A car has uniformly accelerated from rest to a speed of 25m/s after traveling 75m. What is its acceleration in m/s^2

The speed of the rolling ball having a kinetic energy of 98J and a mass of 4kg is 7m/s.

Kinetic energy is simply the energy a body possesses due to its motion;

It is expressed as;

K.E = 1/2 × m × v²

Where m is mass and v is the velocity of the body.

Given the data in the question;

Plug the given values into the Kinetic energy formular and solve for v.

K.E = 1/2 × m × v²

98kgm²/s²  = 1/2 × 4kg × v²

98kgm²/s²  = 2kg × v²

v² = 98kgm²/s² / 2kg

v² = 49kgm²/s²

v = √( 49kgm²/s² )

v = 7m/s

Therefore, the speed of the ball is 7 meters per second.

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Answer:

you havent given the full question

but im guessing momentum

momentum is the quantity of motion of a moving body, measured as a product of its mass and velocity or the impetus gained by a moving object.

Explanation:

as the child is pushed, it gathers momentum as its weight allows it be pushed forward, and the velocity is the speed driven by the amount of force the parent pushes on the child whilst they are swinging. The momentum is the result of this action

the equation that links these factors together are

p = mv

p = momentum

m = mass

v = velocity

hope i got it right ._.

Answer:

a

Explanation:

Answer:

its a because its the only thing not moving

Explanation:

Assuming the woman starts at rest, she descends the slide with acceleration a such that

(20.3 m/s)² = 2 a (42.6 m)   →   a ≈ 4.84 m/s²

which points parallel to the slide.

The only forces acting on her, parallel to the slide, are

• the parallel component of her weight, w (//)

• friction, f, opposing her descent and pointing up the slide

Take the downward sliding direction to be positive. By Newton's second law, the net force in the parallel direction acting on the woman is

∑ F (//) = w (//) - f = ma

where m = 77.0 kg is the woman's mass.

Solve for f :

mg sin(42.3°) - f = ma

f = m (g sin(42.3°) - a)

f = (77.0 kg) ((9.80 m/s²) sin(42.3°) - 4.84 m/s²) ≈ 135 N

Compute the work W done by friction: multiply the magnitude of the friction by the length of the slide.

W = (135 N) (42.6 m) ≈ 5770 N•m = 5770 J

Answer:

-5770 J

Explanation:

look above this lol

The wavelength of the given transverse wave is 8 cm and the amplitude is approximately 14 cm.

Wavelength of a transverse wave is the distance between two consecutive crests or troughs of the wave. Wavelength of a wave is inversely proportional to the  frequency and energy  of the wave.

The amplitude of a transverse wave is the distance from the base line to the top of the crest or to the bottom of the trough.It is directly proportional to the frequency of the wave.

For the given wave, the wavelength is 8 cm and the amplitude that is , the distance to the base line to the top of the peak is 14 cm.

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Answer:

101 J

Explanation:

Answer:

\(\boxed {\boxed {\sf 101 \ Joules}}\)

Explanation:

Kinetic energy can be found using the following formula:

\(KE=\frac{1}{2}mv^2\)

The mass of the baseball is 0.140 kilograms and the velocity is 38.0 meters per second.

\(m= 0.140 \ kg \\v= 38.0 \ m/s\)

Substitute the values into the formula.

\(KE=\frac{1}{2} [0.140 \ kg][(38.0 \ m/s)^2]\)

First, evaluate the exponent.

\(KE=\frac{1}{2}(0.140 \ kg)(1444 \ m^2/s^2)\)

Multiply the two numbers in parentheses together.

\(KE=\frac{1}{2}(202.16 \ kg*m^2/s^2)\)

Multiply the fraction by the number, or divide the number by 2.

\(KE=101.08 \ kg*m^2/s^2\)

Round to the nearest whole number. The 0 in the tenth place tells us we can leave the number as is.

\(KE\approx 101 \ kg*m^2/s^2\)

1 kg*m²/s² is equal to 1 Joule. Therefore, our answer of 101 kg*m²/s² is equal to 101 Joules (J).

\(KE\approx 101 \ J\)

The kinetic energy of the baseball is about 101 Joules.

The velocity of the particle at t = 2.04 s is 13.4848 m/s to the east.

What is the equation of motion?

Equations of motion are equations that describe a physical system's behavior in terms of its motion as a function of time. Equations of motion, The three equations of the motion are,

v - u = at

S = ut + 0.5(at²)

v² - u² = 2as

where

S is the distance,

u is the initial velocity,

v is the final velocity,

t is the time,

a is the acceleration.

To find the position and velocity of a particle at a specific time, we can use kinematic equations.

