A tennis ball is thrown straight up at 45 m/s. Calculate and compare the
displacement at 5 seconds and 6 seconds after its been thrown. *

The negative work done means the kinetic energy of the object decreases instead of increasing.

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Answer:

∆p = 20 kg * m/s

Explanation:

The change in momentum is the mass of the body multiplied by the change in its velocity.

In formula form ∆p = m * ( ∆v ).

with m = 5 kg and ∆v = 4 m/s

∆p = 5 kg * 4 m/s

∆p = 20 kg * m/s

1) The number of photons in each beam is what determines the amount of energy each beam carries. A beam of red light contains more photons than a beam of blue light, but each photon in the blue beam carries more energy than each photon in the red beam. Therefore, the two beams can carry the same amount of energy despite having different energies per photon.

2) Reflecting telescopes have two advantages over refractors. They are cheaper to manufacture, and they do not suffer from chromatic aberration.

3) Refraction is the bending of light as it passes from one medium to another. Refraction occurs because light waves travel at different speeds through different materials. The amount of refraction depends on the angle at which the light passes through the medium.

4) The image of a star is larger in the focal plane of the larger telescope. This is because the larger telescope collects more light than the smaller telescope, which means that the image is brighter and has a higher signal-to-noise ratio.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals. A higher quantum efficiency means that more of the incoming

photons are detected, which makes it easier to detect faint astronomical objects.

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1) The number of photons in each beam is what determines the amount of energy each beam carries.

2) Reflecting telescopes have two advantages over refractors.

3) Refraction is the bending of light as it passes from one medium to another.

4) The image of a star is larger in the focal plane of the larger telescope.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals.

1) The number of photons in each beam is what determines the amount of energy each beam carries. A beam of red light contains more photons than a beam of blue light, but each photon in the blue beam carries more energy than each photon in the red beam. Therefore, the two beams can carry the same amount of energy despite having different energies per photon.

2) Reflecting telescopes have two advantages over refractors. They are cheaper to manufacture, and they do not suffer from chromatic aberration.

3) Refraction is the bending of light as it passes from one medium to another. Refraction occurs because light waves travel at different speeds through different materials. The amount of refraction depends on the angle at which the light passes through the medium.

4) The image of a star is larger in the focal plane of the larger telescope. This is because the larger telescope collects more light than the smaller telescope, which means that the image is brighter and has a higher signal-to-noise ratio.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals. A higher quantum efficiency means that more of the incoming

photons are detected, which makes it easier to detect faint astronomical objects.

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Answer:

149,916J

Explanation:

Pneumonic device: Kevin is half-mad and very square

this translates to: KE=(1/2)mv^2 !!

KE=(1/2)(78)(62^2)

KE=(39)(3844)

KE=149,916 Joules

Answer:

it's 149916

Explanation:

Formula = 1/2 x m x v^2

so if you put into your calculator 1/2 x 78 x 62^2

you get 149916

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

The favor able price variance indicates that the Boise plant saved money by using the cheaper source of leather strips.

Leather is a material created from the tanned hides of animals. It is used to make a wide range of products, including clothing, furniture, shoes, and accessories. Leather is created through a process of tanning, which involves soaking the hide in a solution of chemicals and oils to preserve it and make it more durable. This process also gives leather its distinctive color and texture.

The materials price variance is the difference between what was paid for the leather strips and what would have been paid had the cheaper source been used. This variance is calculated as:

Price Variance = (Actual Price ₋ Standard Price)× Actual Quantity

In this scenario, the actual price paid for the leather strips was higher than the standard price, resulting in a favorable variance. The amount of the favorable variance equals the difference between the actual and the standard price, multiplied by the actual quantity of the leather strips purchased.

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Complete Question:

1.Break down the total variance for materials into a price variance and a usage variance using the columnar and formula approaches. Enter favorable values as negative numbers and unfavorable values as positive numbers. Price variance $[-694,800] Favorable Usage variance 633,000 X Unfavorable Total variance + Favorable vV 2. Conceptual Connection: Suppose the Boise plant manager investigates the materials variances and is told by the purchasing manager that a cheaper source of leather strips had been discovered and that this is the reason for the favorable materials price variance. Quite pleased, the purchasing manager suggests that the materials price.

The person who is known as the father of modern rocketry is Robert H. Goddard.

The world's first liquid-fueled rocket was developed and built by Robert Hutchings Goddard, an American engineer, lecturer, and inventor who lived from October 5, 1882, to August 10, 1945. Goddard's rocket was successfully launched on March 16, 1926, ushering in an era of invention and space travel. Between 1926 and 1941, he and his team fired 34 rockets, reaching speeds of up to 885 km/h (550 mph) and heights of up to 2.6 km (1.6 mi). Many of the innovations that would enable spaceflight were foreseen in Goddard's work as an engineer and thinker.

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Answer:

from a lesser hight

Explanation:

because you need less force

hope its right if it is mark brainlyest ;)

Answer:

1. 75 speed, 2. 90 second = 1hr. 30 second. 3. 125 = 1hr 60 seconds 4.

Complete Question:

A student has been assigned to measure the density of an irregularly shaped piece of metal.

Which apparatus would be most appropriate to carry out this task?

Group of answer choices

A. ruler, balance

B. beaker, crucible

C. flask, Bunsen burner

D. graduated cylinder, balance

Answer:

D. graduated cylinder, balance

Explanation:

In this scenario, A student has been assigned to measure the density of an irregularly shaped piece of metal.

The apparatus which would be most appropriate to carry out this task is a graduated cylinder and balance.

A graduated cylinder can be defined as a measuring cylinder used for the measurement of the volume of an irregularly shaped piece of metal or liquids. It is typically marked with horizontal lines on its side as units of measurement for volume. The balance is then used to weigh the metals mass.

The acceleration due to gravity of an object dropped on planet X is 8 m/s²

From the question given above, the following data were obtained:

Height (H) = 64 m

Time (t) = 4 s

Acceleration due to gravity (g) on planet X =.?

The acceleration due to gravity on planet X can be obtained as follow:

H = ½gt²

64 = ½ × g × 4²

64 = ½ × g × 16

64 = g × 8

Divide both side by 8

g = 64 / 8

Therefore, the acceleration due to gravity on planet X is 8 m/s²

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Answer:

4

Explanation:

Explanation:

Nasa picture po ang answer

the magnitude of the complex impedance as a function of ω is \(z=\sqrt{(1^2 + (0.1\omega)^2)\),  the complex impedance Z in polar form is approximately \(37.7e^(^i^8^8^.^8^)\) and  The point will lie in the first quadrant, with a distance of approximately 37.7 units from the origin and an angle of approximately 88.8 degrees with the positive x-axis.

A. The magnitude of the complex impedance can be calculated as:

\(|Z| = \sqrt{(Re(Z)^2 + Im(Z)^2)\)

Given\(Z = 1 + i0.1\omega\), where ω is the angular frequency, we can substitute ω = 2πf into the expression to calculate the magnitude as a function of f.

\(|Z| = \sqrt{(Re(Z)^2 + Im(Z)^2)}\)

= \(\sqrt{(1^2 + (0.1\omega)^2)\)

B. Given that f = 60 Hz and\(\omega = 2\pi f = 2\pi * 60 = 377\: rad/s\), we can substitute this value into the expression for Z to write it in polar form.

\(Z = 1 + i0.1*\omega\\= 1 + i0.1 * 377\\\)

\(z= 1 + i37.7\)

The polar form of Z is given, where r is the magnitude of Z and θ is the argument of Z. Therefore,

\(|Z| = \sqrt{(1 + 0.01\omega^2)}} = \sqrt{(1 + 0.01 * 377^2)} =37.7\)

\(\theta= arctan(\frac{Im(Z)}{Re(Z)} ) = arctan(37.7/1) = 88.8 \:\:degrees\)

Hence, the complex impedance Z in polar form is approximately \(37.7e^(^i^8^8^.^8^)\).

C. To sketch the location of the complex impedance on the complex plane, we can plot the point (1, 37.7) in the Cartesian coordinate system. The real part corresponds to the x-axis, and the imaginary part corresponds to the y-axis. The point will lie in the first quadrant, with a distance of approximately 37.7 units from the origin and an angle of approximately 88.8 degrees with the positive x-axis.

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Answer:

False

Explanation:

A dominant trait is a trait that is inherited from parents. It is a trait that is obtained from a particular copy or type of a gene that overshadows or overwhelms the effects of another type or copy of that gene. Dominant traits are controlled by a single gene.

Therefore , as the trait is dominant and controlled by a single gene,the mutation must have occurred on both diploid copies is a false statement.

The mechanism that is responsible for the formation of snowflakes is the nucleation of ice crystals.

This is defined as a piece of snow which falls from the sky as a result of an extremely cold climate condition and is common in the arctic regions of the world.

Snow flakes are formed when ice crystals stick together to form the flakes which usually has a dust or pollen being formed around the area being talked about.

This is also regarded as a type of precipitation such as rain etc and is therefore the most appropriate choice.

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Answer:

Car B is travelling at a faster speed

Explanation:

We are given;

Speed of car A; V_a = 30 m/s

Speed of car B; V_b = 110 km/h

Now, V_a is already in m/s, so let's convert V_b to m/s too.

From conversions, 36 km/h = 10 m/s, therefore, 110 km/h would give;

(110 × 10)/36 = 30.56 m/s

Thus, V_b = 30.56 m/s

Comparing both speeds in m/s, we can see that 30.56 m/s > 30 m/s.

Thus, Car B is travelling at a faster speed.

24  is  the average Speed of the car.

What is an average speed and an illustration?

Calculating average speed involves dividing the total distance traveled by the time interval. For instance, if it takes a person 40 minutes to travel 20 miles north, 20 miles south, and finally 20 miles in between, their average speed is 40 miles divided by 40 minutes, or 1 mile per minute (60 mph).

     a flag at 160m

  t = 8

  d = 160/8

       = 20

   d2 = 240/8

        = 30

   the average Speed = 2d1 d2/d1+d2

                                     = 2 * 20 * 30/50

                                        = 24

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Answer:

D. All bulbs will go out

Explanation:

This is a series circuit. If one bulb goes out, all the other bulbs will not light since it is now an incomplete circuit. The circuit cannot flow to the other bulbs since one bulb is out which will prevent current from flowing to the rest of the circuit.

Answer:

mars is to hot

Explanation:

25.1 m is the horizontal distance travelled by the particle when it hits the level ground

v²-u²=2gs

s=v²-u²/2g

s=100/19.6

s=5.1 m

total height=20+5.1=25.1 m

Distance, which is independent of direction, is the length between two points or things. Distance solely considers the overall magnitude and disregards the start and finish places because it is a scalar attribute. Distance can only have a positive or zero value because it is a scalar attribute; it cannot be negative.

The meter (m) is the most widely used unit of measurement for distance, however kilometers (km) can also be used to describe longer distances and centimeters (cm) or millimeters can be used to express shorter distances (mm). The distance traveled is frequently represented by the letter D when computing distance.

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Answer:

Explanation:

1st option is the correct answer......

The water displacement method is used to determine the volume of an irregular-shaped object while using a graduated cylinder.

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

The density of the irregular shape object = mass/volume

The volume of an irregular-shaped object can be measured with the help of the water displacement method.

The water displacement method is used to determine the volume of an irregular-shaped object while using a graduated cylinder.

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Based on the charge of power expended per kwh, the amount earned is calculated from the power developed in climbing the the stairs for 1 hour and the charge per kWh.

Power is defined as the time rate at which work is done.

The power developed in climbing a set of stairs is calculated as follows:

where;

For 1 hour, the power developed will be the multiplied by 3600 seconds and divided by 1000.

The value is them multiplied by $0.06.

Therefore, amount of money depends on the power developed in climbing the the stairs for 1 hour and the charge per kWh.

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Explanation:

A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

Answer:

The leverage or mechanical advantage of pulleys is less obvious, but you can "gang" multiple pulleys together into two sets (blocks) and run the ropes back and forth between the two sets to increase the number of lengths of rope running between them. One end of the rope is connected (fixed) to one of the blocks, and you get to pull on the other end after it is passed back and forth between the blocks of pulleys. This is sometimes called a block and tackle arrangement. With a hook on each side of the block set, you can move a heavy load much like levers do, by multiplying the force. You have to pull more rope just like you have to move a lever more on one side of the fulcrum as compared to the other. When you get all the rope pulled out that you can, you can not move the load anymore because you have become "two-blocked" which means the two blocks are together. Credits to: Moin Khan

Answer:

frequency = wavelength over speed. f. speed = wavelength x frequency

Explanation:

it is on google

Answer:wavelength=speed/frequency

Explanation: