I need help with one question on my homework. This is on the Specific Heat Capacity required practical.
Sample c has no solid residue left when evaporated. Suggest why it has a boiling point 1.7 degrees Celsius lower than distilled water.

Answer:

Yes

Momentum is a vector quantity

Explanation:

A vector quantity is a quantity that has both magnitude and direction

So definitely direction matters

Answer:

no on edge 2021

Explanation:

Answer:

6 m/s

Explanation:

momentum= mass times velocity

120 = 20v

v = 120/20

Answer:

7

Explanation:

7

Answer:

The magnitude of the impulse experienced by the particle is 100 kg.m/s.

Explanation:

Given;

mass of the particle, m = 5 kg

initial velocity of the particle, v₁ = 10 m/s

assuming the particle rebounds with same velocity backwards, v₂ = - 10 m/s

The impulse experienced by the particle is the change in linear momentum;

J = ΔP = mv₁ - mv₂

J = m(v₁ - v₂)

J = 5 (10 - (-10))

J = 5 (10 + 10)

J = 5(20)

J = 100 kg.m/s

Therefore, the magnitude of the impulse experienced by the particle is 100 kg.m/s.

Answer:

the final velocity of the skater after throwing the snowball is 3.17 m/s.

Explanation:

Given;

mass of the ice skater, m₁ = 72 kg

initial velocity of the ice skater, u₁ = 3.1 m/s

mass of the snowball, m₂ = 0.21 kg

initial speed of the snowball, u₂ = 28.0 m/s

Let the final velocity of the skater after throwing the snowball = v

Apply the principle of conservation of linear momentum to determine v;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

72 x 3.1   +  0.21 x 28  = v(72 + 0.21)

229.08 = v(72.21)

v = 229.08 / 72.21

v = 3.17 m/s

Therefore, the final velocity of the skater after throwing the snowball is 3.17 m/s.

Answer:

11 cm and concave

Explanation:

edge 2021

Answer:

it is -21, The top part is correct it is only the second part this is the first part.

Explanation:

Answer:

the velocity component parallel to the magnetic field vector

Explanation:

When a charged particle moves in a helical path, we can decompose its velocity into two parts v_parallel and v_perpendicular to the magnetic field.

Let's analyze which component receives a force

            F = q vxB

the bold letters indicate vectors, in the vector product if the two vectors are parallel the angle is zero and the sin 0 = 0 for which there is no force. therefore the velocity parallel to the field remains constant

If the two vectors are perpendicular, the angle is 90º and the sin 90 = 1, for which there is a force, which has a radial direction and consequently a centripetal acceleration that gives a circular path that does not remove the particle from the magnetic field

When checking the different answers, the correct one is: the velocity component parallel to the magnetic field vector

Answer: i really don't know bu i recomened you watch josie b asmr she is the best

Explanation:

Answer:

5.84×10^-10 N

Explanation:

F=G×ms×mr/r^2

ms=50 kg

mr= 70 kg

r=20 m

F=6.67×10^-11 N×m^2/kg^2×50 kg×70 kg/(20 m)^2

F=5.84×10^-10 N

The gravitational force is [tex]5.84*10^{-10} N[/tex].

The gravitational force is a force that attracts any two objects with mass.

[tex]F=G{\frac{m_1m_2}{r^2}}[/tex]

Where,

F = force

G = gravitational constant

[tex]m_{1}[/tex] = mass of object 1

[tex]m_{2}[/tex] = mass of object 2

r = distance between centers of the masses

[tex]m_{1}[/tex] =      70kg

[tex]m_{2}[/tex] = 50kg

r       =      20 m

G     =       [tex]6.67*10^{-11} Nm^2/kg^2[/tex]

[tex]F= \frac{6.67*10^{-11}*70*50}{20^2}[/tex]

[tex]F = 5.84*10^{-10} N[/tex]

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If the resistors are in series, it's 75 volts.

If they're in parallel, it's 150 volts.

You never told us series or parallel.

Answer:

In order to check its magnetic properties and for removing impurities.

Explanation:

A scientist use a magnet and small strainer while investigating the physical properties of a substance in order to check the magnetic properties of the substance as well as to separate the substance from the other impurities. Magnet attract substances that is made of metals or magnetic characteristics while on the other hand, small strainer is used to separate impurities from the investigating substance so that's why the scientist use a magnet and small strainer during investigation of a substance.

A scientist use a magnet to check magnetic properties of the substance  and use small strainer to separate the substance from the other impurities.

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Answer:

1. We cannot walk .

2. We will not get a grip to hold things, then we cannot eat,write,Hold pen or pencil etc.

3. Moving things cannot be stopped.

4.Buildings cannot be constructed.

5. We cannot fix a nail to the wall.

6.We cannot stand properly without a grip.

7.we would keep slipping.

8.Nothing will be steady on ground. , things will not be at a proper places because of no grip.

9.Brakes in the car / vehicles will be useless.

10. Finally all the things, including us will be floating in the air.

Explanation:

Hope that helps

Answer:

/\ = 0.75m

Explanation:

v = f × /\

342.5= 457/\

/\ = 0.75m

Answer:

since the charges are of different nature it's a attractive force

Explanation:

magnitude of force=

9*10^9*5*10^-6*3*10^-6/0.04

= 3.375N answer

Answer:

Insulators is the correct answer

Explanation:

A few electrons make up the insulators, which allow for very little electrical current to flow. While the conductors are excellent electrical conductors. Rubber is a poor insulator compared to metal, which is a very good conductor.

The insulator is a material that consists of a few electrons and they permit very little flow of electrical current. While the conductors are very good conductors of electricity. Metal is a very good conductor while rubber is a poor insulator.

Hence the answer is conductors possess free electrons, while insulators have few free electrons

The conductor has thus been used for wiring purposes and can be effectively used made to use energy; The insulator is a poor absorber and thus are unable to transfer energy.

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Explanation:

Cultural Ecosystem Services (CES) are the non-material benefits people obtain from nature. They include recreation, aesthetic enjoyment, physical and mental health benefits and spiritual experiences. They contribute to a sense of place, foster social cohesion and are essential for human health and well-being.

Answer:

The resistor has a resistance of 10.667 ohms.

Explanation:

By Ohm's Law, voltage ([tex]V[/tex]), in volts, is directly proportional to the current ([tex]i[/tex]), in amperes, and by definition of power ([tex]\dot W[/tex]), in watts, we have the following formula:

[tex]\dot W = i^{2}\cdot R[/tex] (1)

Where [tex]R[/tex] is the resistance, in ohms.

If we know that [tex]\dot W = 24\,W[/tex] and [tex]i = 1.5\,A[/tex], then the resistance of the resistor is:

[tex]R = \frac{\dot W}{i^{2}}[/tex]

[tex]R = 10.667\,\Omega[/tex]

The resistor has a resistance of 10.667 ohms.

Answer: C

Explanation:

Answer:

yes

Explanation:

Answer: Sea otter is the pioneer species in the kelp forest as it regulates and controls the population of other species in the kelp forest.

Explanation:

If sea otters are hunted and their population is brought to extinction then this will cause major harm the ecosystem of the kelp forest and it will disturb the ecological balance in the kelp forest. The herbivorous animals consumed by the sea otters will increase in population and they will consume a lot of vegetation in the forest. The kelp forest which forms the coastline will not remain effective in providing protection against the storms to the neighboring areas.

Answer:

B

Explanation:

I think so

Answer:

A. 3,000,000 m

B. 0.25 km

C. 10 m

D. 1,000 cm

Explanation:

no hablo español, así que solo ingrese esto en el traductor de G*ogle

A. One kilometer equals 1000 meters, so

3,000*1,000 = 3,000,000 m

B. One meter equals 0.001 kilometer, so

250*0.001 = 0.25 km

C. One centimeter equals 0.01 meter

1,000*0.01 = 10 m

D. One milimeter equals 0.1 centimer, so

10,000*0.1 = 1,000

Answer:

I think its A

Explanation:

Not 100 percent sure tho but they do go up and down in big movements.

Answer:

ij

Explanation:

Answer:

180N

Explanation:

the gravity on Earth is six times the one on the moon

Answer:

I think 180N

Explanation:

the gravity of the surface of the earth is 6Times

more than the moon

Answer:

It would cause the lens to produce only real images. It would cause the lens to produce only virtual images. It would make the lens stronger. It would make the lens weaker.

Explanation:

quizlet

Answer:

its c

Explanation:

The specific heat of the copper pan is the lowest among the other given pans. Therefore, a copper pan should carter used that will heat up and cool down the fastest. Therefore, option (A) is correct.

Specific heat of a substance can be described as the heat energy required to raise the temperature of one unit mass of a material by 1 °C. The S.I. unit of the specific heat capacity of a material is J/g°C.

The thermal capacity of a substance is a physical characteristic of a substance so it depends upon the nature of the material.

The mathematical expression of specific heat can be represented as :

Q = m×C× ΔT        Where C is the specific heat.

The specific heat is an intensive characteristic of a material and does not depend upon the shape or size of the quantity.

As given the values of the specific heat of metals of the frying pans, the highest specific heat means that the pan will take more heat to increase just one-degree temperature. As copper has the lowest specific heat so it can easily heat up in comparison to other pans.

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Answer:

The magnitude of the magnetic force acting on the conductor is 0.75 Newton

Explanation:

The parameters given in the question are;

The length of the straight segment of wire, L = 25 cm = 0.25 m

The current carried in the wire, I = 5 A

The orientation of the wire with the magnetic field = Perpendicular

The strength of the magnetic field in which the wire is located, B = 0.60 T

The magnetic force, 'F', is given by the following formula;

F = [tex]\underset{I}{\rightarrow }[/tex]·L×[tex]\underset{B}{\rightarrow }[/tex] = I·L·B·sin(θ)

Where;

[tex]\underset{I}{\rightarrow }[/tex] = The current flowing, I

L = The length of the wire

[tex]\underset{B}{\rightarrow }[/tex] = The magnetic field strength, B

θ = The angle of inclination of the conductor to the magnetic field

Where I = 5 A, L = 0.25 m, B = 0.60 T, and θ = 90°, we get;

F = 5 A × 0.25 m × 0.60 T × sin(90°) = 0.75 N

Therefore

The magnitude of the magnetic force, F = 0.75 N.