Which statement is true of velocity but not speed?
O A. It is calculated using displacement.
O B. It is calculated using time.
O C. It is calculated using distance.
O D. It is calculated using acceleration.
SUBMIT

Answer:huh

Explanation:

Answer:

(a) 153.37 g

(b) 5705 kJ

Explanation:

(a) To find the amount of bean needed by a man you first calculate the equivalence in beans to 2500kJ

\(2500kJ*\frac{100g}{1630kJ}=153.37\ g\)

Thus, 153.37 g has the energy needed by a man that needs 200kJ per day.

(b) The amount of energy per pot of bean is given by:

\(E=350g*\frac{1630kJ}{100g}\\\\E=5705\ kJ\)

Thus, the energy is 5705kJ

Answer:

W = 66 J

Explanation:

Given that,

The weight of the box, W = 44 N

It is placed on a shelf that is 1.5 m above the ground.

We need to find the work done in lifting the box.

We know that,

Work done, W = Fd

So,

W = 44 N × 1.5 m

= 66 J

So, the required work done is equal to 66 J.

It's worth noting that this is a rough estimate and the actual number of 600 nm photons emitted by a 100 watt light bulb could be different depending on the specific characteristics of the light bulb and the conditions under which it is used is 45 photons per second.  

The amount of light emitted by a 100 watt light bulb is typically measured in lumens. One lumen is the amount of light that would travel through a one-square-foot area if that area were one foot away from the source of light.

The wavelength of light is an important factor in determining how much light is emitted. Light with shorter wavelengths, such as blue or violet light, has more energy than light with longer wavelengths, such as red or orange light.

The number of 600 nm photons emitted by a 100 watt light bulb, we need to know the intensity of the light in terms of lumens per steradian. The lumens per steradian can be calculated by dividing the total lumens by the area of the light source.

For a 100 watt light bulb, the lumens per steradian can be estimated to be around 1200 lumens per steradian.

We can then calculate the number of 600 nm photons emitted by multiplying the lumens per steradian by the fraction of the electromagnetic spectrum that is made up of 600 nm light. According to the CIE standard, the spectral luminous efficiency of a 100 watt incandescent light bulb is around 15 lumens per watt for light in the visible range, and 0.3% of the light is in the 600 nm range.

Therefore, the number of 600 nm photons emitted by a 100 watt light bulb can be calculated as follows:

Number of 600 nm photons = Intensity of light in lumens per steradian x Fraction of electromagnetic spectrum made up of 600 nm light x Lumens per watt for light in the visible range

Number of 600 nm photons ≈ 1200 lumens per steradian x 0.003 x 15 lumens per watt

Number of 600 nm photons ≈ 45 photons per second

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Answer:gravity

Explanation:

gravity holds the planets in its orbit

Answer:

Newton's first law is called the law of inertia.

Explanation:

Explanation:

use the formula

speed = frequency x wavelength

330 = frequency x 0.372

330 / 0.372 = frequency

887 Hz = frequency

hope this helps, please mark it brainliest

Answer:

In physics and engineering, a resultant force is the single force and associated torque obtained by combining a system of forces and torques acting on a rigid body. The defining feature of a resultant force, or resultant force-torque, is that it has the same effect on the rigid body as the original system of forces.

I hope it's helpful!

Answer:

it is a force that result in anything to be done

Answer:

\(F_t=(4.64i+20j)N\)

Explanation:

Force in this problem is a vector quantity, so:

\(x_1=F_1[cos(\theta_1)]\\y_1=F_1[sin(\theta_1)]\)

and

\(x_2=F_2[cos(\theta_2)]\\y_2=F_2[sin(\theta_2)]\)

For this problem:

\(F_1=30N\\F_2=40N\)

\(\theta_1=180\)°=\(\frac{pi}{2}\)

\(\theta_2=30\)°=\(\frac{pi}{6}\)

The net force (\(F_t\)) is equal to the sum of the forces:

\(F_t=F_a+F_b\\\\F_a=30N[cos(\frac{\pi}{2})i+sin(\frac{\pi}{2})j]\\F_a=30N(-1i+0j)\\F_a=-30Ni\\\\F_b=40N[cos(\frac{\pi}{6})i+sin(\frac{\pi}{6})j]\\F_b=40N(\frac{\sqrt3}{2}i+\frac{1}{2}j)\\F_b=(20\sqrt3i+20j)N\\F_b=(34.64i+20j)N\\\\F_t=[(-30i)+(34.64+20j)]N\\F_t=(4.64i+20j)N\)

Hope that helps.

