A blue 1400 kg car travels from rest and accelerates at 3.8 m/s/s for 0.035 km. A red 1600 kg car approaches the blue car head-on at a constant speed of 9 m/s. Then they collide, make no noise, and bounce apart. After the collision, the blue car travels at 2 m/s in the opposite direction. What type of collision is this

Answer:

Andrew's dog's speed was 1.89 m/s

Explanation:

Motion at Constant Speed

An object is said to travel at constant speed if the ratio of the distance traveled by the time taken is constant.

This can be written as the formula below:

\(\displaystyle v=\frac{d}{t}\)

Where  

v = Speed of the object

d = Distance traveled

t = Time taken to travel d.

Andrew's dog run a distance of d=17 meters in a time of t=9 seconds, thus its speed was;

\(\displaystyle v=\frac{17}{9}\)

v = 1.89 m/s

Andrew's dog's speed was 1.89 m/s

To calculate the mechanical advantage of a machine, we use the formula: Mechanical Advantage (MA) = Load (L) / Effort (E)

Given:

Load (L) = 100 N

Effort (E) = 200 N

Plugging the values into the formula:

MA = 100 N / 200 N

MA = 0.5

So, the mechanical advantage of the machine is 0.5.

To calculate the efficiency of a machine, we use the formula:

Efficiency = (Output work / Input work) * 100

Given:

Effort (E) = 200 N

Velocity (V) = 25

We know that Work (W) = Force (F) * Distance (D)

The output work can be calculated as the product of the effort and the distance traveled by the effort. The input work can be calculated as the product of the load and the distance traveled by the load.

Let's assume that the distances traveled by the effort and the load are the same.

Output work = Effort (E) * Distance

Input work = Load (L) * Distance

Since the distances are the same, we can ignore them in the efficiency calculation.

Output work = 200 N * Distance

Input work = 100 N * Distance

Efficiency = (Output work / Input work) * 100

Efficiency = ((200 N * Distance) / (100 N * Distance)) * 100

Efficiency = 200%

So, the efficiency of the machine is 200%.

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Answer:

To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.

Answer:

To strike or crash into with resounding impact. To collide or strike with great force. Used to indicate the sound of a forceful blow or collision.

Explanation:

Answer:

sound vibration of spicker

UV rays wοuld be the mοst harmful οn Earth at the equatοr during the summer sοlstice. The strength οf UV rays is highest in the trοpics, especially during the summer sοlstice when the sun is directly οverhead, accοrding tο the text.

UV rays, οr ultraviοlet rays, are a type οf electrοmagnetic radiatiοn that cοmes frοm the sun and has a shοrter wavelength than visible light. They are classified intο three types based οn their wavelength: UVA, UVB, and UVC. UVC rays have the shοrtest wavelength and are the mοst harmful tο living οrganisms, but they are mοstly absοrbed by the Earth's atmοsphere befοre they reach the surface. UVB rays have a lοnger wavelength and can cause sunburn and skin cancer, while UVA rays have the lοngest wavelength and can cause skin aging and wrinkles. Overexpοsure tο UV rays can be harmful tο bοth humans and animals.

The equatοr is lοcated in the trοpics, and the summer sοlstice οccurs when the Earth's tilt is maximized tοwards the sun, resulting in mοre direct sunlight and strοnger UV rays. Therefοre, the cοmbinatiοn οf being in the trοpics and during the summer sοlstice makes the UV rays the mοst harmful.

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Complete question:

Based on the information above, describe the place and time that UV rays would be the most harmful on Earth. Support your answer with facts from the text.

The major advantage of a fuel cell over a standard battery is that a fuel cell can continuously generate electricity as long as fuel and oxidant are supplied, whereas a standard battery has a limited energy capacity and once depleted, needs to be recharged or replaced.

Fuel cells are electrochemical devices that convert the chemical energy of a fuel (such as hydrogen, methanol, or natural gas) and an oxidant (typically oxygen from the air) into electrical energy. They operate through an ongoing electrochemical reaction, which can be sustained as long as the fuel and oxidant are provided.

In contrast, standard batteries store electrical energy in chemical form and release it gradually as needed. Once a battery's stored energy is exhausted, it requires recharging or replacement to restore its functionality.

The continuous electricity generation capability of fuel cells makes them advantageous for applications that require a sustained and reliable power supply, such as in transportation (electric vehicles) and stationary power systems (for homes, businesses, or remote areas). They offer longer operating times without the need for frequent recharging or replacement, providing greater convenience and utility compared to standard batteries.

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Answer:

17.215 m/s^2

Explanation:

L = 0.825 m

It completes 397 oscillations in 546 s.

Time period is defined as the time taken to complete one oscillation.

So, Time period, T = 546 / 397 = 1.375 s

Let g be the gravitational acceleration at that planet.

Use the formula for the time period

g = 17.215 m/s^2

Answer:

he found that a single forece known as gravity keeps the planets in their orbits around the sun gravity force that keeps planets in their orbits calculus a branch of mathmatics partially developed by Newton and used to explain his laws

Explanation:

I hope you have a nice day and please mark me(:

Answer:

There is no law being shown for us to see.

Explanation:

Can you attach something for us to see?

Answer:

a) first class lever

Answer:

After 2 seconds the velocity of the object is 0 m/s.

Explanation:

The velocity at 2 seconds later can be calculated as follows:

\( V_{f} = V_{0} - gt \)

Where:

\(V_{f}\): is the velocity at 2 seconds

\(V_{0}\): is the initial velocity = 20 m/s

g: is the gravity = 10 m/s²

t: is the time = 2 s

Hence, the final velocity is:

\( V_{f} = V_{0} - gt = 20 m/s - 10 m/s^{2}*2 s = 0 m/s \)

This value (0 m/s) means that the object has reached the maximum height.

Therefore, after 2 seconds the velocity of the object is 0 m/s.

I hope it helps you!

Answer:

the advantage gained by the use of a mechanism in transmitting force specifically : the ratio of the force that performs the useful work of a machine to the force that is applied to the machine.

Explanation:

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever.

If you'll looking for a metal that melts at exactly 1000 degrees celcius, then Red Brass melts at exactly 1000 degrees celcius

For a fabric specimen having an absorbance of 0.360,The absorbance value is 369.89.

Wrinkle-free or permanent ironing or permanent ironing is a textile finishing process that avoids wrinkles and creases and improves the appearance of items. Most cellulosic fabrics and cellulosic fabric blends tend to wrinkle or wrinkle.

Calculation:-

The equation is

y = 321.878 + 156.711x

= 321.878 + 156.711 × (0.360)

= 396.89.

Describes fabrics or garments that have been treated to retain their smooth appearance, shape, wrinkles, and/or creases after washing. Such garments require little or no ironing, especially if the garment has been tumble dried. Also called permanent press finish.

Wool woven shirts do not wrinkle easily, whereas 100% linen and cotton linen blend shirts naturally wrinkle easily. Fabrics made from synthetic materials that have inherent stretches, such as nylon and spandex, are also wrinkle-resistant.

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Both a nuclear power plant and a coal-fired power plant boil water to produce steam which turns a turbine to generate electricity.

Both types of power plants also emit carbon dioxide, although the amount emitted by a nuclear power plant is much lower than that emitted by a coal-fired power plant. This is because a nuclear power plant does not burn fossil fuels, but instead uses nuclear reactions to produce heat, which is then used to create steam.

So, to summarize, the similarities between a nuclear power plant and a coal-fired power plant include boiling water to turn a turbine and emitting carbon dioxide, although the amount emitted by a nuclear power plant is significantly lower.

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The size of contact force from the ground is determined as 8000 N.

According to Newton's third law of motion, action and reaction are equal and opposite.

The size of contact force from the ground is equal to the weight of the rock and it is calculated as follows;

Fd = Fn

Fd = 8000 N

Thus, the size of contact force from the ground is determined as 8000 N.

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Answer:(:

Explanation:

discovered alpha and beta rays, and proposed the laws of radioactive decay.

Answer:

The temperature  change in the calorimeter will be lower

Explanation:

Water is an example of a molecular substance. They have relatively low melting points and boiling points usually below 300° C . Water reacts with metals to a degree varying with their position in the electrochemical series.

The specific heat of water is 4179.6 Joules which is relatively high . This typically implies that water absorbs a larger amount of heat but the increase in temperature of its boiling points is relatively low. Thus; in the 200-mm test tube that contains water and was subsequently added to the calorimeter , the heat present was initially absorbed by the water and that does not result to an increase in the temperature change in the calorimeter. Thus the temperature change in the calorimeter will be lower.

Answer:

First at all normal force

Explanation:

F= MG ( 50kg)(9.8m/s)= 490 N

Explanation:

intensity, direction, color, contrast, hardness

The force due to hydrostatic pressure on the dam when the water is 75% of the way up the wall is 735,750 N

The force due to hydrostatic pressure on the dam can be calculated using the formula

P = ρghA

where P is the force, ρ is the density of the water, g is the acceleration due to gravity, h is the height of the water column, and A is the cross-sectional area of the dam.

In this case, the cross-sectional area of the dam is 100 m2 and the height of the water column is 7.5 m (since the water is 75% of the way up the wall, which is a 10m tall wall). Therefore, the force due to hydrostatic pressure on the dam is

P = 1000 kg/m3 x 9.81 m/s2 x 7.5 m x 100 m2

= 735,750 N

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Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

The correct options are:

All cathode-ray particles had the same mass to charge ratio.

The cathode-ray particle behaved identically regardless of the metal used to make it.

The discovery of subatomic particles was a major milestone in the development of modern physics, and the cathode-ray experiments played a significant role in this discovery. The cathode-ray experiments were conducted in the late 19th century by scientists such as J.J. Thomson, who demonstrated that cathode rays were composed of negatively charged particles that were much smaller than atoms. This discovery led to the development of the first subatomic particle model of the atom, in which electrons orbit a positively charged nucleus.

The lines of evidence that supported the hypothesis that the cathode-ray was a subatomic particle were crucial in demonstrating the existence of these tiny particles. The fact that all cathode-ray particles had the same mass-to-charge ratio suggested that they were a fundamental particle rather than a complex mixture of atoms. Similarly, the fact that the cathode-ray particle behaved identically regardless of the metal used to make it supported the hypothesis that the particle was a fundamental constituent of matter.

Overall, the cathode-ray experiments provided important insights into the nature of matter and paved the way for further discoveries in subatomic physics. They demonstrated that the atom was not the smallest particle of matter and helped to establish the idea of subatomic particles as the building blocks of matter.

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Val warms up some soup on the stove and there is no phase change, then the effect of warming the soup is that its particles will have more kinetic energy. Hence, option B is correct.

Kinetic energy is the type of energy that an item or particle possesses as a result of its motion. When work, that transfers energy, is performed on an item by exerting a resultant force, the object accelerates and obtains kinetic energy.

Kinetic energy is a feature of an object moving or particle affected from both its speed and is affected by both its speed and its mass. Rotation, rotation about a plane, vibrations, or any combinations of motions are all possible.

When val warms the soup, the bond between the molecule further break and the space between them will also increase due to which they do random movement and their velocity will also increase and when velocity then by the formula the kinetic energy will also increase.

Therefore, the particles have more kinetic energy.

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According to this equation, so f = 3.29 x 1014 Hz. The light therefore has a frequency of 3.29 x 1014 Hz. The wavelength range of visible light is roughly 400–700 nm, and its frequency range is roughly 400–800 tHz.

The frequencies used by white LED lighting devices are a combination of 474 terahertz, 535 terahertz, and 638 terahertz. White LED technology has made it possible to create inexpensive, energy-efficient lighting that may be utilised in a range of applications, from desk lamps to street lamps.

The capacity to render different kinds of light visible for human sight makes light energy a type of kinetic energy. Light is referred to as an electromagnetic radiation that is produced by hot objects like the sun, lasers, and lightbulbs. Photons, which are tiny energy packets, are present in light.

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Elasticity is of significant importance in the everyday lives of businesses and consumers as it helps them understand and respond to changes in prices and demand for goods or services. By considering elasticity, businesses can make informed decisions regarding pricing strategies, production levels, and resource allocation. Consumers, on the other hand, can assess the impact of price changes on their purchasing decisions and adjust their consumption patterns accordingly.

Elasticity, specifically price elasticity of demand, measures the responsiveness of consumer demand to changes in price. It indicates the percentage change in quantity demanded resulting from a one percent change in price. Understanding price elasticity allows businesses to determine how sensitive consumers are to changes in price and adjust their pricing strategies accordingly.

For example, let's consider the market for gasoline. Gasoline is a highly price-sensitive good, meaning that changes in its price have a significant impact on consumer demand. If the price of gasoline increases, consumers may reduce their consumption and seek alternatives such as carpooling or using public transportation. In this scenario, businesses need to consider the price elasticity of gasoline to predict and respond to changes in consumer behavior. They might lower prices to stimulate demand or introduce more fuel-efficient options to cater to price-conscious consumers.

In conclusion, elasticity matters because it provides valuable insights into the dynamics of supply and demand, enabling businesses and consumers to make informed decisions in response to price changes. By understanding elasticity, businesses can adapt their strategies to maintain competitiveness, while consumers can optimize their purchasing choices based on price sensitivity.

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The electrical charge on an atom is zero due to presence of same number of protons and electrons.

An atom is the smallest entity comprising of three components. These are protons, neutrons and electrons. Protons and neutrons are centrally located forming the nucleus while electrons revolve around the nucleus. Protons are positively charged while electrons are negatively charged. Neutrons are neutral due to lack of charge.

The number of protons and electrons are same in an atom owing to balancing the overall charge in an atom. This makes the atom electrical neutral and hence the charge on an atom is zero.

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A worker bee weighs 1*10-4 kg. One hive has 4 * 10 4 worker bees.

A worker honeybee's weight has been estimated to be between 115 and 128 mg [17, 3]. With a median value of 85 g and a 95% percentile of 249 g, BC depth varied (Figure 5 top).

Male mature African elephants can weigh between 1,800 and 6,300 kg (2 and 7 tons/4,000 and 14,000 lb), making them the largest land creatures. Females weigh between 2,700 and 3,600 kilogrammes (3 and 4 tons/6,000 and 8,000 lb), making them lighter than males. Three to four metres (9.8 and 14.2 feet) between the shoulder blades.

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