50 POINTS!! BRAINLEST

It is usually best to reduce speed to suggested limit when  a driver gets to a speed hump and is denoted as option D.

This refers to a situation in which the speed or acceleration of a body is reduced while in the other hand, acceleration refers to the condition in which a body increases its speed or acceleration.

Speed humps are structures which are placed in the road in other to slow vehicles to between 10 to 15 mph. They ensure over speeding is checked due to it being dangerous to other users.

Applying brake or maintaining current speed may lead to the vehicle being tilted towards the front end which may result in collision and other forms of accident.

This therefore the reason why reducing speed to suggested limit is the most appropriate choice.

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Answer:

collision between truck

Explanation:

Answer. Collision between trucks, because more is the mass, more is the inertia and therefore more is the momentum. Mass of the trucks is more than that of cars so collision of trucks will cause more damage.

Answer:

A

Explanation:

it should be 70 times ten^-5

Answer:

A. 70 x 10^6m

Explanation:

Viscosity is inversely proportional to the flow of liquid and directly proportional to the force of attraction between atoms

means higher the viscosity higher is the force of attraction between atoms and lesser the flow of liquid

Explanation:

The frequency of the wave would be approximately 3.125 Hz.

The frequency of a wave is the number of complete cycles or oscillations it completes in one second. the frequency (f) is the reciprocal of the period (T)  which is the time it takes for one complete cycle.

In this case  if the period is 0.32 seconds, the frequency would be:

f = 1 / T

f = 1 / 0.32

f ≈ 3.125 Hz

Therefore, the frequency of the wave would be approximately 3.125 Hz.

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Answer: B

Explanation: it is perpendicular to a surface

Answer:

it is perpendicular to a surface

Explanation:

Initial launch speed of the cars are in order as  Vcar 1 = Vcar 2< Vcar 3

Speed (often abbreviated as "s") is a scalar variable that describes how much an object's location changes over time or how much it changes per unit of time. The average speed of an item in a period of time is the distance traveled by the object divided by the duration of the period.

Time divided by distance are the speed-related metrics.. The meter per second (m/s) is the SI unit of speed, while the kilometer per hour (kph) is the most often used unit of speed in daily life.

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A. State of motion

B. Sachin

C. State of rest

We know

\(\\ \rm\rightarrowtail a=a_oe^{-\gamma t}\dots(1)\)

Now amplitude becomes half after 10oscillations .

\(\\ \rm\rightarrowtail a=\dfrac{a_o}{2}\)

From eq(1)

\(\\ \rm\rightarrowtail a=a_o e^{-\gamma t}\)

\(\\ \rm\rightarrowtail \dfrac{a_o}{2}=a_o e^{-\gamma t}\)

\(\\ \rm\rightarrowtail \dfrac{1}{2}=e^{-\gamma t}\)

\(\\ \rm\rightarrowtail 2^{-1}=e^{-2\gamma}\)

\(\\ \rm\rightarrowtail 2=e^{2\gamma}\)

\(\\ \rm\rightarrowtail 2\gamma=ln2\)

\(\\ \rm\rightarrowtail \gamma=\dfrac{ln2}{2}\dots(2)\)

Again from eq(1)

\(\\ \rm\rightarrowtail a=a_o e^{-\gamma t}\)

\(\\ \rm\rightarrowtail \dfrac{a_o}{a}=e^{\gamma t}\)

\(\\ \rm\rightarrowtail ln\left(\dfrac{a_o}{a}\right)=\gamma t\)

\(\\ \rm\rightarrowtail ln\left(\dfrac{a_o}{a}\right)=\left(\dfrac{ln2}{2}\right)t\)

\(\\ \rm\rightarrowtail ln1000=\left(\dfrac{ln2}{2}\right)t\)

\(\\ \rm\rightarrowtail t=2\left(\dfrac{ln1000}{ln2}\right)\)