Answer:

45.31 J

Explanation:

We are given that

Mass of baseball , m=0.145 kg

Initial velocity, u=0

Final velocity, v=25 m/s

We have to find the work done on the baseball to bring it from rest to 25 m/s

We know that

Work done = Change in kinetic energy

Work done, W=\(\frac{1}{2}m(v^2-u^2)\)

Using the formula

Work done, W\(=\frac{1}{2}(0.145)((25)^2-0)\)

Work done=\(\frac{1}{2}(0.145)(625)\)

Work done, W=45.31 J

Hence, the work done on the baseball to bring it from rest to 25 m/s

=45.31 J

The term that defines the point at which an object will not accelerate any more is called "equilibrium" or "static equilibrium."

In physics, equilibrium refers to a state in which an object experiences a balance of forces and torques, resulting in zero net acceleration. There are two types of equilibrium: static equilibrium and dynamic equilibrium.

Static equilibrium specifically refers to a state in which an object is at rest or remains at a constant velocity. In static equilibrium, the object's acceleration is zero, meaning there is no net force acting on it and no tendency to change its state of motion.

To achieve static equilibrium, the sum of the forces acting on the object must be zero (ΣF = 0), and the sum of the torques (or moments) acting on it must also be zero (Στ = 0). These conditions ensure that the object is balanced and not subject to any unbalanced forces or torques that would cause it to accelerate.

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The thermal efficiency of the given heat engine is 47%, while the thermal efficiency of the corresponding Carnot cycle is 58.24%. The heat engine falls short of the Carnot efficiency, suggesting inefficiencies or design limitations.

(a) To determine the thermal efficiency of the given heat engine, we can use the formula:

Thermal Efficiency = (Net Work Output / Heat Input) * 100

The net work output can be calculated by subtracting the heat rejected from the heat input:

Net Work Output = Heat Input - Heat Rejected

Given:

Heat Input = 500 kW

Heat Rejected = 265 kW

Substituting these values into the formula, we have:

Net Work Output = 500 kW - 265 kW = 235 kW

Now, we can calculate the thermal efficiency:

Thermal Efficiency = (235 kW / 500 kW) * 100 = 47%

Therefore, the thermal efficiency of this cycle is 47%.

(b) The Carnot cycle is an idealized reversible heat engine that operates between two heat reservoirs. Its thermal efficiency can be determined using the formula:

Thermal Efficiency Carnot = 1 - (T_low / T_high)

Given:

T_low = 50°C + 273.15 = 323.15 K

T_high = 500°C + 273.15 = 773.15 K

Substituting these values into the formula, we have:

Thermal Efficiency Carnot = 1 - (323.15 K / 773.15 K) ≈ 0.5824 (58.24%)

Therefore, the thermal efficiency of the corresponding Carnot cycle is approximately 58.24%.

(c) Comparing the thermal efficiency of the given heat engine (47%) with the thermal efficiency of the Carnot cycle (58.24%), we can conclude that the heat engine is less efficient than the corresponding Carnot cycle. In theory, the maximum efficiency any heat engine can achieve is the Carnot efficiency when operating between the same temperature limits. The given heat engine falls short of the Carnot efficiency, indicating that it is not operating at the maximum possible efficiency.

This comparison suggests that the given heat engine may not be feasible or ideal. It could be due to factors such as irreversibilities, inefficiencies in the conversion of heat to work, or losses in the system. Improving the design or addressing these inefficiencies would be necessary to approach the ideal efficiency of the Carnot cycle.

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Answer: The dimensions of wellness do not influence each other.

Explanation: The answer is true.

False im sure. correct me if im wrong.

The bulk modulus of water, which is approximately 2.2 GPa divided by 64.

To determine the pressure on the water balloon after its radius is reduced by one fourth, we can use the relationship between pressure and the change in volume of a material under compression, as described by the bulk modulus.

The bulk modulus (K) of water represents its resistance to compression and is approximately 2.2 GPa (gigapascals).

When the radius of the water balloon is reduced by one fourth, its volume decreases by a factor of (1/4)^3 = 1/64. This means that the new volume is 1/64 of the original volume.

The change in volume (∆V) can be calculated as (∆V) = (1/64) * V, where V is the original volume.

Using the equation for pressure, P = (∆V/V) * K, we can substitute the values:

P = ((1/64) * V) / V * K

P = (1/64) * K

Therefore, the pressure on the water balloon after its radius is reduced by one fourth would be approximately 1/64 of the bulk modulus of water, which is approximately 2.2 GPa divided by 64.

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The consequences of different speeds of light in different media include mirages, rainbows, and the brilliant colors of diamonds. Therefore, the correct option is D) all of the above.

When light travels through different media, its speed can change. This change in speed leads to various optical phenomena and consequences. Mirages occur due to the bending of light as it passes through air layers with different refractive indices, caused by temperature gradients. This bending creates the illusion of objects appearing in locations where they are not actually present, such as seeing water on a hot road. Rainbows are formed when sunlight is refracted, reflected, and dispersed by water droplets in the atmosphere. The different speeds of light in the droplets cause the light to separate into its constituent colors, resulting in the formation of a colorful circular arc.

The brilliant colors of diamonds and other gemstones are due to the phenomenon called dispersion. Different wavelengths of light have different speeds when passing through the gemstone, causing them to separate and produce a range of colors. Therefore, all of the given options (mirages, rainbows, and the brilliant colors of diamonds) are consequences of different speeds of light in different media.

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The density of lead is 11.4 g/cm3 at 25°C and the volume occupied by 25.0 g of lead is 2.19 cm3. Hence, option A is the correct option.

The formula to calculate the volume (V) of a substance is:

V = m / ρ

Here, m is the mass of the substance and ρ is its density so in this case, we have:

m = 25.0 g

ρ = 11.4 g/cm3

Putting these values into the formula:

V = 25.0 g / 11.4 g/cm3

V = 2.19 cm3

Therefore, the volume occupied by 25.0 g of lead is 2.19 cm3.

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Answer:

Examples of balanced forces

Resting against a wall.

Lying down.

Aircraft in a steady-flight.

Floating in water.

Standing in ground.

Tug of war equally balanced teams.

Fruit hanging from a tree.

Ball hanging from a rope.

Answer:

b

Explanation:

Answer:

B

Explanation:

Answer:

4 to 5

Explanation:

Answer:

mass, weight

Explanation:

mass is constant, and weight is dependant on your location

Answer:

I think d

Explanation:

because distance j

has to be the last one that's the only one with distance

Answer:

B. oxygen

Explanation:

Answer:

it's oxygen lolllllllllllll they kinda need it

Explanation:

The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.

Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.

The distance traveled with the wind in 3 hours is 408 miles.

Therefore, we can write the equation as:

3(x + y) = 408

Divide both sides by 3:

x + y = 136  .... (1)

The distance traveled against the wind in 4 hours is also 408 miles.

Therefore, the equation can be written as:

4(x - y) = 408

Divide both sides by 4:

x - y = 102  .... (2)

Now we can solve these two equations using the elimination method.

Add equations (1) and (2):

x + y + x - y = 136 + 1022x = 238x = 119 mph

Therefore, the speed of the plane in still air is 119 mph.

Now, substitute this value of x in equation (1):

119 + y = 136y = 17 mph

Therefore, the speed of the wind is 17 mph.

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The correct question is:

A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?

F = ma, or force equal to mass times acceleration, is Newton's second law of motion.

Second Law of Movement by Newton Since it shows how powers and movement are connected, F=ma is essential. You can use it to determine an object's velocity and position, as well as its acceleration with known forces. For inventors, scientists, and engineers, This is extremely helpful.

As per Newton's Second Law of Movement, when a power works on a mass, the mass speeds up (gains speed) (object). When you ride a bicycle, you can see this law of motion in action in a great way. Your bike makes up the mass. Your leg muscles press against the bicycle's pedals to produce the force.

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Increase at the same rate as the growth in the money supply.

One of the schools of Western economic thinking that evolved in the 16th and 17th century in monetary economics is the quantity theory of money. According to the QTM, the overall level of prices for goods and services is inversely correlated with the money supply.

Keynesian economists contested the idea, but Milton Friedman and the monetarist school of thought updated and revitalised it. The direct correlation between the money supply and price level does not hold, according to the theory's detractors, since money velocity is unstable and prices are sticky in the short term. According to conventional macroeconomic theory, the CPI-based measure of inflation is unaffected by changes in the money supply.

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The similarity between the last time the globe warmed and the climate change occurring today is that both are caused by the emission of greenhouse gases into the atmosphere.

Greenhouse gases trap heat from the sun in the atmosphere, causing the earth's temperature to increase. The difference between the two is that the current warming is happening much faster than the last time the globe warmed. This is largely due to the amount of greenhouse gases that have been released into the atmosphere since the industrial revolution. In addition, the current warming is affecting the global climate in more extreme ways than the last time the globe warmed, with more frequent and intense storms, droughts, and heatwaves.

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a) Separately Excited DC Generator: It is an electric device that transforms mechanical power into electrical power. A separately excited generator (SExG) is a type of direct current (DC) generator that is used to supply DC power to external loads.

The field winding is independent and requires a separate DC source for excitation. Connection Diagram:Power Delivered to Load = VLoad * ILoadb) Self-Excited DC Generator:

Self-excited generators are those in which the field current is generated by the generator itself. The Self-excited generators are classified into three types, as follows:

1. Series-wound generators

2. Shunt-wound generators

3. Compound-wound generators

Series-wound generators: In a series-wound generator, the field winding is connected in series with the armature winding. Series-wound generators are seldom used because they can easily self-destruct if the load current exceeds its limits. The diagram of the series-wound generator is as follows:

Shunt-wound generators: In a shunt-wound generator, the field winding is connected in parallel with the armature winding. Shunt-wound generators are frequently employed in low-power applications. The diagram of the shunt-wound generator is as follows:

Compound-wound generators: In a compound-wound generator, both series and shunt winding are employed to improve its characteristics. The diagram of the compound-wound generator is as follows:

c) Losses in a DC machine: There are two types of losses in DC machines:

1. Copper losses

2. Iron losses Copper Losses: These are divided into two types, namely armature copper loss and field copper loss. Armature Copper Loss (I2R) = IA2RA

Field Copper Loss (I2R) = If2RA

Iron Losses: These losses are divided into two categories, namely hysteresis loss and eddy current loss. These are also known as core losses or iron losses.

The sum of these two is known as the total iron loss.d) Remanence: Remanence is the magnetic flux density B remaining in a magnetic circuit after the magnetizing force has been removed. It is expressed as the ratio of residual magnetic flux density (B) to magnetic field strength (H) after the removal of magnetizing force.

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Answer:

kinectic energy-in physics kinetic energy of an object is the energy that it possesses due to its motion

potential energy-in physics potential energy is the energy held by an object because of its position relative to other objects,its electric charge,or other factors

Answer:

Hey!

Well KINETIC ENERGY is...

the energy generated by the / of the object is that it possesses due to its motion...

POTENTIAL ENERGY is...

The energy held by an object because of its position relative to other objects,  its electric charge, or other factors...

Explanation:

So in easier terms, KINETIC ENERGY is just the ENERGY GENERATED BY THE OBJECT'S MOVEMENT and...

POTENTIAL ENERGY IS THE TOTAL AMOUNT OF ENRGY THAT THE OBJECT HOLDS (due to an electric charge etc)

Hope this helps!

Answer: it  is proposes that in Earth's prebiotic history, simple organic matter was exposed to energy in the form of volcanoes and electrical storms

Explanation:

Answer:

40.8 m/s

Explanation:

We can use the kinematic equation that relates the final velocity (Vf) of an object dropped from rest to the distance it has fallen (h) and the acceleration due to gravity (g):

Vf^2 = 2gh

where g is the acceleration due to gravity, which is approximately 9.8 m/s^2.

Plugging in the given values, we get:

Vf^2 = 2 * 9.8 m/s^2 * 85 m

Vf^2 = 1666

Vf = sqrt(1666) ≈ 40.8 m/s

Therefore, the baseball will hit the ground with a speed of approximately 40.8 m/s.