A 58 kg counterweight on a trebuchet is raised to a height of 3.1 meters. Calculate how much potential energy it has

Answer:

Phase Diagram I Think But I Just Searched It Online

Answer:

2.38m

Explanation:

Use potential energy

PE= mgh

42= 1.8*9.8*h

solve for h

to get h= 2.38 m

Answer:

D. Malleable

Explanation:

Gold is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple. It is the most malleable and ductile metal; 1 ounce (28 g) of gold can be beaten out to 300 square feet. It is a soft metal and is usually alloyed to give it more strength.

The ball will be 246.12 meters away from the starting point at 12 seconds after it is kicked and the greatest height reached by the ball is approximately 20.81 meters.

A. To find where the ball will be at 12 seconds after it is kicked, we need to first break down the initial velocity into its horizontal and vertical components.

The horizontal component, Vx, can be found using the equation Vx = Vcos(theta), where V is the initial velocity (25 m/s) and theta is the angle of the kick (35 degrees).

Vx = 25 m/s * cos(35)

Vx = 20.51 m/s

The vertical component, Vy, can be found using the equation Vy = Vsin(theta).

Vy = 25 m/s * sin(35)

Vy = 14.26 m/s

We can then use the equation of motion to find the horizontal displacement, dx, after 12 seconds:

dx = Vx * t

dx = 20.51 m/s * 12 s

dx = 246.12 m

Therefore, the ball will be 246.12 meters away from the starting point at 12 seconds after it is kicked.

B. To find the greatest height reached by the ball, we can use the vertical component of the initial velocity, Vy, and the acceleration due to gravity, g, which is approximately 9.8 m/s².

We can use the following kinematic equation:

\(Vy^2 = V0y^2 + 2gh\)

where V0y is the initial vertical velocity (14.26 m/s) and h is the maximum height reached by the ball.

We can rearrange the equation to solve for h:

\(h = (Vy^2 - V0y^2) / 2g\)

\(h = (0 - 14.26^2) / (2 \times -9.8)\)

h = 20.81 m

Therefore, the greatest height reached by the ball is approximately 20.81 meters.

Summary: To find the position of the ball after 12 seconds and its maximum height, we first calculated the horizontal and vertical components of the initial velocity. Using the horizontal component, we calculated the horizontal displacement after 12 seconds.

Using the vertical component and the acceleration due to gravity, we calculated the maximum height reached by the ball. The ball will be 246.12 meters away from the starting point 12 seconds after it is kicked and it will reach a maximum height of approximately 20.81 meters.

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To calculate the density of each ball, we can use the formula D = m/V, where D represents density, m represents mass, and V represents volume.

Let's assume we have two balls, Ball A and Ball B.

For Ball A:

Given mass (m) = 75 grams

Given volume (V) = 50 cubic centimeters

Using the formula D = m/V, we can substitute the values:

Density of Ball A (D_A) = 75 grams / 50 cubic centimeters = 1.5 grams per cubic centimeter

For Ball B:

Given mass (m) = 100 grams

Given volume (V) = 80 cubic centimeters

Using the formula D = m/V, we can substitute the values:

Density of Ball B (D_B) = 100 grams / 80 cubic centimeters = 1.25 grams per cubic centimeter

Therefore, the density of Ball A is 1.5 grams per cubic centimeter, and the density of Ball B is 1.25 grams per cubic centimeter.

Please note that the units for density are typically expressed as mass per unit volume, such as grams per cubic centimeter or kilograms per cubic meter, depending on the system of measurement used.

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Answer:

The fluid friction or drag can be reduced are minimised by giving special shape called streamlined shape to the objects which Move through fluids like air or water

Answer:

ggggggggggggggggggggggggg

Answer:

125

Explanation:

use the formula e=1/2mv² and use m=10 and v=5

this produces the equation e=1/2x10x25=125

dont forget the units (J) ;)

Answer:

125J

Explanation:

K.e=1/2mv^2

=1/2(10)(5)^2

=125J

Answer:

because these units are derived from combinations of two or more of the seven base units

Answer:

The answer to this question is given below in this explanation sections.

