A 0.5kg stone moving north at 4 m/s collides with a 4kg lump of clay moving west at 1 m/s. The stone becomes embedded in the clay. What is the velocity (magnitude and direction) of the composite body after the collision?

Answer: 896J

Explanation:

Given that

Mass of motorcycle = 112kg

kinetic energy = ?

velocity of the motorcycle = 4m/s

Since kinetic energy is the energy possessed by a moving object, and it depends on the mass (m) of the object and the velocity (v) by which it moves. Therefore, the motorcycle has kinetic energy

i.e K.E = 1/2mv^2

KE = 1/2 x 112kg x (4m/s)^2

KE = 0.5 x 112 x 16

KE = 896J

Thus, the motorcycle has 896 joules of kinetic energy.

Answer:

the so-called alkali metals, the most used of all is potassium

Explanation:

The photoelectric effect is the expulsion of electrons from metals by effect of incident radiation.

To see this effect, materials with a small work function are needed, so the most used materials are the materials of group i of the periodic table, the so-called alkali metals, the most used of all is potassium

Answer:

5N

Explanation:

From Newton's third law, we understood that to every action, there is an equal an opposite reaction.

Since Arti's foot exerts a force of 5N on the ball, then, an equal and opposite force of 5N will be exerted on Arti's foot as understood from Newton's third law.

Therefore, a force of 5N will be exerted on Arti's foot.

Two forces interact when Arti kicks a football - Arti's foot exerts a 5N force on the ball, and the ball exerts a 5N force on Arti's foot.

When Arti kicks a football, two forces interact - Arti's foot exerts a force of 5N on the ball.

According to Newton's Third Law of Motion, for every action, there is an equal and opposite reaction. So, the ball exerts a force of 5N on Arti's foot in the opposite direction. Therefore, the size of the force exerted on Arti's foot is also 5N.

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Answer:

Mars

Explanation:

Answer:

12.9m

Explanation:

Gravitational Potential Energy=mass×gravitational

field strength×height

GPE=mgh

11000J=85kg×10N/kg×Height

Height=11000÷850

= 12.9m(to 3s.f)

The climber's height is approximately 13.2 meters.

Using the formula for gravitational potential energy:

PE = mgh, where PE is potential energy, m is mass, g is the acceleration due to gravity (9.8 m/s2), and h is height.

Based on the information provided, the climber has a potential energy (PE) of 11000 J and a mass (m) of 85 kg.

Therefore, we can rearrange the formula to solve for height (h):

h = PE / (mg).

Plugging in the given values gives us

h = 11000 J / (85 kg× 9.8 m/s2), which we can then calculate.

After performing the calculation, the climber's height comes out to be approximately

h = 11000 J / (85 kg×9.8 m/s2)

= 11000 / 833

= 13.2 meters.

Answer: 15

Explanation:

The mass of the ion is the sum of the protons and neutrons inside its nucleus.

i.e Mass number = protons + neutrons

Mass number = 8 protons + 7 neutrons

= 15

Furthermore, since the number of protons differ from the number of electrons by 2, the ion was formed when its atom gained 2 electrons. Thus, it is a negatively charged ion (anion) with a mass of 15

Answer:

4386250J

Explanation:

In the picture above.

Hope this helps.

Final answer:

The kinetic energy of a truck with a mass of 2900 kg moving at 55 m/s is calculated using the formula KE = ½ mv², resulting in 4,386,250 joules (J).

Explanation:

To calculate the kinetic energy (KE) of a truck with a mass of 2900 kg moving at 55 m/s, we use the formula:

KE = ½ mv²

Where:

By plugging in the values:

KE = ½ (2900 kg) (55 m/s)²

KE = ½ (2900) (3025)

KE = 0.5 × 2900 kg × 3025 m²/s²

KE = 4,386,250 J

The kinetic energy of the truck is 4,386,250 joules (J).

Answer:

radiation

Explanation:

if there was no radiation there would be an iceage

Answer:

Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.

Answer:

2 charges of electron (2C)

Explanation:

I = Q/t

2 = Q/1

Q = 2×1= 2C

Q = 2 charge of electron

Answer:

the answer would be D. Yelling out in a cave and hearing your voice call back to you

Explanation:

Answer: A familiar example of a trajectory is the path of a projectile, such as a thrown ball or rock. In a significantly simplified model, the object moves only under the influence of a uniform gravitational force field. ... In this simple approximation, the trajectory takes the shape of a parabola.

Explanation:

Answer:

A

Explanation:

Answer:

C. are bent when two charges interact.

Explanation:

took the quiz on A p e x

Answer:

The electric force is [tex]6.2\cdot 10^{35}[/tex] times stronger than the gravitational force

Explanation:

The magnitude of the electrostatic force between two charges is given by:

[tex]F_E=k\frac{q_1 q_2}{r^2}[/tex]

where:

[tex]k=8.99\cdot 10^9 Nm^{-2}C^{-2}[/tex] is the Coulomb's constant

[tex]q_1, q_2[/tex] are the two charges

r is the separation between the two charges

In this problem:

[tex]q_1=1.6\cdot 10^{-19}C[/tex] (charge of the proton)

[tex]q_2=3.2\cdot 10^{-19}C[/tex] (charge of a nucleus of helium, twice the charge of a proton)

[tex]r=100 \mu m = 100\cdot 10^{-6} m[/tex]

So the electric force is

[tex]F_E=(8.99\cdot 10^9)\frac{(1.6\cdot 10^{-19})(3.2\cdot 10^{-19})}{(100\cdot 10^{-6})^2}=4.6\cdot 10^{-20} N[/tex]

Instead, the magnitude of the gravitational force between two objects is given by :

[tex]F_G=G\frac{m_1 m_2}{r^2}[/tex]

where

[tex]G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}[/tex] is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between them

Here we have:

[tex]m_1=1.67\cdot 10^{-27}kg[/tex] is the mass of the proton

[tex]m_2=6.68\cdot 10^{-27}kg[/tex] is the mass of a nucleus of helium (4 times the mass of the proton)

[tex]r=100 \mu m = 100\cdot 10^{-6} m[/tex] is the separation

So the gravitational force is

[tex]F_G=(6.67\cdot 10^{-11})\frac{(1.67\cdot 10^{-27})(6.68\cdot 10^{-27})}{(100\cdot 10^{-6})^2}=7.4\cdot 10^{-56} N[/tex]

So, we see that the electric force is much stronger than the gravitational factor, by a factor of:

[tex]\frac{F_E}{F_G}=\frac{4.6\cdot 10^{-20}}{7.4\cdot 10^{-56}}=6.2\cdot 10^{35}[/tex]

Answer:

yes B is correct

Explanation:

Species A and C are related to humans. Therefore, the correct option is option B among all the given options.

A multicellular organism's embryo is the first stage of development. In sexually reproducing animals, gametophyte is the stage of the life cycle which thus begins immediately after implantation of both the female egg cell even by male sperm cell.

The resultant merger of these two cells results in a single-celled zygote which divides into cells are known as blastomeres. Species A and C are related to humans.

Therefore, the correct option is option B.

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Answer:

compressions

Explanation:

compressions part of the wave are the particles of the medium closer together. Hence option B is correct.

Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform. There are two types of the wave longitudinal wave and transverse wave.

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Answer:

The answer is biodiversity

Explanation:

Answer:

Batteries use electrolytes and similar metals to produce a flow of electrons.

Answer:

D. Batteries convert chemical potential energy into electric energy

Explanation:

It was the correct answer on OW

The acceleration will be "3 mph/s".

According to the question,

Final velocity,

Initial velocity,

Time,

As we know the formula,

→ [tex]Acceleration =\frac{Final \ velocity-Initial \ velocity}{Time}[/tex]

By substituting the values, we get

→                       [tex]= \frac{45-15}{10}[/tex]

→                       [tex]= \frac{30}{10}[/tex]

→                       [tex]= 3 \ mph/s[/tex]  

Thus above answer is right.

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Answer: 298800 metres

Explanation:

Given that:

speed of polar bear = 8.3 m/s

Distance traveled = ?

Time taken = 10.0 hours

Since the SI unit of time is seconds, convert time in hours to seconds

1 hour = 60 minutes & 1 minute = 60 sec

So, 10.0 hours = (10 x 60 x 60)

= 36000 seconds

Apply the formula:

speed = distance traveled / time taken

8.3 m/s = distance traveled / 36000 seconds

Distance traveled = 8.3m/s x 36000 sec

= 298800 metres

Thus, the polar bear traveled 298800 metres.

The geocentric model of the solar system was accepted because it made sense based on observations at the time. The heliocentric model became accepted later thanks to the work of Copernicus and Galileo.

The geocentric model of the solar system was accepted by scientists for many years because it appeared to make sense based on the observations at the time. In the geocentric model, Earth was believed to be at the center of the universe, with the planets and the Sun orbiting around it. This model was supported by the apparent motion of the celestial bodies in the sky.

For centuries, people observed that the Sun appeared to rise in the east and set in the west, while the planets seemed to move across the sky in different paths. The geocentric model provided a simple explanation for these observations. Additionally, there was a lack of evidence at the time to support an alternative model.

