a motor lifts a mass m a height of 13 m in a time of 5.2 s. if the power output of the motor is 187 w, what is the mass in kg?

The only option II, increasing the mass, would increase the period of the oscillation.

The period of oscillation is defined as the time required for a single oscillation to occur. It is determined by the square root of the mass attached to the spring divided by the spring constant.

The formula for the period is:

T = 2π√m/k

Where T is the period, m is the mass, and k is the spring constant. Therefore, an increase in mass or a decrease in spring constant k would lead to an increase in the period of the oscillation. Only option II would result in an increase in the period of the oscillation.

The period of oscillation is a function of the mass of the object and the spring constant. If the mass is increased, the period of oscillation increases, and if the spring constant is increased, the period of oscillation decreases. It is also unaffected by the amplitude or air resistance. Thus, only option II, increasing the mass, would increase the period of the oscillation.

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so the resulting force of all the 3 forces is 11.7 N.

As shown in the figure below ther is 3 forces \(F_1 ,F_2 ,F_3\) are the forces so that the diagram is along the directions given in the question

so \(F_1\) = 3 j^ ( where j^ is unit vector along y axis)

\(F_2\) = 6 cos 45  i^ + 6 sin 45 j^ ( where i^ is unit vector along x axis)

\(F_3\)  = - 5 sin 30 i^ + 5 cos 30 j^

so the resultant force = \(F_1+ F_2 +F_3\)

=> 3 j^ + 4.24 i^ + 4.24 j^ + 4.33 j^ - 2.5 i^

=> 1.74 i^ + 11.57 j^

so resultant force = \(\sqrt{1.74^2 + 11.57^2}\)

=> \(\sqrt{136.89}\)

=> 11.7 N

so the resulting force of all the 3 forces is 11.7 N

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When two or more resistors are connected in series to a battery: options (B) and (C) - the equivalent resistance of the combination is equal to the sum of the resistances of each resistor. Also, the total voltage across the combination is the algebraic sum of the voltages across the individual resistors.

Hence, option (b) and option (c) are correct answers. For instance, consider two resistors of resistances R1 and R2 connected in series to a battery of emf E as shown below: In the above circuit, the same current flows through each resistor because the circuit is connected in series.

Let I be the current that flows through the circuit. Since the circuit is in series, the same current flows through R1 and R2. Hence, we can write that the voltage across R1, V1 = IR1, and the voltage across R2, V2 = IR2.

Then the total voltage across the combination is the sum of the voltages across each resistor, which is given by V = V1 + V2 = IR1 + IR2 = I(R1 + R2). Thus the equivalent resistance of the combination is the sum of the resistances of each resistor, which is given by Req = R1 + R2.

Hence option (b) is correct. The voltage across the combination is given by V = IR, where R = R1 + R2. Hence option (c) is also correct. Therefore, the correct answer is (b) and (c).

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Answer:

the correct answer is reflection

Answer:

diversion

Explanation:

when light rays spread apart after passing through a lens we call it diversion.

this type of lens is called diverging lens (concave lens)

Hope it helps

The speed of the rock as it hits the ground is 9.81t = 9.81 x 1.549 = 15.18 m/s and The time the rock is in freefall is 1.549 seconds.

Given Data:

Height of the balcony, h = 11.8 m

Initial speed of rock, u = 8.15 m/s

We know that for free fall motion, v = u + g*t

Where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity and t is the time of free fall.

Now, we know the initial velocity, but we need to find the time and final velocity.

Let's find the final velocity of the rock as it hits the ground.

To find the final velocity, we need to know the acceleration of the rock due to gravity.

The acceleration due to gravity is constant, and its value is 9.81 m/s².

Now, we can find the final velocity:v = u + g*tv = 8.15 + (9.81 * t)v = 8.15 + 9.81t

At the highest point, the velocity of the rock will be zero.

Therefore, the final velocity at the ground will be:v = 0 + 9.81t = 9.81t

We know that the height of the balcony, h = 11.8 m

Using the second equation of motion,s = ut + (1/2)gt²

Where s is the distance traveled, u is the initial velocity, g is the acceleration due to gravity and t is the time taken to reach the ground.