Given:

Initial velocity (v0) = 21.4 m/s (east)

Acceleration (a) = -3.88 m/s^2 (west)

Time (t) = 2.04 s

We can use the following equations of motion:

Position:

x = x0 + v0t + (1/2)at^2

Velocity:

v = v0 + at

First, let's calculate the position (x):

x = 0 + (21.4)(2.04) + (1/2)(-3.88)(2.04)^2

x = 43.6176 - 7.9552

x = 35.6624 m (east)

So, the position of the particle at t = 2.04 s is 35.6624 m to the east.

Now, let's calculate the velocity (v):

v = 21.4 + (-3.88)(2.04)

v = 21.4 - 7.9152

v = 13.4848 m/s (east)

Therefore, the velocity of the particle at t = 2.04 s is 13.4848 m/s to the east.

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The specific heat of the unknown substance with a mass of 0.158kg is 0.5478 J/g°C

HOW TO CALCULATE SPECIFIC HEAT CAPACITY:

The specific heat capacity of a substance can be calculated using the following formula:

Q = m × c × ∆T

Where;

According to this question, 2,510.0 J of heat is required to heat the 0.158kg substance from 32.0°C to 61.0°C. The specific heat capacity can be calculated:

2510 = 158 × c × (61°C - 32°C)

2510 = 4582c

c = 2510 ÷ 4582

c = 0.5478 J/g°C

Therefore, the specific heat capacity of the unknown substance that has a mass of 0.158 kg is 0.5478 J/g°C.

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In order to determine the probability that an electron can be detected in the middle one-third of a well region, we need to take into account the wave function and the boundary conditions.The wave function represents the probability density of finding the electron in a particular location within the well. The boundary conditions are determined by the geometry of the well, which can be rectangular, triangular, or other shapes.

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Increased lamp voltage is achieved by turning the light intensity dial.

To enlarge the diameter of the hole and let more light through the slide, the iris diaphragm was modified.

Condenser: Position it higher and closer to the slide's bottom to better direct light to the centre of the slide.

Utilize the brightness adjustment knob to change the brightness. Turn the brightness control knob while looking through the eyepieces to make sure there is no glare in the field of view.

Use a daylight balancing filter if your compound microscope has a certain sort of illumination. It typically rests directly on top of the luminator or in a filter holder above the light. This filter is blue.

The daylight balancing filter will correct the colour temperature and produce a higher-quality image if your microscope is lighted by tungsten or halogen (and a better colour image). This blue filter is not necessary if your microscope is an LED.

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(a) The tension in the cable slanted at an angle of 38° is 90.32 N.

(b) The tension in the horizontal cable is 71.2 N.

The net force on the weight is determined by resolving the forces into x and y components as follows;

Let the rightward tension = T₁

Let the leftward tension = T₂

Sum of the horizontal forces is calculated as follows;

T₁cos(38) - T₂cos(0)  - 56 cos(90) = 0

0.788T₁ - T₂ = 0

0.788T₁ = T₂

Sum of the Vertical forces is calculated as follows;

T₁sin(38) + T₂sin(0) - 56sin(90) = 0

0.62T₁  - 56 = 0

T₁ = 56/0.62

T₁ = 90.32 N

The tension in the horizontal cable is calculated as follows;

T₂ = 0.788T₁

T₂ = 0.788 x 90.32 N

T₂ = 71.2 N

Thus, the tension in each cable is determined by resolving the forces into various components as shown above.

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According to the given statement 5.24 m  far will the puck slide before stopping.

Sliding friction, commonly referred to as kinetic friction, develops when two surfaces rub against one another. The interlocking of surface imperfections causes kinetic friction.

Let m represent the puck's mass. Since Newton's law states that the net force acting on the puck in the vertical direction is ∑ F = n - mg = 0, the upward normal force produced by the ice has a value of n = mg.

Newton's second law states that the net horizontal force exerted on the puck as a result of the frictional force is f = 0.10mg.

∑ F = -f = ma

Solve for the acceleration a :

-0.10mg = ma

a = -0.10 (9.8 m/s²)

a ≈ -0.98 m/s²

The puck slides to a rest over a distance x such that, assuming constant friction

0² - (10 m/s)² = 2ax

Solve for x :

x = -(10 m/s)²/(2a)

x = -(10 m/s)² / (2 (-0.98 m/s²))

x ≈ 5.24 m

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Answer:

Fossils of what are thought to be filamentous photosynthetic organisms have been dated at 3.4 billion years old. More recent studies, reported in March 2018, also suggest that photosynthesis may have begun about 3.4 billion years ago.

Answer:

Overwhelming evidence indicates that eukaryotic photosynthesis originated from endosymbiosis of cyanobacterial-like organisms, which ultimately became chloroplasts (Margulis, 1992). So the evolutionary origin of photosynthesis is to be found in the bacterial domain.

