A ball is launched upward at an angle from the ground. Which way does its velocity point at the top?
A. Vertical
B. It isn't moving
C. Horizontal
D. Horizontal and Vertical

Answer:

Acceleration.

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

\(Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}\)

\(a = \frac{v - u}{t}\)

Where,

a is acceleration measured in \(ms^{-2}\)

v and u is final and initial velocity respectively, measured in \(ms^{-1}\)

t is time measured in seconds.

The S.I unit for measuring acceleration is meters per seconds square (m/s²).

Hence, 10 m/s^2 is an example of acceleration.

Answer:

Assuming they're unit vectors (length of 1)

You simply add them together.

The vector pointing right can be described with X and Y

(1, 0).

The vector pointing down

(0, -1).

The numbers are taken from the axis in X and Y directions.

If you add them together you get a final vector.

(1, - 1)

This gives you -45° pointing South East.

Or 360°-45°=315°

Answer:

-4500 N

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The police officer must be angry 0_0

If the displacement of a person from their desk is 25.92 m if 27 m, 17° S of W, they are west from desk.

Resolving the 27 m distance into its horizontal and vertical components. The horizontal component will describe how far west they are and the vertical component will describe how far south they are. After resolving the components make a right angled triangle.

cos θ = Adjacent side / Hypotenuse

θ = 17°

Adjacent side = Horizontal component

Hypotenuse = 27 m

cos 17° = West distance / 27

West distance = 0.96 * 27

West distance = 25.92 m

In a right angled triangle some of the ratios similar to the one used above can be used. These ratios are called as trigonometric ratios. These ratios use trigonometric functions and relate them to sides of a right angled triangle.

Therefore, they are 25.92 m west from the desk.

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Answer:

I think it is true I'm not saying it is but if you get another person who says its true say true

Explanation:

During compression or tension testing, a line perpendicular to the normal force may change in length depending on the amount of force applied.

When a force is applied to an object, it can cause compression or tension in the object, which may result in changes to the length of a line perpendicular to the normal force.

In the case of compression, the force applied to the object causes it to become shorter, which may result in the line perpendicular to the normal force becoming shorter as well.

This is because the compression force causes the molecules in the object to move closer together, which can reduce the length of the line.

In the case of tension, the force applied to the object causes it to become longer, which may result in the line perpendicular to the normal force becoming longer as well.

This is because the tension force causes the molecules in the object to move further apart, which can increase the length of the line.

Overall, the changes to a line perpendicular to the normal force during compression or tension testing depend on the amount of force applied and the properties of the object being tested.

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Answer:

133.33 mm

Explanation:

First we need to find the volume of the sphere. The volume of a sphere is given by:

V = (4/3) * pi * r^3

With a radius of 10 cm, we have:

V = (4/3) * pi * r^3 = 4188.79 cm3

The sphere will be moulded into a cylinder, so the volume will be the same. The volume of a cylinder is:

V = pi * r^2 * h

Where h is the height of the cylinder, and for this case, it will be the length.

The radius is the same old radius, so we have:

4188.79 = pi * 10^2 * h

h = 4188.79 / 100pi = 13.3333 cm

In millimeters, we have h = 133.33 mm

Answer:

helium, hydrogen, nitrogen, oxygen,iron,uranium,

Explanation:

there are 118 elements but here are some

The portion of the universe that has been selected for analysis is called a sample. In statistics and research, a sample refers to a subset of individuals, objects, or events that are selected from a larger population or universe for the purpose of study or analysis. The sample is chosen to represent the characteristics and variability of the entire population.

The process of selecting a sample involves careful consideration of sampling techniques to ensure that it is representative and unbiased. By studying the selected sample, researchers can make inferences and draw conclusions about the larger population.

In contrast, a frame refers to a list or source from which a sample is drawn, typically containing the elements of the population. Parameters are characteristics or properties of the population, while statistics are measurements or summaries obtained from analyzing the sample.

Therefore, the correct answer is A. sample.

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Therefore, the magnitude of the force per meter of length on the wire is 7.04 N/m.

The magnitude of the force per meter of length on a straight wire carrying an 8.80 A current when perpendicular to a 0.80 T uniform magnetic field can be calculated using the formula:

F = BIL

Where:
F is the force per meter of length,
B is the magnetic field strength,
I is the current, and
L is the length of the wire.

In this case, the current is 8.80 A and the magnetic field is 0.80 T. We need to calculate the force per meter of length.

Substituting the given values into the formula, we have:

F = (0.80 T) * (8.80 A) * L

Simplifying the expression, we get:

F = 7.04 L N/m

Therefore, the magnitude of the force per meter of length on the wire is 7.04 N/m.

To better understand this, let's consider an example. Imagine you have a wire that is 1 meter long. When a current of 8.80 A flows through the wire perpendicular to a magnetic field of 0.80 T, the force per meter of length on the wire will be 7.04 N/m.

This means that for every meter of wire, there will be a force of 7.04 Newtons acting on it due to the interaction between the current and the magnetic field.

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Answer:

Positive work

Explanation:

When work and the exerted force are in the same direction, then the work done is positive.

In the question, we understand that Marvin lifts a box up (i.e. over his head). The force to lift the box acts in the upward direction and the work done itself is also in the upward direction (from the floor to Marvin's head).

Since these two are in the same direction, then we can conclude that the work done is positive.

Answer:

Longitudinal waves

Explanation:

With sound waves, the energy travels along in the same direction as the particles vibrate. This type of wave is known as a longitudinal wave , so named because the energy travels along the direction of vibration of the particles.

Answer:

If the centripetal force acting on an object in uniform circular motion is removed, the object will continue moving in a straight line with constant speed.

In uniform circular motion, the centripetal force is responsible for keeping the object moving in a circular path. If this force is removed, there is no longer a force acting towards the center of the circle to change the object's direction, and the object will move in a straight line with a constant speed tangent to its previous circular path.

Option c. "continue moving in a straight line with constant speed" is therefore the correct answer.

The magnitude of the centripetal acceleration of the car is 0.0314 m/s².

centripetal acceleration

Centripetal acceleration is described because the assets of the motion of an item, traversing a circular path. Any object that is shifting in a circle and has an acceleration vector pointed in the direction of the center of that circle is referred to as Centripetal acceleration.

a = v²/ r

r = 3500 m (SI unit)

t = 200 s

circumference = C

C = 2 * π * r

C = 2 * 3.141 * (3500 m)

C = 21987 m

v = D / t

v = (21987 m) / (200 s)

v = 109.935 m/s

a = (109.935 m/s)² / (3500 m)

a = (109.935 m/s²) / (3500 m)

a = 0.0314 m/s²

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Answer:

A and d

Explanation:

Answer:

answer in picture

Explanation:

Holding hands while falling would not provide any significant support or protection. The force and momentum generated during the fall could potentially put excessive strain on both individuals, making it difficult to maintain a secure grip.

While the idea of holding hands while jumping off a cliff might seem comforting or supportive, it is not a safe or advisable action. Jumping off a cliff is a dangerous activity that can have severe consequences, and it is important to prioritize safety in such situations.

Holding hands while falling would not provide any significant support or protection. The force and momentum generated during the fall could potentially put excessive strain on both individuals, making it difficult to maintain a secure grip. Moreover, attempting to hold hands may interfere with the ability to properly control body position and react to the environment during the descent.

When it comes to activities like cliff jumping or any potentially risky situations, it is essential to prioritize individual safety by following proper safety guidelines, wearing the appropriate gear, and seeking professional guidance if necessary. It's always better to focus on personal safety and take precautions rather than engaging in actions that may increase the risk or danger involved.

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The incorrect option about the student's claim is option B which is his

claim about alternating current being correct.

This is the type of electron flow which involves a periodic reversal in

direction and changes in magnitude in the circuit.

In a circiuit electrons from the negative terminal to the positive one and

his claim mis correct about direct current which makes his claim wrong.

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Answer:

410 nanometers

Violet light is electromagnetic radiation with wavelengths of 410 nanometers and red light has a wavelength of 680 nanometers. The nanometer is a unit of distance in the metric scale and is abbreviated as nm. One nanometer (nm) equals one thousand millionths of a meter (m) or 1 nm = 10-9 m.

Explanation:

Hope it helps! Correct me if I am wrong :>

Answer:

Using my searching skills, I have came to the conclusion that the most energetic violet light wavelength is 380nm.

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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(a) The distance travelled by the object is  100 m.

(b) The displacement of the object in time interval between t = 0 s and t = 10 s is 60 m.

(a) The distance travelled by the object is calculated from the total area of the curve.

total distance = area of triangle 1 + area of triangle 2 + area of rectangle.

total distance = (¹/₂ x base x height)₁ +  (¹/₂ x base x height)₂ + length x width

total distance = (¹/₂ x 6 s x 20 m/s) +  (¹/₂ (8 - 6) 20) + (10 - 0)(10 - 8)

total distance =  60 m + 20 m + 20 m

total distance = 100 m

(b) The displacement of the object in time interval between t = 0 s and t = 10 s is calculated as follows;

displacement = final position - initial position

displacement =  (¹/₂ x base x height)₁ +  (¹/₂ x base x height)₂ + length x width

displacement = (¹/₂ x 6 s x 20 m/s) +  (¹/₂ (8 - 6) (-20)) + (10 - 0)(10 - 8)

displacement = 60 m - 20 m + 20 m = 60 m

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The electric power can be determined if any two of the three are given namely voltage, current or resistance.

The same formula will be used for the maximum value, but the amplitude will be used in place of the rms value. 2755.98 Watts is the highest possible value for the instantaneous power.

Alternating Current, sometimes known as AC in its acronym form, is a category of current that frequently reverses direction. A full positive cycle and a full negative cycle, repeated at the waveform's frequency, make up an entire AC cycle. Due to the necessity of transformers, it is a useful sort of waveform. AC usage

The lower case letter p is used to represent the instantaneous power in an AC circuit, which is defined as the sum of the instantaneous voltage (v) across the element and the instantaneous current I flowing through the element. Power Instantaneous, p=vi

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Its magnetic axis does not lie in the same direction as its rotation axis. Uranus is the seventh planet from the Sun and the third largest planet in our solar system. Option e is Correct.

It is unique in several ways that distinguish it from every other planet in our solar system. One of these characteristics is that its magnetic axis is tilted almost 90 degrees to the plane of its orbit. The magnetic axis of a planet is the direction in which its magnetic field is pointed. The magnetic axis of a planet is usually aligned with its rotation axis, but this is not the case for Uranus. In fact, Uranus's magnetic axis is tilted by about 59 degrees relative to its orbit, which is much more than any other planet in our solar system.

In contrast, the other characteristics listed in the options are not unique to Uranus. Every planet in our solar system has its own set of moons, and the composition of their atmospheres varies. The orbits of the planets are also tilted with respect to the Sun, and some of them have magnetic fields that are tilted with respect to their rotation axes. However, the tilt of Uranus's magnetic axis is the most extreme of any planet in our solar system.  

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Answer:

aww that's simple! its B can i get brainliest? i really need some points rn <3

Explanation:

Answer:

B

Explanation:

Answer:

Saint Valentine's Day Massacre, (Feb. 14, 1929), mass murder of a group of unarmed bootlegging gang members in Chicago. The bloody incident dramatized the intense rivalry for control of the illegal liquor traffic during the Prohibition Era in the United States.

hope it help u make me brainlist okkkkkkkkkkk.........

Answer:

bchfdfu

hjoufu I'm not sure if you are still interested in the position and would like to know if you are interested

Answer:

8 electrons

Explanation:

Given :

An object with weight 20 N was lifted to 0.5 meters.

To Find :

How high must you lift a 25 Newton book for it to have the same increase in potential energy as the given book.

Solution :

Since both have same potential energy :

\(P.E_2 = P.E_1\\\\W_2h_2 = W_1h_1\)

Putting all given values in above equation :

\(25h_2 = 20\times 0.5\\\\h_2 = \dfrac{20\times 0.5}{25}\\\\h_2 = 0.4\ m\)

Therefore, book with same potential energy is at a height of 0.4 m.

Answer:

C) 350 m/s N

Explanation:

Velocity is measured in miles per hour or metres per second.

Answer:

The car's angular speed is \( \frac{rad}{s}\).

Explanation:

Angular velocity is usually measured with \(\frac{radians}{sec}\), so I'm going to use that to answer your question.

The relationship between tangential velocity and angular velocity (ω)  is given by:

\(V = \omega R\)

Using the values from the question, we get:

\(2 \frac{m}{s} = \omega (0.4m)\)

\(\omega = 5 \frac{rad}{s}\)

Therefore, the car's angular speed is \(5 \frac{rad}{s}\).

Hope this helped!

Answer:

....

Explanation:

Answer:

What do you mean.

Explanation: