The astronaut’s weight on Earth is the ................................................................... force between the astronaut and ..................................................​

Answer:

in electric lamp

Electric Energy to Heat and Light Energy

Explanation:

Answer:

Ex: an electric fan transforms electric energy to kinetic energy

Or

Chemical energy to heat and light energy

Explanation:

Hope this helps

Answer:

The value of the changed current is approximately 3.585A.

Explanation:

This particular problem can be approached by the formula for the magnetic force in a current-carrying coil.

F = IBL      {mark as equation 1}

where:

F is the magnetic force,

I is the current,

B is the magnetic field,

L is the length of the wire.

The given conditions are:

Initial current, I = 5.9 A

Initial magnetic force, F= 0.031 N

Upon manipulating equation 1, we get:

B=F/(I*L)

Now this implies:

B=0.031N/(5.9A*L)------------equation-2

Now after the conditions are changed,

B'=B

L'=L

I'=?

F'=0.019N

Therefore,

B'=B=0.019N/(I'*L')------------equation-3

Now, solving equations 2 and 3, we get

I'= 0.019 N / (B * L) =

0.019 N / (0.031 N / (5.9 A * L) * L)

= 0.019 N / (0.031 N / 5.9 A)

= 0.019 N * (5.9 A) / 0.031 N

≈ 3.585 A

Therefore the value of the changed current is approximately 3.585A.

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Answer:

gsg

Explanation:

The balloons with negative charges moves apart from each other by electrostatic force of repulsion. The potential energy in them increases as they move away.

The basic principle of charges is that, two like charges repel and unlike charge attracts. That is: two negative charged bodies or two positively charged bodies will repel each other and one negative charged body attracts a positively charged body.

In both cases attraction or repulsion the charged particles exerts a force with each other called the electrostatic force. The electrostatic force between two charges is directly proportional to the magnitude of charges and inversely proportional to the distance between them.

The balloons with negative charges moves apart from each other by electrostatic force of repulsion. The potential energy in them increases as they move away.

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Answer:

you sopose to use rats to testing to get your reaserch

Explanation:

The incline angle should be about 4.7 degrees and the block's acceleration would be greater than that of the rolling sphere.

a) Let M be the mass of the sphere, R be its radius, and θ be the incline angle. When the sphere rolls down the incline without slipping, the friction force acting on it causes a torque about its center of mass, which results in a rotational acceleration. If a is the linear acceleration of the center of mass, and α is the angular acceleration, then we have:

a = α R

Also, the torque τ caused by the friction force is given by:

\(τ = I α\)

where I is the moment of inertia of the sphere about its center of mass. For a solid sphere, I is given by:

\(I = (2/5) M R^2\)

Since the sphere rolls without slipping, the friction force is related to the normal force N by:

\(f = μ N\)

where f is the friction force, and μ is the coefficient of static friction. The normal force is related to the weight of the sphere by:

N = M g cos θ

where g is the acceleration due to gravity.

The net force acting on the sphere down the incline is given by:

\(Fnet = M g sin θ - f\)

The linear acceleration of the center of mass is given by:

\(a = Fnet / M\)

Substituting for f and N, we get:

\(a = g (sin θ - μ cos θ)\)

Equating this to α R, we get:

g (sin θ - μ cos θ) = α R

Substituting for α using the expression for I and τ, we get:

\(g (sin θ - μ cos θ) = τ / (2/5 M R)\)

Substituting for τ using the expression for f and N, we get:

\(g (sin θ - μ cos θ) = (μ M g cos θ) R / (2/5)\)

Simplifying, we get:

\(tan θ = (5/7) μ\)

Substituting the given values, we get:

tan θ = (5/7) (0.23)

\(θ = arctan(0.082)\)

θ = 4.7 degrees (approximately)

Therefore, the incline angle should be about 4.7 degrees

b) Since the block is frictionless, its acceleration down the incline is given by:

a' = g sin θ

Substituting the value of θ obtained in part a), we get:

a' = g sin(4.7) ≈ 0.41 g

Since this is greater than 0.23g, the block's acceleration would be greater than that of the rolling sphere.

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For a human jumper to reach a height of 110 cm, the person will need to leave the ground at a speed of 4.65 m/s.  

We can calculate the initial speed to reach 110 cm of height with the following equation:

\( v_{f}^{2} = v_{i}^{2} - 2gh \)

Where:

\( v_{f}\): is the final speed = 0 (at the maximum height of 110 cm)

\( v_{i}\): is the initial speed =?

g: is the acceleration due to gravity = 9.81 m/s²

h: is the height = 110 cm = 1.10 m

Hence, the initial velocity is:

\( v_{i} = \sqrt{v_{f}^{2} + 2gh} = \sqrt{2*9.81 m/s^{2}*1.10 m} = 4.65 m/s \)

Therefore, the initial speed that the person must have to reach 110 cm is 4.65 m/s.