Explanation:

ANSWER:

(a)

STEP-BY-STEP EXPLANATION:

The first thing is to make the force diagram to be able to determine the answer, just like this:

Therefore, in the y-direction, we can determine the value of the normal force as follows:

Answer:A compound is a substance formed when two or more elements are chemically joined.

Explation:Water, salt, and sugar are examples of compounds.

I hope this helps<3

Answer:

Explanation:

Density = mass / volume

density = 2.4

volume = 100 cm^3

2.4 = m / 100     Multiply both sides by 100

2.4 * 100 = m

m = 240 grams

The correct order of the Sun's layers from the center outward is e. core, radiative zone, convective zone, photosphere, chromosphere, corona.                                                                                                                                                                          

The chromosphere is the layer above the photosphere and below the corona. It is characterized by a reddish glow that is visible during a total solar eclipse.
The core is where nuclear fusion occurs, generating the Sun's energy. The radiative and convective zones transport this energy outward. The photosphere is the visible surface of the Sun, while the chromosphere is a layer above it, giving rise to solar phenomena. Finally, the corona is the Sun's outermost layer, characterized by its high temperature and plasma emissions.

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The minimum separation between the bees to resolve them as two distinct insects is approximately 1.22 times the wavelength of the visible light.

To determine the minimum separation between the bees, we can use the Rayleigh criterion. The Rayleigh criterion states that two objects can be resolved as distinct if the central maximum of one object's diffraction pattern falls on the first minimum of the other object's diffraction pattern. The formula for the angular separation (θ) is:

θ = 1.22 * (λ / D)

Where θ is the angular separation, λ is the wavelength of light (in this case, 470 nm or 4.7 x 10⁻⁷ meters), and D is the diameter of the aperture (such as a lens or an eye's pupil).

To find the minimum separation (d) between the bees in real space, we can use the formula:

d = L * tan(θ)

Where L is the distance between the observer and the bees. Since we don't know L, we can't provide an exact value for d. However, it's important to note that the minimum separation is directly proportional to the angular separation (θ) and depends on the wavelength of light and the diameter of the aperture used to observe the bees.

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Answer:

1. B

2. C

WELCOME!!

Explanation:

I have had the same thing for school and I got it correct :(

Changing the width of the slits in a double-slit interference experiment affects the intensity and the width of the interference pattern formed on the screen.

In a double-slit interference experiment, light passes through two narrow slits and creates an interference pattern on a screen. The pattern consists of alternating bright and dark bands called fringes. When the width of the slits is increased, the intensity of the bright fringes increases, while the width of these fringes decreases. This occurs because the light waves passing through the wider slits interfere more constructively, resulting in brighter fringes. Conversely, when the slit width is decreased, the intensity of the bright fringes decreases, and their width increases.

Altering the width of the slits in a double-slit interference experiment impacts the interference pattern by modifying the intensity and width of the fringes. Wider slits produce brighter and narrower fringes, while narrower slits result in dimmer and wider fringes.

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The correct option is option (c): In Atrial Tachycardia, the P waves are commonly seen as irregular or have a sawtooth pattern.

Atrial Tachycardia is a condition characterized by a rapid heart rate originating from abnormal electrical activity in the atria of the heart. In this condition, the P waves, which represent the electrical activity generated by the atria, can exhibit certain characteristic patterns. One common finding in Atrial Tachycardia is irregular P waves.

The irregularity occurs because the electrical signals responsible for generating the P waves are not originating from the sinus node, the normal pacemaker of the heart, resulting in a lack of consistent rhythm. Another common presentation of P waves in Atrial Tachycardia is a sawtooth pattern, known as "sawtooth flutter waves."

These waves have a distinct appearance, resembling a series of sharp peaks and valleys, which can be observed on an electrocardiogram (ECG). The irregular or sawtooth P waves in Atrial Tachycardia can help differentiate this condition from other types of tachycardia and aid in its diagnosis.

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Answer:

i think the answer is c if you get it wrong then it is b

Explanation:

Answer:

Your answer is: D) The book's inertia causes it to continue

Explanation:

Hope this helped : )

Answer:

Gravitational force between masses there is Gravitational force .

Answer:

The correct answer is: Energy is conserved, and it cannot be created or destroyed. This is known as the law of conservation of energy, which states that in a closed system, the total amount of energy remains constant and cannot be created or destroyed, only transformed from one form to another. This means that energy can be converted from one form to another, such as from potential energy to kinetic energy, but the total amount of energy in the system remains the same.

Answer:

Explanation:

actually , the acceleration due to gravity depends on the distance from it's center of the earth.

when the distance from the earth increases , the acceleration due to gravity decreases as a result . The value of gravity in space is zero.

Answer:

10

Explanation: