object 1 has a momentum of 5 kg*m/s before colliding with object 2 which has a momentum of -3 kg*m/s before the collision. after they collide, object 1 immediately stops. what is the momentum of object 2 after the collision?

Answer:

Speed greater than 4 m/s

Explanation:

Given that Ms. Kasper is in a panic. Her cat, Penny, is stuck in a tree and about to jump out. In order to save her cat, Ms. Kasper needs to run to the tree, 12 meters away. If it takes her cat, 3 seconds to fall, how fast would Ms. Kasper have to run to save her cat?

The distance = 12 m

Time = 3s

Speed = distance/time

Speed = 12/3

Speed = 4 m/s

Ms Kasper must run at speed more than 4m/s for her to save the cat.

The Height of the roof is 225 feet .

Calculation :

y = h - gt2/2 = 0;

h = gt2/2;

v(t) = dy/dt = - gt;

t = - v(t)/g;

h = g/2·v2(t)/g2

= v2(t)/(2g)

= 120²ft2/s²/(2·32ft/s²) =

225 ft

In mathematics, height is defined as the vertical distance from top to bottom of an object. Also called "height". The term geometry height refers to the measurement of an object along the coordinate geometry's y-axis.

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The magnitude of the electric field at a position 1.2 m from the point charge is approximately 2.91 x 10^-6 N/C. The correct option is a.

To find the magnitude of the electric field at a distance of 1.2 m from a point charge, we can use Coulomb's Law. Coulomb's Law states that the magnitude of the electric field (E) created by a point charge (Q) at a distance (r) is given by the equation:

E = k * (Q / r^2)

where k is the electrostatic constant (k ≈ 9 x 10^9 N m^2/C^2).

Substituting the given values into the equation, we have:

E = (9 x 10^9 N m^2/C^2) * (4.2 x 10^-6 C) / (1.2 m)^2

Calculating this expression, we get:

E ≈ 2.91 x 10^-6 N/C

Therefore, the magnitude of the electric field at a position 1.2 m from the point charge is approximately 2.91 x 10^-6 N/C. Thus, option (a) is the correct answer.

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The fraction of the substance remaining is 6.25%.

The amount of substance left is calculated as follows;

N = N₀(1/2)^(t/T)

where;

T is the half-life of the substance,

we have;

N₀ = 100g,

T = 5670 years, and

t = 22680 years

N = 100 x (1/2)^(22680/5670)

N = 6.25 g

The fraction remaining is calculated as follows

fraction remaining = N/N₀

fraction remaining = 6.25/100

fraction remaining = 0.0625 or 6.25%

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The pressure exerted by a box on the ground can be calculated by dividing the force exerted by the box on the ground by the area of the base of the box.

The force exerted by the box can be calculated using Newton's second law, which states that force (F) is equal to the mass (m) of an object multiplied by its acceleration (a). In this case, the mass of the box is given as 40 kg. Since the box is at rest on the ground, the acceleration is 0. Therefore, the force exerted by the box is 0 N.

To calculate pressure, we need to convert the force from newtons to kilogram-force. Since 1 kg-f = 10 N, the force can be expressed as 0 N / 10 = 0 kg-f.

The pressure exerted by the box on the ground is calculated by dividing the force by the area of the base of the box. The area is given as 10 m^2. Therefore, the pressure exerted by the box on the ground is 0 kg-f / 10 m^2 = 0 kg-f/m^2.

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Answer:

IMA = 2.5 metres

EFFICIENCY = 80%

Explanation:

The AMA of a machine is referred to as the Actual Mechanical Advantage of a machine, calculated as the ratio of the output to the input force.

The Ideal Mechanical Advantage is the ratio of the input distance to the output distance.

From the diagram, the input distance which is also the distance moved by effort  = 5metres

The load distance (output distance) = 2 metres

IMA = INPUT DISTANCE / OUTPUT DISTANCE

IMA = 5metres / 2 metres = 2.5 meters

Efficiency is the ratio of AMA TO IMA

AMA = 2, IMA = 2.5

EFFICIENCY = AMA / IMA

EFFICIENCY = (2 / 2.5) × 100%= 0.8 × 100%

EFFICIENCY = 80%

Field strength is 0.03234 N/kg. The formula to determine the field strength is given by:

F = mg Here, F is the field strength, m is the mass, and g is the gravitational field strength.

Substituting the values given: Weight = 0.96 N Mass = 3.3 g = 0.0033 kg = 9.8 m/s² Therefore, F = mg = 0.0033 kg × 9.8 m/s² = 0.03234 N the field strength is the gravitational force acting on a unit mass. It is measured in newtons per kilogram. The field strength is an expression of the strength of a gravitational field. In this case, the mass of the object is 3.3 g, which can be converted to kilograms by dividing by 1000.

