The graph below shows the speed of a car as it drives along a racetrack.





a. When does the car have the highest velocity?

Answer:

Answer:

72.936 Joule

Explanation:

Mechanical Energy = Potential Energy + Kinetic Energy

Kinetic Energy = (1/2) x m x V² = (1/2) x 1.8 x 4.8² = 20.736 J

Potential Energy = m x g x h = 1.8 x 10 x 2.9 = 52.2 J

Total Mechanical Energy = 20.736 + 52.2 = 72.936 Joule

Explanation:

Henrietta Leavitt was an astronomer who discovered that RR Lyrae stars pulsate at a regular rate that is directly related to their intrinsic brightness. This relationship, known as the period-luminosity relation, allowed Leavitt to measure the distances to many stars in our Milky Way galaxy and beyond. Her work revolutionized our understanding of the size and structure of the universe and paved the way for future astronomical discoveries.

Why do RR Lyrae stars pulsate?

RR Lyrae stars pulse like Cepheid variables, but the nature and histories of these stars is thought to be rather different. Like all variables on the Cepheid fluctuation strip, pulsations are caused by the κ-mechanism, when the ambiguity of ionized helium varies with its temperature.

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Answer:

\(\tau=5.81\times 10^5p\ N-m\)

Explanation:

We have,

Electric field, \(E=6.19\times 10^5\ N/C\)

The electric dipole vector at an angle of 69.9 degrees from the direction of the field.

The torque acting on a molecule is given by :

\(\tau=p\times E\\\\\tau=pE\sin\theta\)

p is electric dipole moment

\(\tau=p\times 6.19\times 10^{5}\times \sin (69.9)\\\\\tau=5.81\times 10^5p\ N-m\)

So, the magnitude of the torque acting on the molecule is \(5.81\times 10^5p\ N-m\).

A longitudinal wave makes up the second wave. The two waves will have traveled the same distance after 10 seconds since they are both longitudinal waves. Option a is Correct.

In the graphic below, an earthquake wave is depicted: An earthquake's second wave simultaneously emerges from the epicenter. They are in particular to blame for the terrible noises that follow powerful earthquakes. These waves move along the path of wave travel at a speed of around 5 miles per second, causing the crustal rock to shake.

These waves in a solid medium might either be longitudinal waves or transverse waves. P waves (for "principal" waves) denote longitudinal or compressional seismic waves through bulk material, whereas S waves denote transverse seismic waves ("secondary" ). Option a is Correct.

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Correct Question:

A wave produced by an earthquake appears in the diagram below:

A second wave leaves the center of an earthquake at the same time. The second wave is a longitudinal wave. After 10 seconds, will the two waves travel the same distance?

answer choices

a. Yes, because both waves are longitudinal waves.

b. Yes, because all waves travel at the same speed in similar mediums.

c. No, because only one type of wave can travel through a medium at a time.

d. No, because transverse waves travel at different speeds than longitudinal waves.

Explanation:

using Charles law; since the pressure is constant

V1/T1 = V2/T2

5/300 = V2/350

cross multiply

V2 X 300 = 5 X 350

V2 = 1750/300

V2 = 5.833L

To find the force that the electromagnetic wave exerts on the surface in pico-Newtons,

1. Convert the intensity and area into SI units:
Intensity (I) = 8 W/m^2
Area (A) = 51 cm^2 = 51 * 10^-4 m^2

2. Calculate the energy absorbed per second by the surface:
Energy per second (E) = Intensity * Area = 8 W/m^2 * 51 * 10^-4 m^2 = 0.408 W

3. Find the momentum transferred per second to the surface:
Momentum per second (p) = Energy per second / speed of light (c)
p = 0.408 W / (3 * 10^8 m/s) = 1.36 * 10^-9 kg m/s

4. Calculate the force exerted on the surface:
Force (F) = Momentum per second / time
Since momentum is transferred per second, the force will be equal to the momentum per second.
F = 1.36 * 10^-9 N

5. Convert the force into pico-Newtons:
Force (F) = 1.36 * 10^-9 N * (10^12 pN/N) = 1360 pN

So the force that the wave exerts on the surface is approximately 1360 pico-Newtons.

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The acceleration of gravity on Mercury is approximately 3.7 meters per second squared (m/s^2). This value is determined by the mass of Mercury and the distance between its center of mass and the surface of the planet. Because Mercury is smaller and less massive than Earth, the force of gravity on its surface is weaker, leading to a lower acceleration of gravity.

Yes, it is possible for a fig with a mass of 0.04 kg to have a greater momentum than an elephant seal with a mass of 3,000 kg.

The sum of an object's mass and velocity is termed as its momentum. It consists of both a magnitude and a direction, making it a vector quantity.



For the given momentum K.E. is inversely proportional to the mass. Hence, the fig with a mass of 0.04 kg has lower kinetic energy. For two bodies having same kinetic energy, the lighter one has greater momentum.

Hence, Yes, it is possible for a fig with a mass of 0.04 kg to have a greater momentum than an elephant seal with a mass of 3,000 kg.

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Answer:

hope it helps......

Explanation:

Pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid.

The distance from the central bright fringe to the 3rd dark fringe is approximately 0.48 cm.

Solution

The distance between the central bright fringe and the 3rd dark fringe in a double-slit experiment is given by:

y = (m * λ * L) / d

If y denotes the distance between the edges,

m is the fringe order (an integer value representing the number of bright or dark fringes away from the central fringe),

λ is the wavelength of the light,

L is the length between the two slits.

The distance between the two slits is given by d.

Substituting the given values, we get:

y = (3 * 600 nm * 150 cm) / 3.55 μm

y = 4800 nm

Converting nanometers to centimeters, we get:

y = 4800 nm * (1 cm / 10^7 nm)

y = 0.48 cm

Therefore, the distance from the central bright fringe to the 3rd dark fringe is approximately 0.48 cm.

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To convert the ideal-gas equation to relate Ppsig, Vft³, nlb-mole, and T°F and the total amount of gas is calculated by converting the moles of CO and N to lb-mole and to estimate the temperature needed to increase the gas pressure to 3000 psig, Convert the obtained temperature in K to °F.

The equation relating P (psig), V (ft³), n (lb-mole), and T* (°F) is:

P = 14.7 * P(atm), V = 28.3168 * V(L), n

= 2.20462 * n(mol), and T*

= (9/5) * T(K) - 459.67 and to calculate the total amount of gas in lb-mole, multiply the number of moles of CO by its molar mass and convert to lb-mole and to estimate the temperature in °F required to increase the gas pressure to 3000 psig.

(a) To convert the equation, we need to apply the following conversions:
- To convert P from atm to psig, multiply by 14.7 (since 1 atm = 14.7 psig).
- To convert V from liters to ft³, multiply by 28.3168 (since 1 liter = 0.0353 ft³).
- To convert n from mol to lb-mole, multiply by 2.20462 (since 1 mol = 2.20462 lb-mole).
- To convert T from K to °F, use the conversion formula:

T* = (9/5) * T(K) - 459.67.

(b) To calculate the total amount of gas in lb-mole, multiply the number of moles of CO by its molar mass (using the periodic table) and convert to lb-mole by multiplying by the molar mass of CO (28.01 lb/lb-mol). To calculate the mass of CO in lb, multiply the number of moles of CO by its molar mass (28.01 g/mol) and convert to lb by dividing by 453.59237 g/lb.

(c) To estimate the temperature in °F required to increase the gas pressure to 3000 psig, rearrange the ideal gas equation to solve for T*. Substitute the known values: P = 3000 psig (pressure limit), V = 3.5 ft³ (volume), n = 30.0 mole (number of moles), and solve for T*. Note that this estimate may not be accurate at high pressures.

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Answer:

a on edge

Explanation:

Explanation:

As the Earth orbits the Sun, the tilt causes one hemisphere and then the other to receive more direct sunlight and to have longer days. The total energy received each day at the top of the atmosphere depends on latitude

Answer:

She is right!

Have a good day/Night!

Explanation:

Rex

Answer:

16 m

Explanation:

Given:

v₀ = 4 m/s

a = 4 m/s²

t = 2 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (4 m/s) (2 s) + ½ (4 m/s²) (2 s)²

Δx = 16 m

I hope that the attachment helps you..

The (W/L) ratio of the pMOS to nMOS transistors for an ideal symmetric inverter is (A./B. Hy/C. I D. 2).

Answer: D. 29. If the inverter delay is 100 ps, the frequency of a 25-stage ring oscillator can be calculated by using the formula below:

R.O. Frequency = 1 / (2 * n * t), where n is the number of stages and t is the inverter delay.

