Lifting a stone block 146m to the top of the Great Pyramid required 146,000 J of work. How much work was done to lift the block halfway to the top?
A. 36,500 Joules
B. 73,000 Joules
C. 146,000 Joules
D. 292,000 Joules
Please help me.

The formulated sentences for each will be:

A: If length is 5cm, width 2cm, height 4cm, volume:  40 cubic centimeters.

B: If the length is 3cm, width 4cm, height 2cm, then Volume is: 24 cubic centimeters.

C:  If the length is 6cm, width 2cm, height 3cm, the  volume is 36 cubic centimeters.

D:  If the length is 3cm, width 2cm, height 4cm, the  volume 24 cubic centimeters.

To calculate the volume of a rectangular prism using multiplication, you need to multiply the length, width, and height of the prism. The multiplication sentence for this is:

Volume = length (m) x width (m) x height (m)

For a. The multiplication sentence for calculating the volume of rectangular prism C is:

b. The multiplication sentence for calculating the volume of rectangular prism B is:

c. The multiplication sentence for calculating the volume of rectangular prism C is:

Lastly, for d. The multiplication sentence for calculating the volume of rectangular prism D is:

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The maximum velocity of the pendulum is determined as 3.03 m/s.

The maximum velocity of the pendulum is calculated from the principle of conservation of energy as shown below;

K.E = P.E

¹/₂mv² = mgh

v² = 2gh

v = √2gh

where;

v = √(2 x 9.8 x 0.468)

v = 3.03 m/s

Thus, the maximum velocity of the pendulum is determined as 3.03 m/s.

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The greatest distance of the block from the center of rotation so that it does not slip is approximately 0.089 meters or 8.9 centimeters.

In order for the block to remain on the turntable without slipping, the frictional force between the block and the turntable must be equal to or less than the maximum friction that can be developed, which is 2 N in this case. The maximum frictional force is given by the product of the coefficient of friction and the normal force.The normal force is equal to the weight of the block, which is 5 N. Therefore, the maximum frictional force is 2 N.

To find the greatest distance of the block from the center of rotation without slipping, we need to consider the centrifugal force acting on the block due to the rotation of the turntable. The centrifugal force is given by the product of the mass of the block, the acceleration due to the rotation (which is equal to the square of the angular velocity times the radius), and the coefficient of friction.

Since the weight of the block is 5 N, the mass can be calculated as 5 N divided by the acceleration due to gravity (approximately 9.8 m/s^2), which gives us a mass of approximately 0.51 kg.

Given that the turntable is rotating at 0.6 revolution per second, the angular velocity can be calculated as 2π times the frequency, which gives us approximately 3.77 rad/s.

Let's assume the greatest distance of the block from the center of rotation is "r" meters.

The centrifugal force is then given by m * (ω^2) * r, and this force must be equal to or less than the maximum frictional force, which is 2 N.

Therefore, we can write the equation:

m * (ω^2) * r ≤ 2 N

Substituting the values we calculated:

0.51 kg * (3.77 rad/s)^2 * r ≤ 2 N

Simplifying the equation, we find:

r ≤ 0.089 m

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An electromagnet consists of a conductive wire wrapped around a magnetic core, creating a magnetic field when an electrical current is passed through it.

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W = 25 J

Explanation:

Work done on an object is defined as

\(W = Fd = (10\:\text{N})(2.5\:\text{m}) = 25\:\text{J}\)

Answer:depends on the masses of the objects and the distance between them

Explanation:

According to Newton's law of universal gravitation,the force of attraction between two objects depends on the masses of the objects and the distance between them

Answer:

Explanation:

The total distance travelled by ball before first bounce

= 160 + 160 = 320 ft

Distance travelled between first bounce and second bounce

= 80 + 80 = 160 ft

Distance travelled between second bounce and third bounce

= 40 + 40 = 80 ft

Distance travelled between third bounce and fourth bounce

= 20 + 20 = 40 ft .

Distance travelled in fourth bounce = 10 ft

Total distance travelled = 320 + 160 + 80 + 40 + 10

= 610 ft .

