how much energy does the battery supply in 3 h ? express your answer to three significant figures and include the appropriate units

Answer:

423 is the answer

I don't know the real. answer

Answer:

a=14m/s^2

Explanation:

F=ma

42N=3kg*a

a=14m/s^2

ANSWER

EXPLANATION

We want to find out how wings help a plane to fly.

The wings of an airplane are there to help lift the plane. They are shaped to make air move faster over the wings.

They are used for lifting, landing, turning and controlling the airplane. The curve on the wings make the air move faster than the air at the bottom of the wings which appropriates Bernoulli's principle to push the plane into the air.

Answer:

1840 J

Explanation:

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

Specific heat capacity (C) = 0.46 J/gºC

Mass (M) = 50 g

Initial temperature (T₁) = 20 °C

Final temperature (T₂) = 100 °C

Heat (Q) required =?

Next, we shall determine the change in the temperature. This can be obtained as follow:

Initial temperature (T₁) = 20 °C

Final temperature (T₂) = 100 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 100 – 20

ΔT = 80 °C

Finally, we shall determine the heat required. This can be obtained as follow:

Specific heat capacity (C) = 0.46 J/gºC

Mass (M) = 50 g

Change in temperature (ΔT) = 80 °C

Heat (Q) required =?

Q = MCΔT

Q = 50 × 0.46 × 80

Q = 1840 J

Thus, 1840 J of heat energy is required.

Initial velocity,u = 26 m/s

Final velocity,v = 18 m/s

Acceleration,a = -2 m/s²

Calculate the time take by a body.

According to the first equation of motion:

\( \bf \: v = u + at\)

★ Substituting the values in the above formula,we get:

\( \sf\implies18 = 26 + ( - 2) \times t\)

\( \sf \implies18 = 26 - 2t\)

\( \sf \implies \: 2t = 26 - 18\)

\( \sf \implies \: 2t = 8\)

\( \sf \implies \: t = \cancel\dfrac{8}{2} \)

\( \sf \implies \: t = 4 \: sec\)

Acceleration is the rate of change in velocity. Here, the change in velocity is 8 m/s and the acceleration is  - 2 m/s². The time taken to change the velocity is thus, 4 seconds.

Acceleration is the ratio of the change in velocity to the change in time. Acceleration is a vector quantity having both magnitude and direction. The change in direction or magnitude of velocity makes an acceleration on the object.

The relation between acceleration, velocity and time is given by the expression:

v = u  + at

where, v is the final velocity and u be the initial velocity. a and t be the acceleration and time.

Given that, final velocity = 18 m/s

initial velocity = 26 m/s

acceleration =  - 2 m/s²

then t = ( v - u ) / a

          = (18 - 26 m/s) / -2 m/s²

          = 4 s

Therefore, the time taken  for the vehicle to slow down is 4 seconds.

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yes the answer is force

Explanation:

Force is a push or pull which can change the state of body whether it is rest or in motion or tries to change the state of body.

Answer:

A. 0.5m/s².

B. –0.5m/s².

C. –0.5m/s².

D. 100m.

Explanation:

A. Determination of the acceleration in the first 20s.

Initial velocity (u) = 0

Final Velocity (v) = 10m/s

Time (t) = 20secs.

Acceleration (a) =..?

Acceleration = change in Velocity /time

a = (v – u)/t

a = (10 – 0)/20 = 10/20

a = 0.5m/s²

Therefore, the acceleration of the cyclist in the first 20secs is 0.5m/s²

B. Determination of the acceleration between 20 and 30s. This can be obtained as follow:

Initial velocity (u) = 10m/s

Final Velocity (v) = 5m/s

Time (t) = 30 – 20 = 10s

Acceleration (a) =..?

Acceleration = change in Velocity /time

a = (v – u)/t

a = (5 – 10)/10 = –5/10

a = –0.5m/s²

Therefore, the acceleration of the cyclist between the 20 and 30secs is

–0.5m/s².

C. Determination of the acceleration in the last 10s.

Initial velocity (u) = 5m/s

Final Velocity (v) = 0

Time (t) = 10s

Acceleration (a) =..?

Acceleration = change in Velocity /time

a = (v – u)/t

a = (0 – 5)/10 = –5/10

a = –0.5m/s²

Therefore, the acceleration of the cyclist between the last 10secs is

–0.5m/s².

D. Determination of the distance travelled by the cyclist when he was moving at a constant speed.

Velocity (v) = 5m/s

Time (t) = 50 – 30 = 20secs

Displacement (d) =?

Velocity = Displacement /Time

v = d/t

5 = d/20

Cross multiply

d = 5 x 20

d = 100m

Therefore, the distance travelled by the cyclist at constant speed is 100m

The structure indicated in this 32-day embryo will eventually become an upper limb. The correct option is C.

Based on the provided image of a 32-day embryo, the structure indicated appears to be a developing limb bud. Limb buds are small, protruding growths that emerge from the embryo and ultimately differentiate into limbs as development progresses.

During the embryonic development, the upper limb buds begin to form around day 26 to 27, while the lower limb buds appear around day 28 to 30. The 32-day mark falls within the timeline for upper limb development, which supports the conclusion that this structure will eventually become an upper limb.

The other options are not accurate in this context. The structure will not disappear (A), as it plays a crucial role in the formation of the upper limb. It will also not become a lower limb (B), as the development timeline for lower limbs occurs slightly later. The structure will not fuse to form the abdominal wall (D) or form the umbilical cord (E), as these have different embryonic origins and developmental pathways.

Hence, The correct option would be C: become an upper limb.

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Answer:

To compare these temperatures, we need to convert them to the same unit of temperature.

To convert Celsius (°C) to Kelvin (K), we add 273.15 to the Celsius value.

40°C + 273.15 = 313.15 K

To convert Fahrenheit (°F) to Celsius (°C), we can use the formula:

°C = (°F - 32) * 5/9

So,

40°F = (40 - 32) * 5/9 = 4.44°C

Now, we can convert 4.44°C to Kelvin using the formula:

4.44°C + 273.15 = 277.59 K

So the order from smallest to largest temperature is:

40°F < 4.44°C < 40°C < 277.59 K

Therefore, 40K is the greatest temperature among the three.

According to the kinetic molecular theory, the temperature of a material is proportional to the total kinetic energy of its particles. The average kinetic energy for 1.00 mol he atoms at 300 K is 3741.3 J mol⁻¹.

The average energy possessed by the gas particles which are in motion is defined as the average kinetic energy. The average kinetic energy of the gas molecules is proportional to the absolute temperature of the gas.

The equation of average kinetic energy for one mole of any gas is:

Average kinetic energy = 3/2 nRT

3/2 × 1 × 8.314 × 300

= 3741.3 J mol⁻¹

Thus the average kinetic energy for 1.00 mol He atoms is 3741.3 J mol⁻¹.

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The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.

Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.

The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.

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The initial speed of the sled  given a shove up a frictionless 23.0° incline up the slope is 4.904 m/s.

Given that sled is given a shove up a frictionless 23.0° incline. It reaches a maximum vertical height 1.22 m higher than where it started. Now, we are going to find the initial speed of the sled up the slope.

The initial speed of the sled is given as,Initial speed = ?The given incline angle, θ = 23.0°Vertical height = h = 1.22 mNow, we can find the initial speed of the sled by using the conservation of energy.

Conservation of energyThe total energy of the sled is the sum of its potential and kinetic energy.

Initial energy (Ei) = mgh Kinetic energy (Ek) = 0Total energy (Et) = Ei + EkFinal energy (Ef) = mgh + 1/2mv²By law of conservation of energy,

Initial energy (Ei) = Final energy (Ef)mgh = mgh + 1/2mv² - - - - - - - - - - - - - - - - - - - (1)On simplifying equation (1), we get1/2mv² = mghv² = 2ghv = √2gh = √2 x 9.8 m/s² x 1.22 m [Since, g = 9.8 m/s²]v = √(2 x 9.8 x 1.22) m/sv = √(24.04) m/sv = 4.904 m/s

Therefore, the initial speed of the sled up the slope is 4.904 m/s.

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Answer:

The right solution is "2.5 m/s²". A further explanation is given below.

Explanation:

The given values are:

Initial velocity,

= 20 m/s

Final velocity,

= 0 m/s

Time,

= 8 s

As we know,

⇒  \(Acceleration=\frac{Final \ velocity-Initial \ velocity}{2}\)

On substituting the values, we get

⇒                       \(=\frac{0-20}{8}\)

⇒                       \(=\frac{-20}{8}\)

⇒                       \(=-2.5 \ m/s^2\)

Answer:

Jupiter

Explanation:

Jupiter is the largest planet in our solar system and is about 11 times larger than earth.

Answer:

4.72 m/s

Explanation:

If an electron vibrates back and forth in an clean wire with a frequency of 60.0 Hz, then it will make 2.2×10⁵ cycles. in 1.0 h. Hence option D is correct.

Electric charge is the physical property of matter that experiences force when it is placed in electric field. F = qE where q is amount of charge, E = electric field and F = is force experienced by the charge. there are two types of charges, positive charge and negative charge which are generally carried by proton and electron resp. like charges repel each other and unlike charges attract each other. the flow charges is called as current. Elementary charge is amount of charge a electron is having, whose value is 1.602 x 10⁻¹⁹ C

Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform. There are two types of the wave longitudinal wave and transverse wave.

Frequency is nothing but the number of oscillation in a unit time.

Given,

frequency f = 60.0 Hz.

time t = 1.0 h = 60*60 = 3600s

F = number of cycles/time

number of cycles = F×time

The number of cycles in 1 Hr is

60*3600 = 2.2×10⁵ cycles.

Hence option D is correct.

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The movement of the plates may lead to or cause an earthquake.

At convergent boundaries, two tectonic plates are moving towards each other. There are three types of convergent boundaries, characterized by the type of plates involved: Oceanic-Oceanic Convergence, Oceanic-Continental Convergence, Continental-Continental Convergence.

At divergent boundaries, two tectonic plates are moving away from each other. This type of boundary is often associated with seafloor spreading, where new crust is formed as magma rises to the surface and solidifies. Divergent boundaries on land can result in the formation of rift valleys and volcanoes.

At transform boundaries, two tectonic plates are sliding past each other. These boundaries are characterized by lateral movement and can result in earthquakes

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Answer:

f=2.3x10^2 Hz

T=??

T=1/f=1/2.3x10^2=4.3x10^-3

Explanation:

Correct Answer:

A. 4.3 x 10-3 seconds

Answer:

increases your heart rate

Explanation:

Warming up increases your heart rate and therefore your blood flow which enables more oxygen to reach your muscles.

Both the initial amount and the kind of gas play a role.  However, the pressure and the quantity of gas present also have a role in this relationship.

Charles' Law states that a gas's volume is directly proportionate to its temperature. However, the pressure and the quantity of gas present also have a role in this relationship. Hence, we would need to know the starting volume, pressure, and number of moles of a gas sample in order to calculate its volume at 50.0 °C. The type of gas would also be a role in deciding its final volume at 50.0 °C because different gases behave differently at various temperatures.  Ideal gas perfectly obeys the gas law. Thus, the correct answer to the question is Ideal gas.

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Answer: 17 hours

Explanation:

Answer:

a

Explanation:

i think

Answer:

73.34 mph to 2dp

Explanation:

veolcity = distance/ time

55 / 0.75 = 73.34 mph

When an object is placed on the surface of two planets that have the same mass but are very different in size, then the the object would experience a greater gravitational pull on the smaller planet.

What is the weight of an object and what is acceleration due to gravity?

Weight of an object:

        W = mg

Where;

The object's mass is m.

Gravitational acceleration, or g, is measured.

Acceleration due to gravity, g:

The square of the distance from the planet's core and the acceleration caused by gravity, or g, are inversely proportional. Likewise, if there were two planets with the same mass but different sizes. Take into account the fact that planet A's radius is smaller than planet B's radius. This implies that the planet A's g will be higher than the planet B's g. Since the object's mass is constant, the weight of the object on planet A will be higher than the weight of the object on planet B.

Hence, The object would experience a greater gravitational pull on the smaller planet.

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Answer:

Current ?     .2 amps

Explanation:

V=IR

5 = I * (20+5)

I= .2 amps

Answer:

The angle that will have the most range (Goes further) will be the one that is shot with 60 ° with the horizontal.

Since the one that shoots with respect to the vertical, it will only reach higher. And it won't go as far as the horizontal.

Greetings.

Danna.

The mechanical energies that have changed in this system are gravitational potential energy and spring potential energy. External work and changes in thermal energy are not involved in this scenario.

What is Mechanical energy?

Mechanical energy refers to the sum of potential energy and kinetic energy present in a mechanical system. It represents the energy associated with the motion and position of objects within the system.

Kinetic Energy: Kinetic energy is the energy possessed by an object due to its motion. It depends on the mass of the object and its velocity. The formula for kinetic energy is: Kinetic Energy (KE) = (1/2) × mass × velocity²

The kinetic energy increases with an increase in mass or velocity of the object. For example, a moving car or a spinning flywheel possesses kinetic energy.

Potential Energy: Potential energy is the energy stored in an object due to its position or condition.

In this problem, the ice cube is sliding without friction, so there is no work done by external forces or changes in thermal energy.

Initially, the ice cube is at the bottom of the slope, pressed against a spring and compressed by 0.100 m. At this point, the only form of mechanical energy present is the potential energy stored in the compressed spring.

When the ice cube is released, it starts moving up the slope. As it moves upward, the potential energy stored in the compressed spring is converted into gravitational potential energy.

At the highest point of its motion, the ice cube momentarily stops and then starts moving back down. At this point, all of the initial potential energy stored in the spring has been converted back into potential energy due to gravity, but with the opposite sign.

Therefore, the mechanical energies that have changed are the gravitational potential energy and the spring potential energy. External work and changes in thermal energy are not involved in this scenario.

To determine how far the ice cube will travel up the slope before reversing direction, we need to find the distance traveled that corresponds to the change in gravitational potential energy, considering the change in height.

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Complete question:
Learning Goal: To practice Problem-Solving Strategy 10.1 Conservation of energy problems.

An ice cube of mass 50.0 can slide without friction up and down a 25.0 slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 0.100 . The spring constant is 25.0 . When the ice cube is released, how far will it travel up the slope before reversing direction?

Considering only the initial and final situations, identify which mechanical energies have changed. In addition, determine whether you will need to consider any work done by external forces or changes in thermal energy.

Check all that apply.

A) Kinetic energy has changed.

B) Gravitational potential energy has changed.

C) Spring potential energy has changed.

D) Work by external forces on the system must be considered.

E) Thermal energy of the system has changed.

Now, you can identify the initial and final energies and then use this information to solve for d.

(the system is the ice cube, the spring and the earth, the environment is the slope)

The specific latent heat of fusion for the substance in question 1a is 80 kJ/kg, and the specific latent heat of vaporization for the substance in question 1b is 250 kJ/kg.

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Answer: parasitic organisms cause harm to other organisms.

Answer:

parasitic organisms cause harm to other organisms.

Explanation: