A Gallup Poll in November 2012 found that 54% of the people in the sample said they wanted to lose weight. The poll's margin of error for 95% confidence was 4%. This means that...

The angle of diffraction of the blue light that passed through a slit of a diffraction grating is 63.5⁰.

The angle of diffraction of the blue light that passed through a slit of a diffraction grating is calculated as follows;

mλ = dsinθ

sin θ = mλ/d

sin θ = (1 x 425)/475

sin θ = 0.8947

θ = sin⁻¹(0.8947)

θ = 63.5⁰

Thus, the angle of diffraction of the blue light that passed through a slit of a diffraction grating is 63.5⁰.

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Answer:

12 is the angle of diffraction

Explanation:

edge

If a star collapses to a tenth its size, gravitation at its surface increases by 100 times as much.

The contraction of an astronomical object caused by its own gravity, which tends to pull stuff inward toward the center of gravity, is known as gravitational collapse. A cloud of interstellar matter gradually collapses under the influence of gravity to form a star. The temperature rises as a result of the compression brought on by the collapse until thermonuclear fusion takes place in the star's core. At this point, the collapse gradually comes to an end as the outward heat pressure equalizes the gravitational forces. Following that, the star is in a condition of dynamic equilibrium. A star will repeatedly collapse once all of its energy sources have been used up until it reaches a new equilibrium condition.

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Answer:

B yes when displacement is negative

Answer:

The correct answer is H ÷ ¹/₂T

Explanation:

The formula for velocity is distance covered ÷ time.

Neglecting air resistance;

If the ball's time of overall time flight is T, the time it will take for the second half/return trip is ¹/₂T.

If the ball's maximum height above its released point is H, the height will also be the distance it covered for the second part of the trip since the student caught the ball in the exact same place the ball was thrown. Hence, the distance for the second half of the trip will be H.

Since velocity = distance/time

The average velocity during the second half of the trip will be = H ÷ ¹/₂T

Answer:

Sound

Amplitude Wave

Pitch

Strenght

Explanation:

A baseball player standing at the edge of a vertical cliff throws a baseball initially in the horizontal direction four times with four different horizontal speeds. Which of the following statements is true in regards to the time of flight?The time of flight is the same for all four baseballs.

The statement, "The time of flight is the same for all four baseballs" is true regarding the time of flight in regards to the four baseballs that the baseball player throws initially in the horizontal direction from the edge of the vertical cliff. This is because the only factor that affects the time of flight is the vertical velocity. Since there was no vertical velocity, the time of flight will remain the same.

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The magnitude of the frictional force is 4,676N.

Frictional force:

Friction is the force that resists motion when the surface of one object comes in contact with the surface of another.

By Newton's second law, the sum of the forces, ∑F, is equal to the product of the mass, m, and its acceleration:

∑F = ma

Weight (W) = mg

∑F = ma

\(F_{f}\)= frictional force

W - \(F_{f}\) = ma

\(F_{f}\)  = W - ma

    = mg- ma

    = m(g - a)

    = 560( 9.8 - 1.45)

    = 4676N

Therefore the frictional force is 4,676N.

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Explanation:

480km = 480000m

12hr = 43200 sec

480000/43200 = 11.1111111111

round up 2 sig fig

11m/s

answer is 11m/s

Answer:

-5 N of force

Explanation:

Hope it helps!

Answer:

13.2 meter

Explanation:

because the initial velocity was zero

Given :

Initial velocity, u = 12.5 m/s.

Height of camera, h = 64.3 m.

Acceleration due to gravity, g = 9.8 m/s².

To Find :

How long does it take the camera to reach the ground.

Solution :

By equation of motion :

\(h = ut+\dfrac{gt^2}{2}\)

Putting all given values, we get :

\(12.5t+\dfrac{9.8t^2}{2}=64.3\\\\4.9t^2+12.5t=64.3\)

t = 2.56  and t = −5.116.

Since, time cannot be negative.

t = 2.56 s.

Therefore, time taken is 2.56 s.

Hence, this is the required solution.

The amount of heat rate that needs to be removed is approximately -174,034 J to cool the steel strip from 597°C to 47°C, considering a mass of 0.47 kg and specific heat capacity of 682 J/kg·K for AISI 1010 carbon steel. The negative sign indicates heat removal.

To determine the amount of heat rate that needs to be removed, we can use the equation:

Q = m × cp × ΔT

where Q is the heat rate, m is the mass of the steel strip, cp is the specific heat capacity of the steel, and ΔT is the temperature difference.

Given:

Density of AISI 1010 carbon steel strip: 7832 kg/m³

Thickness of the strip: 2 mm = 0.002 m

Width of the strip: 3 cm = 0.03 m

Speed of the strip: 1 m/s

Initial temperature: 597°C

Final temperature: 47°C

Specific heat capacity of carbon steel (cp): 682 J/kg·K

First, let's calculate the mass of the steel strip:

Mass (m) = density × volume

Volume = thickness × width × length (length is not provided)

Assuming the length is not a factor in the calculation, we can simply use the cross-sectional area of the strip for the volume calculation.

Volume = thickness × width × length

Volume = 0.002 m × 0.03 m × 1 m = 0.00006 m³

Mass (m) = density × volume

m = 7832 kg/m³ × 0.00006 m³ = 0.46992 kg ≈ 0.47 kg

Next, calculate the temperature difference (ΔT):

ΔT = Final temperature - Initial temperature

ΔT = 47°C - 597°C = -550°C

Now, substitute the values into the equation Q = m × cp × ΔT:

Q = 0.47 kg × 682 J/kg·K × (-550°C)

Q ≈ -174,034 J

The negative sign indicates that heat needs to be removed from the steel strip. Therefore, the amount of heat rate that needs to be removed to avoid instantaneous thermal burn upon accidental contact with skin tissue is approximately 174,034 J.

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The change in gravitational potential energy is the same for both balls, leading to the conclusion that the change in kinetic energy must also be the same.

a) The ball will have maximum kinetic energy.

When all the initial energy of the ball is converted into kinetic energy, the ball will have the maximum possible kinetic energy. This occurs when the ball is released from a height and falls to the ground without any loss of energy due to friction or air resistance.

The ball will be moving at its maximum speed when all its initial energy is converted into kinetic energy.

b.The ball will experience a greater change in kinetic energy.

The amount of kinetic energy of a moving object is proportional to its velocity squared. Therefore, if the ball is in the air longer, it will have more time to accelerate due to the force of gravity and gain more velocity, resulting in a greater change in kinetic energy.

A longer duration in the air will result in a greater change in kinetic energy for the ball.

c. The change in kinetic energy must be the same for both balls.

The change in gravitational potential energy of a ball that is dropped from a certain height is determined by the height of the drop and the gravitational field strength. Since the height and gravitational field strength are the same for both balls, the change in gravitational potential energy will be the same.

According to the law of conservation of energy, the change in gravitational potential energy must be equal to the change in kinetic energy. Therefore, the change in kinetic energy must be the same for both balls.

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Answer:

Physical science

Explanation:

Answer:

B) Measuring cylinder

Explanation:

Answer:

Explanation:

Think about hockey for little to no friction if you push on the puck it moves fast and far.

Now imagine taking the same puck and pushing it on gravel or grass it will not have the same motion.

Answer:

D. All of the above

Explanation:

Because it's the most logical answer.

Displacement of diver , d = 6000-1260 = 4740 m.

Let, time taken be t .

By equation of motion :

\(v^2-u^2=2gs\\\\v=\sqrt{2gs}\\\\v=\sqrt{2\times 9.8\times 4740}\ m/s\\\\v=304.8\ m/s\)

Now , by equation :

v = u +gt

304.8 = 0 + 9.8t

t = 31.1 seconds

Hence, this is the required solution.

No, not necessarily, as velocity is the speed in a given direction and if the car is moving in a straight line, then the velocity is constant.

But if it is moving on a circular track, then the direction is constantly changing, leading to a change in velocity even if the speedometer reads a constant 35 mph.

The term velocity is used to describe both the speed and the direction of an object's motion. In other words, velocity is a vector quantity, which has both magnitude and direction. If an object moves at a constant speed in a straight line, then its velocity is constant because the direction of its motion is not changing. In this case, the speedometer reading of a constant 35 mph would indicate a constant velocity.

However, if the object moves on a circular track, then its direction of motion is constantly changing, even if the speedometer reading remains at a constant 35 mph. As a result, the object's velocity would not be constant, since the direction is constantly changing.

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A graphical representation of both amplitude and direction is called: Vector

A vector is a graphical representation of both amplitude and direction. In physics and mathematics, a vector is a quantity that has both magnitude and direction.

It is often represented by an arrow in a graph or diagram, where the length of the arrow represents the magnitude or amplitude, and the direction of the arrow indicates the direction of the vector.

Vectors are commonly used to represent physical quantities such as displacement, velocity, force, and acceleration.

By using vectors, it becomes possible to describe quantities that have both a numerical value and a specific direction in a concise and graphical way.

In addition to their graphical representation, vectors can also be expressed mathematically using coordinates or components. The components of a vector describe its magnitude in different directions, often along orthogonal axes.

Understanding vectors and their graphical representation is essential in various fields, including physics, engineering, and computer graphics, as they provide a powerful tool for analyzing and visualizing quantities with both magnitude and direction.

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200N towards south are the magnitudes and direction of both the resultant force and equilibrant force.

Define force

A force is an effect that changes, or accelerates, the motion of a mass-containing object. It is a vector quantity since it can be a push or a pull and always has magnitude and direction.

The entire force operating on the item or body, combined with the body's direction, is referred to as the resultant force. When the object is stationary or moving at the same speed as the object, the resultant force is zero.

Between F1 and F2 , resultant force will be 100N towards 45.0degrees north of west,

The total resultant force will be 100+100 i.e. 200N towards south.

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When you remove the lid from a food container that has been left in a freezer for several months, the cold air inside the container causes the moisture inside the container to freeze onto the underside of the lid.

Food container that has been left in a freezer for several months we  discover a large collection of ice crystals on the underside of the lid this is due to the formation of a layer of ice crystals as the water vapor in the container condenses and freezes onto the cold surface of the lid. This process is known as sublimation and is why you find a layer of ice crystals on the underside of the lid.

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Here is your Answer:-

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object. (That hot sand passed the heat energy right into my poor feet)!

Answer:

Conduction is the transfer of thermal energy from one object to another through the movement of molecules. Heat flows from one molecule to another because the particles are in direct contact with one another.

The melting point of a substance is the temperature at which the substance changes its phase from solid to liquid.

The freezing point is the temperature at which the substance changes its phase from liquid to solid.

The melting point of a substance is the same as the freezing point. That is when the temperature of the substance in the liquid form is increased continuously, the temperature at which the substance turns into a solid is equal to the temperature at which the substance will turn into liquid from solid if the temperature is decreased continuously, from a higher temperature.

the meter stick so that it is in balance is 56 cm

Taking the equilibrium of Torque about C

200g (40 + x) + 100g x = 400g (30 - x)

200 (40 + x) + (100) x = (400) (30 - x)

x = 5.71

so location = 50 + 5.71 = 55.71 cm = 56 cm

chemical equilibrium is the state during a reversible chemical process where there is no net change in the amounts of reactants and products. When a chemical reaction is reversible, the products react with the original reactants as soon as they are created. There is no net change in the quantity of the constituent substances when the two opposing processes are in equilibrium because they are occurring at identical rates or velocities. The reaction may now be regarded as being finished, meaning that the maximal amount of reactants to products has been converted under the given reaction conditions.

It is possible to quantify the equilibrium-related conditions. For instance, in the reversible reaction A B + C,

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Answer:

(I)W=18×10³ J

(ii) P=720W

Explanation:

30 Bricks = 1brick weight× 30 Bricks

30 Bricks= 12×30

=360N

Distance=50m

Time= 25s

1. Work done= Force× Distance

=360×50

= 18×10³ J

2. Power= Work done/ Time

18×10³/25

Power= 720W.

These extensions provide a set of floating-point instructions that can be used to perform operations on floating-point numbers using the floating-point registers.

Adder-based multiplication and division are two different operations that use different circuitry to perform them. An adder-based multiplier works by adding a sequence of shifted partial products together to produce the final result. On the other hand, adder-based division is not used in modern computers because it is much slower and less efficient than other algorithms that can perform division more quickly.

Therefore, there is no adder-based division. In RISCV, the floating-point instructions operate on the floating-point registers, which are separate from the integer registers. The floating-point instructions use a separate set of registers, which are designed specifically for storing floating-point numbers. The floating-point registers are typically used to perform operations on floating-point numbers, such as addition, subtraction, multiplication, and division. Some of the most commonly used floating-point instructions include FADD, FSUB, FMUL, and FDIV. These instructions are used to add, subtract, multiply, and divide floating-point numbers respectively. In RISCV, the floating-point instructions are part of the RV32F and RV64F instruction set extensions, which provide support for single-precision and double-precision floating-point arithmetic respectively.

These extensions provide a set of floating-point instructions that can be used to perform operations on floating-point numbers using the floating-point registers.

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Answer:

288.8kg

Explanation:

Given parameters:

Weight  = 2830N

Unknown:

mass of this weight  = ?

Solution:

Weight is the vertical component of force that acts on a body.

       Weight  = mass x acceleration due to gravity  

  So;

      Mass  = \(\frac{2830}{9.8}\)    = 288.8kg

An object's momentum is a measure of its motion, defined as the product of its mass and its velocity. This means that an object with a large mass moving at a high velocity will have greater momentum than an object with a smaller mass moving at a slower velocity.

The momentum of an object is a vector quantity, which means it has both magnitude and direction. The direction of an object's momentum is the same as the direction of its velocity. This means that if an object is moving north, its momentum is also northward. Momentum is an important concept in physics, particularly in the study of collisions and interactions between objects.

In these situations, the total momentum of a system is conserved, meaning that the sum of the momenta of all objects involved remains constant before and after the interaction. This principle is known as the law of conservation of momentum and is crucial for understanding the behavior of objects in motion.

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