difference between acceleration and decceleration short notes​

Answer: Hot air is transferred through heat being radiated from a thermal burner.

The oven absorbs air from the environment and passes it through a thermal resistance (thermal burner) to heat it and then this hot air is the one that cooks the food.

Answer:

he is wronggg

Explanation:

Answer:

Acceleration (a) = 40 m/s²

Explanation:

Given:

Initial velocity (u) = 6 m/s

Final velocity (v) = 4.4 m/s

Time taken (t) = 0.04sec

Find:

Acceleration (a) = ?

Computation:

We know that,

⇒ v = u + at

⇒ a = (v - u) / t

⇒ Acceleration (a) = (4.4 - 6) / 0.04

⇒ Acceleration (a) = (-1.6) / 0.04

Acceleration (a) = 40 m/s²

Larry's average speed, in km/h, can be calculated by dividing the total distance he ran by the time taken.

Average speed is a measure of the overall rate at which an object covers a certain distance. It is calculated by dividing the total distance traveled by the total time taken. The average speed is a scalar quantity, meaning it only has magnitude and no direction. It represents the overall "average" rate at which an object moves without considering the specific details of its motion. Larry ran 4 kilometers in 30 minutes. To calculate the average speed, we convert the time from minutes to hours by dividing it by 60. So, 30 minutes is equal to 0.5 hours.

Average speed = Total distance / Time taken

Average speed = 4 km / 0.5 hours

Dividing 4 km by 0.5 hours, we get:

Average speed = 8 km/h

Therefore, Larry's average speed is 8 km/h.

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The charge flow if the energy transferred is 5.25 kJ and the potential difference is 15 volts is 350 Coulomb

Potential difference is the amount of work needed to move a unit charge from one point to another. It is given by:

V = E/Q

Where V is potential difference, E is energy and Q is charge. Given that:

V = 15 V, E = 5.25 kJ = 5.25 * 10³ J.

V = E/Q

15 = 5.25 * 10³ /Q

Q = 350 Coulomb

The charge flow if the energy transferred is 5.25 kJ and the potential difference is 15 volts is 350 Coulomb

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Answer:

\( \boxed{ \bold{ \huge{ \boxed{ \sf{eon}}}}}\)

Explanation:

The largest formal unit of geologic time is eon .

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The acceleration of an object traveling at terminal velocity is 0 m/s/s since it is not accelerating.

Terminal velocity is the maximum speed achieved by an object as it falls through a fluid such as air or water. The object's weight, drag coefficient, and surface area all affect its terminal velocity. Terminal velocity increases as an object's weight increases and its drag coefficient and surface area decrease. Terminal velocity is greatest when an object reaches its equilibrium between the force of gravity and the fluid's drag force. For example, a human skydiver has a terminal velocity of about 120 mph.

Terminal velocity is the maximum velocity an object can reach and remain at a constant speed as it is subjected to a constant force such as gravity. If the object is subject to any additional force, it will accelerate.

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There are three basic steps in a nuclear fission chain reaction are Initiation, Propagation, Termination.

1. Initiation

The nuclear fission  of \(U_{235} ^{92}\) is started by the absorption of a neutron; a single atom must react in order for the chain reaction to begin.

2. Propagation:-

With each stage producing additional product, this component of the process is repeated repeatedly. When \(U_{236} ^{92}\) splits apart, neutrons are released, which start the nuclear fission of more uranium atoms.

3. Termination:

The chain will come to an end eventually. Termination might take place if the reactant \(U_{235} ^{92}\) is exhausted or if the subsequent neutrons in the chain leave the sample without being absorbed by \(U_{235} ^{92}\).

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The smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

A recognized and accepted standard for measuring other amounts of the same sort is referred to as a unit of measurement. It is predetermined by custom or law.

As given in the problem, we have to find out what is the smallest particle size a scientist can observe using a scanning probe microscope.

1 millimeters = 1 × 10 ⁻³ meter

1 nanometer = 1 × 10⁻⁹  meters

Thus, the smallest particle size a scientist can observe using a scanning probe microscope would be a nanometer, therefore the correct answer is option B.

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The bear's snout will be traveling at 32 m/s when it reaches the honey.

What is honey?

Honey is a sweet and viscous liquid produced by bees, as well as other species of insects. It is composed primarily of sugars, but also contains trace amounts of enzymes, minerals, vitamins, and amino acids. It has been used for centuries as a food source and for its medicinal properties.

Honey has been used to treat coughs, colds, digestive issues, and topically to treat wounds, burns, and skin problems. Honey also has antioxidant, anti-inflammatory, and antiseptic properties. Its antibacterial properties make it a popular choice for wound care, and its antifungal properties can help to fight off fungal infections.

The bear's snout will be traveling at 32 m/s when it reaches the honey.

This is because acceleration is the rate of change of velocity,

which means that if an object accelerates at a rate = 2.0 m/s2

its velocity will increase by 2.0 m/s each second.

