10. If the angle of incidence is along the normal, what is the angle of reflection a) 0 b) 90 c) 30 d) 180

Answer:

It is 4,250 N

Explanation:

Mass of each boot:

\( = \frac{1}{2} \times 850 \\ \\ = 425 \: g\)

Weight:

\({ \sf{weight = mass \times acceleration}} \\ { \sf{weight = 425 \times 10}} \\ { \sf{weight = 4250 \: newtons}}\)

ANSWER:

3) 1234 m

STEP-BY-STEP EXPLANATION:

Precision refers to how close two measurements are to one another. The highest number with a significant digit is the most precise, the number that has the most significant figures. Therefore, the less accurate is the opposite.

Which means that in this case, the least precise number is 1234 m.

Answer:

gravitational force make the planet move around the sun on its orbit

Answer:

gravitational force makes planets orbit the sun

Answer:

The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

Explanation:

Answer:

Hey mate....

Explanation:

This is ur answer.....

According the NASA's StarChild Website, "The universe is a vast open space which contains all of the matter and energy in existence. The universe contains all of the galaxies, nebulae, stars, and planets. The exact size of the universe is unknown. Scientists believe the universe is still expanding outward.

The Universe is thought to consist of three types of substance: normal matter, 'dark matter' and 'dark energy'. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe.

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(a) The time taken by the stone to hit the ground is 3.27 seconds. (b) The horizontal distance that the stone lands from the base of the cliff is 52.32 meters.

Initial horizontal velocity, u = 16 m/s

Height of cliff, h = 150 m

(a) The time taken by the stone to hit the ground can be calculated using the kinematic equation given below: 

v² = u² + 2as

Here, s = h = 150 m and u = 16 m/s

Let's calculate the final velocity(v) of the stone. 

v² = u² + 2as

v² = 16² + 2(-9.8)(150)

=> v² = 2304v = √(2304)

=> v = 48 m/s

The final velocity(v) of the stone is 48 m/s. Now, let's substitute the values in the kinematic equation.

v = u + at48

= 16 + (-9.8)t48 - 16

= -9.8tt = (48 - 16) / 9.8t

= 32 / 9.8

=> t = 3.27 s

(b) The horizontal distance that the stone lands from the base of the cliff can be calculated using the formula given below: 

d = ut

Here, u = 16 m/s and t = 3.27 s

Substituting the values,

d = 16 × 3.27

d = 52.32 m

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It is true that electrostatic field line never cross. Always pointing outward from a positively charged ions and in the direction of a negative point are electric field lines.

Each object in space has an electric field associated with it when there is charge existing in any form. The value of E, often known as the electric field strength, electric field intensities, or simply as the electromagnetic current, expresses the direction and magnitude of the electric field.

E=Fq k|Q|r2 test. The size of the electrostatic field produced by a single electron Q is determined by this equation. The distance Q first from center of the cylindrical charge to the place of interest is represented by the different distance in the denominator.

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Answer:

Srry for the delay but this might help ppl in the future

Explanation:

PEACE OUT!

heating of anything increases the kinetic energy of its molecules, so the molecules will move faster.

A helium balloon's temperature is raised by 1°C. This will cause molecules to move faster.

The temperature has an impact on this average kinetic (motional) energy. Their average kinetic energy likewise rises when gas molecules warm up.

As a result, they travel more quickly and collide more frequently and violently inside the balloon. The temperature has an impact on the hot air balloon's internal pressure. The molecules move more quickly and forcefully against the interior wall of the balloon as they warm up.

A region of the balloon is subjected to more force due to the gas particles' greater velocity, which raises the pressure there.

Therefore, the temperature of a helium balloon is increased by 1°C. Molecules will move more quickly as a result.

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For example, in machine components it is common to use kinematics analysis to determine the (unknown) speed of an object, that is connected to another object moving at a known speed. For example, one may wish to determine the linear velocity of a piston connected to a flywheel that is turning at a known speed.

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Pressure is a measure of force per unit area:

P = F/A

The water exerts a pressure of 202 kPa = 202,000 Pa on the diver, who has a surface area of 1.50 m². Then the force exerted by the water is F such that

F = PA

F = (202,000 Pa) (1.50 m²)

F = 303,000 N = 303 kN

Answer:

The level of seed in each feeder

Explanation:

The independent variable is the variable which is the suspected cause of an observation, it is the variable that produce the effect observed in the dependent variable. The dependent variable is the variable that is measured

The independent variable is normally the x-value while the dependent variable is the y-value

In the question, Lana wants to find out the kind of birdseed that the neighborhood birds like (to eat) the most by feeding them different types of birdseed and measuring the level of the birdseed in the feeders at regular intervals

the independent variable is the bird seed types which Lana gives to the birds, to determine the type of bird seeds the birds like

The dependent variable is the level of the seed in the feeder which depends on the type of seeds the birds like.

The answer is true. Parentheses are used in Boolean expressions to eliminate confusion as to which operation is to be performed first.

The answer is true. Parentheses are used in Boolean expressions to eliminate confusion and clarify the order of operations, ensuring that the desired operation is performed first. They help in maintaining the correct precedence and associativity of operations in the expression.

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Answer:

Explanation:

magnetic field B = (3 i + 8 x 2 j )x 10⁻³ T

= (3 i + 16 j )x 10⁻³ T

L = - i ( unit length of conductor )

Force F = I ( L x B ) , I is current

= 5 [ - i x ( 3i + 16 j ) 10⁻³]

= 5 ( - 16 k ) x 10⁻³

F = - 80 x 10⁻³ k

None of the options listed is a negative externality. A negative externality is an unintended consequence of an economic activity that affects a third party who is not directly involved in the activity.

If I were to choose: Businesses would not necessarily increase hiring rates.

This could be considered a negative externality because the grant funding is intended to fund job training in order to increase employment opportunities, but if businesses do not increase their hiring rates despite having a pool of trained workers, then the intended benefit of the grant may not be fully realized. This could result in a loss of resources and a missed opportunity to address unemployment in the community.

Doubling the kinetic energy of a car does not change its momentum. Momentum is determined solely by the mass and velocity of the object, independent of its kinetic energy.

Kinetic energy and momentum are two different physical quantities that describe the motion of an object. Kinetic energy depends on the mass and velocity of an object, while momentum depends only on the mass and velocity.

When the kinetic energy of a car is doubled, it means that the car's velocity is increased while its mass remains the same. However, momentum is the product of mass and velocity, so if the mass remains constant, any change in kinetic energy does not directly affect momentum.

Mathematically, the formula for kinetic energy is KE = (1/2)mv^2, where KE represents kinetic energy, m represents mass, and v represents velocity. On the other hand, momentum is given by the formula p = mv, where p represents momentum. As we can see, kinetic energy involves velocity squared, while momentum only involves velocity.

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Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

f is the force

m is the mass

From the question we have

\(a = \frac{50}{100} = \frac{1}{2} \\ \)

We have the final answer as

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A) As the balloon is blown up, the total flux through the balloon's surface increases. This is because the balloon is increasing in size, so more of the charged ball's electric field is passing through the balloon's surface.

Flux is a term used to describe the rate of flow of a fluid or energy. It is typically measured in terms of the amount of material, energy, or particles that pass through a given surface area per unit of time. For example, in physics, the flux of a vector field is a measure of the amount of the vector field passing through a given surface area. Flux is also used in engineering, such as in the study of heat transfer and electrochemistry.

B) As the balloon is blown up, the flux per unit surface area decreases. This is because although the balloon is increasing in size, the amount of electric field passing through the same amount of surface area is decreasing. This is because the electric field from the charged ball is spread out over a larger area as the balloon increases in size.

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In this scenario, the independent variable is the amount of sleep and the dependent variable is the academic performance in English and math classes.

In this research, a researcher is studying the effect of sleep on academic performance. She thinks that less sleep will lead to lower grades. Therefore, she has some people sleep six hours per night. Some people sleep three hours per night, and some people sleep as much as they want.

She then monitors academic behavior during English math classes among participants.

The independent variable here is the amount of sleep that the participants get each night. It is the variable that is being manipulated or changed by the researcher.

The researcher is interested in studying the effect of different amounts of sleep on academic performance. Therefore, the amount of sleep is the independent variable.

The dependent variable is the academic performance of the participants in English and math classes. It is the variable that is being measured by the researcher. The researcher wants to know how different amounts of sleep affect academic performance.

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Answer:

it is 5

Explanation:

Answer:

According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object has a negative acceleration. In Example D, the object is moving in the negative direction (i.e., has a negative velocity) and is speeding up.

Explanation:

The conclusion that you might arrive at is that the speed of the car affects the gas mileage.

We know that an experiment is the only way that we can be able to establish cause and effect relationship. We know that the speed would affect the consumption of the gas. By varying the speed of the car, we can be able to obtain the effect that it has on the mileage.

Thus, the conclusion that you might arrive at is that the speed of the car affects the gas mileage.

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The correct conductor ampacity for a 10-horsepower, 230-volt, single-phase motor is option c. 62.5 A.

The ampacity of a conductor is a measure of the maximum amount of electrical current that can flow through it safely. The ampacity required for a motor is based on the size of the motor and the voltage of the electrical system. There are standard methods for determining the minimum ampacity for a given motor and voltage, such as the National Electric Code (NEC) and the American National Standards Institute (ANSI). The NEC and ANSI both state that the minimum ampacity for a 10-horsepower, 230-volt, single-phase motor is 62.5 amperes. It's important to note that using a conductor with ampacity lower than the recommended one may cause the motor to overheat and fail, leading to damage or even fire hazard.

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B. STATIC ELECTRICITY

IS THE CORRECT ANSWER.

JUST FOR MORE KNOWLEDGE ,,...

EVERY ATOM OF MATTER HAS ELECTRONS , AND THESE ELECTIONS HAVE NEGATIVE ELECTRIC CHARGE WHEN YOU RUB TWO OBJECTS TOGETHER, YOU CAN CAUSE THESE CHARGES TO MOVE FROM ONE OBJECT TO ANOTHER .THIS PULLING FORCE BETWEEN UNLIKE CHARGES IS CALLED STATIC ELECTRICITY .

Answer:

A lens

Explanation:

A lens forms images when light passes Through it bending the rays of in the process.A phenomena called refraction and the speed of light changes in the process because it enters a medium since it's wavelength is reduced.