is + on the way up and - on the way down
c) Work is - on the way up and + on the way down
d) Work is - on the way up and - on the way down

When the mass is traveling toward x=+A at the equilibrium position (x=0), the maximum velocity occurs.

Velocity is defined as a vector expression representing the change in position over time of an object or particle. ​Acceleration is the rate at which the speed and direction of a moving object vary over time.

In simple harmonic motion, the acceleration is zero at the object's maximum speed. Maximum mass displacement in SHM equates to maximum acceleration. The momentum calculator uses the equation p=mv, or momentum (p) equals mass (m) times velocity (v).

Thus, when the mass is traveling toward x=+A at the equilibrium position (x=0), the maximum velocity occurs.

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Answer:

The mechanical advantage of the wheelbarrow is the product of the mechanical advantage of the lever, and the mechanical advantage of the wheel and axle. Therefore, the wheelbarrow has a mechanical advantage of 4.

hope this helps :D

Answer:

12.3°C should be the correct answer

Answer:

12.3

Explanation:

Answer:

I'M SORRY I CAN'T SEE THE PICTURE BUT IT WILL MOST LIKELY BE THE DIFFERENCE BETWEEN THE NUMBERS

Explanation:

for instance if there was someone pushing a desk with a net force of 9 towards the right, the net force would come to a total of 9 since there is no one on the other side pushing the desk. Meaning the desk would go right. I'm sorry if this isn't what you needed D:

Answer:.

They both rely on "reflected" sound waves.

Pluto's orbit is much more eccentric and inclined compared to the orbits of the eight major planets in the solar system. This means that Pluto's orbit is more elliptical and tilted relative to the plane of the solar system, while the orbits of the major planets are generally more circular and on the same plane.


First, Pluto's orbit is much more eccentric (elongated) than the orbits of the other planets. This means that its distance from the Sun varies more dramatically over the course of its orbit. While the other planets have nearly circular orbits, Pluto's orbit is more oval-shaped.

Second, Pluto's orbit is also more inclined (tilted) relative to the plane of the Solar System. The eight major planets all orbit in roughly the same plane, but Pluto's orbit is tilted at an angle of about 17 degrees. This means that it sometimes travels above and below the plane of the Solar System during its orbit.

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volume increases with decrease in pressure

Explanation:

pressure and volume are inversely proportional. if volume increases the,pressure decreases and vice versa ,where temperature is kept constant

Answer:

false

Explanation:

Answer:

, pfx = pix + Jx.

Explanation:

The momentum principle tells us that impulse transfers momentum to an object.

If an object has 2 kgm/s of momentum, a 1 kgm/s impulse delivered to the object

increases its momentum to 3 kgm/s. That is, pfx = pix + Jx.

Just as we did with energy, we can represent this “momentum accounting” with a

momentum bar chart. For example, the bar chart of FIGURE 11.6 represents the ball

colliding with a wall in Figure 11.4. Momentum bar charts are a tool for visualizing

an interaction

The magnitude of the force that particle b exerts on particle a is 0.86 N. To find the vector force, we need to determine the direction of the force. Since particle b is moving directly away from particle a, the force it exerts on particle a is in the opposite direction, i.e., to the left. Therefore, the vector force is -0.86 N in the x-direction.

Force is an interaction between two objects that occurs when one object exerts a push or pull on the other. Forces can cause objects to accelerate, decelerate, or change direction. In classical mechanics, the force is described by Newton's second law of motion, which states that the rate of change of momentum of an object is proportional to the applied force.

We can use Coulomb's Law to calculate the magnitude of the force between the two charged particles:

\(\mathrm{F = k \times q_1 \times q_2 / r^2}\)

where F is the force, k is the Coulomb constant, q1 and q2 are the charges of the particles, and r is the distance between them.

Let's assume that particle a has a positive charge and particle b has a negative charge. Then, we can write the following equation based on the information given:

\(\mathrm{2.38 N = k \times q_1 \times q_2 / (12.9 mm)^2}\)

We also know that the distance between the particles increases to 18.2 mm. Since particle b moves away from particle a, the direction of the force it exerts on particle a is opposite to the direction of the force that particle a exerts on particle b.

To calculate the magnitude of the force that particle b exerts on particle a, we can use the same equation and substitute the new distance:

\(\mathrm{F' = k \times q_1 \times q_2 / (18.2 mm)^2}\)

Since the charges q1 and q2 are the same, we can simplify the equation as follows:

F' = F × (12.9 mm / 18.2 mm)²

F' = 2.38 N × (0.709 mm / 1.0 mm)²

F' = 0.86 N

The magnitude of the force that particle b exerts on particle a is 0.86 N. To find the vector force, we need to determine the direction of the force. Since particle b is moving directly away from particle a, the force it exerts on particle a is in the opposite direction, i.e., to the left. Therefore, the vector force is -0.86 N in the x-direction.

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Answer:

B. raising the temperature of the air

Answer:

13.33 g/cm3

Explanation:

density = mass/volume

mass of irregular body = 800 grams

new volume = 60 cube cm

= density = 800/60  = 13.333 g/cm3

Answer:

18000

Explanation:

To multiply (6.0 x 10^-5) by (3.0 x 10^8), we can multiply 6 by 3 and then 10^-5 by 10^8.

Then

(6.0 x 10^-5)(3.0 x 10^8) = (6.0x3.0) x (10^-5 x 10^8)

(6.0 x 10^-5)(3.0 x 10^8) = 18 x 10^3

(6.0 x 10^-5)(3.0 x 10^8) = 18000

Therefore, the answer is 18000

The object that is best used to study the transformation between kinetic and potential energy is the clock because it has a pendulum.

A pendulum can be used to study the conversion of kinetic energy to potential energy. As the pendulum swings from side to side energy is converted from potential energy to kinetic energy and back to potential energy.

The potential energy is minimum and the kinetic energy is maximum at the middle of the pendulum. At both ends of the pendulum, the potential energy of the system is maximum.

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the voltage drop across the resistor r is 5R V.

Given that,

Current through the resistor, r = I = 5 A

Resistance of the resistor, r = R

Internal resistance of the battery, r = 1 Ω

Electromotive force (emf) of the battery = E = 10 V

By Kirchhoff’s law,

Voltage drop across R = I × R

= 5 × R V

Therefore, the voltage drop across the resistor r is 5R V.

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Answer:

24

Explanation:

Given parameters:

Load  = 7406N

Effort  = 308.6N

Unknown:

The mechanical advantage of the block and tackle system = ?

Solution:

Mechanical advantage is the ability of a simple machine to amplify or increase the force needed to do work.

  Mathematically;

     M.A = Output force / Input force

Output force  = Load

Input force  = Effort

     M.A = 7406N / 308.6N  = 24

The mechanical advantage is 24

The flow of electricity in a certain path is the circuit.

This equation shows that newtons/coulomb and volts/meter are equivalent, as both express the same physical quantity of electric field strength.

To begin, we can use the equation for electric field, which is given by:

E = F/Q

Where E is the electric field strength in newtons/coulomb, F is the force experienced by a test charge Q in newtons, and Q is the test charge in coulombs.

We can rewrite this equation as:

F = EQ

Now, we can use the definition of voltage, which is given by:

V = W/Q

Where V is the voltage in volts, W is the work done in joules, and Q is the charge in coulombs.

We can rearrange this equation as:

W = VQ

Now, we can substitute this expression for W into the equation for F:

F = EQ

F = EQ = (VQ)/d

Where d is the distance between the charges in meters.

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During the day, the radio primarily receives AM (Amplitude Modulation) stations from a nearby city due to the influence of various factors, including the behavior of radio waves and the Earth's atmosphere :

During the day, the ground wave propagation is more effective than the skywave propagation. The ground wave of AM stations from nearby cities is able to propagate relatively well and reach your location. However, the ground wave's range is limited due to absorption, reflection, and refraction caused by the temperature gradient in the lower atmosphere. At night, the absence of solar radiation on the ionosphere causes it to become more reflective. This leads to an increase in skywave propagation, enabling AM signals from more distant cities to bounce off the ionosphere and reach your location. The increased range allows you to pick up stations from the distant city that were previously beyond the reach of the ground wave during the day.

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Answer:

C

Explanation:

For the following:

The change in momentum of the body on striking the ground is equal to the initial momentum before firing vertically upward, which is p. Therefore, the answer is (b) p.

The temperature of a body depends upon the average kinetic energy of molecules. Therefore, the answer is (b) speed.

The distance moved by the force is equal to the product of the initial velocity ( V₀) and the time (1 sec) plus half the product of the force (F) and the square of the time (1 sec) divided by the mass (1 kg).

Therefore, the answer is (b) V₀ + F/2.

The total kinetic energy before the explosion is equal to the sum of the kinetic energies of the two pieces after the explosion.

Since the mass and velocity of one of the pieces, calculate its kinetic energy using the formula KE = (1/2)mv².

Therefore, the kinetic energy of the other mass is (b) 32J.

Foams and cotton clothes are used to absorb water because of their (c) capillary action. Capillary action refers to the ability of a substance to draw liquid into its small spaces or pores.

In a spectrum, red color is deviated to a lesser extent than all the other colors because its velocity is (b) less than all the other colors. The speed of light in a medium depends on the refractive index, which is different for different colors. Red light has a lower refractive index compared to other colors, causing it to be deviated to a lesser extent.

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The magnitude of the net force on the ball moving in a circular path with a constant speed of 5.0 m/s and a radius of 0.5 m is 25.0 N. The centripetal force acting on the ball keeps it moving in the curved path.

To determine the magnitude of the net force on the ball, we need to consider the centripetal force acting on the ball as it moves in a circular path. The centripetal force is responsible for keeping an object moving in a curved path.

In this case, the ball is moving with a constant speed of 5.0 m/s in a horizontal circle with a diameter of 1.0 m. The diameter of the circle is directly related to the radius, which is half the diameter. So, the radius of the circle is 0.5 m.

The centripetal force is given by the equation:

\(F_c = (m \times v^2) / r\)

where F_c is the centripetal force, m is the mass of the ball, v is the velocity of the ball, and r is the radius of the circular path.

Plugging in the given values:

\(F_c = (1.0 kg \times (5.0 m/s)^2) / 0.5\) m

\(F_c = 1.0 kg \times 25.0 m^2/s^2 / 0.5\) m

\(F_c = 25.0 kg m/s^2\)

The magnitude of the net force on the ball is 25.0 N.

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We need to round up to the nearest whole number, which gives us a total of 4 circuits required for the lighting in the residential unit. Hence, Number of circuits is 3.75 circuits

Number of 120 volt / 15 amp general lighting circuits required for a residential unit, we need to calculate the total wattage of the lighting fixtures in the unit.

Assuming that the unit has a standard ceiling height of 8 feet, the total area of the unit is:

75 ft x 60 ft = 4,500 square feet

For total wattage, we can use a standard lighting power density of 1.5 watts per square foot for residential units. Therefore, the total wattage required for lighting in the unit is:

4,500 sq ft x 1.5 watts/sq ft = 6,750 watts

To determine the number of 120 volt / 15 amp circuits required, we need to convert the wattage to amperes using the formula:

Amps = Watts / Volts

For a 120 volt circuit, the amperage would be:

Amps = 6,750 watts / 120 volts = 56.25 amps

Since a 15 amp circuit is the most common standard circuit breaker size for lighting circuits, we can divide the total amperage required by 15 to determine the number of circuits needed:

Number of circuits = 56.25 amps / 15 amps = 3.75 circuits

We cannot have fractional circuits, so we need to round up to the nearest whole number, which gives us a total of 4 circuits required for the lighting in the residential unit.

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The number of distinct values of resistance that can be made is five. So, option D. is correct.

1. Let's represent the resistance of each identical resistor as R.
2. Consider the possible combinations:
  a. No resistor connected:

This case doesn't contribute to a resistance value.
  b. One resistor connected:

The resistance value is R.
  c. Two resistors connected in series:

The resistance value is R + R = 2R.
  d. Two resistors connected in parallel:

The resistance value is (R * R) / (R + R) = R/2.
  e. Three resistors connected in series:

The resistance value is R + R + R = 3R.
  f. Three resistors connected in parallel:

The resistance value is (R * R * R) / (R * R + R * R + R * R) = R/3.
  g. One resistor in parallel with two resistors in series:

The resistance value is (R * (R + R)) / (R + (R + R)) = (2 * R) / 3.

3. Count the distinct resistance values: R, 2R, R/2, 3R, R/3, and (2 * R) / 3, which sums to a total of 5 different resistance values.

So, the correct answer is five distinct values of resistance can be made using three identical resistors in any combination. So, option D. is correct.

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Answer: 1000 Hz

Explanation:

You can calculate frequency by dividing velocity by wavelength

Frequency = velocity/wavelength

Find velocity first.

900 m/3 s = 300 m/s

Plug values in to find frequency.

F = (300 m/s)/0.3 m

F = 1000 Hz

Answer:

diffraction

Explanation:

took da test

Answer:

This has 5 significant figures.

The maximum distance a wave varies from its rest position is called the amplitude of the wave.

The amplitude represents the maximum displacement or distance from equilibrium that a particle or medium experiences as the wave passes through it.In a transverse wave, such as a wave on a string or an electromagnetic wave, the amplitude is measured as the maximum displacement of the particles in the medium perpendicular to the direction of wave propagation. For example, in an ocean wave, the amplitude would be the maximum height of the wave crest above the average water level.

In a longitudinal wave, such as a sound wave, the amplitude is measured as the maximum displacement of particles in the medium parallel to the direction of wave propagation. For example, in a sound wave, the amplitude would be the maximum compression or rarefaction of air particles from their equilibrium position.

The amplitude of a wave determines its energy and intensity. Higher amplitudes generally correspond to waves with greater energy and intensity. Amplitude also affects the perception of the wave, such as the volume of a sound wave or the brightness of a light wave.

It's important to note that the amplitude is a measure of the wave's displacement and should not be confused with wavelength, which is the distance between two corresponding points on the wave (e.g., crest to crest or compression to compression).

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