Answer:

The main points of difference between a citizen and alien are: (a) A citizen is a permanent resident of a state, while an alien is a temporary resident, who comes for a specific duration of time as a tourist or on diplomatic assignment. ... Aliens do not possess such rights in the state where they reside temporarily

Explanation:

The magnetic field is just a unit vector that explains the electromagnetic influence on electric currents, current flow, and magnetic fluids.

Current density \(J = ar^2\)

value of the constant is=  \(28.5 \ \frac{A}{mm^4}\)

radius = 5.20 mm

magnetic permeability \(\mu = 4\pi \times 10^7 \ \frac{N}{A^2}\)

calculating the area element for the straight circular conduction rod
:

\(d_A=2\pi r dr\)

Calculating the current, which is carried in the rod

\(dI = \int dA \vec{J}\)

Calculating the above equation with the limit value that is 0 to r.

\(I^{1}=\int_{0}^{r} ar^2 \times 2 \pi \cdot r d_r\)

    \(=2\pi a\int_{0}^{r} r^3 d_r \\\\=\frac{\pi ar^4}{2}\)

The calculated current value which is carried by the rod is \(\boxed{\frac{\pi ar^4}{2}}\)

In option (a)

calculating the magnitude of the magnetic field at the point \(r_1= \frac{R}{2}\)

\(\to B=\frac{\mu_{0} I^{1}}{2 \pi r}\\\\\to B \times 2\pi r= \mu_{0} (\frac{\pi a}{2}r^4)\\\\\to B \times 2\pi = \mu_{0} (\frac{\pi a}{2}r^3)\\\\\to B= \frac{\mu_{0}}{4}r^3 a\\\\\)

Substituting the above value:\(\frac{R}{2} \ for \ r\)

\(B= \frac{\mu_{0}}{4}(\frac{R}{2})^3 a\)

\(B= \frac{4 \pi \times 10^{-7}}{4}(\frac{5.2 \times 10^{-3}}{2})^3 \frac{28.5}{10^{-12}}\)

   \(= \frac{4 \pi \times 10^{-7}}{4} \times \frac{140.608 \times 10^{-9}}{8} \times \frac{28.5}{10^{-12}}\\\\= \frac{ 3.14 \times 10^{-7}}{1} \times \frac{140.608 \times 10^{-9}}{8} \times \frac{28.5}{10^{-12}}\\\\=\frac{1572.87624 \times 10^{-16}}{ 10^{-12}}\\\\=0.157 \ \ T\)

Thus, the magnitude of the magnetic field at the point \(r_1 =\frac{R}{2}\) is \(\boxed{0.157 \ T}\)

In option (b)
In this, we calculate the magnitude of the magnetic field at the point \(r_2= 2R\)

\(\to B=\frac{\mu_{0} I^{1}}{2 \pi r} \\\\\to B \times 2\pi r= \mu_{0} (\frac{\pi a}{2}R^4)\\\\\to B \times 2\pi 2R = \mu_{0} (\frac{\pi a}{2}R^3)\\\\\to B= \frac{\mu_{0}}{8}R^3 a\\\\\)

Substituting the values  

\(B= \frac{4 \pi \times 10^{-7}}{8}(5.2 \times 10^{-3})^3(\frac{28.5}{10^{-12}})\)

   \(= \frac{4 \times 3.14 \times 10^{-7}}{8} \times (5.2)^3 \times (10^{-3})^3 \times\frac{28.5}{10^{-12}}\\\\= \frac{ 3.14 \times 10^{-7}}{2} \times 140.608 \times 10^{-9} \times\frac{28.5}{10^{-12}}\\\\= 6291.50495 \times 10^{-4}\\\\= 0.629 \ \ or \ \ 0.63\\\)

Thus, the magnitude of the magnetic field at the point \(r_2 = 2R\) is \(\boxed{0.63 \ \ T}\)

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Answer:

lithium

Explanation:

I took physical science 2 years ago and passed with an A

Answer:

the answer is weight

Explanation:

Answer:

Weight

Explanation: Just took the quiz

Answer:

The characteristics that determine how easily two substances change temperature are:

The volume and density of the substances and the amount of time they are in contact do not directly affect how easily they change temperature.