Explanation:

The weight of an object is concentrated at the center of gravity.The term center of gravity is used interchangeably with center of mass.For a symmetrical object the center of mass is located  at the geometric  center of the object.If the object is not symmetric we can determined the center of mass using the mentioned below.

Materials:

Procedure:

conclusion:

             What would happen to the center of gravity of the shape if you were to spin it freely?

center of gravity experiment:

Jupiter's volume is more than ten times as large as Saturn's volume. This statement is true. Jupiter is the largest planet in our solar system with a volume of about 1,431,281,810,739 km³ while Saturn is the second-largest planet with a volume of about 827,129,915,150 km³.

Jupiter is approximately 11 times larger than Saturn. The two planets belong to the gas giant category, and they share many similarities such as having a large number of moons. Jupiter is famous for its Great Red Spot and powerful magnetic field, while Saturn is well-known for its stunning ring system. Both planets have been the focus of scientific research and exploration, and they continue to fascinate scientists and stargazers alike. In conclusion, Jupiter's volume is more than ten times as large as Saturn's volume.

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Answer:

D. there is not enough information to tell

Explanation:

I have already read this in grade five

Technically, there is not enough information to tell, because in your picture, you cut off the last word in the question.

If the last word in the question is "acceleration", then "C" is the correct choice.

If some other word is the last one in the question, then it has to be "D".

According to the scientific method, you have to make observations and ask questions before you can form a hypothesis.

The scientific method is a series of steps or procedures which scientists follow in their process of discovery and explanation of the natural world or natural phenomena.

The scientific method consists of the following steps:

In conclusion, observations and questions are important before formulation of hypothesis.

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Yes, adding too many fins on a surface can cause the overall heat transfer coefficient and heat transfer to increase.

This is because the presence of fins can increase the surface area available for heat exchange, allowing more heat to be transferred over a given period of time. Fins can also improve the convective heat transfer coefficient and turbulence levels of the surrounding fluid.
When adding fins to a surface, it is important to consider the fin spacing and height to ensure that the fins do not impede the flow of the surrounding fluid. For instance, if the fins are too close together, they can cause an increase in the pressure drop of the fluid and reduce the efficiency of the heat exchange. Likewise, if the fins are too high, they can block the flow of the fluid.
It is also important to consider the type of material used for the fins. Fin materials can affect the thermal conductivity of the fins, which in turn can influence the heat transfer rate. Furthermore, if the fins are made from a material that is not resistant to corrosion, the effectiveness of the fins may be reduced over time.
In summary, adding too many fins on a surface can cause the overall heat transfer coefficient and heat transfer to increase. It is important to consider the fin spacing, height, and material when determining the most efficient fin configuration for a given surface.

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The rotational inertia of a thin cylindrical shell of mass M, radius R, and length L about its central axis (X - X') is MR²/2.

The rotational inertia, also known as the moment of inertia, is a property that quantifies an object's resistance to rotational motion. For a thin cylindrical shell, the rotational inertia can be calculated based on its mass, radius, and length.

The formula for the rotational inertia of a thin cylindrical shell is given by I = MR²/2, where M represents the mass of the shell and R represents its radius.

In this case, since we are considering the rotational inertia about the central axis (X - X'), the length of the cylinder (L) does not come into play. The only relevant parameters are the mass (M) and radius (R).

Applying the formula, the rotational inertia of the thin cylindrical shell is MR²/2. Therefore, the correct answer is A. MR²/2.

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Answer:

she is going to be mad dude

Answer:

Scalar quantities are physical quantities that have magnitude but no direction, while vector quantities have both magnitude and direction. Scalar quantities can be described by a single value.

A scalar quantity is a measurement that only has magnitude or size. It does not have any specific direction associated with it. Examples of scalar quantities include temperature, mass, volume, and time. For instance, temperature is a scalar quantity because it only tells us the magnitude of the heat energy without any indication of the direction it is flowing in.

Similarly, mass is a scalar quantity as it describes the amount of matter an object possesses, without specifying its direction or orientation. On the other hand, a vector quantity is a measurement that has both magnitude and direction. It requires information about both the size and the specific direction in order to be fully described.

Examples of vector quantities include displacement, velocity, acceleration, and force. For example, displacement is a vector quantity as it not only tells us the magnitude or distance traveled, but also the direction in which the object moved. Similarly, velocity is a vector quantity because it indicates the speed of an object as well as the direction of its motion.

In summary, scalar quantities have only magnitude and no direction, while vector quantities have both magnitude and direction. Scalar quantities can be represented by a single value, whereas vector quantities require both magnitude and direction to be fully expressed.

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From the calculation, the mass of the dummies head is 1647.44 Kg

We know that the momentum after collision is equal to the momentum before collision.

Mass of the headrest = 2005.6 kg

Initial velocity of the head rest = 4.524 m/s

Final velocity of the head rest =  4.487 m/s

Mass of the dummy = m

Initial velocity of the dummy = -1.005 m/s

Final velocity of the dummy = 9.965 m/s

Then;

(m *  -1.005) + (2005.6 * 4.524 ) = (2005.6 *   4.487) + (m * 9.965)

-1.005m + 9073.33 = 8999.13 + 9.965m

9073.33 - 8999.13  = 9.965m + 1.005m

18072.46 = 10.97m

m = 18072.46/ 10.97

m = 1647.44 Kg

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The correct answer is a. buoys.

Buoys are floating devices that are used to measure the height of waves.

They are typically anchored to the seabed, and they have a sensor that measures the height of the waves as they pass by. This information is then transmitted to a central location, where it can be used to track the movement of waves and to predict their behavior. Buoys are an important tool for monitoring the ocean and for predicting the weather. They are also used to warn ships of dangerous conditions at sea. Buoys are floating devices that are used to measure the height of waves. They are typically anchored to the seabed, and they have a sensor that measures the height of the waves as they pass by. This information is then transmitted to a central location, where it can be used to track the movement of waves and to predict their behavior. Buoys are an important part of the global network of ocean observing systems. They provide valuable data that is used to track the movement of waves, to predict the weather, and to warn ships of dangerous conditions at sea.

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Doppler effect is the shift in frequency as the object gets near an object/person or far away from an object or person.

Hope it helps!

Answer:

V = 3.00E^8 m/s      speed of light

1 m = 1.00E-3 km

1 h = 3600 s

V = 3.00E8 m/s * 1.00E-3 km / m * 3.60E3 s/h

V =  1.08E9 km/h

a) would be the closest but it is missing a superscript

Answer:

JAJAJA

Explanation:

you need to learn but the answer is your sus jajaja

Answer:

20 meters/sec

Explanation:

See attachment.

2m/s^2 = (v - 0)/10s

v = 20 m/s

Answer:

300N

Explanation:

If both people push the box in the same direction the force applied to the box is the sum of the N from both peoplef:

100N + 200N = 300N

Answer:

60 sec

Explanation:

60m because in every 30min in 2sec so 30 × 2= 60 min

The total charge flown across any cross section of the wire in time interval 0-T is determined from the area under the curve as ¹/₂i₀T.

option (2) is the correct answer.

The total charge flown across any cross section of the wire in time interval 0-T is calculated as follows;

The total charge flowing = area under the curve

area under the curve = ¹/₂ x base of the triangle x height of the triangle

area under the curve = ¹/₂ x T  x i₀

area under the curve = ¹/₂i₀T

Thus, the total charge flown across any cross section of the wire in time interval 0-T is determined from the area under the curve as ¹/₂i₀T.

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Answer: 0.8

Explanation:

The efficiency is defined as the ratio of total imput energy that is actually utilized to the end of the device.

So if we have a total transfer of 1500j of energy, and 1200j are used to heat the thing inside the kettle, 300j are not used to the actual function of the kettle.

So the efficiency is n = 1200j/1500j = 0.8

This means that a 80% of the energy imput is actually used to heat the kettle.

Over a long time, the bulb will continue to emit light steadily as long as the circuit remains closed and power supply is consistent.

When the switch is first moved to position 1, the circuit is completed and current starts flowing through the bulb. Just after the switch is closed, the bulb will start to glow as it receives electrical energy.
Step-by-step explanation:
1. Switch is moved to position 1, closing the circuit.
2. Current begins to flow through the circuit and reaches the bulb.
3. The bulb starts to glow as it converts electrical energy into light energy.
4. Over a long time, the bulb will continue to emit light steadily as long as the circuit remains closed and power supply is consistent.

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