Therefore, if the bear accelerates at a rate of 2.0 m/s2 for 16 seconds, it will have a velocity of 32 m/s by the end of that time.

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If the density of the object is less than 1000 kg/m³, then it will float in water. If it is greater than 1000 kg/m³, then it will sink in water.

Density is a measure of the mass of an object per unit of volume. It is a physical property that can be used to compare different materials. Density is typically measured in kilograms per cubic meter (kg/m³). Density can also be expressed in grams per cubic centimeter (g/cm³) or pounds per cubic foot (lb/ft³).

The density of the object can be calculated by dividing the total mass of the object by its volume. Since the object is floating in water, three-fourths of its volume is submerged below the surface. This means that the total volume of the object is equal to four-fourths of its volume above the water plus three-fourths of its volume below the water, which is the same as saying it is equal to one unit of volume.
The density of the object can then be calculated by dividing the total mass of the object by one unit of volume. This will give the density of the object in kg/m³, which can then be compared to the density of water, which is 1000 kg/m³. If the density of the object is less than 1000 kg/m³, then it will float in water. If it is greater than 1000 kg/m³, then it will sink in water.

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Answer:

a = 151/3 m/s²

General Formulas and Concepts:

Forces

Newton's 2nd Law of Motion: F = ma

Explanation:

Step 1: Define

Identify variables

F = 755 N

m = 15 kg

Step 2: Solve for a

Topic: AP Physics 1 - Algebra Based

Unit: Forces

Answer:

I assume its c. Since its talking about testing.

Explanation:

Answer:

The answer is test of durability

Explanation:

The true statement about an orbit is that the sun and a planet are at the two foci of an orbit. Hence, option B is correct.

An orbit is a curved path taken by an object in celestial mechanics, such as the path taken by a planet around a star, a natural satellite around a planet, or an artificial satellite around an object or location in space, such as a planet, moon, asteroid, or Lagrange point.

Ordinarily, the term "orbit" refers to a trajectory that repeats itself periodically, though it can also apply to a non-repeating trajectory. Kepler's principles of planetary motion roughly predict that planets and satellites have elliptic orbits, with the center of mass orbiting at a focal point of the ellipse.

Hence, this concludes that option B is correct.

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The property of a transverse wave that stays the same even as the wave's energy and other properties change is the wavelength.

The correct option to the given question is option a.

The wavelength is the distance between two successive points of the wave that are in phase. As the wave's energy and amplitude change, the distance between two successive points of the wave that are in phase remains the same.

This is because wavelength is determined by the frequency of the wave and the speed of propagation. The frequency of the wave is the number of cycles of the wave that occur in one second, while the speed of propagation is the rate at which the wave travels through a medium.

If the frequency of the wave and the speed of propagation remain the same, then the wavelength will also remain the same even as the wave's energy and other properties change. This property is known as the characteristic of the wave.The amplitude is the maximum displacement of a point on the wave from its rest position. The frequency is the number of cycles of the wave that occur in one second. The rest position is the position of the medium when it is not disturbed.

Hence, wavelength of a transverse wave remains same even as the wave's energy and other properties change.

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When in total lunar eclipse, the moon shows a reddish color because only the red light from the Sun is deflected onto it by the Earth's atmosphere.

Hence, the correct option is B.

During a total lunar eclipse, the Earth comes between the Sun and the Moon, casting a shadow on the Moon. However, even when in the shadow, the Moon does not become completely dark. Instead, it takes on a reddish hue. This occurs due to a phenomenon called atmospheric scattering.

When sunlight passes through the Earth's atmosphere, it undergoes scattering, with shorter wavelengths (blue and green light) being scattered more than longer wavelengths (red and orange light). As the Earth's atmosphere refracts or bends the sunlight, it directs the longer red wavelengths toward the Moon.

This red light is then deflected onto the Moon's surface during a lunar eclipse, giving it a reddish appearance. Essentially, the Earth's atmosphere acts as a lens that filters out most of the other colors of light, allowing predominantly red light to reach the Moon and be observed during the eclipse.

Therefore, the correct explanation for the Moon's reddish color during a total lunar eclipse is that only the red light from the Sun is deflected onto it by the Earth's atmosphere.

Hence, the correct option is B.

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Answer:

because potential energy is the kinetic energy something COULD have. Like when a rollercoaster is about to go over a bump, before it goes down it has potential energy, then when it goes it accelerates and creates kinetic energy. That rock be zero cause it has no potential

Explanation:

The force of collision with the ground will change by a factor of 4

The formula for momentum shows an inverse relationship between force and time, in other words, force varies inversely as time. Hence, if the time of collision between the brick and the ground is increased by a factor of four, the force of collision is with the ground changes by a factor of four. In this case, the resulting force reduces by a factor of four. Momentum is defined as the product of the mass of an object with the changes in the velocity of the same object per time.

