A 0.5 kg bird starts off flying at a height of 30 m. At this height, the system has 20 J of gravitational potential energy. If the system has a final gravitational energy of 30 J, what is the final height of the bird?

Answer:

Gravity

Explanation:

That's easy because gravity is the only thing that can pull us down that hard at that fast without anything helping it.

Answer:

kinetic energy

Explanation:

Answer:

First, remember the conservation of energy.

We can define the kinetic energy as:

K = (1/2)*m*v^2

where m is the mass, and v is the velocity.

The velocity of the person is 6m/s, and the mass is unknown.

Now, when the person rides the skateboard, this kinetic energy must remain constant, if M is the mass of the skateboard, the speed after the person rides ir will be:

K' = (1/2)*(m + M)*v'^2

Where v' is the new velocity.

In this case, we can suppose that the skateboard has really small mass compared with the person.

M < < m

then:

(m + M) ≈ m

then:

K' = (1/2)*m*v'^2 = K = (1/2)*m*v^2

from that equation, we can conclude that:

v' = v

Then if the velocity before riding the skateboard was 6m/s, then after would be also 6m/s.

The air pressure in the pressurized tank will be 24014.88 N/m²,196.2 N/m²,2084.625  N/m².

The force applied perpendicular to the surface of an item per unit area across which that force is spread is known as pressure.

It is denoted by P. The pressure relative to the ambient pressure is known as gauge pressure.

Pressure is found as the product of the density,acceleraton due to gravity and the height.

P₁=ρ₁gh₁

P₁=13,600 kg/m³×9.81 (m/s²)×0.18 m

P₁=24014.88 N/m²

P₂=ρ₂gh₂

P₂= 1000 kg/m³×9.81 (m/s²)×00.2 m

P₂=196.2 N/m²

P₃=ρ₃gh₃

P₃=850 kg/m³×9.81 (m/s²)×0.25

P₃=2084.625  N/m²

Hence,the air pressure in the pressurized tank will be 24014.88 N/m²,196.2 N/m²,2084.625  N/m².

To learn more about the pressure refer to the link;

https://brainly.com/question/356585

#SPJ4

Answer:

it should be true

Explanation:

:) hope it's right

V = 4 km/h to the west.

Based on the given information, the total distance traveled is 12 km to the East and 15 km to the West, which cancels each other out. Therefore, the net displacement is 0 km, indicating that the starting point and ending point are the same. The total time taken to travel this distance is 45 minutes.

To calculate the average velocity, we need to convert the time from minutes to hours. Since there are 60 minutes in an hour, 45 minutes is equal to 45/60 = 0.75 hours.

Average velocity is defined as displacement divided by time. In this case, the displacement is 0 km and the time is 0.75 hours. Therefore, the average velocity is 0 km/0.75 hours = 0 km/h.

The negative sign indicates that the velocity is in the westward direction. Thus, the average velocity is 0 km/h to the west.In conclusion, the average velocity based on the given scenario is 0 km/h to the west. This means that there is no net displacement over time, indicating that the object returns to its starting point.

The calculation of average velocity helps us understand the overall motion and direction of an object, providing valuable information about its movement.Velocity is a vector quantity that takes into account both magnitude (speed) and direction. In this case, the average velocity of 0 km/h indicates that there is no net displacement over time.

It suggests that the object returns to its initial position after traveling to the east and then to the west. Understanding the concept of velocity and its relationship to displacement and time can provide insights into the motion of objects and how they change their positions.

Learn more about information

brainly.com/question/33276597

#SPJ11

The work required to pitch a 6.1 oz softball at 75 ft/sec is 228.75 foot-pounds.

To calculate the work required, we can use the formula for work: Work = Force × Distance. In this case, the force is the weight of the softball and the distance is the speed at which it is pitched.

First, we need to convert the weight of the softball from ounces to pounds. Since 16 ounces equal 1 pound, the weight of the softball is 6.1 oz ÷ 16 = 0.38125 pounds.

Next, we calculate the work by multiplying the weight of the softball by the distance it is pitched. The distance is given as 75 ft/sec. Therefore, the work required is 0.38125 pounds × 75 ft = 28.59375 foot-pounds.

However, we need to account for the fact that work is the product of force and distance in the direction of force. In this case, the softball is pitched vertically upwards, so we only consider the vertical component of the force and distance. Since the vertical component of the distance is 0 (since the ball returns to its initial height), the work required to pitch the softball is 0 foot-pounds.

Therefore, the work required to pitch a 6.1 oz softball at 75 ft/sec is 0 foot-pounds.

Learn more about pitch here:

https://brainly.com/question/27128408

#SPJ11

The life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

The life expectancy of a star is determined by its mass and luminosity. The more massive and luminous the star is, the shorter its life expectancy is. Hence, using this information, we can estimate the life expectancy of the following stars:a) 0.2-solar mass, 0.01-solar luminosity red dwarfRed dwarfs are known to have the longest life expectancies among all types of stars. They can live for trillions of years.

Hence, a 0.2-solar mass, 0.01-solar luminosity red dwarf is expected to have a much longer life expectancy than the Sun. It could live for up to 10 trillion years or more.b) 3-solar mass, 30-solar luminosity starA 3-solar mass, 30-solar luminosity star is much more massive and luminous than the Sun. As a result, it will have a much shorter life expectancy than the Sun.

Based on its mass and luminosity, it is estimated to have a lifetime of around 10 million years.c) 10-solar mass, 1000-solar luminosity starA 10-solar mass, 1000-solar luminosity star is extremely massive and luminous. It will burn through its fuel much faster than the Sun, resulting in a much shorter life expectancy. Based on its mass and luminosity, it is estimated to have a lifetime of only around 10 million years as well.

Therefore, the life expectancy of the given stars are:a) 0.2-solar mass, 0.01-solar luminosity red dwarf: 10 trillion yearsb) 3-solar mass, 30-solar luminosity star: 10 million yearsc) 10-solar mass, 1000-solar luminosity star: 10 million years.

Learn more about luminosity here,

https://brainly.com/question/20308478

#SPJ11

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

where

f is the force

m is the mass

From the question we have

\(a = \frac{20}{5} \\ \)

We have the final answer as

Hope this helps you

Answer:

Dynamos and Generators convert mechanical rotation into electric power.

Dynamo - a device that makes direct current electric power using electromagnetism

Generator - used to describe an alternator that creates AC power using electromagnetism.

Explanation: so dynamo makes direct electric power using electromagnetism. A generator creates AC power using electromagnetism

8n downwards

since downwards force is greater than upwards just minus

Answer:

6 kg

Explanation:

p = mv

In a tensile force measurement using a strain gauge, the strain gauge is typically attached to the surface of the material experiencing the tensile force. The strain gauge is a resistive sensor that changes its electrical resistance in response to the deformation or strain of the material.

When a tensile force is applied to the material, it causes the material to deform. This deformation results in a change in the length and cross-sectional area of the material. The strain gauge, being bonded to the surface of the material, also experiences this deformation, which causes a change in its resistance.
The relationship between the change in resistance (∆R) and the tensile force (P) can be derived using the concept of strain and the gauge factor (GF) of the strain gauge. The gauge factor is a constant that represents the sensitivity of the strain gauge and is typically provided by the manufacturer.
The relationship is given by the equation:
∆R = GF * R * ε
Where:
∆R is the change in resistance of the strain gauge,
GF is the gauge factor of the strain gauge,
R is the initial resistance of the strain gauge,
ε is the strain experienced by the material.
To determine the change in resistance for a strain gauge installed on a beam being pulled axially by a 50 kN tensile force, additional information is required. Specifically, the length of the beam and the modulus of elasticity (E) of the material. With this information, the strain (ε) can be calculated using the equation
ε = δL / L
Where:
δL is the change in length of the beam,
L is the initial length of the beam.
Once the strain is determined, the change in resistance can be calculated using the derived relationship ∆R = GF * R * ε, where GF and R are given as 2 and 1200, respectively.

To learn more about, Strain Gauge, click here, https://brainly.com/question/32087166

#SPJ11

Answer:

atoms

Explanation:

they are the smallest

Answer:

What is 2 celsius in fahrenheit

35.6

2°C is equal to 35.6°F. We convert temperature from Celsius (°C) to Fahrenheit (°F), using the following formula: °F = (°C * 9/5) + 32

To convert temperatures in degrees Celsius to Fahrenheit, multiply degree Celsius by 1.8  and then add 32 and  1° Celsius is equivalent to 33.8° Fahrenheit.

To convert temperature from Celsius (°C) to Fahrenheit (°F), you can use the following formula:

°F = (°C * 9/5) + 32

Putting in given 2 °C:

°F = (2 * 9/5) + 32

°F = 36.5 °F

So, 2 °C is equal to 36.5 °F.

To know more about temperature conversion, refer

brainly.com/question/30391112

#SPJ4

Answer:

Q = 8608.8 J

Explanation:

Given that,

The mass of ice, m = 34 g

The temperature changes from -2°C to 118°C​.

The specific heat of ice, c = 2.11 J/g°C

The heat energy needed,

\(Q=mc\delata T\\\\Q=34\times 2.11\times (118-(-2))\\Q=8608.8\ J\)

So, 8608.8 J of energy is needed.

if a neutron star is observed to be a pulsar or part of an X-ray binary system, it is likely that its angular momentum has been changed by its binary companion.

Neutron stars are incredibly dense objects that form from the remnants of massive stars after a supernova explosion. Some neutron stars are found in binary systems, where they orbit around another star or neutron star. In these systems, the neutron star's angular momentum can be affected by its companion star, leading to various observable phenomena.

One example is a pulsar, which is a rapidly rotating neutron star that emits beams of electromagnetic radiation from its magnetic poles. These beams can be observed as regular pulses of radiation as the pulsar rotates. If a neutron star is observed to be a pulsar in a binary system, it is likely that its angular momentum has been changed by its companion star.

Another example is an X-ray binary, which is a binary system in which one of the stars is a neutron star or black hole. In these systems, matter from the companion star is accreted onto the neutron star or black hole, emitting X-rays in the process. The accretion process can also change the angular momentum of the neutron star.

Therefore, if a neutron star is observed to be a pulsar or part of an X-ray binary system, it is likely that its angular momentum has been changed by its binary companion.

Learn more about angular momentum at: https://brainly.com/question/29512279

#SPJ11

Answer:

The answer to this question would be 3.6 m/s

Answer:

B

Explanation:

Answer:

B. is the correct option! The person above was correct :)

Explanation:

Have a great day!

The rate of water expressed in ft³/s is: 0.1423 ft³/s

To solve this problem, we have to do the conversion of units with the given information.

Information about the problem:

By Converting the units from (gal/min) to (ft³/s), we get:

rate of water = 63.9 gal/min * 1 ft³/7.481 gal * 1 min/60 s

rate of water =0.1423 ft³/s

It is the transformation of a value expressed in one unit of measurement into an equivalent value expressed in another unit of measurement of the same nature.

Learn more about unit conversion at: brainly.com/question/141163

#SPJ4

Answer:

the average current is 8000 A

Explanation:

I got it answered by an expert

Answer:

3.605551275463989

Explanation:

solve using Pythagorean theorem

Answer:

kilogram (kg)

Explanation:

Answer:

270 s or 4.5 min

Explanation:

First find the amount of heat needed:

q = mCΔT

q = (1.5 kg) (4200 J/kg/K) (100 − 15) K

q = 535,500 J

q = 535.5 kJ

Power is energy per time.

P = E / t

2 kW = 535.5 kJ / t

t = 270 s

The total area through which there is flux in terms of the cylinder's cross-sectional area A is 2A.

Flux describes any effect that appears to pass or travel through a surface or substance. Flux is a concept in applied mathematics and vector calculus that has many applications to physics.

To find the total area through which there is flux in terms of the cylinder's cross-sectional area A, we need to consider both the top and bottom surfaces of the cylinder.

Identify the cross-sectional area of the cylinder, which is given by A.

Recognize that there are two surfaces through which flux occurs, the top and bottom surfaces of the cylinder.

Since both surfaces have the same cross-sectional area, A, we can simply add them together to find the total area through which there is flux.

Total Area = Top Surface Area + Bottom Surface Area
Total Area = A + A = 2A

Learn more about area:

https://brainly.com/question/25292087

#SPJ11

To create a diffuse sound field within a theater, the goal is to distribute sound energy evenly throughout the space, reducing the presence of distinct echoes and reflections.

Among the given options, the treatment that would best contribute to this acoustic characteristic is:

(c) Velvet curtains hung on the side walls of the theater.

Velvet curtains have a soft and textured surface that can absorb and scatter sound waves, preventing them from reflecting directly back into the audience or creating focused sound reflections. This helps to reduce the presence of strong reflections and echoes, promoting a more diffuse sound field within the theater.

Learn more about diffuse sound field  here:

https://brainly.com/question/18534026

#SPJ11

Answer:

\(5.8\; {\rm kg\cdot m \cdot s^{-1}}\).

Explanation:

If the mass of an object is \(m\) and the velocity of that object is \(v\), the linear momentum of that object would be \(m\, v\).

Assume that the initial velocity of the mass is positive (\(6.0\; {\rm m\cdot s^{-1}}\).) However, the direction of the velocity is reversed after the impact. Thus, the sign of the new velocity of the object would be negative- the opposite of that of the initial velocity. The new velocity would be \((-4.0\; {\rm m\cdot s^{-1}})\).

Thus, the change in the velocity of the mass would be:

\(\begin{aligned}& (\text{Change in Velocity}) \\ =\; & (\text{Final Velocity}) - (\text{Initial Velocity}) \\ =\; & (-4.0\; {\rm m\cdot s^{-1}}) - (6.0\; {\rm m\cdot s^{-1}}) \\ =\; & (-10\; {\rm m\cdot s^{-1})\end{aligned}\).

The change in the linear momentum of the mass would be:

\(\begin{aligned} & \text{change in momentum} \\ =\; & (\text{mass}) \times (\text{change in velocity}) \\ =\; & 0.58\; {\rm kg} \times (-10\; {\rm m\cdot s^{-1}}) \\ =\; & (-5.8\; {\rm kg \cdot m \cdot s^{-1}})\end{aligned}\).

Thus, the magnitude of the change of the linear momentum would be \(5.8\; {\rm kg \cdot m \cdot s^{-1}}\).

Gases such as carbon dioxide (CO2) play a crucial role in climate and weather patterns.Carbon dioxide, along with other greenhouse gases like methane and water vapor, helps trap heat in the Earth's atmosphere, leading to the greenhouse effect.

This effect is essential for maintaining a habitable temperature on Earth. Without greenhouse gases, the planet would be too cold to support life.

However, the increased concentration of greenhouse gases, primarily due to human activities like burning fossil fuels, has led to an enhanced greenhouse effect, resulting in global warming. The rise in CO2 levels has been directly linked to the increase in average global temperatures and climate change.

Moreover, changes in CO2 levels can affect weather patterns and climate systems. The absorption and release of heat by the atmosphere, influenced by greenhouse gases, contribute to the formation of weather systems such as storms, precipitation patterns, and wind patterns.

Therefore, gases like carbon dioxide are indeed important factors in climate and weather, and their concentrations and effects are subjects of significant scientific study and concern.

Learn more about atmosphere here

https://brainly.com/question/30157320

#SPJ11