Elements heavier than iron originate? a. in the cores of high-mass stars. b. in the cores of low-mass stars. c. in the explosions of high-mass stars. d. in the big bang.

Answer:

the answer is 90 m/s

Explanation:

.....

Venus has relatively few impact craters and these craters are distributed fairly evenly over the entire planet.

-This suggests that older impact craters were covered over everywhere on the planet.

The solar system is an arrangement of the sun and the planets. The sun is at the focus of the solar system and it is surrounded by the planets moving radially outwards from the focus. This is the heliocentric model of the solar system.

Now, the magnitude of gravity on a planet determines the weight of a body on that planet. The greater the gravitational pull, the greater the weight of the object on that planet.

Learn more about planets here:- https://brainly.com/question/28396172

#SPJ4

Answer:

3586

Explanation:

by using formula s=it+0.5at^2

Answer:

\(\fbox {Velocity = 60 m/s, Distance = 3600 m}\)

Explanation:

Part (i) : Velocity at end of 2 minutes

Equation used ⇒ \(\boxed {v = u + at}\)

⇒ t = 2 minutes = 2 x 60 = 120 seconds

⇒ v = 0 + (0.5)(120)

⇒ v = 60 m/s

Part (ii) : Distance covered

Equation used ⇒ \(\boxed {S = \frac{v^{2}-u^{2}}{2a}}\)

⇒ S = (60)² - (0)² / 2(0.5)

⇒ S = 3600 m

Answer:

Please find the answer in the explanation

Explanation:

What happens to a digital signal sent using electromagnetic waves as it travels farther from its source?

Solution.

To transmit a signal, the analogue signal is first modulated and converted to digital signals.

The digital signals transmitted through electromagnetic waves like radio wave or microwave can experience attenuation over a long distance as they tend to pass through tissues and wall.

The frequency and the intensity of wave continue to decrease as the wave tend to propagate through the wall and tissues.

To correct this, there must be a device to amplify the signal at the strategic points.

After this, the signal will be demodulated back to the analogue signal.

Therefore, attenuation may occur as the signal tend to pass through the tissues and office walls.

Answer:

The signal becomes weaker and more difficult to detect

Explanation:

got it right on my quiz

Answer:

I think it's D

Explanation:

because kinetic basically means moving and potential mean sitting still so ig it's c or D

The pendulum bob B of mass M is released from rest when \(\theta=0^0\). the tension in the cord at the instant the bob reaches point D, \(\theta = \theta1 = 45^0\) is 41.72 N.

The motion of a simple pendulum is idealized. It consists of a point mass attached to an inextensible, massless cable or rod suspended from a pivot point. The pendulum oscillates about the pivot point in a plane that is orthogonal to the rod or cable and has a period that depends solely on the pendulum's length and gravitational acceleration.

As a result, the time period of a pendulum is calculated. The time it takes for a pendulum to swing back and forth is referred to as the time period. It is denoted by T and measured in seconds.

A simple pendulum's time period is calculated using the formula:

\(T = 2\pi(L/g)^{(1/2)}\)

where T = time period, L = length of the pendulum, and g = acceleration due to gravity = \(9.81 m/s^2\).

Tension in the string at the time of release \(\theta = 0^0\)in the pendulum. It implies that the pendulum is vertical. At this point, the tension in the cable is equal to the weight of the bob.

Mg = Tension = 3 x 9.81 = 29.43 N

When the bob reaches point D, \(\theta = \theta1 = 45^0\), the tension in the cord is determined. At point D, the velocity of the bob is

\(v = L\sqrt2gL = \sqrt(2 * 9.81 * 2) = 6.26 m/s\)

Kinetic Energy of bob KE = \((1/2)mv^2KE = (1/2) * 3 * (6.26)^2 = 58.46 J\)

Potential energy of the bob at D = mghU = mghU = 3 × 9.81 × (2 - 2cos45) = 39.22 J

Total mechanical energy at D = KE + U58.46 + 39.22 = 97.68 J

The total mechanical energy at D is equal to the initial mechanical energy since no energy is lost in the absence of any external forces.

WE = KE + UE = PE = mgh = 3 x 9.81 x 2 = 58.86 J

From the formula of total mechanical energy,

WE = Tension x L cosθTension

= (WE / L cosθ)Tension = (58.86 / (2cos45))

= 41.72 N

Therefore, the tension in the cord at the instant the bob reaches point D, \(\theta = \theta1 = 45^0\) is 41.72 N.

Learn more about pendulum here:

https://brainly.com/question/29702798

#SPJ11

Answer:

Golfer B hits his golf ball at a higher rate of speed and with more force. This means that golfer B's ball will travel for a longer period of time and a longer distance due to newtons first law, where it says an object in motion stays in motion, with the same speed and in the same direction.

Explanation:

Answer: 0.043mm/s

Explanation:

The drift speed of electron in this wire will ba calculated as:

= I/nqA

= I/nqπr²

= 3.7/[(1.1 × 1^29) × (1.6 × 10^19) × (3.14 × 0.00125²)

= 4.3 × 10^-5

= 0.043mm/s

The drift speed of the electron in this wire is 0.043mm/s.

The velocity of the gun against Bill's shoulder can be calculated using the conservation of momentum equation, taking into account the mass of the bullet and the gun.

To calculate the velocity of the gun against Bill's shoulder, we can use the conservation of momentum equation, which states that the total momentum before an event is equal to the total momentum after the event.

Before firing the gun, the total momentum is zero because the gun and bullet are at rest.

After firing the gun, the total momentum must still be zero, but now the bullet has a momentum equal to its mass times its velocity, while the gun has a momentum equal to its mass times its velocity in the opposite direction.

Therefore, we can set up the equation: 0 = (0.02 kg)(98 m/s) + (1.8 kg)(-v), where v is the velocity of the gun against Bill's shoulder. Solving for v, we get v = -1.08 m/s.

This negative velocity indicates that the gun recoils backwards against Bill's shoulder with a velocity of 1.08 m/s.

In other words, the force of the bullet leaving the gun creates an equal and opposite force on the gun itself, causing it to move backwards.

This recoil can be felt by the shooter, and can even cause discomfort or injury if the gun is not held firmly enough.

Learn more about force  here.

https://brainly.com/questions/30507236

#SPJ11

A device that produces a magnetic field by wrapping wire into a coil is an electromagnet. It is a magnet in which the magnetic field is generated by an electric current.

An electromagnet is a type of magnet in which a magnetic field is generated by an electric current. Electromagnets are usually made of wire wound into a coil. The current flowing through the wire creates a magnetic field which is concentrated in a hole in the center of the coil. When the current is switched off, the magnetic field disappears. Wire coils are usually wrapped around a core made of a ferromagnetic or ferrimagnetic material such as iron; the core concentrates the magnetic flux and is a stronger magnet. The biggest advantage of electromagnets over permanent magnets is that the magnetic field can be changed quickly by controlling the amount of current in the windings. Unlike permanent magnets, which do not require a power source, electromagnets require a constant supply of electric current to maintain a magnetic field.

Electromagnets are widely used as components of other electrical equipment such as electric motors, generators, electromechanical solenoids, relays, speakers, hard drives, MRI machines, scientific instruments, and magnetic separation equipment . Electromagnets are also used in industry to lift and move heavy ferrous objects such as scrap metal and steel.

Learn more about electromagnet:

https://brainly.com/question/3427992

#SPJ4

1) current

2) in series

3) voltage

4) In parallel

Ammeters are connected in series with the component or part of the circuit being measured, so that the entire current flows through the ammeter. This means that the ammeter must have a very low resistance, so that it does not significantly alter the current being measured. Typically, ammeters have a built-in shunt resistor to achieve this low resistance.

On the other hand, voltmeters are connected in parallel with the component or part of the circuit being measured, so that they measure the voltage across the component or part. This means that the voltmeter must have a very high resistance, so that it does not draw significant current from the circuit and alter the voltage being measured. Typically, voltmeters have a built-in series resistor to achieve this high resistance.

Learn more about ammeter:https://brainly.com/question/30849022

#SPJ1

Answer:

Amoeba (plural = amoebae) is a well known genus of unicellular organism, a protist. One of its most common species, the Amoeba Proteus, is about 0.2 to 0.3 mm large. The amoeba was first discovered by August Von Rosenhof in 1757.[1] It is a genus of protozoa that moves with false feet, called pseudopodia.

It's a single - called animal that catches good and moves around by extending fingerlike projections of protoplasm

The magnitude of the horizontal component of the projectile's displacement at the end of 2 seconds is approximately 44.69 meters. The projectile takes approximately 2.81 seconds to reach the highest point in its trajectory.

Given:

- Launch angle (θ) = 55.0 degrees

- Initial speed (v₀) = 35.0 m/s

- Time (t) = 2 seconds

To find the magnitude of the horizontal component of the displacement, we can use the formula:

x = v₀x * t

The horizontal component of the initial velocity can be calculated using:

v₀x = v₀ * cos(θ)

Plugging in the values, we have:

v₀x = 35.0 m/s * cos(55.0°) ≈ 20.64 m/s

Substituting v₀x and t into the displacement formula, we get:

x = 20.64 m/s * 2 s ≈ 41.28 m

Therefore, the magnitude of the horizontal component of the projectile's displacement at the end of 2 seconds is approximately 44.69 meters.

To find the time taken to reach the highest point in the trajectory, we can use the formula for the time of flight:

t_flight = 2 * (v₀y / g)

The vertical component of the initial velocity can be calculated using:

v₀y = v₀ * sin(θ)

Plugging in the values, we have:

v₀y = 35.0 m/s * sin(55.0°) ≈ 28.38 m/s

Substituting v₀y and the acceleration due to gravity (g ≈ 9.8 m/s²) into the time of flight formula, we get:

t_flight = 2 * (28.38 m/s / 9.8 m/s²) ≈ 2.90 s

Therefore, it takes approximately 2.81 seconds for the projectile to reach the highest point in its trajectory.

- The magnitude of the horizontal component of the projectile's displacement at the end of 2 seconds is approximately 44.69 meters.

- It takes approximately 2.81 seconds for the projectile to reach the highest point in its trajectory.

To know more about projectile visit:

https://brainly.com/question/8104921

#SPJ11

Answer:

The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.

Note:

Please mark as Brainliest, or i'll go to your house and kidnapp your family, lol

(it's a joke btw)

Answer:The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.

Explanation:Formula of Net Force

FN is the force acting on a body. When the body is at rest, the net force formula is given by, FNet = Fa + Fg.

I think that's correct

Answer:

Earths shadow covering the moon would create a lunar eclipse.

Explanation:

because i just know

A lunar eclipse is occur when Earth’s shadow is covering the moon.

An eclipse happens when one astronomical body like Earth or moon blocks light from or to another.

A lunar eclipse is caused by Earth blocking sunlight from reaching the moon and causing a shadow across the lunar surface.

Sometimes when the Moon orbits Earth, the Moon moves between the Sun and Earth. When this happens, the Moon blocks the light of the Sun from reaching Earth. This causes an eclipse of the Sun, or a solar eclipse.

To know more about eclipse here

https://brainly.com/question/4279342

#SPJ2

Answer:

Here's what I get  

Explanation:

When two waves meet, they interfere with each other.

1. Constructive interference

If the crests of the waves happen to line up, as in Fig. 1,  the amplitudes add up.

The crests become twice as high. The troughs also line up, so they become twice as deep.

We call this constructive interference.

2. Destructive interference

If the trough of one wave meets the crest of another, as in Fig. 2, the opposite happens.

The trough of one wave subtracts from the crest of the other, so the two waves cancel.

We call this effect destructive interference.

the barriers if the interval are Aand B the of displacement goes up.

from B to C it just stays the same, then from C to D no Movement, and from time D to E movement, but steady

The statement "before each trial one should reshape the bob into something like a ball" is false regarding the experiment.

If we assume the collision between the bob and the box is completely inelastic, then shape of the bob does not play any role in the time period of the plumb bob or the collision impact of the bob on the box. However the second statement which says that the initial position for the box should be just touching the pendulum bob, is true. This is because then initial position of the bob will become the mean position and we know at the mean position the kinetic energy of the bob is maximum.

For the third statement, the pendulum bob should hit close to the bottom of the box during the collision to make the box move, is also true. This is because the bottom surface experiences the maximum friction force, which can be reduced at maximum amount if bob impact closer to the bottom.  

To know more about reshape, here

https://brainly.com/question/8799327

#SPJ4

answer :

D. 6370.92 m

Explanation:

pls refer to the attachment...

Answer:

Acceleration would be \(1.96\) times the initial value.

Explanation:

The vehicle is in a centripetal motion as it rounds the circular curve. Acceleration of the vehicle during the motion would be:

\(\displaystyle a = \frac{v^{2}}{r}\),

Where:

In this question, \(r\) stays the same since the vehicle is rounding the same curve. Acceleration of the vehicle would be proportional to the square of velocity.

The new velocity of the vehicle is \((70 / 50)\) times the original one. Hence, the new acceleration would be \((70 / 50)^{2} = 1.96\) times the original value.

Answer:

They include;

1. Earthquakes

2. Floods

3. Hurricane

4. Landslide

5. Tsunami

6. Tornadoes

Explanation:

Emergencies are sudden disasters that occur occasionally and unexpectedly, resulting in massive destruction of lives and property, and which require prompt actions to resolve. When some of these emergency situations occur, the electric grids could fail, resulting in a power outage in the affected town or community. Rescue workers might then find communication difficult because they cannot get energy to their electrical devices.

Examples of emergency situations that could have this type of effect include; Earthquakes, Floods, Hurricane, Landslide, Tsunami, and Tornadoes.

The formula xy = k or y = kx can be used to represent an inverse variation. If a nonzero constant k exists such that xy = k or y = kx where x≠ 0, y ≠ 0, then y varies inversely as x.

A variable is inversely varying with respect to another variable when the term "inverse variation" is used. It symbolizes how two quantities are inversely related. This means that one variable is inversely proportional to another. Relationship in mathematics between two variables that can be described by an equation in which the sum of the two variables equals a constant.

As one quantity rises, the other falls for two quantities with inverse variation. For instance, as your speed increases while travelling to a specific location, it will take you less time to get there.

To know more about inverse variation visit:

https://brainly.com/question/23389775

#SPJ4

(a) There is only one degree of freedom in this problem since the collar can move along the shaft but cannot rotate. The constraints are that the distance between the collar and the pivot point is always equal to l, and the collar cannot move perpendicular to the shaft.

(b) The forces acting on the collar are the spring force and the gravitational force. Since the collar is sliding along a frictionless shaft, there is no frictional force. The equation of motion for the collar is given by:

m(d²x/dt²) = -k(x-l) - mg

where x is the displacement of the collar from its equilibrium position.

(c) The normal force between the collar and the shaft is perpendicular to the shaft and balances the component of the gravitational force that is perpendicular to the shaft. As the collar moves away from its equilibrium position, the spring force becomes unbalanced and the normal force changes accordingly. The normal force is given by:

N = mgcos(θ) + k(x-l)sin(θ)

where theta is the angle between the shaft and the vertical axis.

To learn more about force refer to:

brainly.com/question/13191643

#SPJ4

The thickness of the book is 10.40 mm thick.

The reason we learn math is to apply this to real life. We learn addition, subtraction, multiplication, division, and all other mathematical operation with the aim that we can use that in real-life problems. Given problem is one of the examples where we will use math in a real-life situation.

200 pages means that there are 100 papers.

1 paper = 0.1mm

So, 100 papers = 0.1* 100 = 10mm

There are two covers of 0.2mm each, therefore

Total thickness = 10 + 2*0.2

= 10 + 0.4

= 10.4 mm

Hence, thickness of the book is 10.40 mm thick.

Learn more about Thickness here:

https://brainly.com/question/4937019

#SPJ1

The thickness of the book is 10.40 mm thick.

Learning math is done so that you can use it in real-world situations. It is our intention to be able to use addition, subtraction, multiplication, division, and all other mathematical operations to solve problems that come up in daily life. The given problem is one of the situations where math will be used in a practical setting.

200 pages means that there are 100 papers.

1 paper = 0.1mm

So, 100 papers = 0.1* 100 = 10mm

There are two covers of 0.2mm each, therefore

Total thickness = 10 + 2*0.2

= 10 + 0.4

= 10.4 mm

Hence, thickness of the book is 10.40 mm thick.

Learn more about Thickness here:

brainly.com/question/4937019

#SPJ1

The compression of 10 cm by a 100 N force on the plane that has a

coefficient of friction of 0.39 give the following values.

Mass of the block, m = 3 kg

\(Spring \ constant, K = \dfrac{100 \, N}{0.1 \, m} = \mathbf{ 1000\, N/m}\)

Coefficient of kinetic friction, \(\mu_k\) = 0.39

Therefore, we have;

Friction force = \(\mathbf{\mu_k}\)·m·g·cos(θ)

Which gives;

Friction force = 0.39 × 3 × 9.81 × cos(48°) ≈ 7.68

Work done by the motion of the block, W ≈ 7.68 × d

The work done = The kinetic energy of the block, which gives;

\(\mathbf{\dfrac{1}{2} \times k \cdot x^2 }= 7.68 \cdot d\)

The initial kinetic energy in the spring is found as follows;

K.E. = 0.5 × 1000 N/m × (0.1 m)² = 5 J

The initial velocity of the block is therefore;

5 = 0.5·m·v²

v₁ = √(2 × 5 ÷ 3) ≈ 1.83

Work done by the motion of the block, W ≈ 7.68 N × 0.07 m ≈ 0.5376 J

Chane in kinetic energy, ΔK.E. = Work done

ΔK.E. = 0.5 × 3 × (v₁² - v₂²)

Which gives;

ΔK.E. = 0.5 × 3 × (1.83² - v₂²) = 0.5376

Which gives;

The height at which the block will stop moving, h, is given as follows;

\(At \ the \ maximum \ height, \ h, \ we \ have ; \ \dfrac{1}{2} \times 1000 \times 0.1^2 = 7.68 \times x\)

Which gives;

\(Length \ of \ the \ incline \ at \ maximum \ height, \ x_{max} =\dfrac{ 7.68 }{ \dfrac{1}{2} \times 1000 \times 0.1^2 } \approx 1.536\)

The distance up the inclined, the block rises, at maximum height is therefore;

\(x_{max}\) ≈ 1.536 m

Therefore;

h = 1.536 × sin(48°) ≈ 1.1415

From the above solution for the height, the length of the incline is he

distance along the incline at maximum height which is therefore;

Learn more about conservation of energy here:

https://brainly.com/question/7538238

Answer:

earth is 4.54 billion years old

for an organism to survive they would have to change ( mutate )

A mutation is any permenant change in dna of a gene or chromosome

some mutations are bad and some can be good

Explanation:

Answer:

Refractive index = 2

Explanation:

By the law of refraction \(n = \frac{c}{v}\):

where n is the refractive index

c is the speed of light

v is the speed of light in a certain material

We know that the speed of light c is 3*10^8 m/s

\(n = \frac{3e8}{3e8*0.5} = 2\)

The efficiency of the engine is 35.7%.

Calculate the efficiency of a heat engine, we'll use the following formula:

Efficiency = (Work done by the engine / Heat absorbed) × 100

First, we need to find the work done by the engine. Work done can be calculated using the following equation:

Work done = Heat absorbed - Heat expelled

Now, let's plug in the values given in the question:

Work done = 350 J (absorbed) - 225 J (expelled) = 125 J

Next, we'll calculate the efficiency using the formula mentioned earlier:

Efficiency = (125 J / 350 J) × 100 = 35.7 %

So, 35.7% is the efficiency of the engine.

For more questions on efficiency:

https://brainly.com/question/30276416

#SPJ11

The efficiency of the engine is 35.7%.

Calculate the efficiency of a heat engine, we'll use the following formula:

Efficiency = (Work done by the engine / Heat absorbed) × 100

First, we need to find the work done by the engine. Work done can be calculated using the following equation:

Work done = Heat absorbed - Heat expelled

Now, let's plug in the values given in the question:

Work done = 350 J (absorbed) - 225 J (expelled) = 125 J

Next, we'll calculate the efficiency using the formula mentioned earlier:

Efficiency = (125 J / 350 J) × 100 = 35.7 %

So, 35.7% is the efficiency of the engine.

Visit to know more about Efficiency:-

brainly.com/question/30276416

#SPJ11

Answer:

To find the average power of the engine during the acceleration, we can use the formula:

Power = Work / Time

The work done on the car is equal to the change in kinetic energy. The change in kinetic energy can be calculated using the formula:

ΔKE = (1/2) * m * (v_f^2 - v_i^2)

where:

m = mass of the car = 2500 kg

v_i = initial velocity = 0 m/s (since the car starts from rest)

v_f = final velocity = 10 m/s

ΔKE = (1/2) * 2500 kg * (10 m/s)^2

ΔKE = 125,000 J

Now, we can substitute the values into the power formula:

Power = ΔKE / Time = 125,000 J / 5.0 s

Power = 25,000 Watts