An object of mass m = 0.5 kg moves with initial speed v; = 5 m/s, then interacts with its environment, releasing 5.0 J of work. Calculate the speed of the object just after the interaction.

Answer:

Explanation:

First job is to convert 72 km/hr to m/s:

\(72\frac{km}{hr}\) × \(\frac{1000m}{1km}\) × \(\frac{1hr}{3600s}\) = 2.0 × 10¹ m/s

Now to find the acceleration which is

\(a=\frac{v_f-v_0}{t}\) and filling in:

\(a=\frac{2.0*10^1-0}{11.5}=1.7\frac{m}{s^2}\) That's part a. Part b want to know how far the car can get in 11.5 seconds (because that's the time it takes for the car to get to 72 km/hr). Since we know that the car can get 2.0 × 10¹ meters in 1 second, that means that in 11.5 seconds, the car can get 11.5(2.0 × 10¹) which is 230 meters.

Answer:

90.0 + 80 = 170

2 signifigant figures

1.70 x 10^2

One physical force that can change an object from one phase to the next is temperature. The phase of matter is determined by the arrangement and movement of its particles. As temperature changes, the average kinetic energy of the particles also changes, causing them to move faster or slower.

This change in movement can lead to a change in the arrangement of particles, which ultimately changes the phase of the matter.
For example, if a solid is heated, the particles gain energy and vibrate faster, causing the bonds between particles to weaken. Eventually, the bonds break, and the particles are able to move freely, resulting in a liquid phase. Similarly, if a liquid is cooled, the particles lose energy and move slower, causing the bonds between particles to strengthen. Eventually, the particles will become fixed in a rigid pattern, resulting in a solid phase.

Therefore, temperature can act as a physical force to change the phase of matter, and it is a fundamental concept in the study of thermodynamics and phase transitions.

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The use of microscope, pick up a prepared slide by its edges and place it on the microscope's stage. Once the slide is in position, clip it into place.

A microscope has a 1 cm focal length objective and a 6 cm focal length eyepiece. If the tube length is 30 cm and the image is formed at the shortest distance of discernible vision.

The focal lengths of the objective and eye lens in a compound microscope are 2.5 cm and 5 cm, respectively. When an object is placed 3.75 cm in front of the objective and an image is formed at the shortest distance of distinct vision, the distance between the two lenses is equal to the length of the microscopic tube. B. 13.00 cmA. 12.67 cm D. 11.67 cm C. 12.00 cm.

The objective eyepieces of an astronomical telescope have focal lengths of 40 cm and 4 cm, respectively. To observe an object 200 cm from the objective lens.

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The formula for the linear velocity v of a point on the edge of a disk is v = r x omega, where r is the radius of the disk and omega is the angular velocity. Therefore, the linear velocity of a point on the edge of the disk is 65.32 m/s.

Substituting the given values, we have:
v = 7.1 m x 9.2 rad/s
v = 65.32 m/s

To determine the linear velocity v of a point on the edge of the disk with a rotational inertia of 30 kg m², radius of 7.1 m, and an angular velocity of 9.2 rad/s, you can use the formula:
v = r * ω
where v is the linear velocity, r is the radius, and ω is the angular velocity.
Step 1: Plug in the given values:
v = 7.1 m * 9.2 rad/s
Step 2: Multiply the values:
v ≈ 65.32 m/s
So, the linear velocity of a point on the edge of the disk is approximately 65.32 m/s.

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Answer:

8.49673 minutes ≈ 8.5 minutes

Explanation:

Acceleration, a is defined as the rate of change in velocity divided by the change in time to attain that velocity

\(\mathsf a = \dfrac{\Delta v}{\Delta t} \\\\\textsf {where } \mathsf {\Delta v = v-v_0} \textsf{ v being final velocity and v_0 initial velocity}\), v = final velocity and v₀ the initial velocity
and Δt is the time required to attain final velocity

Δt = number of seconds since launch = t since t₀ = 0

Therefore,
\(a = \dfrac{v-v_0}{t}\)

The space shuttle's initial velocity is 0 m/s and its final velocity must be 7800 m/s to escape earth's gravity

So v - v₀ = 7800 - 0 = 7800 m/s, t - t₀ = t = 0 = t seconds
a = 15.3 m/s²

We have the equation

a = 7800/t

a is given as 15.3 m/s² so
15.3 = 7800/t

t  = 7800/15.3 = 509.80392 seconds

To convert to minutes, divide by 60
509.80392/60 = 8.49673 minutes ≈ 8.5 minutes

Answer:

250N

Explanation:

w = mg

m=25

g = 10

w=25x10

w=250

If a student is pulling on an object that has a mass of 25 kg across the floor. Assuming gravity to be 10 m/s², then the weight of the object would be 250 N , therefore the correct answer is option C.