Substituting the given values into the equation: R.O. Frequency = 1 / (2 * 25 * 100 ps)R.O.

Frequency = 200 MHzTherefore, the frequency of a 25-stage ring oscillator with an inverter delay of 100 ps is 200 MHz.

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Answer:

30 meters/day.

Explanation:

Glacial motion can be fast up to 30 meters/day or slow up to 0.5 m/year on small glaciers moving the impact on local landforms. If the glacial motion goes up to 30 meters/day, more fast change occurs in the local landforms while on the other hand, if the glacial motion goes up to 0.5 m/year, very slow change occurs in the local landforms. So glacial motion has a direct affect on the changes occurs in the local landforms.

Answer:

At 23.5 deg north of the equator this person would see the sun directly overhead at the summer solstice at noon

Answer:

2 more neutrons

Explanation:

To obtain the answer to the question, let us calculate the number of neutrons in carbon–14 and standard carbon (i.e carbon–12). This can be obtained as follow:

For carbon–14:

Mass number = 14

Proton number = 6

Neutron number =?

Mass number = Proton + Neutron

14 = 6 + Neutron

Collect like terms

14 – 6 = Neutron

8 = Neutron

Neutron number = 8

For carbon–12:

Mass number = 12

Proton number = 6

Neutron number =?

Mass number = Proton + Neutron

12 = 6 + Neutron

Collect like terms

12 – 6 = Neutron

6 = Neutron

Neutron number = 6

SUMMARY:

Neutron number of carbon–14 = 8

Neutron number of carbon–12 = 6

Finally, we shall determine the difference in the neutron number. This can be obtained as follow:

Neutron number of carbon–14 = 8

Neutron number of carbon–12 = 6

Difference =?

Difference = (Neutron number of carbon–14) – (Neutron number of carbon–12)

Difference = 8 – 6

Difference = 2

Therefore, carbon–14 has 2 more neutrons than standard carbon (i.e carbon–12)

Answer:

512

Explanation:

Given sequence:

        1/8, 1/2, 2, ...

Unknown:

The 7th term of the geometric sequence  = ?

Solution:

To solve this problem, we apply the formula below;

       Sₙ   = arⁿ⁻¹

a is the first term

r is the common ratio

n is the nth term

  r  = \(\frac{\frac{1}{2} }{\frac{1}{8} }\)    = \(\frac{1}{2} x 8\)   = 4

Input the parameters and solve;

      Sₙ  = \(\frac{1}{8}\) x 4⁷⁻¹

     Sₙ   = \(\frac{1}{8}\) x 4⁶  = 512

Answer:

The speed at which a planet orbits the Sun changes depending upon how far it is from the Sun. When a planet is closer to the Sun the Sun’s gravitational pull is stronger, so the planet moves faster. When a planet is further away from the sun the Sun’s gravitational pull is weaker, so the planet moves slower in its orbit.

Answer: the first one is speed

the second one is acceleration

the last is velocity

Explanation:

i got you

By definition, Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.

Weight is called the action exerted by the force of gravity on the body.

The mass (amount of matter that a body contains) of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.

The formula that allows you to calculate the weight of any body is:

P = m×g

where:

Then, the weight of an object is the force of gravity on the object, that is, the weight will vary according to the force of gravity that acts on it. So the correct answer is:

Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.

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Answer:

the warm air rises, cools and condenses to form clouds

Your hand feels colder when it transitions from warm to "colder" (room temperature) water.

Your hand feels colder when you move it from the warm water to the "colder" (room temperature) water. Skin surface temperature will decrease in a constant ambient environment as a result of sympathetic nerve activity increasing and blood flow decreasing as a result of cutaneous receptors triggered by ice-water immersion of one hand in the palm skin of the non-immersed opposite hand.

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Answer: The first one

Explanation:

Answer:

OA. . review all safety procedures and the lab activity procedure

Explanation:

Answer:

what grade is this?

Explanation:

Answer:

is it cumpulsary to know how fast the car was moving or it dosn't have to deal with velocity

Explanation:

:)

The positions to be considered are the position of the acorn and the earth.

The potential energy is the energy that is possessed by a body by virtue of its position. Hence, the potential energy of a body changes as its position changes.

Hence, to determine how the potential energy of the acorn changes in relation to the earth, the positions to be considered are the position of the acorn and the earth.

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