Which of the following statements about buoyant force is true?


A: Objects with a larger density float in fluids with a smaller density.


B: Objects with a smaller density float in fluids with a larger density.


C: Density does not determine whether or not an object will float.


D: Objects float in liquids with equal densities.

If half of the sun's mass were to suddenly disappear, the gravitational force exerted by the sun on the planets, including Earth, would decrease.

This would cause the Earth's orbit to change, as it would no longer be held in its current position by the same gravitational force. The exact nature of this change would depend on a variety of factors, including the velocity and direction of the Earth at the time of the mass loss, and the gravitational influences of other bodies in the solar system.

However, it is likely that the Earth's orbit would become more elliptical, meaning that it would be less circular and more stretched out. This could potentially have significant implications for the Earth's climate and seasons, as well as for the stability of the entire solar system.

If half of the Sun's mass were to suddenly disappear, Earth's orbit would be affected significantly. The gravitational force between the Earth and the Sun, which keeps Earth in its orbit, would be reduced. As a result, Earth's orbital path would likely become more elliptical, causing increased variations in temperature and climate. Additionally, the Earth could potentially move further away from the Sun, leading to a colder average temperature on the planet.

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Answer:

The  distance traveled by the ball before it lands in the other player's glove is 130.96 m.

Explanation:

Given;

angle of projection of the ball, θ = 40⁰

initial velocity of the ball, u = 36.1 m/s

The distance traveled by the ball before it lands in the other player's glove is the range of the projectile, calculated as follows;

\(R = \frac{u^2 sin(2\theta)}{g} \\\\R= \frac{36.1^2 \times sin(2\times 40)}{9.8} \\\\R = \frac{36.1^2 \times sin(80)}{9.8} \\\\R = 130.96 \ m\)

Therefore, the  distance traveled by the ball before it lands in the other player's glove is 130.96 m.

Answer:

the weight of the astronaut on Earth is 1209.88 N

Explanation:

Given;

weight of the astronaut, W = 200 N

acceleration due to gravity on moon, g = 1.62 m/s²

Apply Newton's second law of motion to determine the mass of the astronaut;

F = ma = mg

m = F/g

m = 200 / 1.62

m = 123.457 kg

The weight of the astronaut on Earth is calculated as follows;

F = mg

where;

g is acceleration due to gravity on Earth = 9.8 m/s²

F = 123.457 x 9.8

F = 1209.88 N

Therefore, the weight of the astronaut on Earth is 1209.88 N

The effective spring constant is approximately 249 N/m of the musculature attached to the eyeball.

The natural frequency of a spring-mass system can be calculated using the following formula:

f = (1/2π)×√(k/m)

Where f is the frequency, k is the effective spring constant, m is the mass attached to the frequency.

Since we know the natural frequency of the eyeball in its socket, f = 29 Hz, and the mass of the eyeball, m = 7.5 g = 0.0075 kg, we can rearrange the formula to solve for the spring constant:

k = (f × 2π)²×m

k = (29 × 2π)² × 0.0075

k = 249 N/m

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The time it takes for the ball to roll the length of the track will not be affected by the presence of a dip in the track. The ball's motion on a frictionless horizontal track is solely determined by its initial velocity, and as long as there are no additional forces acting parallel to the direction of motion, the time to complete the track will remain unchanged.

If the ball rolls along a frictionless horizontal track, its motion is determined solely by its initial velocity. The presence of a dip in the track will not affect the time it takes for the ball to roll the length of the track.

This is because the dip in the track does not introduce any forces acting parallel to the direction of motion. Therefore, the ball will maintain its initial velocity throughout the entire length of the track, and the time it takes to roll the track will remain the same.

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Answer:

because they are underaged and prob dont care and also the gov thinks that the youth cant make a reasonable decision for them selves for sum like that and the media influnces them to by saying whats going on and who supports who

The orbit radius is 6.225 × 10^5 km.

The x-ray pulses from Cygnus X-1, a celestial x-ray source, have been recorded during high-altitude rocket flights. The signals can be interpreted as originating when a blob of ionized matter orbits a black hole with a period of 7.84 ms. And also, it is given that the blob were in a circular orbit about a black hole whose mass is 13.5 times the mass of the Sun. We need to determine the orbit radius.

The formula to be used to find the orbit radius is given by:

G(M+m)T2/4π2= r3

Where,

G = Gravitational constant = 6.67259×10−11 N⋅m2/kg2
M = Mass of the black hole
m = Mass of the blob
T = Time period of the orbit = 7.84 ms = 7.84 × 10^-3 s
r = Orbit radius

Substitute the given values in the above formula, we get:

r3 = G(M+m)T2/4π2
r3 = 6.67259×10−11 * [13.5(1.991×10^30) + m] * (7.84×10−3)2 / 4π2
r3 = 5.7919 × 10^15 m^3
Taking cube root on both sides, we get:
r = [5.7919 × 10^15 m^3] 1/3
r = 6.225 × 10^8 m
1 km = 1000 m

Therefore, the orbit radius in km is:
r = 6.225 × 10^8 m * 1 km / 1000 m
r = 6.225 × 10^5 km

Hence, the orbit radius is 6.225 × 10^5 km.