\(\\ \rm\rightarrowtail t=2\left(\dfrac{ln10^3}{ln2}\right)\)

\(\\ \rm\rightarrowtail t=2\left(\dfrac{3ln10}{ln2}\right)\)

\(\\ \rm\rightarrowtail t=2\left(\dfrac{6.9077552789821}{0.6931471805599}\right)\)

\(\\ \rm\rightarrowtail t=2(9.9657842846626)\)

\(\\ \rm\rightarrowtail t=19.9\)

\(\\ \rm\rightarrowtail t\approx 20s\)

The Earth, Sun, and Moon systems create several patterns, including the day and night cycle, seasons, lunar phases, tides, and solar and lunar eclipses. These patterns have been studied and understood by scientists for centuries and have played an important role in shaping our understanding of the universe and our place in it. Understanding these patterns is essential in comprehending the workings of the universe and the impact they have on our planet.

The Earth, Sun, and Moon systems create several patterns, including:

Day and Night cycle: The rotation of the Earth on its axis causes the alternating cycle of day and night as different parts of the planet face towards or away from the Sun.

Seasons: The tilt of the Earth's axis (23.5 degrees) causes the seasons to change as different parts of the planet receive varying amounts of sunlight throughout the year.

Lunar Phases: The Moon orbits the Earth, causing it to appear to change shape in the sky as different amounts of sunlight reflect off its surface.

Tides: The gravitational pull of the Moon and the Sun on the Earth's oceans creates a regular cycle of high and low tides.

Solar and Lunar Eclipses: The alignment of the Earth, Sun, and Moon can cause a shadow to be cast on one celestial body by another, resulting in either a solar or lunar eclipse.

These patterns have been studied and understood by scientists for centuries and have played an important role in shaping our understanding of the universe and our place in it.

Therefore, The day and night cycle, seasons, lunar phases, tides, and solar and lunar eclipses are just a few of the patterns that the Earth, Sun, and Moon systems produce. Scientists have been analyzing and studying these patterns for centuries, and they have had a significant impact on how we view the cosmos and our place in it. Knowing these patterns is crucial to understanding how the cosmos functions and how they affect our world.

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The current through the resistor 6.00 seconds after the switch is closed is approximately 151 μA. The charge on the capacitor 6.00 seconds after the switch is closed is approximately 6.001 μC.

A). Using Ohm's law: I = V / R

Substituting the given values:

I = ε / R

I = 15.1 V / 100,000 Ω

I ≈ 0.151 mA

Converted to μA: 0.151 mA * 1000 μA/mA = 151 μA

B). Q = \(Q_{max\) * (1 - \(e^(-t / RC)\))

Plugging in the values:

Q = (15.1 * 20.0 *\(10^(-6))\) * (1 - \(e^(-6.00\) / (100,000 * 20.0 * \(10^(-6))))\)

Using a calculator, we find:

Q ≈ 6.001 μC (rounded to three decimal places)

A capacitor is an electronic component that stores and releases electrical energy in an electrical circuit. It consists of two conductive plates separated by an insulating material called a dielectric. When a voltage is applied across the plates, an electric field is formed, causing positive charges to accumulate on one plate and negative charges on the other.

Capacitors have the ability to store electrical charge and release it when needed. They are commonly used in various electronic devices and systems for a range of purposes. Capacitors can be found in power supplies to smooth out voltage fluctuations, in timing circuits to control the flow of electrical signals, and in filters to block or pass certain frequencies.

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Answer:

silk-ties fabric

rubber-rubber bands

cellulose-jeans

starch-food and paper

dna-genetic

Explanation:

Adults typically have a resting heart rate between 60 and 100 beats per minute. A lower resting heart rate typically indicates improved cardiovascular fitness and more effective cardiac function.

Depending on the individual, a typical resting heart rate ranges from 60 to 100 beats per minute. Your heart can pump more blood with each contraction when it is healthy and functioning at a lower resting heart rate since it doesn't have to work as hard to keep a regular beat.

Your heart rate changes throughout the day depending on your degree of activity and your mood. While sleep can lower heart rate, stress and activity can boost it. When sleeping, a typical heart rate is frequently between 40 and 50 beats per minute (bpm),

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To determine the force and torque exerted by the player on the bat around an axis through point O, we need to consider the equilibrium condition.

Since the bat is in equilibrium, the net force and net torque acting on it must be zero.  The weight of the bat, which is 10.0 N, acts along a line 60.0 cm to the right of point O. Therefore, the force exerted by the player on the bat must be equal and opposite to the weight of the bat, which is 10.0 N.

To find the torque, we can use the formula: Torque = Force x Distance. The distance between the line of action of the force and the axis (point O) is 60.0 cm. Thus, the torque exerted by the player on the bat is 10.0 N x 60.0 cm = 600 N·cm.

In summary, the force exerted by the player on the bat is 10.0 N, and the torque exerted by the player on the bat around an axis through point O is 600 N·cm.

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5m/s² is the minimum acceleration of the body.

To determine the minimum acceleration of the body, we can use Newton's second law, which states that the force acting on a body is equal to its mass multiplied by its acceleration.

Given that two forces of 10N and 20N are acting on a body of mass 2kg, we can calculate the net force acting on the body as follows:

Net force = 20N - 10N = 10N

Now, we can use Newton's second law to calculate the minimum acceleration of the body:

Net force = mass x acceleration

10N = 2kg x acceleration

Rearranging the equation, we get:

Acceleration = 10N / 2kg

Acceleration = 5m/s²

Therefore, the minimum acceleration of the body is 5m/s².

It is important to note that this is the minimum acceleration because it assumes that the forces are acting in the same direction. If the forces were acting in opposite directions, the net force would be smaller and the acceleration would be less than 5m/s².

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Answer:

C

Explanation:

The electric force between two charged particles decreases by a factor of 4 if the distance between them is increased by a factor of 2. This is because the electric force is inversely proportional to the square of the distance between the charges. So, if the distance is doubled, the force is 1/4 as strong.

Thus, The answer is C.

Answer:

10 to 15 seconds

Explanation:

because I don't know but rarity is a strong force and it don't take long for a ball to come down

The forces exerted on a charge will be 3.75 N.The force acted on the charge due to the electric field.

The electric force between the two charges is directly propotional to the product of the charge and inversly propotional to the square of the distance between them.

The given data in the problem is;

F is the force exerted

q is the charge = 2.5 µc

\(\rm \alpha\) is the angle = 90°

B is the magnetic field = 3.0 × 10² T

v is the velocity = 5.0 × 103 m/s

Force on the moving charge is found as;

\(\rm F = q V B sin \alpha \\\\ F = 2.5 \times 10^{-6} \times 3 \times 10^{-2} \times 5 \times 10^3 \\\\ F=3.75 \ N\)

Hence the force exerted on a charge will be 3.75 N

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The speed of sound in water made by a torpedo with a speed of 20.00m/s and explodes upon impact with a target 2000.0m away is 19.72 m / s

v = d / t

v = Velocity

d = Distance

t = Time

d = 2000 m

t = 101.4 s

v = 2000 / 101.4

v = 19.72 m / s

Velocity of an object is the object's rate of change of position with respect to time. It is mostly denoted as m / s.

Therefore, the speed of sound in water is 19.72 m / s

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Answer:

through the vibration of particles

Explanation:

Energy is transferred in waves through the vibration of particles, but the particles themselves move in a perpendicular fashion to the horizontal movement of the wave.

One of the most significant observations that has provided the most accurate values of the age, dark matter, dark energy content, and the average density of the universe is the cosmic microwave background (CMB) radiation.

The CMB radiation is the afterglow of the Big Bang and is a remnant of the hot, dense early universe. The CMB radiation provides a snapshot of the universe when it was only 380,000 years old, and its properties can be analyzed to infer the universe's current state.

By analyzing the CMB radiation, cosmologists have determined that the universe is approximately 13.8 billion years old. Furthermore, they have found that dark matter constitutes around 27% of the universe's total energy density, and dark energy constitutes around 68%.

The CMB radiation has also provided insight into the universe's average density. By measuring tiny fluctuations in the CMB, scientists have determined that the average density of the universe is very close to the critical density required for a flat universe. This result is consistent with the inflationary Big Bang model and the concept of a flat universe.

Therefore, the observation of the cosmic microwave background radiation has been crucial in providing some of the most accurate values of the age, dark matter, and dark energy content, and the average density of the universe.

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Answer:

This equation for acceleration can be used to calculate the acceleration of an object when its mass and the net force acting on it are known.

so it wa The equation for the acceleration can be rewritten as to calculate the nets force acting on an object when its mass and acceleration

Answer: F=ma

Explanation:

Gas X, when held in a sealed chamber at STP, will have an approximate volume of 22.4 L.

At STP (Standard Temperature and Pressure), which is defined as 0 degrees Celsius (273.15 Kelvin) and 1 atmosphere of pressure, one mole of any ideal gas occupies a volume of 22.4 liters. This is known as the molar volume of a gas. It is a constant value that allows us to easily calculate the volume of a given amount of gas at STP.

The molar volume of 22.4 liters can be derived from the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. At STP, the pressure is 1 atmosphere, and if we assume we have one mole of Gas X, we can rearrange the equation to solve for V:

V = (nRT) / P

Substituting the values for STP (n = 1 mole, R = 0.0821 L·atm/mol·K, P = 1 atm, T = 273.15 K) into the equation, we get:

V = (1 mol * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm

 = 22.4 L

Therefore, the approximate volume of Gas X in a sealed chamber at STP is 22.4 L.

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Answer: 1350J

Explanation:

To solve this, we are going to use the formula for calculating potential difference which is:

Potential difference (V) = Work done (W) / Total charge (C)

Therefore,

9 volts = Work done / 150

Work done = 150 × 9 = 1350J

Momentum is a product of the mass and velocity of particles in motion while impulse is the rate of change of the momentum of particles/objects when a force acts on the object.

The impulse of the collision in system A is twice the impulse of the collision in system B

Impulse is given as J = F.dt

In case of impulse 1,

it is F(1-0.5) = 4* 0.5 = 2 Ns

In case of impulse 2,

it is = 2(2.5 - 1.5) = 2Ns

We saw that, both the impulses are calculated to be 2Ns.

Therefore, both the impulses in the graph are same.

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Answer:

Explanation:

In free fall, gravity constantly accelerates an object (increases its velocity)—until it hits terminal velocity. Specifically, gravity increases a falling object's velocity by 9.8 meters per second (m/s) with every passing second. (Whereas velocity is measured in m/s, acceleration is measured in meters per second squared, or m/s2.) How does this constant acceleration affect the distance that an object travels over time? In this experiment you will roll a marble down a ramp to find out.

By adjusting the ramp's height, width, or inclination, you can increase the velocity at which the marble travels down it.

As a tool for lifting or lowering a load, an inclined plane, sometimes referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other.

One of the six traditional simple devices that Renaissance scientists defined is the inclined plane. Heavy weights are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending an incline.

Less force is needed to push an object up an inclined plane than to lift it straight up, but the distance travelled is greater.

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Answer:

3g/cm³

Explanation:

Use the formula:

density = mass ÷ volume

Substitute (plug in) the values:

density = 3 ÷ 1 = 3g/cm³

Answer:

-10.8m/s^2

Explanation:

a=change in velocity/change in time

-27 m/s/2.5=10.8m/s^2

or if its not negative

27m/s/2.5=10.8m/s^2

Explanation:

zero.

when the speed (velocity) does not change, there is no acceleration (which means the measure about how much the speed or velocity changes).