An object has a volume of 0.050 m3 and a weight of 400 N. You immerse the object in water (density 1000 kg/m%).
What is the buoyant force on the object and does the object sink or float?
A. The buoyant force is 100 N and the object floats.
B. The buoyant force is 50 N and the object floats
C. The buoyant force is 500 N and the object sinks.
D. The buoyant force is 500 N and the object floats.

Answer:

The net force on the object is zero

Explanation:

An object is moving with constant non-zero velocity. If velocity is constant, it means that the change in velocity is equal to 0. As a result, acceleration of the object is equal to 0. Net force is the product of mass and acceleration. Hence, the correct option is (d) "The net force on the object is zero".

The ship travels with a velocity of 15 km/h within 2 hours. The distance travelled is the velocity times the time taken that is 30 km to the north.

Velocity is a physical quantity measuring the distance travelled by an object per unit time. Velocity is the rate of speed and it is a vector quantity having both magnitude and direction. The unit of velocity can be m/s, km/h, ft/s etc.

Velocity is the ratio of the change in distance to the change in time. The change in distance is sometimes called the displacement.

then velocity  = displacement / time

Given that velocity = 15 km/h

time taken = 2 hours

then displacement = velocity × time

= 15 × 2 = 30 Km

Therefore, the displacement of the ship is 30 km to the north.

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Answer:

500

Explanation:

25/0.05

The weight of picture frame that is hanging by two vertical strings the tensions in the strings are 5.7N and 3.5N is 9.2 N

Since the picture frame is hanging and not moving,

a = 0

The string apply a force upwards and weight is a force that acts downwards.

T1 = 5.7 N

T2 = 3.5 N

∑ Fy = m a

T1 + T2 - W = 0

5.7 + 3.5 - W = 0

W = 9.2 N

Therefore, the weight of picture frame is 9.2 N

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The thing that happens when you push or pull a water tube is that the force makes the tube to speed up, slow down, or be in one place.

It is very hard when pulling  water and if a person need to consistently pull air out of the tube before water makes it to the pump, it is very  difficult and some pumps may or cannot do it.

In regards to pushing, when a person is pushing above the Center of Gravity, one is pushing the said object into the ground and thus is increasing the rate of friction.

If a person is pulling you are said to be pulling above the Center of Gravity and lowering friction.

So, The thing that happens when you push or pull a water tube is that the force makes the tube to speed up, slow down, or be in one place.

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Answer:

periscope, an optical instrument used in land and sea warfare, submarine navigation, and elsewhere to enable an observer to see his surroundings while remaining under cover, behind armor, or submerged.

Explanation:

Answer:

M = 4.5

Explanation:

He ran 3 meters, which is three meters. Then he ran back half of 3, which is 1.5 meters. 3 + 1.5 is 4.5

Answer:

The final velocity of her partner is approximately -1.04 m/s or 1.04 m/s in the opposite direction to her direction of motion

Explanation:

The given parameters are;

The mass of the man, m₁ = 65 kg

The mass of the woman, m₂ = 45 kg

Taking the relative initial velocity of the man and the woman as 0 m/s, we have;

The initial velocity of the man, v₁₁ = 0 m/s

The initial velocity of the man, v₁₂ = 0 m/s

The final velocity of the woman, v₂₂ = 1.5 m/s

The final velocity of the man = v₂₁

Therefore, we have, by the conservation of momentum principle;

The total initial momentum = The total final momentum

Which gives;

m₁ × v₁₁ + m₂ × v₁₂ = m₁ × v₂₁ + m₂ × v₂₂

Substituting the known values;

65 × 0 + 45 × 0 = 65 × v₂₁ + 45 × 1.5

∴ 65 × v₂₁ + 45 × 1.5 = 0

45 × 1.5 = - 65 × v₂₁

v₂₁ = 45 × 1.5/(-65) ≈ -1.04 m/s

The final velocity of the man, her partner = v₂₁ ≈ -1.04 m/s.

If the resistance remains constant and the voltage doubles, the power will increase by a factor of 4 (option E)

The following data were obtained from the question:

P = V² / R

Resistance is constant, we have

V₁² / P₁ = V₂² / P₂

V² / P = (2V)² / P₂

V² / P = 4V² / P₂

Cross multiply

V² × P₂ = P × 4V²

Divide both side by V²

P₂ = P × 4V² / V²

P₂ = P × 4

From the above, we can conclude that the power will increase by a factor of 4 (option E)

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The electric potential difference (ΔV) is equal to the voltage (V) and is found to be v. The work (W) is equal to × 10–18 J, rounded to one decimal place.

The electric potential difference, or voltage, is a measure of the difference in electric potential between two points in an electric field. In this case, the value of ΔV is given as v. It represents the potential energy difference per unit charge between the two points.

The work done (W) in an electrical system is equal to the product of the charge (q) and the potential difference (ΔV). In this context, the work is given as × 10–18 J, rounded to one decimal place. This value indicates the amount of energy transferred when a charge of magnitude 1.602 × 10–19 C moves across the electric potential difference.

It's important to note that the context and specific details of the problem are missing, which may affect the interpretation and calculation of the electric potential difference and work. Therefore, additional information is required to provide a more accurate and complete answer.

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Answer:

The KE will be multiplied by 9.

Explanation:

KE=1/2mv^2 so if velocity is tripled, KE will increase by a factor if 3^2, which is 9.

The speed of the wave on a string is given by Taylor's formula:

where

F = tension force

μ = linear density = mass per unit length

But also we can say the speed of any wave is given by:

where:

λ = wave length

f = frequency

Plug the second equation in the first one. We get:

Now solve for f:

Lets say wave length is the same on the second case. Since it's the same string μ will also be the same.

See that 340 N = 2 x 170, so we can write:

The statement that is not true about magnetic fields is d) a negative point charge moving through a magnetic field produced by a magnet can experience magnetic force due to this field. Since the charge of a negative point charge is negative, the direction of the magnetic force it experiences is opposite to that of a positive point charge moving with the same velocity in the same magnetic field.

This is because the magnetic force on a charged particle moving through a magnetic field is given by the equation F = qvB sinθ, where F is the magnetic force, q is the charge of the particle, v is its velocity, B is the magnetic field strength, and θ is the angle between the velocity of the particle and the direction of the magnetic field. Since the charge of a negative point charge is negative, the direction of the magnetic force it experiences is opposite to that of a positive point charge moving with the same velocity in the same magnetic field. Therefore, the correct statement would be that a negative point charge moving through a magnetic field produced by a magnet can experience a magnetic force due to this field, but the direction of the force would be opposite to that experienced by a positive point charge.

The other three statements are all true. A wire with current running through it produces a magnetic field in the space surrounding it due to the movement of charged particles in the wire. A magnet produces a magnetic field in the space surrounding it due to the alignment of the magnetic moments of the atoms or molecules in the magnet. And a charged particle moving through a magnetic field can experience a magnetic force due to the interaction between the magnetic field and the moving charge.

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Environmental energy is taken in at a rate of 745 kJ per second (E = +745 kJ).

The region of the universe in which observations are made is referred to as a thermodynamic system, while the rest of the universe is referred to as the surrounds. Everything but the system is present in the environment. Together, the system and its surrounds make up the cosmos. The system and the environment make up the cosmos.

We are aware that any tie must be broken with energy. As a result, energy from the environment will be absorbed to dissolve the acetone's CO bond. The double bond between the CO atoms in the acetone molecule has a dissociation energy of 745 kJ/mol at the moment. Therefore, Energy Change will be:

Environmental energy is taken in at a rate of 745 kJ per second (E = +745 kJ).

Potassium fluoride is the substance that the chemical formula KF stands for. After hydrogen fluoride, KF is the primary source of the fluoride ion for usage in industry and chemistry. It is a type of alkali halide known as carobbiite, an uncommon mineral.

Potassium fluoride, which is insoluble in water and is employed in oxygen-sensitive processes like metal production, is a source of potassium.

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Coulomb, unit of electric charge in the metre-kilogram-second-ampere system, the basis of the SI system of physical units. ... The coulomb is defined as the quantity of electricity transported in one second by a current of one ampere.

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Answer:

a)

Weight in Air = 0.3N

Weight in Water = 0.25N

Weight in Liquid = 0.24N.

Upthrust /Buoyant Force = Weight in Air – Weight in Fluid(Water in this case)

= 0.3 – 0.25

= 0.5N.

b) R.D of Body = Density of Body/Density of Standard Fluid(Water).

There's a Derived Formula for RD.

I'm gonna Apply it here.

Ask me for the derivation in the Comment section if you need it.

RD = α/ρ = (Weight in Air) / (Upthrust Force)

Where

α = density of the Body(or reference substance)

ρ = density of standard fluid (water)

= 0.3/0.05 = 6.

c) RD of Liquid = (Density of Liquid) /(Density of standard Fluid(water)

Or we just go by that formula

RD of Liquid = Weight in Air/Upthrust(In Liquid)

We'll be using the Upthrust in that Liquid now.

= 0.3 – 0.24 = 0.06

RD = 0.3/0.06 = 5.

You should push the accelerator all the way to the floor and hold for five seconds if your engine is flooded with gasoline.

To find the answer, we need to know about the flooded engine.

Thus, we can conclude that, You should push the accelerator all the way to the floor and hold for five seconds if your engine is flooded with gasoline.

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Answer:

Electromagnets are widely used as components of other electrical devices, such as motors, generators, electromechanical solenoids, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment.Explanation:

Answer:

Magnification of a mirror is given by:

m= -v/u where v is the image distance and u is the object distance.

Also, m=h/h° where h is the object height and h° is the image height.

Magnification of lens: m= v/u

The calculated value is 5.6 m. Much more frequently than sound intensities in watts per square meter, sound intensity levels are expressed in decibels (dB).

Both the scientific literature and the public media use decibels as their preferred measurement unit. The rationale behind this decision of units has to do with how we hear. Noise exposure is harmful to the hearing, and it is normal for musicians to suffer from hearing loss that is so severe that it affects their ability to play. Sound intensity, a term that applies to all noises, whether or not they are heard, is the pertinent physical quantity.

We are given Δp, so we can calculate I using the equation I=(Δp)22ρv . Using I , we can calculate β straight from its definition in β (dB)=10 log10(II0) β (dB)=10 log10(II0) .

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Answer:

If the driver is wearing a seat belt, the seat belt rather than the windshield applies the unbalanced force that stops the driver's forward motion. The force from the seat belt is applied over a longer time, so the force causes less damage.

Explanation:

20.74 W/m^2 is the intensity of an electromagnetic wave with a peak electric field strength of 125 v/m

Intensity is given by:

I = 0.5×c×e0×E^2

Using given values:

c = 3.0×10^8 m/sec

e0 = 8.85×10^-12

E = 125 V/m

I = 0.5×3×10^8×8.85×10^-12×125^2

I = 20.74 W/m^2

The Intensity of an electromagnetic wave per unit area (power is defined as energy per unit time), where the area is measured on a plane perpendicular to the direction of propagation, determines the intensity of the electromagnetic wave.

Larger surface areas are covered by the light energy as it travels farther between surfaces. The magnetic and electric fields may exert greater forces and hence have higher intensities the greater their size.

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Answer:

SOUND WAVES enter the ear canal and cause the eardrum to vibrate. VIBRATIONS pass through 3 connected bones in the middle ear. This motion SETS FLUID MOVING in the inner ear. ... In the brain, these impulses are CONVERTED into what we "hear" as sound.

Explanation:

I hope this help

When a body is positively charged, it implies that there is positive as well as negative charge in the body but the positive charge is more than negative charge.

Most of the materials that make up our world are composed of atoms, which are made up of a nucleus containing protons and neutrons surrounded by electrons. When an atom loses or gains electrons, it becomes positively or negatively charged, respectively. This is because the number of protons in an atom, which determines its atomic number and chemical properties, does not change.

When there are more protons than electrons, the atom becomes positively charged, and when there are more electrons than protons, it becomes negatively charged.Positive charge is the property of a material that has lost one or more electrons and therefore has more protons than electrons. Positive charges repel other positive charges, while negative charges attract positive charges.

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\(\huge{ \mathcal{  \underline{ Answer} \:  \:  ✓ }}\)

Given :

Solution :

\( \large\boxed{ \mathrm{volume = \pi {r}^{2}h }}\)

_____________________________

\(\mathrm{ \#TeeNForeveR}\)

Answer:

0.078 inches

Explanation:

Hopefully this was of use!

Answer:

see below

Explanation:

Gases flying out at high velocity out the back  

  rocket flying forward

Answer:B

Explanation:

The electric field between the two parallel conducting plates is 15,500 V/m.

To determine the electric field between the two parallel conducting plates, we can use the equation relating the electric field (E) to the energy (E) and charge (q) of the ion:

E = E / q

Energy of the ion (E) = 31 keV = 31,000 eV

Charge of the ion (q) = 2e (doubly charged ion)

Substituting the values into the equation, we have:

E = 31,000 eV / (2e)

Simplifying, we find:

E = 15,500 V

Therefore, the electric field between the two parallel conducting plates is 15,500 V/m.

Complete Question:

Determine the electric field between two parallel conducting plates separated by 2.00 cm if a doubly charged ion is accelerated to an energy of 31keV by this electric field.

- 1.9375 V/m

- 1.55×10⁶ V/m

- 3.1×10⁶ V/m

​- 0.62 V/m

- 1.29×10⁻⁶ V/m

- 1.55×10⁵ V/m

- 7.75×10⁵V/m

- 15.5 V/m

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Answer:

  T = (99.78 ±0.05) ºC

Explanation:

This problem refers to the procedure to perform the measurements and their correct reporting.

Suppose that the thermometer used has an appreciation of 0.1ºC and the values ​​of 5 measurements resulted in

 #     T (ºC)

 1      99.8

 2     99.7

 3     99.7

 4     99.8

 5     99.9

the processing calculate mean value

   T_average = ∑ \(T_{i}\) / n

   T_average = (99.8 + 99.7 + 99.7 + 99.8 + 99.9) / 5

   T_average = 99.78ºC

the absolute error or uncertainty of the measurement is half the appreciation of the instrument

       ΔT = ± 0.05ºC

so the result must be written

        T = (99.78 ±0.05) ºC