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Answer:

Steps to determine the specific heat capacity.

1. Place a beaker on a balance and press zero.

2. Now add the oil to the beaker and record the mass of the oil.

3. Read the starting temperature of the oil.

4. Connect a joulemeter to the immersion heater.

5. Time for thirty minutes.

6. Read the number of joules of energy that passed into the immersion heater.

7. Read the final temperature of the oil.

8. Use the following formula to calculate the specific heat capacity.

Explanation:

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Answer:

c.) magnetosphere

Explanation:

I think is C

A parallel circuit, is one which the conductors leading into the bulbs are joined together on one side of the bulbs, and the conductors coming out of the bulbs are joined together on the other side of the bulb

The correct arrangement, advantages, lamp and resistance values are;

The reason the above values are correct are as follows:

(i) From the diagram attached, the lamps are arrange in parallel

This is so because, each lamp is directly connected across the terminals of the the voltage source

(ii) The advantages of the bulbs arranges in parallel are;

(iii) The brightness of the lamp is given by the power of the lamp

The lamp with the highest wattage, or power glows the most

Power, P = Voltage, V × Current, I

The power for lamp A, [tex]P_A[/tex] = 60 V × 3 A = 180 W

The power for lamp B, [tex]P_B[/tex] = 60 V × 4 A = 240 W

The power for lamp C, [tex]P_C[/tex] = 60 V × 5 A = 300 W (Brightest)

The power for lamp D, [tex]P_D[/tex] = 60 V × 3 A = 180 W

Therefore, lamp C has the highest power and glows the brightest

(iv) The total resistance is given by the voltage, divided by the total current

Total current, I = 3 A + 4 A + 5 A + 3 A = 15 A

[tex]Total \ resistance, \ R_{tot} = \dfrac{V}{I_{tot}}[/tex]

Therefore;

[tex]Total \ resistance, \ R_{tot} = \dfrac{60 \, V}{15 \, A }}=4 \, \Omega[/tex]

The total resistance, R = 4 Ω

Learn more about series and parallel circuits here:

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Mechanical energy = Kinetic Energy + Potential Energy

Kinetic energy = 1/2 * m * v² = 1/2 * 3.5 * (10)²

=> Kinetic energy = 175 J

Potential energy = m * g * h = 3.5 * 10 * 3 = 105 J

Hence,

Mechanical energy = Kinetic Energy + Potential Energy

= 175 J + 105 J

= 280 J

Taking into account the potencial, kinetic and mechanical energy, the total mechanical energy is 278.005 J.

Potential energy refers to the position that a mass occupies in space and its magnitude is directly proportional to the height at which the object is, with respect to a reference position, to the mass of the object and to gravity:

Ep = m×g×h

On the other hand, kinetic energy manifests itself when bodies move and is associated with speed. The kinetic energy of a body depends on its mass and the square of its speed:

Ec = [tex]\frac{1}{2}[/tex]×m×v²

The mechanical energy of a body is the capacity it has to carry out mechanical work, that is, to produce a movement due to causes of mechanical origin, such as its position or its speed.

The mechanical energy of a body is the sum of its kinetic energy and its potential energy:

Em = Ep + Ec

Where

Then:

Em= m×g×h + [tex]\frac{1}{2}[/tex]×m×v²

The Principle of conservation of mechanical energy indicates that, in the absence of friction and without the intervention of any external work, the sum of the kinetic and potential energies remains constant, that is, the mechanical energy of a body remains constant throughout the movement. if no friction force acts.

In this case, you know that:

Complying with the Principle of Conservation of Mechanical Energy and replacing in the expression of mechanical energy:

Em= 3.5 kg×9.81 [tex]\frac{m}{s^{2} }[/tex]×3 m + [tex]\frac{1}{2}[/tex]×3.5 kg×(10 [tex]\frac{m}{s}[/tex])²

Solving:

Em=103.005 J + 175 J

Em= 278.005 J

Finally, the total mechanical energy is 278.005 J.

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Answer:

Explanation:

To find the time taken given the velocity and distance covered we use the formula

[tex]t = \frac{d}{v} \\ [/tex]

where

t is the time

d is the distance covered

v is the velocity

From the question

d = 84 mi

v = 70 mi/h

We have

[tex]d = \frac{84}{70} = \frac{6}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

0.30 m/s²

Explanation:

Given:

v₀ = 0.2 m/s

v = 1.6 m/s

t = 4.7 s

Find: a

a = (v − v₀) / t

a = (1.6 m/s − 0.2 m/s) / 4.7 s

a = 0.30 m/s²

Answer:

Explanation:

Given

v = 10.22m/s

u = 9.78m/s

S = 200m

Using the equation of motion'

v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the displacement

Substitute the given parameters into the formula:

10.22² = 9.78² + 2a(200)

104.4484 = 95.6484 + 400a

400a = 104.4484 -95.6484

400a = 8.8

a = 8.8/400

a = 0.022m/s²

Hence the magnitude of his acceleration would have been 0.022m/s²

Answer:

The energy an object has due to its motion is called kinetic energy

Explanation:

Factors Affecting Kinetic Energy: the kinetic energy of an object depends on both its speed and its mass.

Answer:

kinetic energy

Explanation:

In physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

Answer:

577656.0

Explanation:

Answer:

C. compactation and cementation or A. crystallization and solidification

Explanation:

Answer:

i think its a sorry if im whrong and good luck! :)

Answer:

B. Insulates thermal energy

Answer:

b

Explanation:

if you insulate thermal energy aka heat you are keep the heat in one place in this case the metal, which provent you from burning your self if you hold the plastic part.

Answer:

Electronegative atom will create a stronger negative charge is true.

Explanation:

Given that,

Electronegativity affects the strength of intermolecular forces.

We know that,

Electronegativity :

Electronegativity is a ability of an atom, shared electron to itself.

In periodic table,

When we move left to right in period then the electronegativity increases.

When we move up to down in a group then the electronegativity decreases.

We know that,

The intermolecular forces are dipole-dipole interactions which is the strongest intermolecular force of attraction.

If the electronegativity of atom is more, then the atom gain negative charge.

When the attraction force is more in atoms then the electronegative will be more.

Hence, Electronegative atom will create a stronger negative charge is true.

Answer:

The launch speed is approximately 13.28 m/s

Explanation:

The given parameters are;

The distance from the base of the cliff the projectile lands = 26.3 meters

The height of the cliff, s = 19.3 meters

The time it takes the projectile to land = 5 seconds

The direction of the projectile = Horizontal

The vertical motion of the projectile is given as follows;

19.3 = 1/2 × g × t² = 1/2 × 9.81 × t²

t = √(2 × 19.3/9.81) ≈ 1.98 seconds

Therefore, the time it takes to land ≈ 1.98 seconds

The launch (horizontal) speed = (The horizontal distance)/(Horizontal time)

The launch (horizontal) speed = 26.3/1.98 ≈ 13.28 m/s.

The launch speed of a horizontally launched projectile is equal to 13.22 m/s.

Given the following data:

To determine the launch speed of a horizontally launched projectile:

First of all, we would calculate the time it took the projectile to land at the base of the cliff by using the maximum height formula:

[tex]H = \frac{1}{2} gt^2[/tex]

Making t the subject of formula, we have:

[tex]t=\sqrt{\frac{2H}{g} }[/tex]

Substituting the given parameters into the formula, we have;

[tex]t=\sqrt{\frac{2\times 19.3}{9.8} }\\\\t=\sqrt{\frac{38.6}{9.8} }\\\\t=\sqrt{3.94}[/tex]

Time, t = 1.99 seconds

Next, we would determine the launch speed by using the formula:

[tex]Horizontal\;speed = \frac{horizontal\;distance}{time} \\\\Horizontal\;speed = \frac{26.3}{1.99}[/tex]

Horizontal speed = 13.22 m/s

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Answer:

The Sun shines by turning hydrogen into helium in its core.

Explanation:

This process is called nuclear fusion. Fusion happens when lighter elements are forced together to become heavier elements. When this happens, a tremendous amount of energy is created.

Answer:

D : An electron may act with either particle-like or wave-like characteristics.  

Explanation:

This is the whole basis of the Schrödinger equation.

The other options are correct, but they do not state the dual nature of the electron.

Answer:

False

Explanation:

I got y = 0.94427191  and y = -16.944272. Not sure if right tho.

I did  [tex]{k q_1 \over y^2} &= {k q_2 \over (2-y)^2}[/tex], put the known in and solved it.

Answer:

c

Explanation:

Answer:

mass = 40 kg

g = 9.8 m/s²

weight = mg

= 40 x 9.8

= 392 N

Answer: A

Explanation:

Answer:

A. You would weigh the same on both planets because their masses and the distance to their centers of gravity are the same.

Explanation:

A pe x :)

Answer: The answer is 16Kg

Explanation:If you use the formula for mass, mass=force/acceleration and plug the numbers into the formula, 48/3 you would get

16Kg

Answer:

The brick was traveling at 49 m/s the instant before hitting the ground.

Explanation:

When an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is [tex]g = 9.8 m/s^2[/tex].

The final velocity of a free-falling object after a time t is given by:

[tex]vf=g.t[/tex]

The distance traveled by a dropped object is:

[tex]\displaystyle y=\frac{gt^2}{2}[/tex]

The brick takes 5 seconds to land from the high scaffold. The speed at which it lands is:

[tex]vf=9.8\cdot 5[/tex]

vf=49 m/s

The brick was traveling at 49 m/s the instant before hitting the ground.

Answer:

A seesaw

Explanation:

Answer:

a seesaw

Explanation:

Because it takes more force to accelerate a mass, and gravity exerts more force on a greater mass.  So every object winds up with the same acceleration.  

And THAT, of course, says that all objects in the same gravity will pick up the same speed in the same time, and fall the same distance in the same time.

Answer:

29.69 m/s

Explanation:

From the question given above, the following data were obtained:

Height (h) = 45 m

Velocity (v) =...?

Next, we shall determine the time taken for the ball to get to the ground. This can be obtained as follow:

Height (h) = 45 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h = ½gt²

45 = ½ × 9.8 × t²

45 = 4.9 × t²

Divide both side by 4.9

t² = 45/4.9

Take the square root of both side

t = √(45/4.9)

t = 3.03 s

Finally, we shall determine the velocity with which the ball hits the ground. This is illustrated below:

Initial velocity (u) = 0 m/s

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) = 3.03 s

Final velocity (v) =.?

v = u + gt

v = 0 + (9.8 × 3.03)

v = 0 + 29.694

v = 29.694 ≈ 29.69 m/s

Therefore, the ball hits the ground with a velocity of 29.69 m/s.

In projectile horizontal distance is given by :

[tex]h = \dfrac{u^2sin^ 2\theta}{2g}[/tex]

Putting all given values, we get :

[tex]h = \dfrac{u^2sin^ 2\theta}{2g}\\\\h=\dfrac{16^2\times sin^2 \ 55.3^o}{2\times 9.8}\\\\h=13.1\ m[/tex]

Therefore, maximum height of football is 13.1 m.

Hence, this is the required solution.

Answer:

d

Explanation:

Answer:

65c

Explanation: