13. A glass of water left in the sun becomes warm. Estella adds ice to the water to make
it cool. What energy change occurs when ice is added to the warm drink?

Answer:

option c...................

Answer:

2.5 cm³

Explanation:

Use Boyle's Law

1×5=2×V

5=2V

V=5/2=2.5 cm³

Explanation:

Because there is no light to be reflected. Reflection is the process of bouncing back of the light but since there is no light then nothing will be reflected.

It is correct .

The light is not reflected by the mirror in a dark room due to which no image is formed.

Given is that no reflection is formed when light is absent.

We will not see our reflection in mirror in a dark room because an image is formed only when the light gets reflected by the mirror whereas in a dark room, there is no light to cause reflection hence, no image will be formed

Therefore, the light is not reflected by the mirror in a dark room due to which no image is formed.

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Answer:

False

Explanation:

Just took the test

False, because hypochondriacs think they have a significant, undetected medical ailment even when testing reveal they are healthy.

A hypochondriac is someone who, despite diagnostic testing showing they have no health issues, lives in constant anxiety that they have a terrible, undetected medical illness. They are obsessed with the concept that they suffer from a major illness that has gone untreated.

In adults, hypochondriasis often begins to manifest. Among the symptoms are a persistent, strong anxiety of developing a major illness and concern that seemingly little symptoms portend a larger problem. A patient may change physicians or see them regularly.

Medication and counselling could be helpful.

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Answer:

I can help with the last question.

Explanation:

The force from the ball on the left ball will hit the ball next to it, bringing the force all the way to the right ball, and vice versa. Have a great day!

Answer:

gravity is pulls objects to the center of the earth.

friction is slows or stops motion when objects rub together.

magnetism is pushes or pulls objects containing iron or other metals.

Answer:

A quantity that has magnitude but no particular direction is described as scalar. A quantity that has magnitude and acts in a particular direction is described as vector.

Answer:

1.parked car 2.car moving 50 km/h 3.train moving at 50 km\h 4.train moving at 80km\h

1.parked car 2.car moving 50 km/h 3.train moving at 50 km\h 4.train moving at 80 km\h is increasing momentum order.

In Newtonian mechanics, momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity, P = mv.

The total momentum experienced by the object depends on the force acting on it. The momentum remains unchanged in the absence of external forces.

1.parked car 2.car moving 50 km/h 3.train moving at 50 km\h 4.train moving at 80 km\h is increasing momentum order.

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Answer:

A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of the incidence is the angle between the incident ray and the surface normal (an imaginary line perpendicular to the surface).

Answer:

If one of the filaments burns out, the resistance and the potential difference across the other lamps will not change; therefore, their currents will remain the same.

Explanation:

Answer:

Answer:

Explanation:

A

Answer:

C - Bang on a drum

Explanation:

Answer:

Explanation:

Answer:

Copper(II) Hydrogen Carbonate Cu(HCO3)2 Molecular Weight

The name of the compound Cu(HCO₃)₂ is  Copper (II) bicarbonate.

A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements.

Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be shattered or new ones created during this process.

Compounds can be divided into four main categories based on the bonds that hold their individual atoms together. Covalent bonds hold together molecules, ionic bonds hold together ions, metallic bonds hold together intermetallic compounds, and coordinate covalent bonds hold coordination complexes together.

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Answer:

Mass = 2154 grams

Explanation:

Given the following data;

Acceleration = 520m/s²

Force = 11.2N

To find the mass;

Force = mass * acceleration

Mass = force/acceleration

Substituting into the equation, we have;

Mass = 11.2/520

Mass = 2.154 kg

Therefore, the value of mass in grams;

1000 grams = 1 kilograms

x grams = 2.154 kilograms

Cross-multiplying, we have;

2.154 * 1000 = 2154 grams.

Mass = 2154 grams.

Therefore, the mass of the model rocket is equal to 2154 grams.

Answer:

c. shot put

Explanation:

cause the shot is a ball

Answer:

0J

Explanation:

Kahn academy approved

The Workdone is the product of force and distance, Hence, the Workdone on the box from distance x = 0 meters and x = 16 meters is 0 Joules.

Using the graph given :

The work done from x = 0 to x = 16 metres ;

The distance can be split evenly into :

(x = 0 to x = 8) and (x = 8 to x = 16)

Workdone = Force × distance

Workdone from ; x = 0 to x = 8 ;

Force at a distance of 8 meters = - 40N

Workdone = - 40N × 8 m = -320 Nm

Workdone from ; x = 8 to x = 16 ;

Force at a distance of 16 meters = 40 N

Workdone = 40 N × 8 m = 320 Nm

The total workdone :

(-320 + 320) Nm = 0 J

.

Therefore, the Workdone ls 0 Joules.

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Answer:

if a red gaint star is large enough, it may eventually blow up in an explosion called a supernova leaving behind very dense neutron star.

Answer:

Thin, aluminium and buried underground.

Explanation:

When it comes to electrification of a state or province, some characteristics of the wire to use must be considered. This would help to minimize and avoid power loss and wire burns.

i. The wire to use should be thin, and a quite number can be twisted one against the other so as to increase the surface area for heat dissipation.

ii. Aluminium wire is more preferable for this project. It has a high melting point, and reduces energy loss.

iii. Burying the wire underground through an insulator is the best choice, though expensive but would preserve the wire from external influence.

Answer:

The spring constant is approximately 46.382 newtons per meter.

Explanation:

From Physics, the period ([tex]T[/tex]), measured in seconds, experimented by an object under Simple Harmonic Motion:

[tex]T = 2\pi\cdot \sqrt{\frac{W}{g\cdot k} }[/tex] (1)

Where:

[tex]W[/tex] - Weight, measured in newtons.

[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.

[tex]k[/tex] - Spring constant, measured in newtons per meter.

If we know that [tex]W = 127\,N[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex] and [tex]T = 3.32\,s[/tex], then the spring constant of the system is:

[tex]\frac{T^{2}}{4\cdot \pi^{2}} = \frac{W}{g\cdot k}[/tex]

[tex]k = \frac{4\cdot \pi^{2}\cdot W}{g\cdot T^{2}}[/tex]

[tex]k \approx 46.382\,\frac{N}{m}[/tex]

The spring constant is approximately 46.382 newtons per meter.

Answer:1. true

2false

Explanation:

A nswer:

1) false

2) true

Hope its true ! btw its gogole forms right :)

Answer:

A motion map can represent the position, velocity, and acceleration of an object at various clock readings. ... The corresponding motion map has the points spaced farther apart (because the car would go a further distance in each second), and the velocity vectors (arrows) are longer, because the car is moving faster.

Explanation:

Answer:

Heat supplied should be equal to zero.

Explanation:

Given that a compressed gas is held inside a canister with a moveable lid. The temperature of the gas is significantly higher than the air temperature outside the canister. When weight is removed from the lid, the gas

expands to lift it.

For this expansion to be as nearly adiabatic as possible, one of the conditions that should be met is that there should be no supply of thermal or heat energy to the system.

According to first law of thermodynamics:

Change in internal energy = heat supply + work done by the system

If heat supplied = 0

Then, nothing is constant.

The internal energy = work done by the system.

Therefore, no heat should be supplied to the system.

Answer:

1.27 Mega watt approx

Explanation:

Given data

Mass= 0.5kg

c= 4200 J/kg °C

T1= 100°C

Time = 2 hours >>>> 7200 seconds

From the given data the water is already at the boiling point

Hence if continuous heat is being added the latent heat of vapourization will result, the latent heat of vaporization is about 2,260 kJ/kg

Q= mL

Q= 0.5*2,260

Q = 1130kJ

Power= Energy * Time

Power=  1130* 1130

Power= 1.27mega watt approx

Answer: clastic sedimentary rock

Explanation: Hope this helps!

Answer:

Angle Vy Vy^2/(2*g)

25         6.3    2.02

30          7.5  2.87

45         10.6 5.73

50         11.5 6.75

65         13.6 9.44

70         14.1 10.1

Vy = vertical velocity = V sin theta

2 g H = Vy^2      since the final velocity is zero

H = Vy^2 / (2 * g)

Answer:

Substance A will release more heat.

Explanation:

Let suppose that both substances experiment an entirely sensible heat process and are incompressible and begin at the same temperature. Physically speaking, specific heat ([tex]c[/tex]), measured in kilojoules per kilogram-degree Celsius, can be described by following expression:  

[tex]c = \frac{Q}{m\cdot (T_{f}-T_{o})}[/tex] (1)

Where:

[tex]Q[/tex] - Released heat, measured in kilojoules.

[tex]m[/tex] - Sample mass, measured in kilograms.

[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Initial and final temperatures of the sample, measured in degrees Celsius.

If we know that [tex]c_{A}> c_{B}[/tex], [tex]m_{A} = m_{B}[/tex], [tex]T_{A,o} = T_{B,o}[/tex] and [tex]T_{A,f} = T_{B,f}[/tex], then we have the following inequation:

[tex]\frac{Q_{A}}{m\cdot (T_{A,f}-T_{A,o})} > \frac{Q_{B}}{m\cdot (T_{B,f}-T_{B,o})}[/tex]

[tex]Q_{A} > Q_{B}[/tex]

Substance A will release more heat.

Answer:

Final momentum after a head on collision is -2kgm/

Explanation:

  One ball moves to the right and the other moves opposite  and momentum is a vector quantity so that considering the direction

Initial momenta are        P₁=2x3=6kgm/s        P₂=4x(-2)=-8kgm/s      

Final momentum is the vector sum of P(final)= 6-8= -2 kgm/s

Answer:

Where is the diagram????

Answer:

reflection

Explanation:

Given :

Current, I = 0.5 A.

Power of toaster, P = 2 kW = 2000 W.

To Find :

How much voltage is required.

Solution :

We know, voltage is given by :

[tex]V = \dfrac{P}{I}\\\\V = \dfrac{2000\ W}{0.5 A}\\\\V = 4000 \ volts[/tex]

Therefore, 4000 Volts are required.

Answer:

4000

Explanation:

2000/0.5=4000

Answer:

Current that reverses direction in the regular pattern is called an alternating current, abbreviated as 'AC'.

Explanation:

hope this helps!