A toaster is rated at 770 W when connected to a 220 V source. What current does the toaster carry? A. 2.0 A B. 2.5 A C. 3.0 A D. 3.5 A W ITH 20 Ampara and

The experiment's control consisted of the four treatments. The wild kind of mouse

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Answer:

Below

Explanation:

df = do + vo t + 1/2 a t^2     df = final position = ground = 0

                                             do - original position = 75 m

                                              vo = 16 m/s

                                                a = -9.81 m/s^2

0 = 75 + 16 t - 1/2 ( 9.81 )t^2

    - 4.905 t^2  + 16 t  + 75 = 0     Use Quadratic Formula to find :

                                                           t = 5.9 s

Answer:

Break it into cubes. When you make the thing that is dissolving smaller, the surface area of the thing dissolving it is larger, making the jelly more exposed.

Explanation:

The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules: A molecule in the bulk liquid experiences cohesive forces with other molecules in all directions. A molecule at the surface of a liquid experiences only net inward cohesive forces.

The force on the object that goes from 35 m/s to 85 m/s in 20 seconds and has a mass of 148 kg is 370 N.

Force on an object is defined as the rate of change of momentum of the object. Momentum is the product of the mass of the object and its velocity. In other words,

\(F = \Delta p / \Delta t\)

Where F is the force applied, Δp is the change in momentum, and Δt is the change in time. The initial velocity of the object is 35 m/s, the final velocity of the object is 85 m/s, and the change in time is 20 seconds. Therefore, the acceleration of the object can be calculated as follows:

\(a = (v_f - v_i) / t\)

= (85 - 35) / 20

\(= 2 m/s^2\)

The momentum of the object can be calculated as follows:

p = m * v

= 148 * 85

= 12,580 Ns

The initial momentum of the object can be calculated as follows:

\(p_i = m * v_i\)

= 148 * 35

= 5,180 Ns

The change in momentum can be calculated as follows:

Δp = p_f - p_i

= 12,580 - 5,180

= 7,400 Ns

Finally, the force on the object can be calculated as follows:

\(F = \Delta p / \Delta t\)

= 7,400 / 20

= 370 N

Therefore, the force on the object that goes from 35 m/s to 85 m/s in 20 seconds and has a mass of 148 kg is 370 N.

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Answer:

KE = 10530 J or 10.53 KJ

Explanation:

The formula for kinetic energy is KE = 1/2 mv^2

Let's apply the formula:

KE = 1/2 mv^2

KE = 1/2 (65kg) (18m/s)^2

KE = 10530 J or 10.53 KJ

Electromagnetic radiation with a wavelength of 589 nm appears as yellow light to the human eye. The energy of one photon of this light is 3.37x10-19J. Thus, a laser that emits 1.3x10-2 of energy in one pulse of light at its wavelength produces (BLANK) photons in each pulse is 3.9 x 10¹⁶

Electromagnetic waves( which include visible light,radio, microwaves etc) carry energy. Each photons( a quantum unit of EM radiation) possess some energy depending on the frequency of the radiation.

The energy of each photon of yellow light is given as-

E=hc/λ

n= energy of laser/energy of one photon

n= E/ El

where E= energy of one photon of the light

El=energy of a laser

λ= wavelength of light

n= no.of photons in each pulse

n=1.3*10-²/3.37*10-¹⁹

n= 3.9*10¹⁶

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That's called "lightning".

Answer:

The lightning itself is the transfer of charge from one region of a cloud to another or between the cloud and Earth. The narrow channel within which the flash of lightning occurs is heated suddenly to ~ 30,000 K, with essentially no time to expand.

Explanation:

Hope it helps

The correct answer is option B. It travels up and down. Transverse waves are characterized by the fact that they cause particles in the medium to move perpendicular to the direction of wave propagation.

Transverse waves are a type of wave that causes the particles of the medium to move up and down or side to side as the wave passes through them.

The other options are not right because:

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An electric pencil sharpener is a small motorized appliance for sharpening or refreshing the points on lead pencils.