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Answer:

Density = 1027.3 [kg/m3]

Explanation:

To solve this problem we must use the concept of density which is defined as the relationship between mass and volume, which can be determined by the following equation.

density = m/v

m = mass = 308.19 [gramm] = 0.30819 [kg]

v = volume = 300 [mL] = 0.3 [Lt] = 0.0003 [m3]

density = (0.30819/0.0003)

density = 1027.3 [kg/m3]

Answer:

I believe D

Explanation:

Of course the manufacturer would most likely be biased to the product the have created, but the other sources would have no reason to. Hope this helps!

Answer:

When you put un-like poles together (South facing North) you can feel magnetic attraction. In the Northern Hemisphere, your compass needle points North, but if you think about it for a moment, you will discover that the magnetic pole in the Earth's Northern Hemisphere has to be a South polarity.

The initial velocity of the train is 20m/s when the train decelerates uniformly at a rate of 2m/s2. It means that initially, at time = 0 seconds, the train was moving with a velocity of 20m/s.

We know that,

v = u +at

where, v = final velocity

u = initial velocity

a = acceleration

t = time taken

In this case, as the train is decelerating we will use a negative sign with acceleration.

Substituting the values we get,

v = u + (-2)(10)

v will be equal to zero, as the train comes to a stop.

0 = u - 20

u = 20 m/s

Hence, the initial velocity of the train is 20m/s when the train decelerates uniformly at a rate of 2m/s2 and comes to a stop in 10 seconds.

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Answer:

The last one

Explanation:

The cat goes from the tree branch (top) to the ground (bottom)

The functioning of a radio obeys the energy conservation principle, the energy is conserved throughout the process of transmitting sound waves.

Radio is a device that receives and broadcasts electromagnetic waves in the radio frequency (RF) range. The energy conservation principle states that energy can neither be created nor destroyed, but it can be converted from one form to another. This principle applies to the functioning of a radio, where the energy is conserved throughout the process.

When a radio receives a signal, it converts the electromagnetic wave energy into an electrical signal using an antenna. The electrical signal is then amplified and demodulated to extract the original audio signal. The audio signal is then amplified again and played through a speaker, where the electrical energy is converted into sound energy. The energy that was originally present in the electromagnetic wave is conserved throughout this process and is not lost.

Similarly, when a radio broadcasts a signal, the audio signal is first converted into an electrical signal, which is then amplified and used to modulate an RF carrier wave. The modulated RF wave is then transmitted through an antenna as electromagnetic waves. The electrical energy from the audio signal is conserved and transformed into electromagnetic energy in the transmitted signal.

In both cases, the energy conservation principle is applied, and the energy is conserved throughout the process. Therefore, the functioning of a radio obeys the energy conservation principle.

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Answer:

The Kinetic energy Possessed by the hammer gets converted into heat energy when it strikes the piece of iron

According to the information we can infer that the travel angle is called a "drag" angle.

In welding terminology, the travel angle refers to the angle between the axis of the electrode and the workpiece surface. When the top of the electrode leads the welding end (meaning the electrode is inclined downward at an angle) and the welding arc is pointing back toward the weld bead, it is known as a "drag" angle.

In this configuration, the electrode is dragged along the surface of the workpiece, creating a trailing arc direction. This technique is commonly used in certain welding processes, such as shielded metal arc welding (SMAW) or stick welding, to control the heat input and the direction of the molten metal flow during the welding operation.

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Step1). We would first try to balance C and O because it is present in compound form on RHS.

Step2). After that we will balance H

Answer:

In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory.

Explanation:

Answer:

A. a baseball flying through the air at 90 miles per hour

Explanation:

Kinetic Energy is the energy of mass in motion

Answer:

Asteroids and comets have a few things in common. They are both celestial bodies orbiting our Sun, and they both can have unusual orbits, sometimes straying close to Earth or the other planets. They are both “leftovers” — made from materials from the formation of our Solar System 4.5 billion years ago. But there are a few notable differences between these two objects, as well. The biggest difference between comets and asteroids, however, is what they are made of.

While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds. When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.