It was not until the 16th century, with the work of Nicolaus Copernicus and later Galileo Galilei, that the heliocentric model of the solar system started gaining acceptance. The heliocentric model, with the Sun at the center, provided a more accurate explanation for the motion of the planets, as well as other astronomical phenomena. The development of telescopes and advancements in observations also contributed to the acceptance of the heliocentric model.

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The geocentric model was accepted for years due to its ability to predict planetary motions and its alignment with religious and philosophical beliefs.

The geocentric model, which positioned Earth at the center of the universe, was accepted by scientists and scholars for many years due to a combination of observational, philosophical, and religious reasons.

Even when Greek astronomers suggested that it was more natural for smaller objects to revolve around larger ones, the Ptolemaic model persisted because it was able to predict planetary motion with reasonable accuracy through complex mechanisms like epicycles and deferents.

The geocentric model was further reinforced by the fact that it was embedded in the teachings of the Church, and the heliocentric idea faced significant resistance due to the societal and theological implications of displacing Earth from the cosmic center.

It was not until the works of astronomers such as Copernicus, Brahe, Kepler, and Galileo provided substantial evidence that the heliocentric model began to gain acceptance over the geocentric model.

Answer:

the answer is D

Explanation:

30-amp 240-volt circuit: 30 amps x 240 volts = 7,200 watts hope this helps

Answer:

I believe the answer is 7200Wats

Explanation: checked the other sources and they didn't match up

Answer:

W and X

Explanation:

When escaping a rip current, one should always walk to the side until you escape from the rip current. If you walk towards the shore, you have the ability to keep getting dragged toward the current, such as with X and Y.

Answer:A

Explanation:

Should be position 1.

Answer:yes it is possible

Explanation:it is possible because when you add both of them it becomes red

Answer: the mother has bb (or red) hair.

Explanation:

The mother is red headed. So, a Bb brown haired father and a bb red headed mom gave their child bb (recessive) traits. When shown in a punnet square, bb is an option.

Answer:

B.) The glass and paper have different charges

Explanation:

Answer:  

The glass and paper have different charges

Explanation:

did the instruction on edge

Explanation:

Momentum = mass × velocity

p = (65 kg) (5 m/s)

p = 325 kg m/s

1) 10.8 cm, shrunken

2) 19.7 cm

3) 8.8 cm

4) See explanation

Explanation:

1)

A mirror works on the principle of reflection: a ray of light coming from an object is reflected back by the mirror, producing an image of the object.

The position of the image can be found by using the mirror equation:

[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]

where

f is the focal length of the mirror

p is the position of the object

q is the location of the image

In this problem:

f = 7 cm is the focal length of the mirror

p = 20 cm is the position of the object

So we can find q from the equation:

[tex]\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{7}-\frac{1}{20}=0.0929\\q=\frac{1}{0.0929}=10.8 cm[/tex]

The sign of q is positive: this means the image is real.

The magnification of the image is given by

[tex]M=\frac{y'}{y}=-\frac{q}{p}[/tex]

where

y' is the size of the image

y is the size of the object

M is the magnification

Substituting,

[tex]M=-\frac{10.8}{20}=-0.54[/tex]

Which means that he image is shrunken, (because [tex]|M|<1[/tex]), so [tex]y'<y[/tex].

2)

A lens works on the principle of refraction: the rays of light coming from an object are refracted into the focal point of the lens, and they can produce an image of the object.

We can solve the problem by using the lens equation:

[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]

where

f is the focal length of the length

p is the position of the object

q is the location of the image

In this problem we have:

q = 51.5 cm is the location of the image

p = 32 cm is the position of the object

Solving for f, we find the focal length:

[tex]\frac{1}{f}=\frac{1}{32}+\frac{1}{51.5}=0.051\\f=\frac{1}{0.051}=19.7 cm[/tex]

3)

In this problem, we know the following data:

[tex]f=+17 cm[/tex] is the focal length (for a converging lens, it is positive)

[tex]y=5.5 cm[/tex] is the height of the object

[tex]y'=13.8 cm[/tex] is the height of the image

[tex]q=-22 cm[/tex] is the location of the image (it is negative because the image is virtual)

From the magnification equation, we can find the position of the object:

[tex]\frac{y'}{y}=-\frac{q}{p}[/tex]

And solving for p, the position of the object, we find:

[tex]p=-\frac{qy}{y'}=-\frac{(-22)(5.5)}{13.8}=8.8 cm[/tex]

So, the object should be located 8.8 cm from the lens.

4)

The images produced by a lens or by a mirror can be of two types: