what is the gpe of a 200g ball that is 10m off the ground​

Explanation:

Hii the 4 forces would be thrust,drag,lift and weight.

Answer:

The ball hits the bat

Explanation:

.......

The initial speed of the projectile is 18.5m/s

Projectile motion is the motion of an object thrown into the air under gravity. Examples of projectiles include a fired bullet, a thrown javelin e t.c

When a projectile is launched horizontal, it's horizontal range is given as R = u(√2h/g)

R = 300ft = 91.44meters

h= 120m

therefore 91.44= u( √ 2×120/9.8)

91.44 = u ( √24.49)

91.44 = 4.95 u

divide both sides by 4.95

u = 91.44/4.95

u = 18.5m/s

therefore the speed of the projectile is 18.5m/s

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The time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

The cooling law is given by:

$$\frac{dQ}{dt}=-k(T-T_0)$$

where Q is the heat in the object, t is the time taken, T is the temperature of the object at time t, T0 is the temperature of the environment and k is a constant known as the cooling constant.

We need to find the time it takes for the coffee to reach a drinking temperature of 73°C given that its initial temperature is 93°C.

Therefore, we need to find the time it takes for the coffee to cool down from 93°C to 73°C when placed in a room temperature of 18°C.

Let’s assume that the heat energy that is lost by the coffee is equal to the heat energy gained by the environment. We can express this as:

dQ = - dQ where dQ is the heat energy gained by the environment.

We can substitute dQ with C(T-T0) where C is the specific heat capacity of the object.

We can rearrange the equation as follows:

$$-\frac{dQ}{dt}=k(T-T_0)$$

$$-\frac{d}{dt}C(T-T_0)=k(T-T_0)$$

$$\frac{d}{dt}T=-k(T-T_0)$$

The differential equation above can be solved using separation of variables as follows:

$$\frac{d}{dt}\ln(T-T_0)=-k$$

$$\ln(T-T_0)=-kt+c_1$$

$$T-T_0=e^{-kt+c_1}$$

$$T=T_0+Ce^{-kt}$$

where C = e^(c1).

We can now use the values given to find the specific value of C which is the temperature difference when t=0, that is, the temperature difference between the initial temperature of the coffee and the room temperature.

$$T=T_0+Ce^{-kt}$$

$$73=18+C\cdot e^{-0.09t}$$

$$55=C\cdot e^{-0.09t}$$

$$C=55e^{0.09t}$$

$$T=18+55e^{0.09t}$$

We can now solve for the value of t when T=93 as follows:

$$93=18+55e^{0.09t}$$

$$e^{0.09t}=\frac{93-18}{55}$$

$$e^{0.09t}=1.3636$$

$$t=\frac{\ln(1.3636)}{0.09}$$

Using a calculator, we can find that the time taken for the coffee to cool from 93°C to 73°C is approximately 36.1 minutes.

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Answer:

Explanation:

Answer

The true fact is that C is what happens in outer space.  Both rotations take 27.3 days.  

A: The exact opposite is true. It does rotate about it's axis.

B: Again this is just plain false. Given the way we observe it, the moon must be rotating around the earth.

D. they don't. 27.3 hours and 24 hours are not the same.

Answer:the velocity and the kinetic energy of the HSR if it travelled a distance of 180 km in just 1h 30min minutes.  

In your answer, explain how can you know if the HSR has more kinetic energy. How can kinetic energy be transferred or transformed?  

Explanation:suiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

The kinetic energy of the given mass is 2173 kJ. The energy of an object or body due to its movement is called kinetic energy.

It is the energy of an object or body due to its movement. It can be calculated by the formula,

\(KE = \dfrac 12 mv^2\)

Where,

\(m\) - mass = 400 tons = 400000 kg

\(v\) - velocity

First, calculate the velocity.

\(v = \rm \dfrac {180 \km}{1.5 \ hours}\\\\v = 12 km/h\\\\v = 3.3 m/s\)

Now, put the values in the formula,

\(KE = {\rm \dfrac 12 400000\ kg \times (3.3 \ m/s)^2}\\\\KE = 2178000 {\rm \ kg .m^2/s^2}\\\\KE = 2173\rm \ kJ\)

Therefore, the kinetic energy of the given mass is 2173 kJ.

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Answer:

To help push yourself to reach the goal, It can also help you pace yourself time wise

Explanation:

Answer:

fiction

Explanation:

When two opposite forces act perpendicular to an axis, it causes rotational motion or torque.

Torque and couple are both related to rotational motion and are often used interchangeably, but they refer to slightly different concepts.

Torque is a measure of the force that causes an object to rotate around an axis or pivot point.

It is equal to the force applied multiplied by the perpendicular distance between the axis and the line of action of the force. Torque is a vector quantity, meaning it has both magnitude and direction. Its unit of measurement is Newton-meters (Nm) or foot-pounds (ft-lbs) in the English system.

A couple, on the other hand, is a pair of equal and opposite forces that act on a body but do not cause it to translate. Instead, they create a pure rotational motion.

A couple generates torque, but unlike a single force, it doesn't have a line of action or a specific point of application. Instead, a couple is characterized by its magnitude and the distance between the forces. Couples are often used in mechanics to model rotational systems and analyze the behavior of rotating bodies.

Torque is the measure of the force that causes rotational motion, while a couple is a pair of forces that create pure rotational motion without causing any translation.

Therefore, If two opposite forces act perpendicular to an axis, it causes rotational motion or torque.

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Answer:

(b) In this case, both disks reach the same maximum height.

(d) In this case, the disk with larger mass would reach a greater maximum height than the lighter disk because the gravitational force will be greater and this would be greater than the frictional force that opposes the motion. Therefore, the greater mass disk will be able to overcome the frictional force and reach a greater maximum height.

To calculate the average power of the elevator motor, we need to find the work done by the motor and divide it by the time interval. The work done can be calculated using the formula: Work = Force × Distance.

Initially, the elevator is at rest, so the net force acting on it is the force required to overcome its own weight. The weight is given by the formula: Weight = mass × acceleration due to gravity = 500 kg × 9.8 m/s^2 = 4900 N.

To accelerate the elevator, an additional force is required. This force can be calculated using Newton's second law: Force = mass × acceleration. The acceleration is given as 1.75 m/s^2, and the mass is 500 kg, so the force is 500 kg × 1.75 m/s^2 = 875 N.

The distance traveled during acceleration can be found using the formula: Distance = (1/2) × acceleration × time^2. Plugging in the values, we get Distance = (1/2) × 1.75 m/s^2 × (3.00 s)^2 = 7.875 m.

Now we can calculate the work done by the motor: Work = (Force × Distance) + (Weight × Distance) = (875 N + 4900 N) × 7.875 m = 40,987.5 J.

The average power can be calculated by dividing the work done by the time interval: Average Power = Work / Time = 40,987.5 J / 3.00 s = 13,662.5 W.

To convert the power from watts to horsepower, we divide by 746: Pave = 13,662.5 W / 746 = 18.33 hp.

When the elevator reaches its cruising speed, it is moving at a constant velocity, which means there is no net force acting on it. Therefore, the motor power required to maintain the cruising speed is zero. Thus, Pcruising = 0 hp.

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Answer: Frictional force is when it happens on purpose and normal force is when it happens normal and you are not trying to make it happen on purpose.

Explanation: friction happens on purpose and sometimes you can't control friction but friction is an important thing.

The net displacement can be calculated by summing the three vectors.

15m, \(135^{0}\) have x = -7.5m and y = 7.5m

35m, \(40^{0}\) NW have x = -26,8m and y = 22.5m

20m, \(15^{0}\) NE have x = 19.3m and y = 5.2m

The the net displacement is x = -15m and y = 35.2m or 38.26m, \(23.07^{0}\) NW

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An archeologist is exploring a cave; she follows a secret passage 15 m, 135°, then 35 m, 40° NW. Finally, 20 m, 15° NE. The net displacement -15m and y = 35.2m or 38.26m,  NW.

The net displacement can be calculated by summing the three vectors.

15m,  have x = -7.5m and y = 7.5m

35m,  NW have x = -26,8m and y = 22.5m

20m,  NE have x = 19.3m and y = 5.2m

The the net displacement is x = -15m and y = 35.2m or 38.26m,  NW

Displacement vectors have a length or magnitude equal to the shortest distance between a start point and an end point. Adding vectors to get a net displacement requires separating them by dimensions, and . And displacement vectors, like all vectors, have both a magnitude, or length, and a direction.

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Explanation:

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. ... The gravitational potential energy is equal to its weight times the height to which it is lifted. PE = kg x 9.8 m/s2 x m = joules. The 9.8 us the gravitational acceleration constant.

so the answer is "the gravitational potential energy is decreasing"

Eating broccoli absorbs chemical energy that your body converts to energy that your body needs, such as energy for movement , temperature control and other life processes.

 This refers to a green plant that is edible. It is in the cabbage famil. It has a large flowering head, stalk, and small associated leaves that are eaten as a vegetable. Broccoli is classified in the Italica cultivar group of the species Brassica oleracea.

Broccoli is a nutrient-rich vegetable that may enhance your health in a variety of ways, such as by reducing inflammation, improving blood sugar control, boosting immunity, and promoting heart health.

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Answer:

The less mass an object has, the less its gravitational  [force.]

Explanation:

Newton's Law of Gravity states that \(F_G=\frac{Gm_1m_2}{r^{2}}\). The two m values are the objects' masses, G is the gravitational constant, and r is the distance between the objects' centers. Notice how the mass values are in the fraction's numerator? That means increasing the mass of one or both objects increases \(F_G\). That also implies the inverse; decreasing the mass of one or both objects decreases \(F_G\)!

I hope this helps you understand this concept a little more! Have yourself a fantastic day, 'kay?

Natural light was provided in early Christian basilicas through the use of architectural features such as clerestory windows, large openings, and light-reflecting surfaces.

The primary source of natural light in these basilicas came from clerestory windows. Clerestory windows are a series of high windows placed near the roof, above the lower levels of the structure. These windows allowed sunlight to enter the building from above and illuminate the interior space.

Another method of providing natural light in early Christian basilicas was through large openings or doorways on the side walls of the nave. These openings allowed sunlight to enter the building directly and cast light into the central space.

Additionally, light-reflecting surfaces such as polished marble, mosaics, and light-colored stone were used to enhance the natural light in the basilica. These materials would reflect and disperse sunlight throughout the interior, making the space appear brighter and more inviting.

In summary, natural light in early Christian basilicas was provided through a combination of clerestory windows, large openings on the side walls, and the use of light-reflecting surfaces. These architectural features allowed for a bright and illuminated interior, creating an inviting space for worship and religious activities.

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Answer:

The average speed is \(v = 1260 \ km/s\)

The average speed is different from the average velocity in this question

Explanation:

From the question we are told that

   The equatorial  radius of Jupiter is  \(R_j = 7.1*10^{4} \ km\)

   The period of oscillation of Jupiter is \(T_J = 9 \ hours , 50 \ min = 35400 \ seconds\)

Generally the average speed is mathematically represented as

      \(v = \frac{2 \pi * R_j }{T_J}\)

=>   \(v = \frac{2 *3.142 * 7.1*10^{4} }{35400}\)

=>   \(v = 1260 \ km/s\)

Generally in average speed the direction is not considered while in average velocity the direction is considered for the  case of this question the movement equitorial point has no direction in that it start from one point and after its periodic motion it still remains at that point

Answer:

C.

The density of ice is less than the density of water.

The ice float on water because the density of ice is less than the density of water.

The density of a material describes how dense it is in a given area. A substance's density is determined by its mass per unit volume. Density is essentially a measure of how tightly something is packed.

It is a particular physical quality of a specific thing. Discovering the density principle was done by the Greek scientist Archimedes. If you are familiar with the formula and the required units, calculating density is simple. Alternatively to the symbol, the letter D can be used to denote density.

ρ=m/v where,

ρ is the density,

m= mass of object and,

v is the volume of the object.

Hence, the density of ice is 917 kg/m³, which is less than the density of water which is 997.7 kg/m³ and due to this reason the ice floats on water.

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A.Bohr

His model postulated the existence of energy levels or shells of electrons. Electrons could only be found in these specific energy levels; in other words, their energy was quantised, and couldn’t take just any value. Electrons could move between these energy levels but had to do so by either absorbing or emitting energy.

A. Bohr!

This answer is correct because I read the information.

Answer:

answer is add 3 to both sides

The restoring force F of a spring is proportional to its displacement x from its equilibrium position. This law is called Hooke's law, and it can be written mathematically as follows:

F = − kx

where k is the spring constant

The period of motion can be determined by the following formula:

T=2π\(\sqrt{\frac{m}{k} }\)

where, m = the mask = spring constant

Let the amplitude of motion be A. The total energy of a mass attached to a spring is given by:

E=\(\frac{1}{2}\)k\(A^2\)

The maximum kinetic energy of the mass is given by

K = \(\frac{1}{2}\)m\(v^2\)

The maximum potential energy is given by

U = \(\frac{1}{2}\)k\((A + x_0)^2\)

where \(x_0\) is the displacement of the mass from the equilibrium position when it is released from a point 8 inches above the equilibrium position with an upward velocity of 5 ft/s. The maximum potential energy is equal to the maximum kinetic energy.

Equating the two, we have:

\(\frac{1}{2}\)m\(v^2\) = \(\frac{1}{2}\)k\((A + x_0)^2\) ⇒ A + \(x_0\) = \(\sqrt{\frac{mv^2}{k} }\)

Using this value of A + \(x_0\), we can determine the amplitude of motion as follows:

A = \(\sqrt{\frac{mv^2}{k} }\) − \(x_0\)

The mass in pounds can be converted to slugs as follows: \(m = \frac{54}{32.2} = 1.68\) slugs.

The displacement x of the spring from its equilibrium position can be determined as follows: \(x = \frac{3.84}{12} = 0.32\) ft.

The spring constant k can be determined using the formula:

\(k=\frac{k}{x}\)

where F is the force exerted on the spring when it is stretched by the mass.

The force F can be determined using the formula: F = m * g where g is the acceleration due to gravity.

Substituting the values, we get: F = 1.68 * 32.2 = 54.1 lbf

Substituting these values into the formula for k, we get \(k =\frac{54.1}{0.32} = 169.0\) lbf/ft.

The period of motion can be determined using the formula: T = 2π\(\sqrt{\frac{m}{k} }\).

Substituting the values, we get: T = 2π\(\sqrt \frac{1.68}{169.0}\) = 0.504 s.

Using the value of \(x_0\), we can determine the amplitude of motion as follows: A = \(\sqrt{\frac{mv^2}{k} }\)  − \(x_0\).

Substituting the values, we get: A = \(\sqrt{ \frac{1.68*\frac{25}{9} }{169.0}} - 0.67A\)= 0.062 ft or 0.74 .

When a mass is hung on a spring, it extends from its original length to a new length. This change in length is known as the displacement. The point where the mass hangs without moving up or down is known as the equilibrium position. The restoring force, which is proportional to the displacement from the equilibrium position, acts on the mass when it is displaced from its equilibrium position. This law is known as Hooke's law. The constant of proportionality is known as the spring constant. The period of motion of the mass attached to the spring can be determined using the formula T = 2π\(\sqrt{\frac{m}{k} }\), where m is the mass and k is the spring constant. The amplitude of motion is the maximum displacement of the mass from its equilibrium position.

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Copper has a specific heat capacity of 0.386 J/g °C. We are required to calculate the amount of heat required to increase 5.00 g of copper from 0.0°C to 10.0°C is 19.30J.

The formula for calculating the amount of heat energy needed to raise the temperature of an object is as follows:q = mcΔT,

where,q = Heat energy requiredm = Mass of the substancec = Specific heat capacity of the substanceΔT = Change in temperature. Substituting the given values into the formula, we get:q = (5.00 g) (0.386 J/g°C) (10.0°C - 0.0°C)q = 19.30 J.

Therefore, the amount of heat required to increase 5.00 g of copper from 0.0°C to 10.0°C is 19.30 J.

When we apply heat to a material, its temperature increases as the heat is absorbed by the substance.

The quantity of heat energy required to increase the temperature of an object is known as heat capacity.

The specific heat capacity of a substance is the amount of heat energy required to increase the temperature of 1 gram of that substance by 1 °C.

Specific heat capacity is expressed in J/g °C.

In this question, we have to calculate the amount of heat required to increase the temperature of 5.00 g of copper from 0.0°C to 10.0°C.

Using the formula for calculating heat energy, we get 19.30 J as the answer.

Therefore, 19.30 J of heat energy is required to raise the temperature of 5.00 g of copper from 0.0°C to 10.0°C.

The specific heat capacity of copper is 0.386 J/g°C.

To calculate the amount of heat energy required to raise the temperature of a substance, we use the formula q = mcΔT.

In this problem, we applied this formula to calculate the amount of heat required to increase the temperature of 5.00 g of copper from 0.0°C to 10.0°C, and the answer was 19.30 J.

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Alloy steel mainly consists of a specific large number of alloying elements.

Alloy steel is formed when other elements containing metal and non-metal are introduced to carbon steel. The percentage of alloying elements will differ from 1.0% to 50%. On the basis of this percentage, alloy steel is categorised into two major types, low alloy steel and high alloy steel. This alloy shows different environmental, chemical and physical properties that can change with changes in elements used to make an alloy. this alloying can affect heat treatment conditions and mechanical properties of carbon steel. In general, the addition of impurities increases the strength of the steel.

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Using mirror's equation, The smallest diameter mirror in which the observer can just see the reflected edge of the coin is 6 cm.

We must compute the size of the mirror's produced image in order to identify the lowest diameter mirror that would allow the spectator to just view the coin's reflected edge.

We must first determine how far the picture is from the mirror. In order to compute this, use the mirror equation:

\(\frac{1}{f} = \frac{1}{d} + \frac{1}{d'}\)

where f is the mirror's focal length, d and d' are the object's and image's distances from the mirror, respectively.

Since the mirror is flat, the focal length is determined by dividing the radius in half. Therefore, we may apply the formula:

\(f = \frac{R}{2}\)

This results from substituting it into the mirror equation:

\(\frac{2}{R} = \frac{1}{3} + \frac{1}{d'}\)

Calculating d':

\(d' = \frac{3R}{ (R-6) (R-6)}\)

The mirror's diameter, D, is equal to 2R. As a result, the minimal diameter of the mirror, at which the spectator can only see the coin's edge reflected, can be calculated as follows:

\(D = 2R = \frac{2d' (R - 6)}{ 3}\)

d' = 9, thus we can condense it to:

D = 18 / 3 = 6 cm

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