An electric pencil sharpener is a small motorized equipment for polishing or fresh the factors on lead pencils. Within the hollow, a small electric powered motor turns a blade meeting at high velocity. The blades shave wooden and lead from the pencil's cease, bringing it to some extent.

The old-fashioned pencil sharpeners which are established to the wall and cranked through a manage are an instance of a compound system that is composed  simple machines: the wheel and axle and a wedge.

You could sharpen colored pencils in an electric sharpener, however make certain to be very mild with your pencils and often easy your sharpener to put off any wax increase. If performed improperly, sharpening your colored pencils in an electric sharpener can harm each your pencils and your sharpener.

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The time taken for the man to reach the ground is 0.64 s and his velocity on reaching the round is 6.26 m/s.

Given that we can be able to use the equations of kinematics to obtain the time that it took the man to fall to the floor. Using the equation;

v^2 = u^2 + 2gh

v = final velocity

u = initial velocity

g = acceleration due to gravity

h = height attained

Note that u= 0 m/s since he dropped from a height;

v= √2gh

v = √2 * 9.8 * 2

v = 6.26 m/s

Again;

v = u + gt

Again  u= 0 m/s

v = gt

t = v/g

t = 6.26 m/s/9.8 m/s

t = 0.64 m/s

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Answer:

  48 ft/s

Explanation:

Acceleration due to gravity decreased the upward velocity to zero in 1.5 seconds (half the total time), so the initial velocity must have been ...

  (32 ft/s^2)(1.5 s) = 48 ft/s

The magnitude of the frictional force between the sled and the snow is 46.3 N.

We are given that the pulling force has a horizontal component of 21 N and a vertical component in the upwards direction of 25 N. Using this information, we can calculate the magnitude of the pulling force as follows:

Magnitude of the pulling force = √((21 N)² + (25 N)²)

= √(441 N² + 625 N²)

= √(1066 N²)

= 32.7 N

To calculate the force of friction, we first need to calculate the net force. We can do this by finding the difference between the pulling force and the weight of the sled and child:

Net force = Magnitude of the pulling force - Weight of the sled and child

= 32.7 N - 79 N

= -46.3 N

Now, we know that this net force is equal to the force of friction:

Force of friction = Net force

= -46.3 N

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Our sun is 27 million times larger than our moon. Based on its mass, the sun's gravitational attraction to the Earth is more than 177 times greater than that of the moon to the Earth. If tidal forces were based solely on comparative masses, the sun should have a tide-generating force that is 27 million times greater than that of the moon. However, the sun is 390 times further from the Earth than is the moon. Thus, its tide-generating force is reduced by 3903, or about 59 million times less than the moon. Because of these conditions, the sun’s tide-generating force is about half that of the moon.

The work needed to extend its far is 80.

When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement.

This is known as work in physics. By multiplying the length of the path by the component of the force acting along the path, work can be calculated if the force is constant.

The work W is equal to the force f times the distance d, or W = fd, to mathematically describe this idea. The work is W = fd cos if the force is applied at an angle of to the displacement.

Therefore, The work needed to extend its far is 80.

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Answer:

53 milliliters

Explanation:

Answer:

ok

Explanation:

Acceleration is defined as the rate of change of velocity.

Acceleration = (Change in velocity) / time taken

Acceleration = (Final velocity - initial velocity) / time

As the object velocity changes by the same amount in each second, it means the acceleration is constant.

The height, length, and period of a wave depend upon three main factors: the length of time the wind has blown, the fetch, and the wind speed.

1. Length of time the wind has blown: This factor refers to the duration for which the wind has been blowing over the water surface. The longer the wind blows, the more energy it transfers to the water, leading to larger waves. As a result, the height, length, and period of a wave are influenced by the length of time the wind has blown.

2. Fetch: Fetch is the distance over which the wind blows in a constant direction across the water surface. The larger the fetch, the more space there is for the wind to transfer energy to the water, and the larger the resulting waves will be. Therefore, the height, length, and period of a wave are affected by the fetch.

3. Wind speed: The speed of the wind is another critical factor in determining the characteristics of a wave. Faster winds have more energy to transfer to the water, creating larger waves with higher heights, longer lengths, and longer periods. As such, the height, length, and period of a wave depend on the wind speed.

