Two children, totaling 200 kg, are traveling at 10 m/sec in a 100-kg bumper car during an
amusement park ride. They deliberately collide with an empty second car, mass 100 kg, which is
at rest. What is the momentum of the empty car?

Answer:

C)  10 m/s^2 toward the center of the planet

Explanation:

g = GM/r^2

The masses of earth and this planet are the same and the radius is only diffferent by 10% so as gravitational force acceleration is 9.8m/s^2 on earth, it can be estimated to be around 10m/s^2.

Using the third law, we know acceleration is toward the larger mass from attraction, thus having it point toward the center of the planet.

Answer:This statement seems incomplete. Please provide the rest of the question.

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In stretching or compressing the spring by a distance of x (in meters), one performs 1/2 (350 N/m) x² of work on the spring, or equivalently the spring performs -1/2 (350 N/m) x² of work on the door. This work is negative since the restoring force of the spring opposes the force used to stretch or compress the spring.

Then when the spring is allowed to relax, it performs 1/2 (350 N/m) x² of work to return it to equilibrium position. The force from the spring acts in the direction of the door's motion, so the work done is positive once more.

Now, the work done on the door …

• … to return it from 85.0 cm = 0.850 m to equilibrium is

1/2 (350 N/m) (0.850 m)² = 126.4375 J

• … to return it from 5.0 cm = 0.050 m to equilibrium is

1/2 (350 N/m) (0.050 m)² = 0.4375 J

• … to relax from 85.0 cm to 5.0 cm from equilibrium is

126.4375 J - 0.4375 J = 126 J

Magnitude and direction of the acceleration is 2.5 m/s² (Toward west)

Given that;

Initial speed of car = 2 m/s

Final speed of car = 12 m/s

Time taken = 4 second

Find:

Magnitude and direction of the acceleration

Computation:

Acceleration = [v - u] / t

Magnitude and direction of the acceleration = [12 - 2] / 4

Magnitude and direction of the acceleration = 10 / 4

Magnitude and direction of the acceleration = 2.5 m/s² (Toward west)

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Complete question is;

Block 1 is resting on the floor with block 2 at rest on top of it. Block 3, at rest on a smooth table with negligible friction, is attached to block 2 by a string that passes over a pulley, as shown in the attachment below. The string and pulley have negligible mass.

Block 1 is removed without disturbing block 2.

Derive an equation for the acceleration of block 3 for any arbitrary values of m3 and m2. Express your answer in terms of m3, m2, and physical constants as appropriate.

Answer:

a = (m2)g/(m3 + m2)

Explanation:

Looking at the attached image, if we consider the free body diagram for block 3, by using Newton's first law of motion, we will arrive at the formula;

T = (m3)a - - - (eq 1)

where;

T is the tension in the string

a is acceleration

m3 is mass of block 3

Meanwhile doing the same with Block 2, the free body diagram would give us the formula; (m2)g - T = (m2)a

Making T the subject gives us;

T = (m2)g - (m2)a - - - (eq 2)

where;

g is acceleration due to gravity

T is the tension in the string

a is acceleration

m2 is mass of block 2

To solve for the acceleration, we will just substitute (m3)a for T in eq 2.

Thus;

(m3)a = (m2)g - (m2)a

(m3)a + (m2)a = (m2)g

a(m3 + m2) = (m2)g

a = (m2)g/(m3 + m2)

The ratio of the tangential speed of a point on the rim to the tangential speed of a point halfway between the center and the rim is 2.

The correct option is B.

The wheel's angular velocity The rate at which the angular displacement changes over time is known as the wheel's angular velocity. Because the angular velocity is constant, a point just on rim will have constant tangential velocity.

The angular velocity of a body refers to the pace at which it revolves or circumambulates an axle. Sometimes, the Greek letter omega symbolizes angular velocity. Due to the fact that it is expressed as an angle every unit of time, the angular velocity in the SI was measured in radians per second.

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It accelerates at about 32 feet per second every second, so it starts falling at zero feet per second and, one second later it is traveling at 32 feet per second. That means that its average speed is 16 feet per second, so it will fall 16 feet in the first second.

Answer:

b

Explanation:

Answer:

they transfer energy

Explanation:

1) They have valence electrons in the same energy level.

2) Helium atoms have 2 valence electrons, while atoms of the other elements in the group all have 8 valence electrons.

3) cesium (Cs)

4) There are two electrons in the first energy level and seven electrons in the second energy level.

In the periodic table, elements are arranged in order of increasing atomic number into groups and periods.

In the periodic table, we have an arrangement of atoms based on their respective groups and periods.

If I pick two representative elements in the same period, their number of valence electrons will differ by 1 but they will all be accommodated in the same energy level.

Helium is the first member of group 18. Unlike the other members of the group, its first shell is also its valence shell. It has two and not eight valence electrons like other members of the group.

The electronic configuration of Ca is [Ar] 4s², that of Li is [He] 2s1, that of Cs is [Xe] 6s1, that of Br is [Ar] 4s² 3d¹⁰ 4p⁵ and that of oxygen is [He] 2s² 2p⁴.

We can see that only Cs has  valence electrons in higher energy orbitals than those of Ca.

Lastly, Fluorine is in group 17. There are nine electrons in this atoms. They arranged in such a way that there are two electrons in the first shell and seven electrons in the second shell.

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Answer:

These terms are crucial to understanding the unit. axle.

a pin or pole around which a wheel revolves. complex machine any device made up of more than one simple machine;

a compound machine. force.

the strength or energy that moves an object. ...

each other. ...

the point around which a lever pivots or turns. ...

machine. ...

simple machine.

Answer:

Different and better?

Explanation:

i dont think that helps lol

An educated person has the ability to think clearly and independently and has good judgement.

Education is defined as purposeful activity directed towards achieving some objective, such as the dissemination of knowledge or the promotion of skills and character traits, whose aims include the development of understanding, rationality, kindness and honesty.

There are three main types of education which are as follows:

Formal, Informal and Non-formal.

The specialty of education is that it is pre-determined and pre-planned. It is regular and spatial i.e. time bound and regulated by the institutional. Proper education improves people's understanding of the world around them which make them less susceptible to the influence of others

Thus, an educated person has the ability to think clearly and independently and has good judgement.

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Answer:

4.88 m/s

Explanation:

Vertical component would be  12 * sin 24  =  4.88 m/s

Horizontal is   12 * cos 24

Answer:

B. Newton's second law of motion

Explanation:

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

\( Net \; Force = mass * acceleration \)

Making acceleration the subject of formula, we have;

\( Acceleration = \frac {Net \; Force}{Mass} \)

In this scenario, the acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. Thus, this example best illustrates Newton's second law of motion.

The solar system is the planetary system that includes the Sun and all of the objects that orbit around it. These objects include planets, dwarf planets, moons, asteroids, comets, and other space debris.

The eight planets in the solar system, in order of their distance from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was previously classified as the ninth planet but has since been reclassified as a dwarf planet.

The largest planet in the solar system is Jupiter, which is also the fifth planet from the Sun. Jupiter is a gas giant, meaning that it is primarily composed of hydrogen and helium, and has numerous moons, including the four largest known as the Galilean moons.

The inner planets, including Mercury, Venus, Earth, and Mars, are known as the terrestrial planets because they are primarily composed of rock and metal. They are also relatively small in size compared to the gas giants.

The solar system is constantly in motion, with each object following its own unique orbit around the Sun. These orbits are affected by the gravitational pull of other objects in the solar system, which can cause objects to change their paths or collide with one another.

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Answer:

For Bill to dump the water on Tim, Tim should be 7.232 meters from the tree when Bill dumps the water

Explanation:

The given height above the ground at which Bill sits on the tree branch with a bucket of water, h = 4.0 meters

The speed with which Tim is approaching the tree = 8.0 meters per second

The time , t, it will take for the bucket of water to reach the ground is given by the equation of free fall as follows;

h = 1/2·g·t²

Where;

h = Height = 4.0 m

g = The acceleration due to gravity ≈ 9.8 m/s²

t = The time

Making t the subject of the above equation gives;

t = √(h/(1/2·g))

Substituting the known values gives;

t = √(4.0 m/(1/2 × 9.8 m/s²)) ≈ 0.904 s

t ≈ 0.904 seconds

Therefore, for Bill to dump the water on Tim, it should take Tim approximately 0.904 seconds to get to the tree

The distance, d, Tim will be when it will take him 0.904 seconds to get to the tree is given from the kinematic equation of speed, s, as follows;

Distance, d = Time, t × Speed, s

Where;

d = The distance

t = The time = 0.904 s

s = The speed with which Tim is approaching the tree = 8.0 m/s

Substituting the values gives;

d = 0.904 s × 8.0 m/s = 7.232 m

Therefore, the distance Tim should be when Bill throws the water = 7.232 meters

Answer:

Explanation:

Try adding what process they have to go through to become a scientists the try adding some things that you think they work on in the labs.

Answer:

I don't even know

Explanation:

Shower thoughts

Answer:we could be an allusion but we prolly will never kno.. so much of the world is convinced, its all jus a convincing game.. i believe in past lives, future lives. i think in my past life i was stabbed and then the slit my side from the chest to right below my stomach, due to freckles lining up

Answer:

B.

Goals are scored by kicking the ball through goalposts.

Explanation:

Answer:

The mass of the object does not change by moving it to another place. ... At the center of the earth the net gravitational force is zero, so the weight will be zero, but its masses will remain same. Hence the mass at the centre of earth will be equl to 50 kg.

Explanation:

It's because the mass of the object doesn't change by moving it to next place.

The linear velocity of the point two-thirds the length of the rod away from its lower end when it hits the floor is sqrt(2gh/3), where g is the acceleration due to gravity and h is the height from which the rod is dropped.

To calculate the linear velocity of the point two-thirds the length of the rod away from its lower end when it hits the floor, we need to use the conservation of energy principle. We know that the potential energy at the top of the rod is equal to the kinetic energy when it hits the floor.

Assuming the rod is dropped from rest and neglecting air resistance, we can use the equation:

mgh = (1/2)mv^2

Where m is the mass of the rod, g is the acceleration due to gravity, h is the height of the rod, and v is the velocity of the rod when it hits the floor.

Since the point two-thirds the length of the rod away from its lower end has traveled (1/3)h, we can use the proportion:

(1/3)h / (2/3)l = h / L

Where l is the length of the rod and L is the distance from the lower end to the point two-thirds the length of the rod away.

Rearranging, we get:

L = (2/3)lh / h = (2/3)l

Substituting into the first equation and solving for v, we get:

v =√(2gh/3)

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Answer:

600 miles

Explanation:

60x10

The words experiences in Niels Bohr's life that led to his interest in science and the study of the atom is he disliked writing essays and talented in mathematics.

Atom is the smallest unit of the element. Different elements have different size atoms and same element have same size atoms.

Neil Bohr loved talking, he had a disliking of writing essays. He was talented in mathematics. He then attracted to the sciences. Physics  interested Neil and when he was a teenager, he started correcting the mistakes in his school's textbooks.

The contributions are present in the modern atomic model. They are: All matter consists of atoms. Atoms of the same element are the same in size and atoms of different elements are different. Atoms combine in whole-number ratios to form compounds.

Thus, Physics interested him to further study for atom.

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98.9°F is equivalent to 37.17°C temperature. Using Formula: °C = (°F - 32) x 5/9

To convert 98.9°F to Celsius (°C), you can use the following formula:

°C = (°F - 32) x 5/9

Substituting 98.9 for °F in the formula, we get:

°C = (98.9 - 32) x 5/9 = 37.17

Therefore, 98.9°F is equivalent to 37.17°C.

It's important to note that when converting Fahrenheit to Celsius, the resulting Celsius temperature is often more precise with decimal places. In this case, the Celsius temperature is 37.17°C, which means that the temperature is between 37°C and 38°C.

To double-check your conversion, you can also use online temperature conversion tools or smartphone apps that are readily available and accurate.

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0.02 °C  is the resolution of thermometer B while measuring temperature.

Thermometer A= 87.6

Thermometer B=87.4°C

resolution= 87.6- 87.4°C = 0.02 °C

Heat or cold are measured in terms of temperature. It can be defined in terms of a variety of arbitrary scales and shows how heat energy naturally moves from a hotter to a cooler substance (one at a lower temperature). Even if a match burns at a considerably greater temperature than an iceberg, an iceberg has a much higher overall heat energy. The energy of a thermodynamic system differs from temperature.

Temperature, along with pressure, density, and other related qualities, is referred to as an intense property—one that is independent of the amount of material being addressed—in contrast to broad characteristics like mass or volume.

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The superposition of waves due to their interaction can either produce a constructive or destructive interference.

Wave superposition refers to the the interaction of two or more waves when their parts overlap.

Example of wave superposition is multiple waves travelling through a rope.

The superposition principle states that when two or more waves overlap in space, the resultant disturbance is equal to the algebraic sum of the individual disturbances.

Based on phase difference between two or more waves, the superposition if the waves can result in either constructive or destructive interference .

Therefore, the superposition of waves due to their interaction can either produce a constructive or destructive interference.

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Answer:

The displacement traveled by the elephant is 9600 east

Explanation:

Displacement is defined as an object's change in position which is given by the difference between final and initial location of the object

The displacement of the elephant are, taking east as positive direction of motion;

1) 7.9 km east = + 7.9 km

2) 1.9 km west = -1.9 km

3) 3.6 km east = 3.6 km

The net (sum) displacement of the elephant, ∑Δx is given as follows;

∑Δx = 7.9 km - 1.6 km + 3.6 km = 9.6 km

Given that the sum of the displacement is positive and that 9.6 km = 9600 m, we have;

The displacement traveled by the elephant = ∑Δx =  9600 east.

Answer:

vibrates, and they carry energy from one place to another. Look at the sound wave and the water wave. vibrating electric charges and can travel through space where matter is not present. to particle, electromagnetic waves travel by transferring energy between vibrating electric and magnetic fields.

Answer:

D.400 watt

Explanation:

where Pave = average power

Irms=RMS current &

Vrms=RMS voltage

The voltage drop across the 180 ohm resistor is 7.50 volts.

To find the voltage drop across the 180 ohm resistor, we can use Ohm's Law, which states that voltage (V) is equal to the product of current (I) and resistance (R), or V = I * R.

Since the resistors are connected in series, the current passing through both resistors is the same. Let's call this current I.

We know the voltage drop across the 120 ohm resistor is 5.00 V. Using Ohm's Law for the 120 ohm resistor, we have 5.00 V = I * 120 ohms. Rearranging this equation, we can find the value of I:

I = 5.00 V / 120 ohms

I = 0.0417 A (rounded to four decimal places)

Now that we have the current, we can use Ohm's Law again to find the voltage drop across the 180 ohm resistor:

V = I * R

V = 0.0417 A * 180 ohms

V = 7.50 V (rounded to two decimal places)

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