Explanation:

Answer:

A B C

Explanation:

I think that is right. Sorry if it's not

Hope this helps :)

The force that will balance the two forces is 6.4 N

The resultant force, F can be obtained as follow:

F = √(F₁² + F₂²)

F = √(4² + 5²)

F = √(16 + 25)

F = √41

F = 6.4 N

Thus, the force that will balance the two forces is 6.4 N

See attached photo

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The force that will counterbalance two forces 4.0 N and 5.0 N acting perpendicular to each other is a force of 6.4 N acting in an opposite direction to the resultant of the two forces.

The Resultant of the two forces 4.0 N and %.0 N acting perpendicular to each other is calculated using the formula:

R² = A² + B²

where A and B are the two forces acting perpendicular to each other.

R² = 4² + 5²

R² = 41

R = 6.4 N

Therefore, the force that will counterbalance two forces 4.0 N and 5.0 N acting perpendicular to each other is a force of 6.4 N acting in an opposite direction to the resultant of the two forces.

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Answer:

A. Build a nest.

Explanation:

It wont do any of the other things and they need a place to sleep and lay eggs plus it is a bird

The heron birds belong to Ardeidae family. Some of the species among them are referred to as egrets or bitterns rather than a heron. A heron bird  build a nest during Spring. The correct option is A.

The heron is known as a long-legged, long-necked, fresh water and coastal birds. It a medium to large size bird with long necks and legs. They exhibit sexual dimorphism in size. The two male and female sex of the same species show distinct attributes beyond their difference in sexual organs.

Almost all the heron species are found in water and they are essentially non-swimming water birds which feed on the margins of lakes, ponds, sea, rivers and swamps. The small species of heron are generally referred to as the dwarf bittern.

The nesting season indicates the time of year during which birds build nests and lay eggs in them. In most cases bring up their young. It is in the spring season lot of food are available.

Thus the correct option is A.

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Examples of reactions could include burning sugar or steel wool, fat reacting with sodium hydroxide, and mixing zinc with hydrogen chloride.

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The principal stresses and corresponding principal directions for the stresses in a problem can be found using various methods, one of which is Mohr's circle.

What is Mohr's circle?

Mohr's circle is a graphical representation of a two-dimensional stress state. Given the stress tensor components, the Mohr's circle can be used to visualize and determine the maximum and minimum normal stresses (i.e., the principal stresses) and the orientation of the planes on which they act (i.e., the principal directions).

It is important to note that finding the principal stresses and directions requires a thorough understanding of stress analysis, including stress transformation and the use of Mohr's circle. If you have access to the full problem statement, I would be happy to help you work through the solution.

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Given data:

The position function of spring is s(t)=4sin(2t).

By differentiating the given position function with respect to time is the velocity of the system. It can be calculated as,

The acceleration of the system can be calculated by differentiating above velocity function with respect to time,

The velocity at t=2 s will be,

The acceleration at t=2 will be,

Thus, the velocity and acceleration at t=2 is -5.23 m/s and -12.1 m/s² respectively.

Answer:

B

Explanation:

The diameter of the smaller end of the pipe is approximately 0.78 meters.

To determine the diameter of the smaller end of the pipe, we can use the principle of conservation of mass. According to this principle, the mass flow rate of water should remain constant throughout the pipe.

The mass flow rate is given by the equation:
Mass flow rate = density of water * cross-sectional area * velocity

Since the density of the water remains constant, we can write:
Cross-sectional area1 * velocity1 = Cross-sectional area2 * velocity2

Given that the velocity1 is 13 m/s, the diameter1 is 1.2 m, and the velocity2 is 30 m/s, we can solve for the diameter2 using the equation:
(pi * (diameter1/2)^2) * velocity1 = (pi * (diameter2/2)^2) * velocity2

Simplifying the equation:
(1.2/2)^2 * 13 = (diameter2/2)^2 * 30

Calculating the equation:
(0.6)^2 * 13 = (diameter2/2)^2 * 30

0.36 * 13 = (diameter2/2)^2 * 30

4.68 = (diameter2/2)^2 * 30

Dividing both sides by 30:
0.156 = (diameter2/2)^2

Taking the square root of both sides:
0.39 = diameter2/2

Multiplying both sides by 2:
0.78 = diameter2

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Answer:

The acceleration is 2.448 meters per square second and is vertically upward.

Explanation:

The Free Body Diagram of the plastic ball in the liquid is presented in the image attached below. By Second Newton's Law, we know that forces acting on the plastic ball is:

\(\Sigma F = F - m\cdot g = m\cdot a\) (1)

Where:

\(F\) - Buoyant force, measured in newtons.

\(m\) - Mass of the plastic ball, measured in kilograms.

\(g\) - Gravitational acceleration, measured in meters per square second.

\(a\) - Net acceleration, measured in meters per square second.

If we know that \(F = 5\,N\), \(m = 0.408\,kg\) and \(g = 9.807\,\frac{m}{s^{2}}\), then the net acceleration of the plastic ball is:

\(a = \frac{F}{m} - g\)

\(a= 2.448\,\frac{m}{s^{2}}\)

The acceleration is 2.448 meters per square second and is vertically upward.

Answer:

Explanation:

The choices are:

A) IV. This property can only be determined by chemical reacting the sample of sulfur.

B) I and II. These properties can only be determined by chemical reacting the sample of sulfur.

C) III. These properties can be determined by physical measurements. The sulfur does not need to react, chemically, in order to measure these properties.

C) III. These properties can be determined by physical measurements. The sulfur does not need to react, chemically, in order to measure these properties.

The answer is A and B as both characteristics can only be determined by chemical reacting so they are chemical properties.

Answer:

a

Explanation:

i just did this on usatestprep.

Answer:

a) The perimeter of the rectangle is 29.4 centimeters.

b) The uncertainty in its perimeter is 0.8 centimeters.

Explanation:

a) From Geometry we remember that the perimeter of the rectangle (\(p\)), measured in centimeters, is represented by the following formula:

\(p = 2\cdot (w+l)\) (1)

Where:

\(w\) - Width, measured in centimeters.

\(l\) - Length, measured in centimeters.

If we know that \(w = 6.4\,cm\) and \(l = 8.3\,cm\), then the perimeter of the rectangle is:

\(p = 2\cdot (6.4\,cm+8.3\,cm)\)

\(p = 29.4\,cm\)

The perimeter of the rectangle is 29.4 centimeters.

b) The uncertainty of the perimeter (\(\Delta p\)), measured in centimeters, is estimated by differences. That is:

\(\Delta p = 2\cdot (\Delta w + \Delta l)\)  (2)

Where:

\(\Delta w\) - Uncertainty in width, measured in centimeters.

\(\Delta l\) - Uncertainty in length, measured in centimeters.

If we know that \(\Delta w = 0.2\,cm\) and \(\Delta l = 0.2\,cm\), then the uncertainty in perimeter is:

\(\Delta p = 2\cdot (0.2\,cm+0.2\,cm)\)

\(\Delta p = 0.8\,cm\)

The uncertainty in its perimeter is 0.8 centimeters.

acceleration = change of speed / time

a = Δv / t

Since the speed remains constant, acceleration is zero.

1) 0.0 m/s

The equivalent resistance for the circuit, given that 188 ohms and 122 ohms are in parallel connection while the remaining resistors are in series connections is 1947 ohms

First, we shall obtain the equivalent resistance of 188 ohms and 122 ohms (i.e in parallel connection). Details below:

R = (R₁ × R₂) / (R₁ + R₂)

R = (188 × 122) / (188 + 122)

R = 74 ohms

Haven obtain the equivalent resistance of 188 ohms and 122 ohms, we shall determine the equivalent resistance for the circuit. Details below:

Rₜ = R₁ + R₂ + R + R₄ + R₅ (series connection)

Rₜ = 900 + 125 + 74 + 450 + 398

Rₜ = 1947 ohms

Thus, we can conclude that the equivalent resistance for the circuit is 1947 ohms

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Answer:

a) true

Explanation:

One of the important factors behind the formation of clouds is the stability of the atmosphere. Air gets condensed with the increase in the height, while it becomes warm with a decrease in its height. A stable air is the type of air that can sink. The air which has low temperature has more density than the air it is surrounded by. When clouds are formed with stable air, the clouds formed are thin and horizontal.