Right now, the majority of asteroids reside in the asteroid belt, a region between the orbits of Mars and Jupiter which may hold millions of space rocks of varying sizes. On the other hand, the majority of comets are in the farthest reaches of our Solar System: either 1. in the Kuiper Belt — a region just outside the orbit of the dwarf planet Pluto that may have millions of icy comets (as well as many icy dwarf planets like Pluto and Eris); or 2. the Oort Cloud, a region where trillions of comets may circle the Sun at huge distances of up to 20 trillion kilometers (13 trillion miles).

Answer:

they are both leftovers materials

Explanation:

think about how the solar system is made the comets and asteroids are both rocks and remains of the solar system

Answer:

False, Sunspots appear dark (in visible light) due to their low temperature(cooler) than rest of the sun

Explanation:

Sunspots appear dark because they are much cooler( have low temperature than the rest of the surface contained by Sun. As they appear dark, but still they have very temperature that's why so hot. Sunspots have temperatures ranges  3,500 Celsius (3773 kelvin) and the surrounding surface of the sun has a temperature much higher of about 5,500 Celsius(5773 Kelvin). Even if we see a sunspot alone in space,  it will glow so brightly.

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Answer:

D, -8 F

Explanation:

This specific thermometer is in increments of two degrees per minor line and 10 per thicker line. Since the thermometer is showing below zero, the answer cannot be A or B since they are positive. -4 Cannot be the answer since the line addition does not make sense for that. It would be -4 if the thick line increments were 5 degrees instead of ten. Therefore if you count the lines by two from zero down to the thermometer line, you would get -8 Degrees F

Explanation:

we know that

v = m/d

or; v=1kg/800kgm^3

or; v=0. 00125m

Answer:

i) Power = Force * Velocity = 1100 * 15 = 16500 W = 16.5 kW(ii)  Find the value of k first: F = 400 + k(15^2)                                              k = 28/9    F = 400 +(28/9)(30^2) = 320

Explanation:

Answer:

The charge on each end of the wire produces what we call an electric field. The electric field makes negative electrons want to travel towards the positive end of the wire (the end with not enough electrons).

the answer is d because it's going to positive.

is am alright? let me know.

The magnitude of the car's momentum (p) in SI units is 965.88 kg·m/s.

To calculate the momentum, we need to convert the mass of the car from pounds (lb) to kilograms (kg) and the velocity from miles per hour (mph) to meters per second (m/s).

Converting the mass of the car, 2141.00 lb, to kilograms, we use the conversion factor 1 lb = 0.453592 kg. Thus, the mass of the car is 2141.00 lb * 0.453592 kg/lb = 971.34 kg.

Converting the velocity, 49.00 mph, to meters per second, we use the conversion factor 1 mph = 0.44704 m/s. Therefore, the velocity of the car is 49.00 mph * 0.44704 m/s/mph = 21.89 m/s.

The momentum is calculated by multiplying the mass and velocity: p = mass * velocity = 971.34 kg * 21.89 m/s = 21277.9826 kg·m/s. Rounding to the appropriate number of significant figures, the magnitude of the car's momentum is 965.88 kg·m/s.

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Answer:

See below

Explanation:

A ) distance = 1/2 a t^2    <==== when starting from rest

          20    = 1/2 (a) (3.5^2)      shows a = 3.27 m/s^2

B)   Velocity(at 3.5 s)   =   a t   = 3.27 * 3.5 = 11.42 m/s

C)    3.5 seconds      +    80 m / 11.42 m/s = 10.5 s

Answer:

ANSWER IS A CONVECTION

B CONDUCTION

Point A heat transfer as steam is type of a convection heat transfer

Point B a source is the type of conduction heat transfer

Conduction = It is a process of heat transfer in which energy is transferred between successive molecules For example If we put the one end of the spoon to the boiling water then other end also become hot due to conduction.

Convection = It is type of heat transfer in which the heat flows due to movement of molecules or convection currents. convection heat transfer takes place in water and gases.

Just like this at point B the heat is transferred from one molecule to other which is conduction.

And point A heat transferred from steam which is convection as explained in above definition.

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Answer:

I’m so sorry I tried solving it but I don’t understand it can you explain the question a little bit more ty

Explanation:

The correct answer is: The proton has more mass and the larger orbit, so it takes longer to complete one orbit.

The time taken to complete one orbit (also known as the period) in a magnetic field depends on the mass of the particle and the radius of its orbit. The period of a charged particle in a magnetic field is given by the equation:

T = 2πm / (qB)

Where:

T = Period of the orbit

m = Mass of the particle

q = Charge of the particle

B = Magnetic field strength

Since both the electron and the proton are moving at the same speed and experience the same magnetic field, the radius of their orbits will be different due to the difference in their masses. The proton has a greater mass than the electron, and therefore, it will have a larger orbit.

As the period of an orbit is inversely proportional to the radius, a larger orbit will result in a longer period.

Therefore, the proton, with its larger orbit, will take more time to complete one orbit compared to the electron.

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