The weight of the object is given as 0.96 N. Using the formula

F=mg, where m is the mass and g is the gravitational field strength, we can calculate the field strength as 0.03234 N/kg.

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Answer:

divide work by time

Explanation:

Power=work/time.

Answer:

divid work by time

Explanation:

Answer:

The capacitor helps to store data even after the battery is removed

Explanation:

The cell phone is fitted with different types of capacitors, which come in all shapes and sizes. However they come, their main function is to store charges within them, and dissipate these charges when necessary.

This serves a great purpose in the printed circuit boards of phones as they provide the power needed for data to be stored even when the battery of the phone is removed.

A capacitor is a solid-state device because it has no moving part. It just stores charges within its parallel plates for the phone until the power is needed.

The gravitational force between the two objects is weak because their masses are small. The correct option to this question is D.

When the mass of either object doubles, the gravitational force between them doubles. If the mass of either object triples, the gravitational force between them triples. If the masses of both objects double, the gravitational force between them quadruples. etc

The gravitational force between two bodies of mass 1 kg at a distance of 1 m is:6.67N

As the two masses move, the value of G in Newton's law of universal gravitation is constant and does not change. Bringing two masses closer together increases the gravitational force between them, but never changes the value of G.

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Out of the given options, sandpaper would have the highest friction.

• Wooden surface: Depends on the smoothness of the wood, can range from low to medium friction.

• Glass surface: Very smooth so it has low friction.

• Paper surface: Relatively smooth so friction would be low to medium depending on the paper type.

Given the following information:Mass of the system, m = 20 kg.Damping coefficient, b = 6 Ns/m.Force, F = 90 N.Frequency of applied force, f = ?Applied force angular frequency, w = 6 rad/s.Forced vibration equation:F(t) = F0 sin(wt)where F0 = 90 N and w = 6 rad/s.Under the action of the force F, the mass m will oscillate.The equation of motion for the mass-spring-damper system is given by:$$\mathrm{m\frac{d^{2}x}{dt^{2}}} + \mathrm{b\frac{dx}{dt}} + \mathrm{kx = F_{0}sin(\omega t)}$$where k is the spring constant.x(0) = 0 and x'(0) = 0.As we have the damping coefficient (b), we can calculate the damping ratio (ζ) and natural frequency (ωn) of the system.Damping ratio:$$\mathrm{\zeta = \frac{b}{2\sqrt{km}}}$$where k is the spring constant and m is the mass of the system.Natural frequency:$$\mathrm{\omega_{n} = \sqrt{\frac{k}{m}}}$$where k is the spring constant and m is the mass of the system.Resonant frequency:$$\mathrm{\omega_{d} = \sqrt{\omega_{n}^{2}-\zeta^{2}\omega_{n}^{2}}}$$At resonance, the amplitude of the system will be maximum when forced by a sinusoidal force of frequency equal to the resonant frequency.Resonant frequency:$$\mathrm{\omega_{d} = \sqrt{\omega_{n}^{2}-\zeta^{2}\omega_{n}^{2}}}$$$$\mathrm{\omega_{d} = \sqrt{(6.57)^{2}-(-2.88)^{2}} = 6.98 rad/s}$$Hence, the frequency of applied force at which resonance will occur is 6.98 rad/s.

The frequency of the applied force at which resonance will occur is ω = 2√5 rad/s.

To determine the frequency of the applied force at which resonance will occur, resonance happens when the frequency of the applied force matches the natural frequency of the system. The natural frequency can be determined using the formula:

ωn = √(K / M),

where ωn is the natural frequency, K is the spring constant, and M is the mass of the system.

Substituting the given values of K = 400 N/m and M = 20 kg into the equation, we can calculate the natural frequency ωn.

ωn = √(400 N/m / 20 kg) = √(20 rad/s²) = 2√5 rad/s.

Therefore, the frequency of the applied force at which resonance will occur is ω = 2√5 rad/s.

The correct question is given as,

M= 20kg

Fo = 90 N

ω = 6 rad/s

K = 400 N/m

C = 125 Ns/m

Determine the frequency of applied force at which resonance will occur?

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Answer:

não sei.................

One fifth of the difference between a number and one is given to us in this line. This must be written as an algebraic expression. Now that this number is expressed as a letter x difference.

Thus, a number that is 5 more than x is equal to x+5. As a result, “5 more than a number” is represented by the algebraic expression “x+5”. The right response is therefore “x+5”.

We don't know what the value of the variable x is, but it can have any value. Since it is a constant number that is utilized with the variable term and is clearly defined, 5 is referred to as the coefficient of x.

Therefore, It can be calculated as 1, divided by 5, multiplied by the entity that is present. For the response to the query is 1 multiplied by x, minus 1, multiplied by 5 divided by 1.

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In daily life the common example of isolated system, closed system and open system is themosteel bottle , human body and ecosystem respectively.

Water in a thermos, or thermosteel bottle is an example of isolated system where no transfer of energy neither transfer of matter takes place between the system and surroundings. Although no system is perfectly isolated, after some instant there a hear loss takes place by some means.

There are three types of system in thermodynamics,

Thermodynamics is the branch of science is which we study about the heat, temperature, work and their relation to energy.

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Answer:

W = 1750 N

Explanation:

Given that,

A shopper in a supermarket pushes a cart with a force of 35 N directed parallel to the ground.

We need to find the work done by the shopper on the cart as the shopper moves along a 50.0 m length.

Let W is the work done. As the force is parallel to the ground, angle between force and distance is 0 degrees.

W = Fd

W = 35 N × 50 m

= 1750 N

So, the work done by the shopper on the cart is 1750 N.

Answer: 0.5

Explanation:

Answer:

12.5

Explanation:

the formula v⁰y=usin∅

therefore substitution of the values

v⁰y= 22sin(35) = 12.5

The geothermal gradient in the tectonically stable region is approximately 21°C/km, indicating that the temperature increases by an average of 21 degrees Celsius per kilometer of depth.

To calculate the geothermal gradient, we need to find the rate at which the temperature increases with depth.

Temperature at the surface (T₁) = 14°C

Temperature at a depth of 5.0 km (T₂) = 119°C

Temperature difference = T₂ - T₁ = 119°C - 14°C = 105°C

Depth difference = 5.0 km - 0 km = 5.0 km

Geothermal gradient = Temperature difference / Depth difference

Geothermal gradient = 105°C / 5.0 km

Calculating this expression, we find:

Geothermal gradient ≈ 21°C/km

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Answer:

B

Explanation:

According to boyle's law for a gas the pressure and volume are inversely proportional.this simply means when one increases the other one reduces and when the other one reduces the other increases.so in this case the volume increased to twice it original amount meaning the pressure will reduce to half the volume.

I hope this helps

When the north-pole end of a bar magnet is held near a positively charged piece of plastic, the plastic is not affected by the magnet. Hence, the correct option is "It is unaffected by the magnet." This is because the magnetic field is a vector quantity that has both direction and magnitude. option a.

The north-pole end of the magnet produces a magnetic field that flows in a particular direction. The positively charged piece of plastic does not possess any magnetic properties that could make it interact with the magnet. Therefore, the plastic will not be attracted or repelled by the magnet, it will be unaffected by it.However, if the plastic was a magnetic material, it would have interacted with the magnetic field produced by the north-pole end of the magnet. If it was a magnetic material, the north-pole end of the magnet would have repelled the north-pole end of the magnetic material and attracted the south-pole end of the magnetic material.To conclude, since plastic is not a magnetic material, it will remain unaffected by the magnetic field produced by the north-pole end of the bar magnet.

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Answer:

13.4 m/s^2

Explanation:

40 divided by 3 equals 13.3 repeating.

Increasing the distance between the objects

here's the Answer :

=》Increasing the distance between the objects.

since, gravitational force is inversely proportional to the distance between the objects, so if the distance increases the force will decrease.

\(gravitational \: force \: \: \dfrac{1}{ \alpha } \: \: distance\)

Even though New Zealand is very far away, transporting milk from there to England can be more energy efficient than producing milk in England because New Zealand has a much more favorable climate for dairy farming, allowing cows to graze outdoors all year round.

This means that less energy is needed for heating, lighting, and ventilation compared to intensive indoor dairy farming in England. In addition, New Zealand's pasture-based farming practices require less energy-intensive inputs such as feed and fertilizer, further reducing the carbon footprint of milk production.

Lastly, modern transport methods such as refrigerated ships can transport large quantities of milk over long distances with relatively low energy use, making it a viable option for meeting demand in countries with less favorable conditions for dairy farming.

Most cows in New Zealand are Friesians (the black and white cows you see when driving past a farm) or Jersey cows (the soft brown cows). It's amazing how cows turn green grass into white milk. It is considered the most expensive grain or food for cows.

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Answer:

Aluminium

Explanation:

The heat capacity for Aluminium is greatest and so it retains heat longer hence its the best conductor of heat.

Answer:

Yes, gravitational force is everywhere. Even if you don't move or move, or wherever you are, there is gravitational force.

The average distance of the object from the Sun is 4.88 x 10¹¹ m.

The average distance from the sun is calculated as follows;

(T² / a³) = (4π² / GM)

Where;

a = (GMT² / 4π²)^(1/3)

a = [(6.67 x 10⁻¹¹ x 1.989 x 10³⁰ x  (5.91 x 3.15 x 10⁷)² / (4π²)]^(1/3)

a = 4.88 x 10¹¹ m

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Answer:

C: Energy of motion

Explanation:

Answer:

I need help with my password and I don’t know how to change it will you please help me

Explanation: