an unwary football player collides with a padded goalpost while running at a velocity of 7.60 m/s and comes to a full stop after compressing the padding and his body 0.480 m. (a) what is his deceleration in m/s2? (enter the magnitude.) m/s2 (b) how long in seconds does the collision last?

Answer:

0.00789pa

Explanation:

since pressure=force/area

=400/0.5

=800N/m2

1.013*10^5N/m2=1pascal

800N/m2=xpascal

therefore it becomes,800/1.013*10^5

=0.00789pascal

Given, Mass of the object, m = 100 grams = 0.1 kg. Therefore, the speed of the object as it passes through the equilibrium position is 0.31 m/s. The answer is 0.31 m/s.

Displacement from the equilibrium position, x = 10 cm = 0.1 m, Time period, T = 2 seconds(a) To find the speed of the object as it passes through the equilibrium position, we need to find its maximum speed. We know that the time period, T = 2π √(m/k)where k is the spring constant of the spring. k = 4π²m/T² = 4π² × 0.1/2² = 0.98 N/m, The force exerted on the object, F = kx = 0.98 × 0.1 = 0.098 N. When the object passes through the equilibrium position, all the potential energy is converted into kinetic energy. Therefore, the kinetic energy at the equilibrium position is K.E = 1/2 mv²where v is the velocity of the object. So, equating the potential energy with kinetic energy,1/2 kx² = 1/2 mv²v = x √(k/m) = 0.1 √(0.98/0.1) = 0.31 m/s.

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Answer: Comparing infrared and ultraviolet, ''we can say that infrared has longer wavelength and lower photon energy''

At the time when infrared and ultraviolet is compared so it has longer wavelength and lower photon energy.

It should be lie between the visible and microwave portions of the electromagnetic spectrum. Infrared waves contain wavelengths more than than ultraviolet radiation. And the frequency of Infrared radiation should be lower as compared to the ultraviolet radiation. Also, the photon energy of the light should be proportional to the wave frequency.

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Answer:

Inertia.

Explanation:

Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.

In physics, Sir Isaac Newton's first law of motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.

For example, the inertia of an object such as a shopping cart is greatly dependent or influenced by its mass; the higher quantity of matter in a shopping cart, the greater will be its tendency to continuously remain at rest.

Answer:

Chocolate is poisonous to dogs mostly because of its theobromine content, which dogs are unable to metabolize effectively. If your dog eats chocolate, you should monitor them closely and seek veterinary attention if they show any symptoms, or if they are very young, pregnant or have other health concerns.

Explanation:

While this depends on the type of chocolate, it can take only 0.3 ounces of concentrated chocolate per pound of body weight to kill a dog. Milder types of chocolates vary from 0.5 to 2 ounces. This is because chocolates contain theobromine, which is a lethal chemical for dogs.

Symptoms of chocolate poisoning will usually show within six to 12 hours, but could appear within one hour. If you know your dog has eaten chocolate, act immediately and don't wait for the signs to appear. We always recommend seeking veterinary advice if you have any concerns about the health of your pets.

Yes, chocolate is toxic to dogs. While rarely fatal, chocolate ingestion can result in significant illness. Chocolate is toxic because it contains a chemical called theobromine, as well as caffeine.

The high level of theobromine in dark chocolate means it takes only a very small amount to poison a dog. Less than an ounce of dark chocolate may be enough to poison a 44-pound dog. Cocoa, cooking chocolate and dark chocolate contain the highest levels, while milk chocolate and white chocolate have the lowest.

Eventually, the dog may develop convulsions and die. In the majority of cases, the symptoms occur within a few hours, but it has been known to be delayed for as long as 24 hours. It can take as long as three days for the dog to recover completely.

ik its late but i hope this helps

Analy4life

Answer:

Chocolate can be toxic to dogs because it contains a substance called theobromine, which is similar to caffeine. While humans can easily metabolize theobromine, dogs metabolize it much more slowly, which can lead to a buildup of the toxin in their system. Theobromine can cause a variety of symptoms in dogs, including vomiting, diarrhea, increased heart rate, seizures, and even death in severe cases.

The severity of the symptoms depends on the amount of chocolate ingested, as well as the size and weight of the dog. Dark chocolate, baking chocolate, and cocoa powder contain higher levels of theobromine than milk chocolate or white chocolate, so they are more dangerous to dogs. As a general rule, it's best to keep all types of chocolate away from dogs, and to seek veterinary care immediately if you suspect your dog has ingested chocolate.

Answer:

Hi there!

Your answer is;

345,600 mins per 240 days

Explanation:

First, start small

How many minutes are in one hour?

60mins per 1 hr

How many minutes per one day?

60 × 24= 1440

1440 mins per 1 day

How many minutes per 240 days?

1440× 240= 345600

345,600 mins per 240 days

Hope this helps

Race takes 14 seconds to complete.

We need to use the equation of motion:

d = vt

where d is the distance covered, v is the speed, and t is the time.

Let's assume that the hare covers a distance of x before it stops to rest, and the tortoise covers a distance of y in the same time. Since the hare is faster, it covers more distance than the tortoise before stopping to rest, so we can write:

\(x = 3.0 m/s * t\)

\(y = 0.15 m/s * t\)

After resting for 2.0 minutes or 120 seconds, the same as the distance the tortoise has to cover to win the race. Let's call this distance z.

We can write:

\(z = x - 0.35 m\)

\(z = y\)

\(3.0 m/s * t - 0.35 m = 0.15 m/s * t\)

Solving for t, we get:

\(t = 14 s\)

Therefore, the race takes 14 seconds to complete.

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Answer:

Tin fork and knife.....Copper coin...steel pole

Explanation:

Malleable objects are those which could be shaped with out breaking or could be turned into wires. Tin fork and knife could be bent so it is malleable, copper could be turned into wires so it is also malleable. Most of the metals are malleable. Mild Steel is used in making poles and pipes which is malleable

Answer:

A C F or tin fork and knife from camping set

steel pole fence post

copper coin

Explanation:

I got it right on edg

                                                    hope it helps :)

Answer:

i did this project where i took two marbles pool noodles and tape then i made a ramp and i saw which marble would go down faster the big marble or the little marble hope this helps!!

Answer:

1.27551m

Explanation:

This is a simple energy convertion problem. Since there is no friction, and assuming no air drag and other external factors, mechanical energy should be conserved in this system.

Thus, we get:

\(KE_{initial} + PE_{initial} = KE_{final} + PE_{final}\)

We also know that the gravitational potential energy is equal to mgh, while the KE can be calculated using \(\frac{1}{2}mv^2\)

One thing to note here, is that the final KE will be 0, as there is no velocity at the end. Furthermore, we also can set the initial PE as 0 as we are looking at relative height, and at the start it is at h=0.

\(KE_{initial} = PE_{final}\)

Plugging in:

\(\frac{1}{2}*30*5^2 = 30*9.8*h\)

Solving for h, we get 1.27551m

Answer:

Answer in below and plz mark me as brainlist plz

Explanation:

The rate of change of momentum =tm(v−u) Rate of change of momentum = force applied. Force∝tm(v−u) Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Impulse is a change in momentum

The rate of change of momentum =tm(v−u) Rate of change of momentum = force applied. Force∝tm(v−u) Velocity is the rate of change of displacement and acceleration is the rate of change of velocity. Impulse is a change in momentum

To find the wavelength of the wave along the string, we first need to measure the distance between two consecutive points on the wave that are in the same phase.

We can look at the graph provided by the question, whose full cycle of the wave completes in 0.1sec, i.e. demonstrating that this is a complete up and down movement of the point.

As measured in the graph, we see that the distance between two consecutive points is 0.5 cm. Then we calculate the wavelength of the wave using the following formula:

Therefore, the wavelength of the wave corresponds to 0.005m.

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Option B,C and D shows the three ways does the pattern seen on the screen during a double-slit experiment.

The double-slit experiment shows that light and matter may have properties that are both conventionally defined waves and particles, as well as the essentially probabilistic nature of quantum mechanical processes.

The three ways does the pattern seen on the screen during a double-slit experiment support the wave model of light;

B. The light bends around the edges of the slit.

C. There are bands of dimmer light.

D. There are bands of brighter light.

Hence, B,C and D are the three ways does the pattern seen on the screen during a double-slit experiment.

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The torque experienced by a magnetic dipole moment M placed with its axis at angle theta with a uniform magnetic field B is τ = MB sin θ

Torque = Force * Perpendicular distance

F = m * B

F = Force

m = Magnetic pole strength

B = Magnetic field

τ = Torque

τ = m * B * 2 * l * sin θ

Magnetic dipole moment, M = 2 * m * l

τ = ( 2 * m * l ) * B * sin θ

τ = M B sin θ

Therefore, the torque experienced by a magnetic dipole moment M placed with its axis at angle theta with a uniform magnetic field B is τ = MB sin θ

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Water, glass, and diamond are three examples of materials that do this. These materials slow down the speed of light rays as they enter them while they are in the air.

Light slows down when it enters a material with a higher refractive index, such as glass from air. When facing the straight line, the light sways. Light moves more quickly when it enters a medium with a lower refractive index, as air from water.

Yes. Transparent materials like air, water, and glass slow down light. The refractive index of the medium, which is always greater than 1, is the ratio by which it is slowed.

The angle of refraction increases with increasing speed change. As an illustration, light refracts differently when it travels from air to diamond than when it travels from air to water. This is because of the fact that light travels more slowly in diamonds than it does in water.

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Answer:

The covered distance was 1800 [m]

Explanation:

In order to solve this problem we must use the following formula of kinematics. It is important to make it clear that Branden's speed never changes during that time, or therefore the speed is constant.

\(x = x_{o}+v*t\\\)

where:

x = distance [m]

Xo = initial position = 0

v = velocity = 6 [m/s]

t = 300 [s]

Now replacing we have:

x = 0 + (6*300)

x = 1800 [m]

Answer:

A

Explanation:

Use the conservation of energy formula to calculate the velocity of the ball when it reaches the halfway point (10m down). Then, use your calculated value to obtain the kinetic energy.

Answer:

A. 49 on Plato

Explanation:

Its the right one trust me .

Answer:

180 m/s

Explanation:

To find the answer you simply divide 900 by 5.

Two instruments based on Archimedes' principle

Explanation:

Archimedes' principle states -

OR

Applicatios : Lactometer , hydrometer.

Answer:

\(\huge\boxed{\sf m = 2 \ moles}\)

Explanation:

No. of particles = 12.04 × 10²³ particles

Avogadro's number = 6.02 × 10²³

No. of moles = n = ?

\(\displaystyle No. \ of\ moles\ = \frac{no.\ of \ particles}{Avogadro's \ number}\)

Put the given in the above formula

\(\displaystyle n =\frac{12.04 \times 10^{23}}{6.02 \times 10^{23}} \\\\n = 2 \times 1 \ moles\\\\m = 2 \ moles\\\\\rule[225]{225}{2}\)

The skateboard that has the greatest impulse is Skateboard C (Impulse = 25.74 Ns)

From the question,

We are to determine which skateboard has the greatest impulse. To do this, we will calculate the impulse of each skate board.

Impulse can be calculated by using the formula

I = Ft

Where I is the impulse

F is the force

and t is the time

Force = 33 N

Time = 0. 12 s

∴ Impulse = 33 × 0.12

Impulse  = 3.96 Ns

Force = 33 N

Time = 0. 57 s

∴ Impulse = 33 × 0.57

Impulse = 18.81 Ns

Force = 33 N

Time = 0. 78 s

∴ Impulse = 33 × 0.78

Impulse = 25.74 Ns

Hence, the skateboard that has the greatest impulse is Skateboard C (Impulse = 25.74 Ns)

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Answer:

Skateboard C has the greatest impulse of the three.

Explanation:

Answer:

500kg

Explanation:

mass = newtons/force divided by the acceleration rate

m = 30,000/60

m = 500

The force F1 is equal and opposite to the downward force thus, F1 is equal to 60 N. The force F2 is inclined to 30 ° from leftward force and it is equal to 38.97 N in magnitude.

Force is an external agent acting on a body to deform it or to change its state of motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction.

If two forces acting on a body from the same directions, then the net force will be the sum of these two forces. If they are acting from opposite directions, they will cancel each other in magnitude.

The force F1 is equal and opposite to the force acting downward. Thus its magnitude is 60 N. The force F2 is inclined to 30 ° from horizontal direction.

F2 = 45 cos 30 = 38.9 N.

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Answer:

its c - the migration of birds

Explanation:

i did it on study island

Answer:

He is pink panther. How nerdy does he sound?

Explanation:

Hotter is Star X. Ionized helium lines are highest at high temperatures (> 30,000 K), whereas titanium oxide lines are brightest at low temperatures (3000 K), according to the study Absorption Lines in Stars of Different Temperatures. Star X must therefore be hotter than Star Y. A higher amount of electron excitation.

The creation of excimers are two other methods of making helium reactive. Helium that has been ionized (He+), also referred to as He II, is a very high energy substance capable of removing one electron from any other element. One electron only exists in a single, ionized helium atom.

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The rms voltage developed in secondary coil is 971.42 volt.

\(\frac{V2}{V1}=\frac{N2}{N1}\)

V2= 2000 x 170/350=971.42 volt

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Answer:

La materia es la sustancia de la que está hecho todo material. En física, el sistema es una de las propiedades de la materia. Se puede transferir entre objetos y convertir en forma. No se puede crear ni destruir.

espero que te ayude!