a car is driving down the road at 20.0 m/s when the driver sees a stop sign 15.0 m ahead. the car slows down at a uniform rate and stops exactly at the stop sign. a) what is the car's acceleration? b) how much time does is take the car to stop? remember to draw a picture of the situation.

Answer:

if you mean the regions during slavery, North, but if in general, East. (think East Coast)

The exact same.  gravity has no effect on mass.

Answer:

Explanation:

Answer:

The mineral's hardness is greater than 4 but less than 5.5 on the Mohs hardness scale.

48 m/s in terms of km/h is 720.8 km/h. In terms of m/min is 2880 m/min, in terms of km/s is 0.048 km/s and in terms of km/min is 2.88 km/min.

To solve this question, we need to understand some terms. The unit of velocity is measured in m/s. It can be expressed in different units of velocity.

1 km (kilometer) = 1000 meter

1 h (hour) = 3600 seconds

1 minutes = 60 seconds

To convert m/s into km/h,

48 m/s * 3600/1000 =  172.8 km/h

To convert m/s into m/min,

48 m/s * 60 = 2880 m/min

To convert m/s into km/s,

48 m/s ÷ 1000 = 0.048 km/s

To convert m/s into km/minutes,

48 m/s * 60 / 1000 = 2.88 km/min

Therefore, the 48 m/s expressed is 172.8 km/h, 2880 m/min, 0.048 km/s and 2.88 km/min.

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48 m/s is equivalent to  172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.

To express 48 m/s in different units of velocity:

km/h (kilometers per hour):

To convert m/s to km/h, we can use the conversion factor of 3.6 since 1 m/s is equal to 3.6 km/h.

48 m/s * (3.6 km/h / 1 m/s) = 172.8 km/h

Therefore, 48 m/s is equivalent to 172.8 km/h.

m/min (meters per minute):

To convert m/s to m/min, we can use the conversion factor of 60 since there are 60 seconds in a minute.

48 m/s * (60 m/min / 1 s) = 2880 m/min

Therefore, 48 m/s is equivalent to 2880 m/min.

km/s (kilometers per second):

Since 1 kilometer is equal to 1000 meters, to convert m/s to km/s, we divide the value by 1000.

48 m/s / 1000 = 0.048 km/s

Therefore, 48 m/s is equivalent to 0.048 km/s.

km/minute (kilometers per minute):

To convert m/s to km/minute, we first need to convert m/s to km/s (as calculated in the previous step) and then multiply by 60 to convert seconds to minutes.

0.048 km/s * 60 = 2.88 km/minute

So, 48 m/s is equivalent to 2.88 km/minute.

Hence, 48 m/s is equivalent to approximately 172.8 km/h, 2880 m/min, 0.048 km/s, and 2.88 km/minute.

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Answer:

the elephant encounters a smaller fourth air resistance than the feather so it would fall faster.

Explanation:

his elephant has a greater acceleration of gravity and the feather and so that makes it fall faster.

Answer:  Orbital resonance

Explanation: An interesting consequence of such iterations is something called orbital resonance; after long periods of time - and remember that the current estimate for our planet's existence is 4.54 billion years - the ebb and flow of tiny gravitational pulls cause nearby celestial bodies to develop an interlocked behavior.

1) Length: 44 blocks

2) Relocation: 10.2 blocks to the north of the east

Since each segment travelled a certain amount of distance, the total distance is:

distance equals 18 + 10 + 16 blocks.

The total distance travelled is larger than the displacement between those two places if an item changes direction while travelling.

The displacement is only the difference between the locations of the two markers and is unrelated to the route used to get there. The entire length of the path between the two markings, however, is the distance travelled.

The distance is always greater than the object's displacement and can never be 0 or negative.

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Answer:

b & c

Explanation:

because is my choice

a. The waveform is sketched in the form of nodes and antinodes.

b. The wavelength of the first harmonic in the open pipe is 83.2 cm.

The waveform of the first harmonic of an open pipe has a single antinode in the middle and nodes at both ends, as shown below,

-----O-----O-----

The O's represent the antinode in the middle and the dashes represent the nodes at both ends.

The wavelength of the first harmonic in an open pipe is twice the length of the pipe, or, λ = 2L, where λ is the wavelength and L is the length of the pipe. Substituting the given length of the pipe, we get:

λ = 2(41.6 cm) = 83.2 cm.

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Answer:

because the earth is more consistent and while you use a slinky your hand moving it is not very controlled

Answer:

6 newtons

Explanation:

If it's an equal force exerted on the student's hands, the object will not move.

If a student pushes on an object with a force of 6 newtons and the object does not move then the force exerted by the object on the student’s hands would be 6 Newtons because the applied force is equal to the static frictional force until the object does not move.

Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact

As given in the problem If a student pushes on an object with a force of 6 newtons and the object does not move then we have to find out the force exerted by the object on the student’s hands,

Force applied by the student of the object = 6 Newtons

The force exerted by the object on the student's hand = 6 Newtons

Thus, the force exerted by the object on the student’s hands would be 6 Newtons

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Answer:

I can help with the last question.

Explanation:

The force from the ball on the left ball will hit the ball next to it, bringing the force all the way to the right ball, and vice versa. Have a great day!

Answer:

gravity is pulls objects to the center of the earth.

friction is slows or stops motion when objects rub together.

magnetism is pushes or pulls objects containing iron or other metals.

The correct option is A.

The statement that will correct the error in Edwin's notes is as follows:

An electrically charged object needs to touch an uncharged object before they attract or repel.

How do electrically charged objects produce attraction?

The electrically charged objects produce attraction of oppositely charged objects. For example, if a positively charged object and a negatively charged object bring close to each other, they interact with one another. Their forces act in the same direction. i.e. from the positive to the negative charge.

There is an interaction between two oppositely charged objects required in order to furnish attraction, while there is an interaction between two identical charged objects required in order to furnish repulsion.

Therefore, whether it is attraction or repulsion, it must be required that an electrically charged object needs to touch an un-charged object.

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[NOTE: THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS:

What happens when an uncharged object is placed close to a charged object, the objects can attract or repel each other. When two electrically charged objects is placed closed to another object that is uncharged?

A) An electrically charged object needs to touch an uncharged object before they attract or repel.

B) When an electrically charged object comes close to an uncharged object, it will attract it.

C) If an electrically charged object is near an uncharged object, it will repel it.

D) When two electrically charged objects are placed close together, they only attract.]

Answer:

1 35°

2 20°

3 50°

..............

a. The height above Earth's surface can be determined using the formula for the orbital radius of a satellite in circular orbit.

b. The satellite's acceleration can be calculated using the centripetal acceleration formula.

a. To find the height above Earth's surface, we can use the formula for the orbital radius of a satellite in circular orbit. The time period of one revolution is given as 5.98 hours. By converting this to seconds, we can use the formula T = 2π√(R³/GM) to solve for the orbital radius R. Once we have the orbital radius, we can subtract the radius of Earth to find the height above Earth's surface.

b. The satellite's acceleration can be determined using the centripetal acceleration formula, which is given by a = v²/R, where v is the orbital velocity and R is the orbital radius. The orbital velocity can be found by dividing the circumference of the satellite's orbit by the time period of one revolution. Once we have the orbital velocity, we can calculate the acceleration using the formula mentioned earlier.

It's important to note that these calculations assume a circular orbit and neglect other factors such as atmospheric drag and the Earth's non-uniform gravitational field. These simplifications allow us to approximate the satellite's height and acceleration based on the given information.

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The 0.64 amp current flow  is in a resistor of 227 Ω if the potential difference across the resistor is 145 V.

The sum of the currents flowing through each branch represents the total current in the circuit. By dividing the total current for the circuit by the cell's potential difference, the total resistance for this circuit may be computed.

Using the equation V = E d, determine the potential difference between the two locations. Subtract the current flow rate from the resistance that exists in the circuit. The process of multiplication results in the potential difference, which is measured in volts. This formula, V = I R, is known as Ohm's Law.

The current times the resistance results in the potential difference, also known as voltage. One Joule of energy is produced when one Coulomb of charge moves between two points in a circuit with a potential difference of one Volt.

From ohm's law;

V = IR

Substitute values,

145 = I × 227

I = 0.64 Amp

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Answer:since time goes to the right you look at the lines that are most pointed to the right with less distance so that would be B, A, D, C

Explanation:

The index of refraction of the plastic is  1.36.

The index of refraction (n) of a medium is defined as the ratio of the speed of light in a vacuum (c) to the speed of light in the medium (v):

n = c/v

In this problem, the speed of light in the plastic (v) is given as 2.199 x \(10^8\)m/s. The speed of light in a vacuum (c) is a constant and is equal to 3 x \(10^8 m/s.\)

Plugging these values into the formula for index of refraction, we get:

n = c/v = (3 x \(10^8 m/s\)) / (2.199 x \(10^8 m/s\)) ≈ 1.36

Therefore, the index of refraction of the plastic is approximately 1.36.

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The given statement "If an object moves at constant velocity, it must also be moving at constant speed" is true.

The given statement "If you know the distance traveled and the time taken, you can determine both the speed and velocity of an object" is false.

The reason for this is that velocity is a vector quantity that describes both the speed and direction of motion. So, if an object is moving at a constant velocity, it means that its speed is not changing, and it is also moving in a straight line at a constant rate.

If an object moves with constant speed, it does not necessarily mean that it is moving at constant velocity because velocity also includes direction. For example, if a car is moving in a circular path with constant speed, its velocity is constantly changing because the direction of motion is constantly changing.

Hence, it is possible for an object to move with constant speed but not at a constant velocity. Therefore, the statement that "If you know the distance traveled and the time taken, you can determine both the speed and velocity of an object" is false because distance and time only give us information about speed, not velocity. To determine velocity, we need to know both speed and direction of motion.

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Answer:

780 nm - 1000 µm.

Explanation:

i surched it up

Explanation: Research highlights the individuals with ASDS are nutritionally vulnerable because they exhibit a selective or pick eating pattern and sensory sensitivity that predisposes them to restricted intakes.

I hope this helps!

8000 Joules is the amount of work required to haul up the equipment.

To calculate the work required to haul up the equipment, we need to consider two components: the work done against gravity and the work done against the weight of the rope.

The force due to gravity is given by the weight of the equipment, which is 100 N. The distance over which the force is applied is the height the equipment is being hauled, which is 40 meters. The work done against gravity can be calculated using the formula:

Work = Force × Distance

Work against gravity = 100 N × 40 m = 4000 N·m or 4000 J (Joules)

The weight of the rope can be calculated by multiplying the weight per meter (0.8 N/m) by the length of the rope (40 m):

Weight of the rope = 0.8 N/m × 40 m = 32 N

Since the rope is being hauled up, the work done against the weight of the rope is the same as the work done against gravity. Therefore, the work against the weight of the rope is also 4000 J.

The total work required to haul up the equipment is the sum of the work against gravity and the work against the weight of the rope:

Total work = Work against gravity + Work against rope weight

Total work = 4000 J + 4000 J

Total work = 8000 J

Therefore, it will take 8000 Joules of work to haul up the equipme

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A cyclist going around a circular track at 10.0 m/s^2 has a centripetal acceleration of 5.00 m/s2m/s2 .The radius of the curve is 20.0 meters.

To find the radius of the curve, we can use the formula for centripetal acceleration:

a = (v^2) / r

Where:

a is the centripetal acceleration (given as 5.00 m/s^2)

v is the velocity of the cyclist (given as 10.0 m/s)

r is the radius of the curve (unknown)

Rearranging the formula to solve for r, we have:

r = (v^2) / a

Plugging in the given values:

v = 10.0 m/s

a = 5.00 m/s^2

r = (10.0^2) / 5.00

Calculating the expression:

r = 100 / 5.00

r = 20.0 meters

Therefore, the radius of the curve is 20.0 meters.

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The three characteristics that all the plants most likely share are: have xylem and phloem; lack pollen. Option D.

In seed plants, xylem and phloem are essential vascular tissues responsible for the transport of water, nutrients, and sugars throughout the plant. Xylem transports water and minerals from the roots to the rest of the plant, while phloem carries sugars and other organic compounds from photosynthetic regions to other parts of the plant.

The absence of pollen indicates that these plants do not reproduce through the production and dispersal of pollen grains. Instead, they likely reproduce through other means, such as the production of seeds.

This combination of having xylem and phloem while lacking pollen suggests that the plants in question are likely gymnosperms. Gymnosperms are a group of seed plants that include conifers, cycads, ginkgoes, and others. These plants typically produce seeds that are not enclosed within a fruit, and they rely on other methods such as wind or insects for pollination.

It is important to note that this conclusion is based on the provided information and is subject to change depending on further details about the specific characteristics of the gathered plants. SO Option D is correct.

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Answer:

24.5 m/s

Explanation:

Since the work done by the electric field on the charge equals the kinetic energy of the ball, then

qV = 1/2mv²

and v = √(2qV/m)

where q = charge = + 0.05 C, V = potential difference = 12.0 V, m = mass of ball = 2.0 g = 0.002 kg

Substituting the values into v, we have

v = √(2 × + 0.05 C × 12.0 V/0.002 kg)

= √(1.2 CV/.002 kg)

= √(600 CV/kg)

= 24.5 m/s

Answer:

i think it is c

Explanation:

sorry if im wrong

Answer:

An endothermic reaction is one in which heat is transferred from the surroundings to the reactants.------- true

Answer:

T . Energy is transferred to the reactants

Explanation:

Answer:

On molecules of PH3, there has to be 3 atoms.

Explanation:

The Element Hydrogen (H) has 3 attoms.

The Element Phosphorus (P) has 1 atom.

These two created into the molecule PH3, would have to have only 3 attoms because they are asking how many hydrogens atoms are in the molecule PH3.