Prior knowledge question (do this before using the gizmo. )a boy rolls an old car tire down a hill. it goes pretty fast, but he wants the tire to go even faster. so, the boy climbs inside and rolls down the hill inside the tire. assuming there are no crashes, how do you think the speed of the tire with the boy inside will compare to the speed of the empty tire

Answer:

The answer should be True, but it's False on Edge 2021

Explanation:

이것이 도움이 되었기를 바랍니다.

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Answer:

The amount of friction depends on the force pushing the surfaces together. If this force increases, the hills and valleys of the surfaces can come into closer contact. The close contact increases the friction between the surfaces. Objects that weigh less exert less downward force than objects that weigh more.

Explanation:

Friction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth.

answer

64 is C (c) 1-Bromo-3-methylbutane

63 is D

i is secondary ii is primary

The temperature can rise 234° C in each of the four 3.5 kg steel brake disks.

Energy cannot be created or destroyed, according to the law of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present.

According to law of conservation of energy:

1/2 × 1600 × 42.8² = 4 × 3.5 × 448 × Δt

Δt = (1600 × 42.8² )/( 2 ×  4 × 3.5 × 448)

Δt = 234° C.

Hence, the temperature can  rise 234° C in each of the steel brake disks.

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The velocity of the car is equal to 20 m/s.

Given the following data:

Scientific data:

To determine the velocity of the car:

First of all, we would calculate the mass of the car by using this formula:

\(Weight = mg\\\\40000=m \times 10\\\\m=\frac{40000}{10}\)

Mass, m = 4,000 kg.

For the velocity:

Mathematically, momentum is giving by this formula;

\(Momentum = mass \times velocity\)

Making velocity the subject of formula, we have:

\(Velocity = \frac{Momentum}{Mass}\)

Substituting the given parameters into the formula, we have;

\(Velocity = \frac{80000}{4000}\)

Velocity = 20 m/s.

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Distance = 10 miles

Displacement = zero

The coach must be fired and disciplined.

Answer:

what

Explanation:

Answer:

El periodo del péndulo simple, para oscilaciones de poca amplitud, viene determinado por la longitud del mismo y la gravedad.

Explanation:

No influye la masa del cuerpo que oscila ni la amplitud de la oscilación. Donde: T: Periodo del péndulo.

Sorry your tired, ill try to make it worth reading.

One day I walked outside, I looked around. THEN BAM a wasp lands right on my face. Its hideously sharp stinger impaled my flesh. I could almost hear it going deeper and deeper. I screamed and ran around in circles until it finely flew away. As I started walking to the door I could feel my heart pules where the thing had stung. I opened the door and went into the bathroom. Right in the middle of my face just above my nose was a red dot, with a slightly less red ring around it, like an ateroid impact. I sat down and went over the entire event five times. I decided to go back outside, as I walked around the corner, another wasp landed on me.

According to the question the speed of pulse is = 0.33m/s

Velocity is the pace and direction of either an object's movement, whereas speed is now the time rate which an object is travelling along a path. In other words, velocity is a vector, whereas speed would be a scalar value. If you determine how far an object travels in a certain amount of time, you can calculate its speed.For instance, an automobile is moving at a pace of 70 miles per hour if it covers 70 miles in an hour .

The equation for speed can be obtained by simply dividing time by distance.

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Answer:

5000 W

Explanation:

Applying,

P = W/t................. Equation 1

Where P = Power, W = work done by the car, t = time.

But,

W = F×d ............. Equation 2

Where F = Force, d = distance

Substitute equation 2 into equation 1

P = (F×d)/t.............. Equation 3

From the question,

Given: F = 2000 N, d = 50 m, t = 20 seconds.

Substitute these values into equation 3

P = (2000×50)/20

P = 5000 W

Answer :A testable prediction is also known as a hypothesis.

Explanation: I think

A testable prediction is a hypothesis. (a)

We can see here that the cash that Stowe-Arts Holdings Co. would get from the customer is $171,500. C. $171,500.

A customer is an individual, organization, or entity that purchases goods, services, or products from a business or supplier. Customers are the key stakeholders in business transactions and play a crucial role in driving economic activity.

To calculate the cash received by Stowe-Arts Holding Co., we can subtract the discount from the total amount owed.

Total amount owed: $175,000

Discount: 2% of $175,000 = $3,500

Cash received = Total amount owed - Discount

Cash received = $175,000 - $3,500

Cash received = $171,500

Therefore, the cash that Stowe-Arts Holdings Co. would get from the customer is $171,500.

Thus, the correct answer is C. $171,500.

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The complete question is:

Stowe-Arts Holdings Co. has a very attractive credit policy, and none of its customers pays in cash when the firm makes a sale. Stowe-Arts Holdings Co. sells to its customers on credit terms of 2/10, net 30.

If a customer bought $175,000 worth of goods and paid the firm cash eight days after the sale, how much cash would Stowe-Arts Holdings Co. get from the customer?

A. $183,750

B. $157,500

C. $171,500

D. $140,000

Answer:

\(\boxed {\boxed {\sf a\approx 16.79 \ m/s^2}}\)

Explanation:

Acceleration can be found by dividing the net force by the mass.

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

The net force is 68 Newtons. Let's change the units to make later steps simpler.

1 Newton is equal to 1 kg*m/s², so the net force of 68.0 Newtons is also equal to 68.0 kg*m/s².

The mass is 4.05 kilograms.

\(F=68.0 \ kg*m/s^2 \\m=4.05 \ kg\)

Substitute the values into the formula.

\(a=\frac{68.0 \ kg* m/s^2}{4.05 \ kg}\)

Divide. Note that the kilograms (kg) will cancel each other out when dividing.

\(a=\frac{68.0 \ m/s^2}{4.05 }\)

\(a=16.7901235 \ m/s^2\)

Let's round to the nearest hundredth. The 0 in the thousandth place tells to leave the 9 in the hundredth place.

\(a\approx 16.79 \ m/s^2\)

The acceleration is about 16.79 meters per square second.

The velocity of the train after 30 seconds is calculated as  30.5 m/s.

Velocity is vector quantity that explains the rate at which any object changes the position.

Initial velocity = 20 km/hr = (20 km/hr) x (1000 m/km) / (3600 s/hr) = 5.56 m/s

Acceleration = 3.0 km/hr/s = (3.0 km/hr/s) x (1000 m/km) / (3600 s/hr) = 0.83 m/s²

As v = u + at

v is final velocity, u is initial velocity, a is acceleration , t is time

v = 5.56 m/s + (0.83 m/s²) x 30 s

v = 5.56 m/s + 24.9 m/s

v = 30.5 m/s

Therefore, the velocity of the train after 30 seconds is 30.5 m/s.

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Answer:

ADE

Explanation:

Answer:

-A mover carries a box up a flight of stairs.

-Wind blows a pool chair across the yard.

-A weightlifter lifts a barbell off the ground.

Explanation:

TRUSTTTT A HOOOEEEE

Answer: the weight of the box is 980N

Explanation:

The weight an object has is defined as  the force of gravity acting  on that object which is given as

w =m x g

Since weight is defined as a force, it can also be written as

w=mg

= F= mg

where m= mass of the object in kg given as 100Kg

an g is the gravitational acceleration in  m/s^2 =  g is 9.8 m/s2

F= mg

F = 100 kg x 9.8 m/s2

F== 980Kgm/s^2 = 980N

Therefore the weight of the box is 980N

The horizontal velocity of the projectile it leaves the launcher is 0.283 m/s.

The horizontal speed of a projectile is regular, and there's a vertical acceleration because of gravity; its cost is 9.8 m/s/s, down, The vertical speed of a projectile changes via nine.8 m/s every second, The horizontal motion of a projectile is impartial to its vertical movement.

Projectile motion is a form of motion experienced with the aid of an object or particle that is projected in a gravitational field, such as from Earth's floor, and movements alongside a curved route below the action of gravity best.

Projectile motion is the movement of an object thrown (projected) into the air. After the initial force that launches the item, it most effectively reports the pressure of gravity. The object is known as a projectile, and its route is called its trajectory.

Calculation:-

Horizontal distance = 40 cm

                          = 0.4 m

height of table = 10 m

Let vertical velocity is 0.

S = ut +1/2 at²

10 = 0 + 0.5 × 10 t²

t² = 10/5

t    = 1.414 sec.

At the same time, it will take to cover a horizontal distance of 0.4 m.

Velocity = distance/time

                = 0.4/1,414

                  = 0.283 m/s

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We can use the formula for potential energy stored in a spring to solve this problem:

U = 1/2 k x^2

where U is the potential energy, k is the spring constant, and x is the displacement from the natural length of the spring.

To find the spring constant, we can use the given information that it requires 405 J of work to stretch the spring from 1 m to 10 m:

405 = 1/2 k (10-1)^2

405 = 1/2 k (81)

k = 10

Now we can use this value of k to find the work required to stretch the spring from 3 m to 8 m:

W = U2 - U1 = 1/2 k x2^2 - 1/2 k x1^2

W = 1/2 (10) (8^2 - 3^2)

W = 1/2 (10) (55)

W = 275 J

Therefore, the work required to stretch the spring from 3 m to 8 m is 275 Joules.

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It also assumes that many of your portrait are in focus. A wide aperture setup admits so much light into to the lens and lessens the depth of field.

A cameras is a piece of equipment that takes pictures and comprises of either a plate or light-sensitive film inside of a light-proof casing. The camera's shutters opens and closes during the taking of a picture, exposed the photosensitive film to sight and recording the scene on the film.

The traditional camera depicted in the illustration has been largely replaced by digital cameras and mobile phones today.

Less light enters the lens through a tiny aperture. Additionally, it suggests that more your photo will be sharp. More light enters the lens when the aperture is wide open, but the field of view is also reduced. You can change the aperture setting to help balance overall exposure and control the amount of the composition is already in focus.

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Answer:the basic building block of chemistry

an atom

The total linear momentum of the antelope and the tiger is 2650 Kg m/s.

The result of a system's mass x its velocity is its linear momentum. Linear momentum is denoted by the sign p = m v. The relationship between momentum and an object's mass and speed is straightforward.

Given -

mass of antelope = 55 Kg

mass of tiger = 140 Kg

speed of antelope = 10 m/s

speed of tiger = 15 m/s

from linear momentum formula

P = m × v

For antelope-

P = 55 × 10

P = 550 Kg m/s

For tiger-

P = m × v

P = 140 × 15

P = 2100 Kg m/s

Hence, total momentum is-

550 + 2100

2650 Kg m/s

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Answer:  If you move a magnet quickly through a coil of copper wire, the electrons will move - this produces electricity.

Explanation:

It would take a student running at an average of 6 m/s approximately 13 minutes and 20 seconds to cover a distance of 5km.

o calculate the time it would take for the student to cover the distance of 5km, we can use the formula: time = distance / speed. Substituting the values, we get: time = 5000m / 6m/s = 833.33 seconds. To convert this into minutes and seconds, we divide by 60 to get the number of minutes and take the remainder as seconds. So, 833.33 seconds is approximately equal to 13 minutes and 20 seconds. Therefore, the student would take around 13 minutes and 20 seconds to cover a distance of 5km at an average speed of 6 m/s.

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Actinopterygii and Sarcopterygyii are both groups of fish that have evolved many diverse morphological adaptations.

The Actinopterygii are characterized by the presence of rayed fins, while the Sarcopterygyii have fleshy fins and a well-developed lobe-like structure. The major features that distinguish the Actinopterygii from the Sarcopterygyii are their fins and the structure of their skeletons. The Actinopterygii have fins with bony spines and rays, while the Sarcopterygyii have fins with fleshy, muscular lobes that are supported by a well-developed internal skeleton.

The latter group is a more likely candidate for the origin of tetrapods for several reasons.

First, the Sarcopterygyii have a more complex and robust skeleton than the Actinopterygii, which is necessary for supporting the weight of a tetrapod body. Second, the fleshy fins of the Sarcopterygyii are more similar to the limbs of tetrapods than the rayed fins of the Actinopterygii.

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As the electrons are added, the 4s sublevel fills before the 3d sublevel begins to fill, because, according to Aufbau principle, 4s orbitals have lower energy than 3d orbitals.

In order for an atom to exist in its ground state, the Aufbau principle specifies how electrons must be arranged in its atomic orbitals. It says that electrons are inserted into atomic orbitals in ascending sequence of orbital energy level.

Therefore, according to the Aufbau principle, the electrons enter lower energy orbitals first. The energy level of the 4s orbital is lower than the 3d orbital. Due of this, electrons fill 3p but do not enter 3d after entering 4s.

However, electrons in the outermost orbital are lost during ionisation. Electrons from orbital 4s will be ionised first because it is the outermost orbital in this case.

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Answer: D

Explanation: The chemical bonds in the food store energy that is released when we eat it.

A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced upwards and downwards. In this case, the particles of the medium move perpendicular to the direction that the pulse moves. This type of wave is a transverse wave. Transverse waves are always characterized by particle motion being perpendicular to wave motion.

A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil left and right. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced leftwards and rightwards. In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.

Answer:

The average speed of the cyclist is 17.14 km/hr

Explanation:

Given;

total distance traveled by the cyclist's, d = 60 km

time taken by the cyclist, t = 3.5 hours

The average speed of the cyclist is given by;

average speed  = total distance traveled / total time taken

average speed = 60 km / 3.5 hr

average speed  = 17.14 km/hr

Therefore, the average speed of the cyclist is 17.14 km/hr