In summary, the height, length, and period of a wave are influenced by the length of time the wind has blown, the fetch, and the wind speed. These factors work together to determine the overall size and shape of the waves that form on the water surface.

Understanding these factors can help predict the behavior of waves and their potential impact on coastal areas and marine activities.

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9,800 Newtons of pressure must be supported by the wire (N). T = m x a, where T is tension, m is the car's mass, and an is the velocity, can be utilized to compute that.

T=1400 kg x 0.70 m/s2.

T = 9,800 N

First, figure out how much force is needed to start the car moving.

Force = mass × accelerate

Force = 1400 kg × 0.70 m/s2

Force = 980 N

Step 2: Calculate the tension in the cable.

Tension = Force

Tension = 980 N

Consequently, to propel the vehicle vertically upwards towards a speed of 0.70 m/s2, the wire should endure a tension of 980 N.

A force which draws on something and extends it is known as tension in thermodynamics. This force can be applied across a thread, wire, cord, or even other media. Pulling apart of the medium's extremities causes it to decompress, which is the reverse of compression. To determine the tension in a media, divide the pressure acting on its endpoints by both the surface of its pass.

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The magnitude of the resulting acceleration of the block is (8), 14.5455 m/s²

Use Newton's second law to solve this problem:

ΣF = ma

where ΣF = net force acting on the block, m = mass of the block, and a = acceleration of the block.

Resolve the force of 87 N into its horizontal and vertical components.

F_horizontal = F cosθ = 87 cos 30° = 75.366 N

F_vertical = F sinθ = 87 sin 30° = 43.5 N

The net force in the horizontal direction is:

ΣF_horizontal = 29 N

Using ΣF = ma, find the acceleration:

a = ΣF / m = 29 N / 2 kg = 14.5 m/s²

Therefore, the magnitude of the resulting acceleration of the block is:

a = 14.5 m/s²

The answer is (8) 14.5455, which rounds to 14.5 m/s².

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As the solid is turned into gas, energy would be added to the solid.

We know that the heating curve has to do with the diagram that shows the way and manner in which the temperature of a body changes as it is converted from solid to gas.  We know that heat is that kind of energy which is able to cause the temperature change of a body.

There are stronger intermolecular interactions that holds the substance together in the solid state than there is in the liquid state. The implication of this is that more energy must be supplied so as to break these strong interactions and take the substances from solid to gas.

In the gaseous state, there is minimum intermolecular interactions and the particles of the substance are moving freely.

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Convert second term into kg

131 = 0.131

Term has become:

2.52 + 0.131

The total is:

2.651 kg

The magnitude scale in astronomy is logarithmic, which means that for every 1 unit increase in magnitude, the brightness decreases by a factor of approximately 2.512 (approximately 2.5).

Given that the +6.0 magnitude star appears 2.5 times brighter than the +3.0 magnitude star, we can calculate the difference in magnitudes between them:
Magnitude difference = 6.0 - 3.0 = 3.0
Since each magnitude unit represents a factor of 2.512 change in brightness, the ratio of the brightness between the two stars can be determined as:

Brightness ratio = 2.512^(magnitude difference) = 2.512^3.0 ≈ 15.85
Therefore, the +6.0 magnitude star is approximately 15.85 times brighter than the +3.0 magnitude star.

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Answer:

2 cm.

Explanation:

Please see attached photo for diagram.

In the attached photo, y is the distance from the pivot to which the 25 g is placed.

The value of y can be obtained as follow:

Clockwise moment = 5 × 10

Anticlock wise moment = y × 25

Anticlock wise moment = Clockwise moment

y × 25 = 5 × 10

y × 25 = 50

Divide both side by 25

y = 50/25

y = 2 cm

Thus, the distance is 2 cm

Despite the units frequently seen on laboratory scales, the most appropriate unit below for quantifying weight is the Newton.

A Newton is the international unit of weight which is equal to the force required to accelerate a mass of one kilogram at a rate of one meter per second squared, in the absence of other force fields. Units of measurement can be categorized into two, which are fundamental units and derived units. A fundamental unit is a unit that cannot be broken down further, while a derived unit is a unit that can be obtained by multiplying two or more fundamental units.

Mass is a fundamental unit of measurement, but weight is a derived unit of measurement. It is derived from the force exerted by an object as a result of gravity. The force exerted by an object as a result of gravity is given by the mass of the object multiplied by the acceleration due to gravity, which is 9.8 m/s² on the earth's surface. So therefore, the most appropriate unit for quantifying weight is the Newton.

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The ongoing historical movement of space exploration involves the development of orbital pathways and propulsion techniques to enable humanity to venture beyond Earth's boundaries and explore the vast expanse of space.

Over the course of history, the quest to explore space has evolved significantly, driven by advancements in orbital pathways and propulsion technologies. The development of orbital pathways, such as geostationary orbits and transfer orbits, allows spacecraft to efficiently navigate between celestial bodies and maintain stable positions for communication or observation purposes.

These pathways have revolutionized satellite communication, weather monitoring, and scientific research.Propulsion techniques have also undergone continuous refinement.

From traditional chemical propulsion systems, such as liquid and solid rockets, to more advanced technologies like ion propulsion and nuclear propulsion, engineers are constantly seeking ways to enhance spacecraft speed, efficiency, and endurance.

Future propulsion concepts, such as solar sails and antimatter propulsion, are being explored to enable faster and more efficient interplanetary travel.

This ongoing historical movement is driven by humanity's innate curiosity and desire to explore the unknown. By developing and improving orbital pathways and propulsion techniques, scientists and engineers strive to overcome the challenges of space travel, paving the way for future missions to distant planets, moons, and potentially even interstellar destinations.

The exploration of space holds the promise of unraveling cosmic mysteries, expanding scientific knowledge, and ultimately ensuring the long-term survival and progress of our species beyond the confines of Earth.

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Answer:

The water from the surface of the Earth must be evaporated by the sun.

Explanation:

The item has no energy at its greatest point since all of it's kinetic energy has been transformed into potential energy; as a result, the velocity is null and the object is not accelerating.

The best engine in the cosmos is the speed of light. A study that was earlier this month published in the scientific journal Nature revealed that it was an illusion.

The formula for gravitational force is P.E. Equals mgh, where g is the deceleration caused by gravity (9.8 m/s2 at the earth's surface) when h is the elevation in meters. The units for gravitational potential energy are kg m2/s2, which are the same as those for kinetic energy.

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The energy required to heat 40.7 g of water (H2O) from -10°C to 70°C can be calculated as follows;Mass of water = 40.7 gTemperature change = 70 - (-10) = 80 °C Specific heat of ice = 2.06 J/g °CSpecific heat of water = 4.18 J/g °CHeat of fusion of water = 334 J/gAt first, we have to heat the ice from -10°C to 0°C using the formula;

q = mcΔTwhere m is the mass, c is the specific heat, and ΔT is the temperature change. For ice, c = 2.06 J/g °C, and the temperature change is 0 - (-10) = 10°C;

q1 = (40.7 g)(2.06 J/g °C)(10°C) = 839.42 J

This amount of heat energy is needed to bring the ice to its melting point. The amount of heat required to melt the ice at 0°C can be determined using the formula; q2 = mLfwhere Lf is the heat of fusion of ice, which is 334 J/g;

q2 = (40.7 g)(334 J/g) = 13590.8 J

Now, we have 40.7 g of water at 0°C.

To heat this water to 70°C, we use the formula;

q3 = mcΔT

where m is the mass, c is the specific heat, and ΔT is the temperature change. For water, c = 4.18 J/g °C, and the temperature change is 70 - 0 = 70°C;

q3 = (40.7 g)(4.18 J/g °C)(70°C) = 12123.94 J

The total energy required is;

\(q_total = q1 + q2 + q3 = 839.42 J + 13590.8 J + 12123.94 J = 26554.16 J\)

Thus, the energy required to heat 40.7 g of water (H2O) from −10∘C to \(70∘C is 2.66 x 10^4 J or 26.6 kJ\).

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