Jovan starts at his house. He, then, walks 5.0 miles to a store eastward. He then walks to his grandma’s house 3.0 miles west from the store. What is Jovan's distance?

2.0 miles
3.0 miles
5.0 miles
8.0 miles

The statement that is not correct is (c) the relative motion between an observer and a star does not change the observed frequency of light from the star.

This statement is incorrect because the relative motion between an observer and a star does affect the observed frequency of light from the star. This effect is known as the Doppler shift, which causes the observed frequency of light to shift towards the blue end of the spectrum when the star is moving towards the observer, and towards the red end of the spectrum when the star is moving away from the observer. This effect can be used to detect exoplanets using the Doppler-shift method. the relative motion between an observer and a star does not change the observed frequency of light from the star.
Both statement (a) and (b) are correct. The Doppler-shift effect can be used to detect exoplanets, by measuring the small changes in the star's radial velocity caused by the gravitational tug of the orbiting planet. Imaging can also provide direct evidence for the existence of exoplanets, by observing the faint light emitted by the planet itself or by the reflection of the star's light off the planet's atmosphere.
Statement (d) is also correct. Imaging exoplanets is better in infrared wavelengths than in visible wavelengths because most exoplanets emit more radiation at longer wavelengths due to their lower temperatures. Also, infrared light is less affected by scattering and absorption in the Earth's atmosphere, which makes it easier to detect faint signals from distant exoplanets.

learn more about relative here

https://brainly.com/question/19260269

#SPJ11

Answer:

Kinetic energy is best described as the energy of motion.

Explanation:

Just a cheerful teen willing to help,

wishing you a splendiferous rest of the day,

stay salty...

Kinetic energy is best described by the energy of motion. The correct option is option (A).

The kinetic energy is described as,

Kinetic energy = 1/2*mass*velocity²

The kinetic energy is the energy that acts when an object is in motion. It is characterized as the work necessary to move an object from a state of rest to its present velocity. From the equation, the square of the velocity and mass is directly proportional to the kinetic energy. The kinetic energy is a scalar quantity and its SI unit is joules.

Hence, the correct option is (A).

To learn more about Kinetic energy, here:

https://brainly.com/question/999862

#SPJ6

Answer:

Area = 54

Explanation:

6 × 9 = 54

you just need to multiple the two different sized sides

Answer: 8

Explanation: 200/25=8

The nfl caliber wide receiver that can reach a top speed of 10.0 m/s in only 2.4 s has an acceleration during this time of: 4.16 m/s²

The formula and procedure we will use to solve this exercise is:

a = (vf - vi) /t

Where:

Information about the problem:

Applying the acceleration formula we have:

a = (vf - vi) /t

a = (10.0 m/s - 0 m/s) /2.4 s

a = (10.0 m/s) /2.4 s

a = 4.16 m/s²

It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2

Learn more about acceleration at: brainly.com/question/14344386

#SPJ4

To find the period of revolution for a planet moving around the Sun along an elliptical orbit, we can use Kepler's Third Law of Planetary Motion, which states that the square of the orbital period (T) is proportional to the cube of the semi-major axis (a) of the elliptical orbit.

T² = (4π² / GM) * a³

Where:

T is the period of revolution

G is the gravitational constant (approximately 6.674 × 10^(-11) m³/(kg·s²))

M is the mass of the Sun

a is the semi-major axis of the elliptical orbit

In this case, the minimum distance of the planet to the Sun is given by r1, which corresponds to the semi-minor axis (b) of the elliptical orbit. The maximum distance of the planet to the Sun is given by r2, which corresponds to the semi-major axis (a) of the elliptical orbit.

Since the semi-major axis (a) is the average of the semi-minor axis (b) and semi-major axis (c), we can calculate a using the formula:

a = (r1 + r2) / 2

Now, we can substitute the value of a into the equation for the period of revolution:

T² = (4π² / GM) * [(r1 + r2) / 2]³

Taking the square root of both sides, we get:

T = √[(4π² / GM) * [(r1 + r2) / 2]³

Therefore, the period of revolution of the planet around the Sun is given by the equation:

T = √[(4π² / GM) * [(r1 + r2) / 2]³]

To learn more about Law of Planetary Motion follow:

https://brainly.com/question/12813684

#SPJ11

Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

Answer:

A) the liquid particals move slower

Explanation:

vapor has a higher temp and have more energy than liquid so it's not c or d. and liquid has a lower boiling point than vapor

Given:

The mass on the table is,

The hanging mass is,

THe coefficient of friction is,

let the acceleration of the whole system is a (for the hanging mass it is downward and for the mass on the table it is rightward). the tension towards The fixed point of the pulley is T.

we can write,

Adding these equations we get,

Substituting the values we get,

Hence the acceleration is 6.66 m/s^2.

Projectile motion is a combination of horizontal and vertical types of motion.

Projectile motion is a form of motion experienced by an object or particle that is projected near Earth's surface and moves along a curved path under the action of gravity only. Objects experiencing this motion have a constant velocity in the horizontal direction, and a constantly changing velocity in the vertical direction. Types of Projectile Motion are Oblique projectile motion, Horizontal projectile motion and Projectile motion on an inclined plane.

Therefore, third option is the correct answer.

To learn more about Projectile motion, refer here :

https://brainly.com/question/3159582

#SPJ2

An optical system's focal length, which is the inverse of a system's optical power, indicates how strongly a system converges and diverges light. A system with a good focal length is said to converge light.

The focal length of the a mirror (or lenses) is the separation between its pole and focal point. It can also be measured as the distance between its optical centre and pole. A point where a parallel light ray is "focused" after reflection inside the mirror is known as the central focus (F) of a mirror.

In photography, focal length—which is a completely different characteristic of a lens—is mentioned much more frequently than focal distance. While not entirely dependent on it, focal length and focal distance are connected. This is what? The focal distance measures how far the object you are focused is from the camera sensor.

To know more about power visit:

https://brainly.com/question/31260332

#SPJ1

Answer: 5.25cm,virtual

Explanation:

Answer:

In order to minimize the uncertainty in the period, we measured the time for the pendulum to make 20 oscillations, and divided that time by 20

Explanation:

Answer:

16.44 N

Explanation:

From the diagram attached,

we make use of cosine rule to calculate the resultant force

R² = P²+Q²-2PQcosα............................. Equation 1

Where R = resultant force

Given: P = 7 Newton, Q = 10 Newton, α = (180-30) = 150°

Substitute these values into equation 1

R² = 7²+10²-(2×7×10×cos150°)

R² = 49+100-140cos150°

R² = 149-140cos150°

R² = 149-140(-0.8660)

R² = 149+121.24

R² = 270.24

R = √(270.24)

R = 16.44 N

Richard C. Carrington is the astronomer who first detected the presence of a wind of particles coming from the Sun.

Astronomers first detected the presence of a wind of particles coming from the Sun by noting the wind's direction in the tail of the comet. Early astronomers used to rely on normal eyes for observing such bodies. They studied the surface of the Sun by studying the different wavelengths of light reflected from the surface of the Sun to the corona of the eyes. By studying the effect of wind on the tail of the comet, the presence of a wind of particles that comes from the Sun can be detected. This was studied through an experiment carried out by Richard C. Carrington.

For further learning about comets, refer to the link: https://brainly.com/question/28543341

#SPJ4

Answer:

It is always constant unlike weight

Answer:

232 N

Explanation:

By Hooke's law, the force applied to a spring is proportional to the stretch of the spring, so

F = kx

Where F is the force, k is the spring constant and x is how much it is stretched.

So, replacing k by 58N/cm and x by 4 cm, we get

F = (58 N/cm)(4 cm)

F = 232 N

Therefore, the force applied is 232 N

The distance of the test charge from the source charge is 1.1 m. Option A is correct.

It states that the electric flux across any closed surface is directly proportional to the net electric charge enclosed by the surface.\(R= \sqrt \dfrac {Qk^}E\)

Where,

\(E\) = electric force = 3. 93 × 10⁵  N/C

\(k\) = Coulomb constant = \(8.99 \times 10^9 \rm\ N m ^2 /C ^2\)

\(Q\\ \)     = charges =  5.0 µC

\(r\) = distance of separation =?

Put the values in the formula,

\(R= \sqrt \dfrac {5\times 10^{-6}8.99 \times 10^9}{3. 93 \times 10^5}}\\\\ R = 1.1 \rm \ m\)

Therefore, the distance of the test charge from the source charge is 1.1 m.

Learn more about Gauss's law:

https://brainly.com/question/1249602

Answer:

the great size or extent of something

Explanation:

Answer:

The absolute size,extent or importance of something.

Answer:

20-30 degree

Explanation:

the milky is around 20_30 degrees thick in the cygnus region when overhead on a decent night

Explanation:

A parallel circuit is often called a current divider for its ability to proportion—or divide—the total current into fractional parts. Once again, it should be apparent that the current through each resistor is related to its resistance, given that the voltage across all resistors is the same

We've put together a step-by-step explanation of how people hear—from the moment sound waves arrive to the outer ear, then travel through the middle and inner ear and transform into meaningful signals sent on to the brain. Our brain uses these signals to organize and communicate with the external world.

One would need to define a few terms in order to categorize substances as minerals, mineral simulants, or non-minerals.

She attempted to grin by baring her teeth. She attempted to maintain some sense of discipline in the gathering. There isn't even a hint of realism in the movie. He lost all sense of dignity and ran after her down the street.

Prosaic things are boring and uninteresting. [formal] His teacher provided a more pragmatic justification for the increase in interest. Synonyms: uninteresting, commonplace, routine more words for prosaic.

To know more about Simulant visit:

https://brainly.com/question/16359096

#SPJ4

Answer:

mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons).

In this case the mass number would be 11.

Answer: 11

Explanation: mass number of an element = protons+neutron

Given that a 3.0 kg object is moving with an acceleration of 2.7 m/s² in the positive direction of the y-axis and The magnitude of the other force is determined to be 0.6 N.

To find the magnitude of the other force acting on the object, we need to use Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration, \(F = ma\).

In this case, the net force acting on the object is the vector sum of the two forces. Let's denote the force acting in the positive direction of the x-axis as Fx and the force acting in the positive direction of the y-axis as Fy.

Given that the mass of the object (m) is 3.0 kg and the acceleration (a) is 2.7 m/s², we can calculate the net force as \(F = ma\).

Since the net force is the vector sum of Fx and Fy, we can write the equation as √(Fx² + Fy²) = ma.

We are given that Fx = 8.4 N, and we need to find the magnitude of Fy. Substituting the given values into the equation, we get √(8.4² + Fy²) = (3.0 kg)(2.7 m/s²).

Solving this equation, we find that Fy² = (3.0 kg)(2.7 m/s²)² - 8.4². Taking the square root of both sides, we find Fy ≈ 0.6 N.

Therefore, the magnitude of the other force acting on the object is approximately 0.6 N.

Learn more about force here

https://brainly.com/question/28995600

#SPJ11

The molar mass of the gas with specified density and pressure at certain temperature is calculated to be 64.02 mol⁻¹.

Given,

ρ = 2.09 g/l

T = 100° C

P = 1 atm

Molar mass (Mm) can be written as the ratio of given mass of the gas (m) and number of moles (n) it contains.

Mm = m / n ---(1)

Density can be written as the ratio of mass and volume.

ρ = m / V ---(2)

Placing (1) and (2) in ideal gas law equation, we have

P V = n R T

"P V = m / Mm × R T"

Making Mm as subject, we have,

Mm = m / V × R T/P

Convert the temperature of the gas from degrees Celsius to Kelvin then substituting the values,

Mm = m / V × R T/P

Mm = 2.09 g/l × 0.0821 atm L/mol K× (100 + 273.15)K × 1/ 1 atm = 64.02 mol⁻¹

To know more about molar mass:

https://brainly.com/question/1486415

#SPJ4

Energy released ,

\( = 3.789 \times {10}^{ - 12} \) J

The cross-sectional area of the carrier wa 24000-kg fighter airplane lands on the deck of the aircraft carrier, the carrier sinks 0.27 cm deeper into the water and the density of seawater is 1025 kg/m³ is 9.9 × 10³ m².

To determine the cross-sectional area of the aircraft carrier, we can use the formula for buoyant force, which states that the buoyant force is equal to the weight of the displaced water. In this case, the weight of the displaced water is equal to the weight of the airplane, which is 24,000 kg.

First, we need to calculate the volume of the displaced water. Since the carrier sinks 0.27 cm deeper, we can convert this to meters (0.27 cm = 0.0027 m) and multiply it by the cross-sectional area (A) to get the volume (V) of the displaced water:

V = A × 0.0027 m

Next, we use the formula for buoyant force, which is:

Buoyant force = weight of displaced water = density × volume × gravity

We are given the density of seawater (1025 kg/m³) and the weight of the airplane (24,000 kg × 9.81 m/s² = 235,440 N). Plugging these values into the formula, we get:

235,440 N = 1025 kg/m³ × A × 0.0027 m × 9.81 m/s²

Now, we can solve for the cross-sectional area (A):

A = 235,440 N / (1025 kg/m³ × 0.0027 m × 9.81 m/s²) ≈ 9.9 × 10³ m²

So, the cross-sectional area of the carrier is approximately 9.9 × 10³ m², or 9.9 × 10³ square meters to two significant figures.

To learn more about cross-sectional area, click here: https://brainly.com/question/28579482

#SPJ11

Answer:

you need to consider the use for the product, how brittle the materials are, how they react to certain things, the cost of the materials, the durability and flexibility of the materials, and how easy to obtain the materials are as well as how they would work and how they would hold

Answer:

11.6 seconds

Explanation:

8.25/0.711=11.6