It can be defined as the force by which a body attracts another body toward its center as the result of the gravitational pull of one body and another.

As given in the problem, a student is pulling on an object that has a mass of 25 kg across the floor. Assuming gravity to be 10 m/s2,

The weight of the object = 25 × 10

                                          = 250 N

Thus,  the weight of the object would be 250 N , therefore the correct answer is option C.

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Explanation:

Here, kinetic energy of the body, K.E=10 J

Height attained by the body, h=5 m

h=5m

When the body attains maximum height, its kinetic energy is converted into potential energy.

P.E=K.E

⟹mgh=10

⟹m= 10/gh

= m = 10/(10×5) =0.2 kg (taking the value g as 10m/s²)

Now, ½mv²=10

0.2×v²=20

v²=20/0.2

v²=100

v=√100

v=10m/s.

hope this helps you.

\(\huge \bf༆ Answer ༄\)

Let's solve ~

As we know the total energy [P.E + K.E = C] of the system remains constant throughout the motion,

So, When a stone was thrown initially it didn't had any potential energy (P.E = 0) but had kinetic Energy of 10 joules.

So, total energy = P.E + K.E = 0 + 10 = 10 joules

As per the given information, equate it with the formula.

Now, As it approaches 5m height it comes to rest, Therefore velocity = 0. And since velocity = 0 then Kinetic Energy = 0

Now, let's find the Potential Energy at that point ~

And here, the Total energy = P.E + K.E = 10 Joules

So,

Therefore, mass of the object is 0.2 kg = 200 grams

Now, plug the value of mass (m) in the equation of kinetic Energy to find the initial velocity of the stone ~

Hence, velocity of the particle at the beginning was 10 m/s

Answer:

196000000 J

Explanation:

Potential Energy: This can be defined as the energy of a body due to its position in the gravitational field.

From the question,

P.E = mgh.................. Equation 1

Where P.E = potential Energy, m = mass of the water, h = height, g = acceleration due to gravity.

Given: m = 100 tonnes = (100×1000) = 100000 kg, h = 200 m

Constant: g = 9.8 m/s²

Substitute into equation 1

P.E = 100000(200)(9.8)

P.E = 196000000 J.

Note: When a object falls through a height he losses its potential energy.

Hence the potential energy lost = 196000000 J = 196 MJ.

Measurements of one Paramecium cell performing the barium dance show that it is moving to the left at 100 μm/s before adding barium, the average acceleration of the cell is 20 μm/s².

The formula for average acceleration can be used to get the cell's average acceleration:

\(\[ \text{Average Acceleration} = \dfrac{\text{Change in Velocity}}{\text{Time Interval}} \]\)

Given values:

Initial velocity (\(\(v_i\)\)) = 100 μm/s (to the left)

Final velocity (\(\(v_f\)\)) = 200 μm/s (to the right)

Time interval (t) = 5 seconds

The change in velocity is the difference between the final velocity and the initial velocity:

\(\[ \text{Change in Velocity} = v_f - v_i \]\)

Substitute the values:

\(\[ \text{Change in Velocity} = 200 - 100 \\\\= 100\)

Now, plug this into the formula for average acceleration:

\(\[ \text{Average Acceleration} = \dfrac{\text{Change in Velocity}}{\text{Time Interval}}\\\\ = \dfrac{100 }{5 }\)

= 20 μm/s².

Therefore, the average acceleration of the cell is 20 μm/s².

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Answer:

A) Gravity.

Explanation:

Earth is stuck in orbit around the sun, because of the Sun's gravitational pull. In this scenario, the string represents gravity, keeping the Earth attracted towards the sun.

Hope this helps! Feel free to give me Brainliest if you feel this helped. Have a good day and good luck with your assignment :)

The student ties a string around a weight and swings the weight in a circle around her body. If the student represents the sun and the weight represents earth, the string will represent GRAVITY then.

In mechanics, gravity—also known as gravitation—is the constant force of attraction that pulls all things together. It has little impact on determining the intrinsic characteristics of common stuff because it is by far the weakest known force in nature.

In contrast, it governs the formations and evolution of stars, galaxies, and the entire cosmos by its extensive and ubiquitous action, which affects the trajectories of objects in the solar system and beyond the universe. All objects on Earth experience weight, or a gravitational pull that is proportionate to their mass and is imposed by the planet's mass.

As the student represents the sun and the weight represents earth, the string will represent GRAVITY then. Hence, option (A) is correct.

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An Electron will undergoes the lesser acceleration

An electron is a negatively charged particle of equivalent magnitude to a proton, which is positively charged. Therefore, they will feel the same amount of electric force when exposed to an electric field. As a result, the relationship between acceleration and mass will be inverse. An electron will accelerate more quickly than a proton because an electron has a lower mass.

Due to their opposite polarity, an electron and a proton are attracted to one another by an electrical force of equal strength when they are placed in an electric field. However, because of their opposing charges, the force will act in the opposite direction.

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The length of the rubber band that the boy must use is 0.024 m or 24 mm.

To determine the length of the rubber band, we can use the formula for the potential energy stored in a stretched spring, which is also applicable to a stretched rubber band:

where U is the potential energy stored in the rubber band, k is the spring constant (or in this case, the rubber band constant), and x is the displacement of the rubber band from its natural length.

Since the rubber band is stretched by 0.25 of its natural length, the displacement x is 0.25 times the natural length of the rubber band.

We can solve for the rubber band constant k by using the formula for the velocity of a projectile launched by a spring (or in this case, a rubber band):

where v is the velocity of the projectile, m is the mass of the rubber band, M is the mass of the projectile, and k is the spring constant. We can rearrange this equation to solve for k:

k = (v² M) / (2 m)

We can now combine the two equations to solve for the length of the rubber band, L:

U = 1/2 k x²

U = 1/2 ((v² M) / (2 m)) (0.25 L)²

U = (v² M L²) / (32 m)

The potential energy stored in the rubber band must be equal to the kinetic energy of the projectile when it is launched:

U = 1/2 M v²

(v² M L²) / (32 m) = 1/2 M v²

L = ((16 m v²) / (k M))

L = ((16 m v²) / ((v² M) / (2 m) M))

L = √(32 m^2 / M)

L = (0.032 M)

Substituting the given values, we get:

L = √(0.032 * 0.006)

L = 0.024 m

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Answer:

The mechanical advantage of the wheelbarrow is the product of the mechanical advantage of the lever, and the mechanical advantage of the wheel and axle. Therefore, the wheelbarrow has a mechanical advantage of 4.

hope this helps :D

Explanation:

the speed of sound depends on the particles of the medium of the sound wave is moving through because the particles in the solid and tightly packed together South Wales weekly transfers energy from particle to particle in a solid

To solve this problem, we need to use the fact that the weight lifted by the hot-air balloon is equal to the weight of the air displaced by the balloon. We can use the following formula to find the volume of the balloon:

Volume of balloon = Weight lifted / Density difference between hot air and outside air * gravitational acceleration

We are given the weight lifted by the balloon, which is 6453 N. The density of the outside air is 1.205 kg/m^3, and the density of the hot air inside the balloon is 0.9671 kg/m^3. The gravitational acceleration is 9.81 m/s^2.

Substituting these values into the formula, we get:

Volume of balloon = 6453 N / (1.205 kg/m^3 - 0.9671 kg/m^3) * 9.81 m/s^2
Volume of balloon = 6453 N / 0.238 kg/m^3 * 9.81 m/s^2
Volume of balloon = 22131.633 m^3

Therefore, the volume of the balloon is 22131.633 m^3.

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We are given that a sphere Z moves with a relative speed of 1 m/s with respect to sphere X which moves at 5 m/s. Let's draw the velocity vectors of the spheres:

Where:

From the relative velocity equation we have:

Where:

Since we are given the relative velocity we can plug in the values to get the velocity of "z":

Now, we do the same but now using the sphere Y:

Now, we use the relative velocity equation for these velocities:

In this case, we have that:

Now, we subtract the velocity of "y" from both sides:

Substituting the values:

Solving the operations:

Therefore, the velocity of "Z" relative to "Y" is 4 m/s.

The magnitude of the induced emf near the center of the solenoid is 0 V/m.

The given parameters;

number of turns of the solenoid, N = 700 turns/m

the solenoid's current, I = 48 A/s, 

the wire's radius, r = 2.5 cm

The size of the induced emf near to the solenoid's center is calculated using the formula below:

B = µnI

dB/dt = µn*dI/dt

dB/dt = 0.032 T/s

Because of changes in the magnetic flux passing through a coil, a potential difference is created in the coil. To put it another way, it is claimed that electromotive force, or EMF, is created when the flux connecting with a conductor or coil changes.

\(E =\frac{r}{2} \frac{dB}{dr} \\\\E = \frac{0}{2} * (0.032) =0\)

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The information provided states that the magnetic field vector is tilted towards the +x direction, but its magnitude remains the same.

Based on this information, we can determine the direction of any induced current using Faraday's law of electromagnetic induction.
According to Faraday's law, when there is a change in magnetic flux through a loop of wire, an induced current is generated in the wire. The direction of the induced current is such that it opposes the change in magnetic flux.
In this case, since the magnetic field vector is tilted towards the +x direction, the change in magnetic flux through the loop would be a decrease. To oppose this decrease in magnetic flux, the induced current would generate its own magnetic field that tries to maintain the original magnetic field.
Using the right-hand rule, if we place our right hand with the thumb pointing in the direction of the original magnetic field (which is now tilted towards the +x direction), the induced current would circulate in the counterclockwise direction around the loop.
Therefore, the correct answer is:
b. The induced current is counterclockwise.

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The answer is D. distance between trough and crest. Wavelength is the distance between two consecutive points of the same phase on a wave, such as two adjacent crests, troughs, or zero crossings.

Wavelength is the distance between two consecutive points of the same phase on a wave, such as two adjacent crests, troughs, or zero crossings. So the answer is the distance between the trough and crest.

The other options are incorrect. Option A is the length of time the wave has been in motion, which is not the same as wavelength. Option B is the distance between the trough and the trough, which is half of the wavelength. Option C is the distance between the quiet water level and the crest, which is not a physical measurement of the wave.

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You have already plotted the graph.

Solving unsolved one

#d

One result is anamolous

That's

This is because

Answer:

\(\mu= 0.25\)

Explanation:

Given data

Force= 10N

mass= 4kg

r= 4*9.81

r= 39.24N

The expression for the force acting is expressed as

\(F=\mu*r\)

substitute

\(\mu=F/r\)

\(\mu= 10/39.24\)

\(\mu= 0.25\)

The minimum value of the coefficient of static friction in order for the block to remain motionless is 0.26.

Given the following data:

Scientific data:

To determine the minimum value of the coefficient of static friction in order for the block to remain motionless:

Note: The force that is required to make the block motionless must be lesser than or equal to the force of static friction.

Mathematically, the force of static friction is given by the formula;

\(Fs = uFn = umg\)

Where;

Making u the subject of formula, we have:

\(u=\frac{F_s}{mg}\)

Substituting the given parameters into the formula, we have;

\(u=\frac{10}{4.0 \times 9.8} \\\\u=\frac{10}{39.2}\)

u = 0.26

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Answer:

4 miles per hour

Explanation:

Your welcome

The metaphor (object) that shows how Aristotle's Three Artistic Proofs hold up one's argument is a stool. The correct option is 1.

The Three Artistic Proofs are Aristotle's fundamental concepts of argument that build a convincing case when utilized together:

Ethos: It is the ethical appeal; it establishes credibility with an audience.

Pathos: This refers to the emotional appeal; it appeals to the audience's emotions and sentiments.

Logos: It is the logical appeal; it uses reasoning and logical argument to persuade and convince the audience.

The metaphor (object) that shows how Aristotle's Three Artistic Proofs hold up one's argument is a stool. A stool is a three-legged object that can stand on its own with each leg equally supporting the weight. It is like the three artistic proofs, which are required in a good argument to hold it up. Without one of the three legs, the stool would be unstable and would fall apart. This metaphor is commonly used to explain how the three artistic proofs work together to build a convincing case. Option 1.

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Answer:

2 to 4 hours

Explanation:

Given that,

Microbial food infections

We know that,

Food infection :

When we eat old food, uncooked, fermented food, more junk food and contaminated food then 2 to 4 hours after eating we started vomiting, headache then we affected by food infections.

So, we can say that microbial food infections are usually not seen until 2 to 4 hours after eating contaminated food.

Answer:

Length of Orbit

Explanation:

The surface temperatures decreases with increasing distance from the sun. Venus is an exception because its dense atmosphere acts as a greenhouse and heats the surface to above the melting point of lead, about 880 degrees Fahrenheit (471 degrees Celsius).

Hopefully this helps!

Answer:

Explanation:

The energy possessed by a moving object is called kinetic energy.M=1kgV=2m/sKe= 1/2MV^2Ke=1/2×1×(2)^2Ke =2 joules

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.