F=m(v-u)/t

Where F= momentum

v= final velocity

u= initial velocity

t = time taken

The earth diameter is about 3 and 2 thirds times the diameter of the moon. what is the angular diameter of the earth seen by an observer on the moon?

We calculate the angular diameter of the Earth using the equation:

a=arctanD/d

where a is the angular diameter, D is the physical diameter of the Earth, and d is the distance from the Moon to the Earth.

The equatorial radius of the Earth is rE=6378.1km, the diameter is therefore

D=2×rE=12756.2.

   The mean distance to the Moon is d=384399km. This gives a (mean) angular diameter of a=1.90065°.

At Perigee the distance is d=362,600km. This gives an angular diameter of a=2.01482°

At Apogee the distance is d=405,400km. This gives an angular diameter of a=1.80226°

These Moon-Earth distances are as seen from the centre of the Moon. To calculate the diameter from the surface of the Moon, to subtract the position of the observer along the Moon-Earth axis.

If the observer is on the Moon's equator and the Earth is at zero-hour angle, the distance to the Earth needs to be subtracted by rM=1738.14km. Thus, we have;

 The mean distance to the Moon is d=384399−1738=382661km, giving an angular diameter of a=1.90928°.

At Perigee the distance is d=362600−1738=360862km. We have an angular diameter of a=2.02452°

At Apogee the distance is d=405400−1738=403662km. We have an angular diameter of a=1.81001°

The angular diameter of the Earth from the surface of the Moon is, therefore, between a=1.80226° (at apogee and the Earth is near the horizon) and a=2.02452° (at perigee and for an observer at the equator and when the Earth is at maximum altitude on the meridian).

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Answer: im thinking its the first choice >_< im so sorry ifits wrong (35,45300)

Explanation: im really sorry if this is wrong im really really really sorry im really sorry

A 7.4 nc point charge and a - 2.1 nc point charge are 3.3 cm apart and the electric field strength at the midpoint between the two charges     3.14 × 10⁵ N/C.

To find the electric field strength, the given values are,

q1 = 7.4 nC = 7.4 × 10⁻⁹ C

q2 = - 2.1 nC = 2.1 × 10⁻⁹ C

Distance (d) = 3.3 cm apart

Substituting the given values,

At first, midpoint (r) = 3.3 / 2 = 1.65 cm = 1.65/100 =0.0165 m

The electric field strength at midpoint is given by:

E = k/r² ( q1 + q2)

K = 9.0 × 10⁹

Thus,

E = ((9 × 10⁹) / 0.0165²) × (7.4 × 10⁹ + 2.1 × 10⁹)

E = (3.3057851× 10¹³)  (9.5 × 10⁹)

E = 31.4049586 × 10¹³⁻⁹

E = 31.4049586  × 10⁴

E = 3.14 × 10⁵ N/C.

The Electric field strength can be found as 3.14 × 10⁵ N/C.

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Answer:

  1.343 atm

Explanation:

The mass of water above 1 square meter of swimming pool bottom is ...

  M = (3.5 m)·(1000 kg/m^3) = 3500 kg/m^2

Then the force exerted by the water on the pool bottom is ...

  F = Mg = (3500 kg/m^2)(9.8 m/s^2) = 34300 N/m^2 = 34300 Pa

Compared with atmospheric pressure, this is ...

  34,300/10^5 = 0.343 . . . . atmospheres

Added to the atmospheric pressure on the water's surface, the total pressure on the pool bottom is 1.343 atmospheres.

Answer: The stratosphere and the troposphere are defined by the variation in temperature with height. Within a troposphere, the temperature drops as altitude increases, and drops fast enough for convection to occur. Whereas within a stratosphere, the temperature rises with increasing altitude. Features of the atmosphere change with altitude: density decreases, air pressure decreases, temperature changes vary. Different temperature gradients create different layers within the atmosphere. The lowest layer is the troposphere where most of the atmospheric gases and all of the planet's weather are located.

Explanation:

Answer:

Normal body temperature does not change much with aging. But as you get older, it becomes harder for your body to control its temperature. A decrease in the amount of fat below the skin makes it harder to stay warm.

Answer:

Temperature of the mixture=8 °C

Explanation:

Let, Temperature of the mixture=t °C

Q₁ = Q₂

=> m₁SΔΘ₁ = m₂SΔΘ₂

=> 39 × (20+t) = 21 × (60-t)

∴ t = 8 °C

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You can disregard the weight of the rope and assume that the rope does not stretch. Use 9.81m/s2 as the gravitational acceleration value.

The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. It is a vector quantity to accelerate (in that they have magnitude and direction). The direction of the net force acting on an object determines the direction of its acceleration. According to Newton's Second Law, an object's acceleration is the result of two factors working together: the object's mass, which varies depending on the materials it is made of, and the net balance of all external forces acting on it. The magnitude of an object's acceleration is inversely proportional to the object's mass.

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