On 100 km straight road a car travels the first 50 km with uniform speed of 30 km/h how fast is the car travel in next 50 km so that it has an average speed of 50 km per entire trip

brainliest answer please.

answer:

a. Examples of a force causing an object to start moving are pushing a shopping cart to start moving and applying force to a stationary car to move it forward.

b. Examples of a force causing an object to stop moving are applying brakes to a bicycle to stop it and pushing a toy car in the opposite direction to its motion to slow it down.

c. Examples of a force causing an object to change its direction of motion are hitting a tennis ball with a racket to change its direction and turning a steering wheel to change the direction of a car.

Two examples of field forces are gravitational force and electromagnetic force. Gravitational force is the force that exists between any two objects with mass, and it's responsible for the motion of the planets around the sun. Electromagnetic force is the force that exists between charged particles, and it's responsible for many everyday phenomena such as light and electricity.

Two examples of contact forces observed in everyday life are frictional force and tension force. Frictional force arises between two objects in contact when there is relative motion or tendency of motion between them. Tension force is exerted by a string or rope when it's pulled on from both ends.

The SI unit of force is the Newton (N). The Newton is equivalent to kg⋅m/s^2, which means it can be defined in terms of the fundamental units of mass, length, and time.

Force is a vector quantity because it has both magnitude and direction. When an object is subject to more than one force, the net force on the object is the vector sum of all the forces acting on it. The direction of the net force determines the direction of the resulting motion of the object.

A free-body diagram of a football being kicked would show two forces acting on the ball: the force due to gravity acting downwards and the force exerted by the kicker acting in the direction of the kick. The diagram would show the football as a point mass and the forces as arrows with their tails at the center of mass of the ball. The force due to gravity would be shown as a downward arrow, while the force exerted by the kicker would be shown as an arrow in the direction of the kick. The length and direction of each arrow would be proportional to the magnitude and direction of the corresponding force.

Answer:

Explanation:

The acceleration of an object given it's velocity and time taken can be found by using the formula

\(a = \frac{v}{t} \\ \)

where

a is the acceleration

v is the velocity

t is the time

From the question

v = 27 m/s

t = 8 s

We have

\(a = \frac{27}{8} \\ = 3.375\)

We have the final answer as

Hope this helps you

The intensity of the fire alarm is approximately 3.16 × 10²⁴ in units of watts per square meter (W/m²) rounded to the nearest hundredth.

To find the intensity of a fire alarm that measures 125 dB loud, we can rearrange the formula for loudness to solve for intensity.

The formula for loudness in decibels is given by:

L = 10 log (I / (10⁻¹²))

Where:

L is the loudness in decibels

I is the intensity of the sound

We can rewrite the formula to solve for I:

I = 10^((L / 10) + 12)

In this case:

Loudness (L) = 125 dB

Substituting the value of L into the formula, we have:

I = 10^((125 / 10) + 12)

I ≈ 10^(12.5 + 12)

I ≈ 10^(24.5)

I ≈ 3.16 × 10²⁴

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Answer:

The answer is down below

Explanation:

Las arterias transportan la sangre desde el corazón y se ramifican en vasos más pequeños, formando arteriolas. Las arteriolas distribuyen sangre a los lechos capilares, los lugares de intercambio con los tejidos corporales. Los capilares conducen de regreso a pequeños vasos conocidos como vénulas que fluyen hacia las venas más grandes y finalmente regresan al corazón.

Explanation:

Answer:

True

Explanation:

Answer and Explanation:

True I believe bc if you put a certain amount of force on an object it'll move and depending on where you place the force on the object it'll move in that direction. How much force and how much weight the object has will determine the speed...

Answer:

The car moving with speed 50 mph

Explanation:

We are given that

Distance, s=280 feet=85.3 m

1 feet=0.3048 m

Coefficient of kinetic friction=\(\mu_s=0.3\)

1 m/s=2.237 mph

We have to find the speed of car moving.

Speed, v=\(\sqrt{2\mu_s gs}\)

Where \(g=9.8ms^{-2}\)

Using the formula

Speed of the car,v=\(\sqrt{2\times 0.3\times 9.8\times 85.3}\)

Speed of the car,v=22.4 m/s

Speed of the car, v=\(22.4\times 2.237\approx 50 mph\)

Hence, the car moving with speed 50 mph

Option  d is true.

Answer:

The plants release more heat

An increase in thermal energy on Earth can have a number of effects on plants. Firstly, it can lead to higher temperatures, which can cause some plants to experience decreased growth and increased stress. Additionally, high temperatures can reduce the amount of water available for plants, leading to drought-like conditions in some areas. This can also have a negative effect on the growth of plants. An increase in thermal energy can also lead to an increase in pollen production due to plants flowering earlier in the season, which can be a major problem for people with allergies.

Answer:

The answer is "a, c and b"

Explanation:

Answer:

drawing of ear step by step

Star Sorgan of magnitude 1 would appear the brightest out of the following hypothetical stars.  If you use the highest daily position of the Sun to mark the noon time of a day, then you are using Apparant Solar Times. The star magnitude system that goes from 1 to 6 was constructed by Hipparchus. Option 2 is correct.

The apparent brightness of a celestial object in the sky is called its magnitude. The scale is inverted; lower numbers denote greater brightness. The stars are classified using their magnitudes, which is denoted by 'm. 'A star's apparent magnitude is how bright it appears in the sky as seen from Earth. A star's absolute magnitude is how bright it would be if it were a distance of 10 parsecs (32.6 light-years) from Earth.

The highest daily position of the Sun is used to mark the noon time of a day in the Apparent Solar Times timing system. The star magnitude system that goes from 1 to 6 was created by Hipparchus.

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Answer: The answer is B Hope this helps

Explanation:

An astronomical object is also called a celestial object. It is a naturally occurring physical entity. They are complex, have diverse structures and weights. They even have substructures.

Hence the option B is correct.

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The two physics mistakes that occur in science fiction movies that show a distant explosion in outer space, where you see and hear the explosion at the same time are:

Firstly, in outer space, there is no air or other material to propagate sound.

Second, if there were air or any material then the faster-moving light would reach you before the sound.

Moreover, to travel to us from outer space, the wave must be able to travel through regions of space which are essentially a vacuum. Sound requires a medium to propagate in, so we would not be able to hear the explosion.

Sound and light travel at very different speeds - light travels about a million times faster than sound, so the explosion could not be seen and heard at the same time, it would be heard later.

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The average acceleration of the truck while making the turn is 5 m/s².

Average acceleration is defined as the change in velocity for a particular time interval.

Given that, initial velocity u = 30 m/s towards east = 30 m/s i

Final velocity v = 40 m/s towards south = 40 m/s j

We know the formula for average acceleration as the ratio of change in velocity upon time

⇒ (v - u)/t = (40 j - 30 i)/10 = 4 j - 3 i

The magnitude of average velocity | a'|

| a'| = √3²+4² =√(9 + 16) = √25 = 5 m/s²

Thus, the average acceleration of a truck while making the turn is 5 m/s².

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In a SWOT analysis, the lack of spare production capacity would be considered a weakness because it limits a company's ability to respond to changes in demand or to scale up operations for increased growth opportunities.

SWOT stands for Strengths, Weaknesses, Opportunities, and Threats, and so a SWOT analysis is a technique for assessing these four aspects of your business. SWOT Analysis is a tool that can help you to analyze what your company does best now, and to devise a successful strategy for the future. A SWOT analysis is designed to facilitate a realistic, fact-based, data-driven look at the strengths and weaknesses of an organization, initiatives, or within its industry. In a SWOT analysis, the lack of spare production capacity is considered a weakness because it limits a company's ability to respond to changes in demand or to scale up operations for increased growth opportunities.

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Answer:

18 rotations

3 minutes

rotations per minute (RPM) = 18/3 = 6

Explanation:

The raw file size for a 320x240 12-bit thermal image is 115,200 bytes. Thermal images have smaller raw file sizes than digital camera images because they have lower resolution and color depth, resulting in less data being stored.

(i) To calculate the raw file size for a 320x240 12-bit thermal image, we need to consider the number of pixels and the bit depth. Each pixel in a 12-bit image can have 2¹² (4096) possible values.

The total number of pixels in a 320x240 image is 76,800 (320 x 240). Multiplying this by the bit depth, we get:

76,800 pixels x 12 bits/pixel = 921,600 bits

To convert this to bytes, we divide by 8:

921,600 bits / 8 = 115,200 bytes

Therefore, the raw file size for a 320x240 12-bit thermal image is 115,200 bytes.

(ii) The file size of a thermal image compared to a typical commercial digital camera image for the visible range is generally smaller due to a couple of reasons:

1. Resolution: Thermal images typically have lower resolution compared to commercial digital camera images. The example given is a 320x240 image.

While commercial digital cameras often capture images with higher resolutions like 12 megapixels (e.g., 4000x3000 pixels). The higher-resolution images from digital cameras contain more data per image, resulting in larger file sizes.

2. Color Depth: Thermal images are often grayscale or have limited color palettes. They usually use a lower bit depth, such as 12 bits, to represent the temperature variations.

In contrast, commercial digital cameras capture images with higher color depth, such as 24 bits (8 bits per color channel), resulting in more information per pixel and larger file sizes.

In conclusion, the raw file size of a thermal image is generally smaller compared to a typical commercial digital camera image due to lower resolution and color depth, resulting in less data being stored for each image.

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If the plane requires 0.9 mile of runway and a speed of 190 miles per hour in order to lift off the plane's acceleration is approximately 3.80 mi/hr₂.

We can use the following kinematic equation to solve for the plane's acceleration:

v₂= u₂ + 2as

where v is the final velocity (190 mph), u is the initial velocity (0 mph), a is the acceleration, s is the distance traveled (0.9 mile).

First, we need to convert the distance from miles to feet, since the unit of acceleration is miles per hour squared (mi/hr₂) and we want to keep the units consistent.

1 mile = 5280 feet

So, the distance traveled is:

s = 0.9 mile * 5280 feet/mile = 4752 feet

Plugging in the known values into the kinematic equation, we get:

(190 mph)₂ = (0 mph)₂ + 2a(4752 feet)

Simplifying, we get:

36100 = 9504a

Solving for a, we get:

a = 36100/9504 = 3.799 mi/hr₂

Rounding to two decimal places, the plane's acceleration is approximately 3.80 mi/hr₂.

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In order to determine the density of a cylinder, we need to know its mass and volume. The mass of the cylinder is given as 29.2 grams, but the volume is not provided. Without the volume, it is impossible to calculate the density of the cylinder.

As for whether or not the cylinder will float in water, that also depends on its density. If the density of the cylinder is less than the density of water (1), then it will float. However, without knowing the density of the cylinder, it is impossible to determine whether or not it will float in water.

The formula used to directly calculate the kinetic energy of a mass bouncing up and down on a spring is KE= \(1/2mv^2\).

When a mass is bouncing up and down on a spring, it possesses both potential energy and kinetic energy. The potential energy of the mass is stored in the spring, which is proportional to the displacement of the mass from its equilibrium position. As the mass oscillates back and forth, it also possesses kinetic energy, which is the energy of motion.

The formula used to directly calculate the kinetic energy of a mass bouncing up and down on a spring is KE= \(1/2mv^2\), where m is the mass of the object and v is its velocity. The velocity of the mass is constantly changing as it oscillates back and forth, so the kinetic energy is also constantly changing.

In contrast, the formula KE= \(1/2kx^2\)is used to calculate the potential energy of the mass stored in the spring, where k is the spring constant and x is the displacement of the mass from its equilibrium position. This formula is not directly used to calculate the kinetic energy of the mass bouncing up and down on the spring.

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Answer:

F=-50N

M=200kg

U=15m/s

F=Ma

a=F/M=-50/200=-0.25

V^2-U^2=2aS

0-(15)^2=2(-0.25)S

S=-225/-0.5=450m

V=U+at

0=15-0.25t

t=-15/-0.25=60s

Explanation:

Hope this helps, let me know if you have any questions!

Have a great day.

The process shown is an example of alpha emission, as it involves the emission of an alpha particle (consisting of two protons and two neutrons) from the uranium nucleus to form the thorium nucleus.
The process you provided, 23892U → 23490Th + 42He, is an example of:
b) alpha emission

1. Identify the initial element and the products: The initial element is uranium-238 (23892U), and the products are thorium-234 (23490Th) and helium-4 (42He).
2. Compare the initial element and the products: The uranium-238 nucleus loses two protons and two neutrons, forming thorium-234 and a helium-4 nucleus.
3. Determine the type of radioactive decay: Since a helium-4 nucleus (also known as an alpha particle) is emitted, this process is an example of alpha emission.

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(a) The magnitude of the electric field produced by a charge of 4.50 mC at a distance of 1.00 m can be calculated using Coulomb's law.

Coulomb's law states that the electric field strength (E) is directly proportional to the magnitude of the charge (q) and inversely proportional to the square of the distance (r) between the charge and the point of interest.

Mathematically, E = k*q/r^2, where k is the electrostatic constant. The magnitude of the electric field produced by a charge of 4.50 mC at a distance of 1.00 m is 4.05 x 10^6 N/C.

The magnitude of the electric field produced by a charge of 4.50 mC at a distance of 1.00 m can be calculated using Coulomb's law. Plugging in the values, we have E = (9 x 10^9 N m^2/C^2) * (4.50 x 10^-3 C) / (1.00 m)^2 = 4.05 x 10^6 N/C.

The magnitude of the electric field produced by a charge of 4.50 mC at a distance of 1.00 m is 4.05 x 10^6 N/C.

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Answer:

\(D(t) = 9(0.93)^t cos(30 \pi t)\)

Explanation:

Amplitude begins at 9 cm, \(A_0 = 9 cm\)

The amplitude decreases by 7% (0.07) each second

The amplitude function can then be modeled as:

\(A(t) = A_0(1 - 0.07)^t\\A(t) = 9(0.93)^t\)

The spring oscillates 15 times each second, the period of oscillation (time to make 1 oscillation) will therefore be calculated as:

T = 1/15

\(\frac{2\pi }{B} = \frac{1}{15} \\\\B = 30\pi\)

The graphical equation of the system described is:

\(D(t) = A cos ( Bt - C) + D\)

Horizontal shift, C = 0

Vertical shift, D = 0

\(D(t) = 9(0.93)^t cos(30 \pi t)\)

Answer:

No, the amount of matter of the reactants is not equal to the amount of matter of the products.

Explanation:

According to the conservation of matter the amount of matter of the reactants is equal to the amount of matter of the products. The given reaction is

\(2H_2O_2=H_2+O_2\)

In the reactant side there are \(2\times 2=4\) molecules of hydrogen and \(2\times 2=4\) molecules of oxygen.

In the product side there are 2 molecules of both hydgrogen and oxygen. So the reaction does not satisfy the law of conservation of mass.

The balanced reaction would be

\(2H_2O_2=2H_2+2O_2\).