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Answer:

Kinetic Energy to Dissipated energy

Explanation:

Kinetic Energy is Energy that is in motion and being used, Dissipated energy is energy that has been used up by whatever movement or motion was present.

Answer:

1. 7.5 km/h

2. 1 hour, 52 minutes, 30 seconds

3. 0.8 Joules

4. 13.33 mph

5. 19456 Joules

6. 10.5 kg

Explanation:

Part (a) Sort the buoyant force magnitudes acting on blocks A, B, C, and D from largest to smallest. Sort the block masses in part (b) starting with the largest.

Magnitude in physics is simply described as "distance or quantity." It shows the size or direction that an object moves in either an absolute or relative sense. It is a way of expressing something's size or scope.

Size is referred to as magnitude. A automobile is traveling more quickly than a bike, for instance, when it comes to speed. In just this case, the car is happening faster than the motorcycle by a wider margin.

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The average Earth-Moon distance is approximately 3.84x10^5 km. To convert this value to millimeters, we need to multiply it by the conversion factor that represents the number of millimeters in a kilometer. Since there are 1,000,000 millimeters in one kilometer, we can perform the following calculation:

3.84x10^5 km * 1,000,000 mm/km = 3.84x10^5 * 10^6 mm = 3.84x10^11 mm.

Therefore, the average Earth-Moon distance is approximately 3.84x\(10^11\) mm when using the 5.7899x\(10^6\)mm format.

To explain further, the conversion from kilometers to millimeters involves multiplying the given distance by a conversion factor. In this case, we use the conversion factor of 1,000,000 mm/km because there are 1,000,000 millimeters in one kilometer. When we multiply the given distance of 3.84x\(10^5\) km by the conversion factor, the kilometers cancel out, leaving us with the distance in millimeters.

The scientific notation is used to represent large numbers or small numbers conveniently. In this case, the answer is presented in scientific notation as 3.84x\(10^11\) mm, which means 3.84 multiplied by 10 raised to the power of 11. This notation allows us to express the large value in a concise and standardized format.

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Answer:

His third law states that for every action or force in nature there is an equal and opposite reaction.

Explanation:

The heavier the books get, the harder it is for Molly to exert enough force to move the cart.

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Answer:

left

Explanation:

When a force is applied in the opposite direction of motion, it opposes the motion of the object, causing its speed to decrease.

A force is an influence in physics that can change the motion of an object. A force can cause a mass object to change its velocity, or accelerate.

Intuitively, force can be described as a push or a pull. A force is basically a vector quantity as it has both magnitude and direction.

The term "force" has a specific meaning in science. At this level, it is perfectly acceptable to refer to a force as a push or a pull.

Another object applies a force to another. The concept of a force is not restricted to living or non-living things.

To slow a moving object, apply force in the opposite direction to the direction of motion.

Thus, the force should be applied from left to slow down the object.

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Contacting the tractor-trailer truck's driver who was operating it when the accident occurred.

When responding to any incident, first responders must be on the lookout for dangerous chemicals. The dispatcher may give details like odd indications and symptoms (such a strong stench or itchy eyes) or the address may hint that the call may entail a chemical release. When unpleasant odors, gasoline, or corrosive liquid spills are present, it may be easy to see that hazardous items are present. When dealing with odorless yet toxic and/or combustible vapors and liquids, radioactive materials, or other circumstances, the dangerous character of the chemical(s) may not always be obvious. It is safe to presume that the cargo is dangerous if a vehicle has a diamond-shaped placard or an orange-numbered panel on the side or back.

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In a transformer, energy is carried from the primary coil to the secondary coil by The magnetic field in the iron core.

What is transformer?

A Transformer is an electrical device used to increase or decrease the voltage provided to an electrical circuit. It is made up of two or more coils of wire wound around a common core. The coils are typically referred to as the primary and secondary winding. Electricity flowing in the primary winding creates a magnetic field, which in turn induces a voltage in the secondary winding. The ratio of primary to secondary winding determines the output voltage. Transformers are used extensively in the electricity distribution network, enabling the safe and efficient transmission of electricity over long distances.

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Answer:

C

Explanation:

Answer:

C

Explanation:

Answer:

its two valence electrons

Explanation:

Calcium is a group 2 element with two valence electrons. Therefore, it is very reactive and gives up electrons in chemical reactions.

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a = 23.6 The speed  b = 1.64 magnitude of the average velocity

16R/s is the frequency, and 0.47 m0.47m is the diameter. Hence:

16R/s=f= 1/T

and

d = 0.47m = 2r , r=d/2= 0.235

So we can solve for the period (T)

16Rs-¹= f = 1/T

1/16 = T

Then, we have to remember that, in a uniform circular motion, the centripetal acceleration is given by

a = v²/r = 4π²r/T²

Now we have to substitute.

a = 4π²(0.235)/(1/16)²

a=2375.02ms-²

Then, we can use the equation

a = v²/r to solve v

2375.02 = v²/r

2375.02 = v²/0.235

(0.235) (2375.02) = v²

√(0.235)(2375.02) = v

23.6 = v  

(B) 3.25 revolutions means that the displacement will be 0.25 or 1/4 of the circumference.

Hence, the displacement becomes the hypotenuse in a right triangle is where we can use the Pythagorean theorem.

a=b=r

a=b=0.235

a²+b²=c²

(0.235)² + (0.235)² = c²​

C = 0.47/√2

The total time for 3.25 revolutions has to be equal to

3.25T = (3.25) (1/16)

So, since the average velocity is

Displacement/Time we can input the values we have and solve for the result.

Displacement/time = Va

0.47√2 / (3.25) (1/16)

1.64ms-¹ = Va

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Answer:

erosion

Explanation:

Since there is no friction on the rails, the rod will experience a force due to the voltage source and the resistor.

This force will cause the rod to move to the right, towards the resistor. As the rod moves, it will experience a change in voltage due to the resistor, which will result in a decrease in the force driving the motion. Eventually, the force and the resistance will balance each other out, resulting in a constant velocity motion.
However, since the rails extend to infinity on the left, there will be no external force to stop the rod from moving. Therefore, the rod will continue to move indefinitely in the right direction with a constant velocity. It is important to note that this motion is only possible because there is no friction between the rod and the rails. If there was friction, the motion of the rod would eventually come to a stop due to the dissipation of energy.

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By being wary of these factors and following the recommended guidelines, you can ensure the safe and effective use of hemoconcentrators in medical procedures.

When using hemoconcentrators, it's essential to be cautious and consider a few factors to ensure their safe and effective use. Some things to be wary of with hemoconcentrators include:
1. Compatibility: Make sure the hemoconcentrator is compatible with your specific application and equipment to avoid any malfunctions or complications during the procedure.
2. Clotting risks: Hemoconcentrators can sometimes lead to increased blood clotting risks. Ensure appropriate anticoagulation measures are in place during the procedure to minimize this risk.
3. Flow rate: Be mindful of the blood flow rate through the hemoconcentrator. Exceeding the recommended flow rate could lead to hemolysis or other complications.
4. Sterility: Maintain a sterile environment and follow proper handling procedures to prevent contamination, which could potentially lead to infection.
5. Monitoring: Closely monitor the patient's vital signs, blood pressure, and fluid balance during the procedure to promptly identify and address any adverse reactions or complications.

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The fireman's hose is pointed vertically upwards at a height of 1.5 m above the ground and a stream of water is coming from it. When the water is shut off, the noise of the water hitting the ground continues for another 2.0 s, the speed of the water as it left the hose is  4.31 m/s.

A firefighter, also known as a fireman or firewoman, is a professional who is trained and equipped to put out fires, rescue people and animals from dangerous situations, and manage other emergency situations.

The water comes to rest after it reaches the ground, so it moves at constant acceleration in the vertical direction. Since the final velocity is zero, the initial velocity and the displacement can be used to calculate the time of flight.

The speed at which the water left the hose can then be determined using the time of flight and the height of the hose above the ground.

Initial velocity = v₀, Final velocity = vf = 0.

Displacement = h = 1.5 m

Acceleration = a = g = 9.8 m/s²

Time of flight = t

Using the formula ,vf = v₀ + at₀ = v₀ + gt

v₀ = -gt

displacement = v₀×t + 1/2×at²

h = -1/2 × gt²

t = sqrt(2h/g) = sqrt(2(1.5)/9.8) = 0.44 s.

Using the formula, vf = v₀ + at

vf = 0 + gtvf = 9.8 × 0.44 = 4.31 m/s.

The water's speed as it leaves the hose is 4.31 m/s.

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Answer: The executive board of the International Olympic Committee voted yesterday to allow professional tennis, ice hockey and soccer players under the age of 23 to compete in the 1988 Winter and Summer Games.

The solubility of lead nitrate is 52 grams per 100 milliliters of water at 0°C. Since the question does not specify the temperature, we will assume it is 0°C.To calculate the number of millimeters of water required to dissolve 5 g of lead nitrate,

we must first calculate the number of milliliters of water required to dissolve 5 g of lead nitrate.52 grams of lead nitrate can dissolve in 100 milliliters of water. So,5 g of lead nitrate can dissolve in x milliliters of water.= (5 g / 52 g) × 100 mL= 9.6 mLTherefore, 5 g of lead nitrate can dissolve in 9.6 mL of water. However, the question is asking for the number of millimeters of water, not milliliters. Since 1 milliliter of water weighs 1 gram,9.6 milliliters of water will weigh 9.6 grams.Thus, 5 g of lead nitrate can dissolve in 9.6 millimeters of water.

main answer:5 g of lead nitrate can dissolve in 9.6 millimeters of water. :52 grams of lead nitrate can dissolve in 100 milliliters of water. So, 5 g of lead nitrate can dissolve in x milliliters of water.= (5 g / 52 g) × 100 mL= 9.6 mLTherefore, 5 g of lead nitrate can dissolve in 9.6 mL of water. However, the question is asking for the number of millimeters of water, not milliliters. Since 1 milliliter of water weighs 1 gram,9.6 milliliters of water will weigh 9.6 grams.Thus, 5 g of lead nitrate can dissolve in 9.6 millimeters of water.

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Answer:

No, the eggs are in direct contact with the metal pan, which is in direct contact with the gas flame, so this is conduction, not radiation

Reasons:
-Thermal energy is being transferred by conduction.

-Radiation transfers thermal energy by electromagnetic waves.

-Radiation does not transfer thermal energy by direct contact.

Radiation heat transfer is a process where heatwaves are emitted that may be absorbed, reflected, or transmitted through a colder "body". Sun heats the earth by electromagnetic waves. The sun does not come in physical contact with the Earth to transfer heat. (In my opinion, the Earth touching the sun would not be on my to-do list.)

Explanation:

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The work done to transport an electron from the positive to the negative terminal is 1.92×10⁻¹⁹ J.

Given:

Potential difference, V = 1.2 V

Charge on an electron, e = 1.6 × 10⁻¹⁹ C

Calculation:

We know that the work done to transport an electron from the positive to the negative terminal is given as:

W.D = (Charge on electron)×(Potential difference)

       = e × V

       = (1.6 × 10⁻¹⁹ C)×(1.2 V)

       = 1.92 × 10⁻¹⁹ J

Therefore, the work done in bringing the charge from the positive terminal to the negative terminal is 1.92 × 10⁻¹⁹ J.

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Based on my notes the answer must be B. horizontal layers

Answer:

B. horizontal layers

Explanation:

The net work done on the 300-N box while moving it at constant velocity across a 15-m level surface is zero. The correct option is A. When an object moves at a constant velocity, it means that there is no net force acting on it.

In this case, the cart is on a level surface, so there is no vertical force acting on it other than the gravitational force pulling it down and the normal force from the surface pushing it up. These forces are equal in magnitude and opposite in direction, so they cancel each other out.

Additionally, the cart moves horizontally at a constant velocity, implying that there is no net horizontal force. Therefore, the applied force (the force needed to push the cart) is equal and opposite to the friction force between the cart and the surface.

Since the forces acting on the cart balance each other out, there is no net force, and hence, the net work done on the cart is zero. Work is defined as the product of force and displacement, and since there is no net force, the net work done is also zero.

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Answer:

The volleyball's velocity at the moment it was tossed into the air was 10.78 m/s

Explanation:

To determine the volleyballs velocity at the moment it was tossed in air, we will find the initial velocity of the volleyball.

From the one of the equations of motions for free falling bodies,

v = u + gt

Since the body here is thrown upwards, the equation becomes

v = u - gt

Where v is the final velocity

u is the initial velocity

g is acceleration due to gravity (Take g = 9.8 m/s²0

and t is the time.

From the question,

The volleyball reaches its maximum height 1.1s later.

(NOTE: At maximum height, the final velocity of the ball will be 0 m/s)

Therefore,

v = 0 m/s

t = 1.1 s

Putting the values into the equation

v = u - gt

0 = u - (9.8)(1.1)

u = 9.8 × 1.1

u = 10.78 m/s

This is the volleyball's initial velocity.

Hence, the volleyball's velocity at the moment it was tossed into the air was 10.78 m/s.