We need to solve this equation for time.t = √[2s/g]t = √[(2 × 11.8)/9.81]t = √[2.4012]t = 1.549 s

Therefore, the time the rock is in freefall is 1.549 seconds.

Answer:

(a) The speed of the rock as it hits the ground is 9.81t = 9.81 x 1.549 = 15.18 m/s

(b) The time the rock is in freefall is 1.549 seconds.

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Answer:

3.485e+6 inches. hope this helps

Answer:

What I got was a big number but it got around 3.485e+6

Explanation:

Answer

As per Columbo's law force is inversely proportional to square of distance between two charges.

\(\frac{F}{F_{new}} =\frac{r_{new}^{2} }{r^{2} }\)

\(\frac{F}{F_{new}} =\frac{(2r)^{2} }{r^{2} } \\\)

\(F = 4 F_{new}\)

therefore the new force if 1/4 times the old one

Answer:Boiling

Explanation: If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapour as it gets warmer.

Answer:

Most aircraft that leave trails aren't leaving smoke. It's condensed water vapour; essentially, clouds. These are called contrails. This can be caused by the water in the engine exhaust condensing, or by the disruption of the air by the passage of the aircraft triggering the condensation of water that was already present. Some aerobatic aircraft have smoke generators which leave much thicker and more visible trails which can be turned on and off and don't depend on particular atmospheric conditions. White is most common but other colours are possible.

The resulting charge on both capacitors must be the same since they are connected in series. We can use the formula Q = CV, where Q is the charge, C is the capacitance, and V is the potential difference.

Let Q1 be the charge on the 15-μF capacitor and Q2 be the charge on the 30-μF capacitor. Then, we have:

Q1 = C1V = (15 × 10^-6 F) × (50 V) = 0.75 mC
Q2 = C2V = (30 × 10^-6 F) × (50 V) = 1.5 mC

Since the total charge is the same, we can set Q1 + Q2 = QT, where QT is the total charge. Solving for Q2, we get:

Q2 = QT - Q1 = (0.75 mC) + (1.5 mC) = 2.25 mC - 0.75 mC = 1.5 mC

Therefore, the resulting charge on the 30-μF capacitor is 1.5 mC, which is equivalent to 0.50 mC (option 3) when rounded to two significant figures.

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If there are two other objectives that can be used with magnifications of 100 and 400, then the total magnifications that are possible will depend on the combination of the objectives used.

To calculate the total magnification, we need to multiply the magnification of the objective lens by the magnification of the eyepiece lens. Assuming the eyepiece lens has a magnification of 10x (which is standard), you can find the total magnifications for the 100x and 400x objectives as follows:

- For the 100x objective: 100x (objective) * 10x (eyepiece) = 1000x total magnification
- For the 400x objective: 400x (objective) * 10x (eyepiece) = 4000x total magnification

Therefore, if we use the 100x objective lens with the 10x eyepiece lens, the total magnification will be 1000x. Similarly, if we use the 400x objective lens with the 10x eyepiece lens, the total magnification will be 4000x. It's important to note that the total magnification also depends on the quality of the lenses and the microscope itself.

So, the other total magnifications possible are 1000x and 4000x.

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When an object is placed 45 cm in front of a converging lens with a focal length of 20 cm, a real and inverted image is formed on the other side of the lens. To draw a ray diagram, we can draw two rays starting from the top of the object, one parallel to the principal axis that refracts through the focal point on the other side of the lens and another ray that goes through the center of the lens and refracts without bending. The two refracted rays intersect at a point on the other side of the lens, which is the location of the image.

Using the lens equation, we can estimate the image distance to be 12 cm. The image is smaller than the object since the magnification is less than one. The image is real, inverted, and located beyond the focal point. The characteristics of the image depend on the position of the object relative to the lens.
To answer your question about an object placed 45 cm in front of a converging lens with a focal length of 20 cm, we will first estimate the image distance and then give the image characteristics. Unfortunately, I cannot draw a ray diagram, but I can guide you through the process.

1. Use the lens formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance.
2. Substitute the given values: 1/20 = 1/45 + 1/di.
3. Solve for di: 1/di = 1/20 - 1/45, which gives di = 36 cm.

The image distance is approximately 36 cm.

To find the image characteristics, determine the magnification:
1. Calculate magnification (m) using the formula m = -di/do.
2. Substitute the values: m = -36/45 = -0.8.

Since the magnification is negative, the image is inverted. Since the absolute value of magnification is less than 1 (0.8), the image is reduced in size. Additionally, as the image distance is positive, the image is real.

In conclusion, the image distance is 36 cm, and the image characteristics are that it is inverted, reduced in size, and real.

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First, the size of Jupiter means that it has a larger core than the other planets.

A larger core means more core particles are interacting to generate a stronger electrical current. The other factor is the speed of Jupiter's rotation. Jupiter's strong magnetic field is generated in Jupiter's thick layers of metallic hydrogen.

Its magnetic field creates a magnetosphere to surround the planet and shield it from solar winds. It traps more charged particles than Earth's. They create belts of intense radiation around Jupiter.

The strong magnetic field is produced by the rotation of the planet and convection in a metallic core. Because Jupiter is so large and spins so fast, its magnetic field is very strong. It is over 20,000 times stronger than Earth's.

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Answer:

white

Explanation:

This experiment causes lines of different colors because the constructive interference depends on the wavelength, so for different wavelength, the position of the maximum will be different.

Now, in diffraction fo a single slit we always have a central maximum (for all the colors)

This means that after the diffraction, we will have that all the colors have a maximum in the center, which will produce white light again, then the color of the central image is white

Answer:

When a proton is placed directly in the path of the proton cannon, it will experience a strong electromagnetic force. The proton cannon emits a beam of protons at high energy and velocity. When the proton in the path of the cannon interacts with the beam, there will be a collision between the two protons.

During the collision, the protons may undergo a process called scattering, where they change direction and momentum. The exact outcome of the collision depends on the energy and angle of the incoming proton, as well as the properties of the target proton. It is possible that the protons may scatter off each other, transferring energy and momentum in the process.

In some cases, the collision may result in the absorption of the incoming proton by the target proton. This can lead to the formation of a more massive particle or the emission of other particles. The specifics of the interaction will depend on the energy and conditions of the proton cannon and the characteristics of the protons involved.

Overall, placing a proton directly in the path of a proton cannon will result in a collision and potential scattering or absorption of the protons, causing changes in their momentum and possibly leading to the creation of other particles.

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After rubbing the a rubber brush on the wool it gets a charge acquired by the passage of electrons. The electrons from the wools escapes to the brush and thus the paper get attracted to electrons in the brush. Hence, option B is correct.

Electric current is the passage of electrons from the negative end to positive end of a  potential difference.

When a an object is rubbed on a conducting material it gets some electrons into it.  When this material comes in contact with another object which have random distribution of charges will attracts the electrons by its positive end.

The rubber brush gets negatively charged on rubbing.  Paper have positive and negative charges in random. When it comes in contact with the negatively charged brush the electrons in the paper repelled away.

The positive charges thus accumulates on the other end of the paper and attracted to the brush. This is an example of static current. Hence option B is correct.

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Answer:

Yes

Explanation:

tamad ako magexplain

Answer:

Yes

Explanation:

The force exerted by a magnet is called

The push or pull of magnetism

can act at a distance, which means that the

magnet does not have to touch an object

to exert a force on it. When you close the

refrigerator, you feel the pull before the

magnet actually touches the metal frame.

There are other forces that act at a distance,

including gravity and static electricity. Later

you will read how the force of magnetism is

related to electricity. In fact, magnetism is

the result of a moving electric charge.

Im pretty sure the answer is A)

The order of descending total current coming out of the battery is Circuit 1, Circuit 2, Circuit 3, Circuit 4.

The total current coming out of the battery can be calculated by the formula I = V/R, where V is the emf of the battery (10 V in this case) and R is the total resistance of the circuit. From this, we can calculate the total current for each of the four circuits:

Therefore, the order of descending total current coming out of the battery is Circuit 1, Circuit 2, Circuit 3, Circuit 4.

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Answer:

Calcium is less reactive than strontium.

hope it helps

The scientist that described an atom made a solid positively charged substance with electrons dispersed throughout it was: Ernest Rutherford

In 1911 Ernest Rutherford proposed his atomic model in which he considered the atom as a positively, densely charged center called a nucleus in which the electrons circulate around the core with a negative charge.

He was responsible for many discoveries in the radioactivity's  fields and nuclear physics.

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

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Answer:65 seconds

Explanation:just had the quiz

the output voltage of the transformer that has 1,000 turns of wire in the primary coil and 50 turns in the secondary coil is 120 V

A transformer is an electrical device that transfer electric energy from one circuit to another.

To calculate the output voltage of the transformer, we use the formula below.

Formula:

Where:

Make V' the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the output voltage of the transformer that has 1,000 turns of wire in the primary coil and 50 turns in the secondary coil is 120 V.

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Answer:

4.55 x 10⁹m

Explanation:

Given parameters:

Mass of object 1  = 3.1 x 10⁵kg

Mass of object 2 = 6.5 x 10³kg

Gravitational force  = 65N

Unknown:

Distance between them  = ?

Solution:

To solve this problem, we use the expression below from the universal gravitational law;

    Fg  =    \(\frac{G mass 1 x mass 2}{distance ^{2} }\)  

   G = 6.67 x 10⁻¹¹

        65  = \(\frac{6.67 x 10^{11} x 3.1 x 10^{5} x 6.5 x 10^{3} }{distance^{2} }\)    

   Distance  = 4.55 x 10⁹m

Their centers are at the distance of "\(4.55\times 10^9 \ m\)".

Given:

Mass,

Gravitational force,

We know,

By using the Gravitational law, we get

→ \(Fg= \frac{GM_1 M_2}{distance^2}\)

By substituting the values, we get

→ \(65 = \frac{6.67\times 10^{11}\times 3.1\times 10^5\times 6.5\times 10^3}{d^2}\)

→   \(d = 4.55\times 10^9 \ m\)

Thus the response above is right.      

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The place that Jupitar exerts the greatest tidal forces on, is the moon named, Io.

Using the Earth as an example, the Moon is pulled by the Earth's gravity, while the Earth is drawn back to the Moon by the Moon's gravity. That indicates that the Moon exerts tidal forces that, if unchecked, would squeeze the Earth in the direction of the Moon and break it apart. Gravity on Earth itself stops that from happening.

This means that the closer the moon is to the Earth, the greater the tidal forces that would be exerted. By this logic, the moon that Jupitar would exert the greatest tidal forces on, would be the moon that is closest to it. This moon is called Io. As the innermost moon to Jupitar, Io gets tidal forces that are said to be 20, 000 times stronger than the tidal forces on Earth.

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Answer:

b

Explanation:

The phrase that describes blackbody radiation is the radiation that is absorbed by an object as it warms.

Blackbody radiation is a radiation produced by heated objects, particularly from a blackbody.

In physics, a blackbody, approximated by a hole in a hollow black sphere, absorbs all incident electromagnetic radiation and reflects none.

Therefore, the phrase that describes blackbody radiation is the radiation that is absorbed by an object as it warms.

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A cannonball has more kinetic energy than the recoiling cannon from which it is fired because the force on the ball acts over a longer distance.

When a cannon fires a cannonball, both the cannon and the cannonball experience an equal and opposite force (Newton's third law).

However, the cannonball has more kinetic energy because the force on it acts over a longer distance.

The cannonball travels a greater distance in the air, while the cannon's motion is restricted due to friction between it and the ground.

This results in a larger work done on the cannonball, which in turn results in more kinetic energy.

Summary: The cannonball has more kinetic energy than the recoiling cannon because the force acts over a longer distance for the cannonball, resulting in more work done and greater kinetic energy.

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