What is the momentum of an 8-kg bowling ball rolling at 2 m/s? Make sure to
include units.

Plz help ASAP

The vibrational frequency of the child is 0.270 Hz.

The vibrational frequency of the child can be calculated by dividing the number of complete back and forth vibrations by the time taken to complete them.

Frequency = Number of vibrations / Time taken

The child makes 5 complete back and forth vibrations in 18.5 seconds, so the frequency can be calculated as:

Frequency = 5 / 18.5 = 0.27027 Hz

Rounding off to three significant digits, the vibrational frequency of the child in the swing is 0.270 Hz. The unit for frequency is hertz (Hz).

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The power developed by the student is 756.9 J/s and remains the same if the student takes the same time to climb the stairs when climbing it in two's and three's.

Power is the rate at work is done.

Work done = 65.5 × 10 × (18 × 0.165) = 1945.35 J

Power = 1945.35/2.57 = 756.9 J/s

If the student climbed the steps in two or three at a time, the power does not change if the time remains the same.

The time required to convert the Big Mac meal from McDonalds = 4 853 440/756.9

Time required = 6412.26 seconds

Therefore, from the power developed by the student, it will take him 6412.26 seconds to convert all the energy in a Big Mac meal.

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Answer:

See explanation

Explanation:

1) There are two main types of waves;

Mechanical waves and electromagnetic waves.

Mechanical waves usually require a medium for propagation, e.g sound, waves on a spiral spring, etc

Electromagnetic waves do not require a medium for propagation e.g microwaves, x-rays etc

2) The phenomenon is known as refraction. Refraction occurs at the boundary between two media because of the change in the speed of a wave as it moves from one medium to another.

The coefficient of multiple determination (R) shows the combined effects of all independents on the dependent.

So option C is correct.

The coefficient of multiple determination (R) represents the proportion of the variance in the dependent variable that can be explained by the independent variables collectively. It reflects the combined influence of all independent variables on the dependent variable. It measures the goodness of fit of a regression model and indicates how well the independent variables predict the variation in the dependent variable when used together. A partial gamma is a measure of the association between two variables, while the coefficient of multiple determination is a measure of the association between a dependent variable and all of the independent variables in a model. The coefficient of multiple determination is a more comprehensive measure of association than a partial gamma.

The control variable is not removed from the equation when calculating the coefficient of multiple determination. The control variable is used to control for the effects of other variables that may be related to the dependent variable.Therefore, option C correct.

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Electric potential is a scalar quantity as it represents the potential energy per unit charge in an electric field, which is a scalar quantity. It helps in understanding the energy level of charged particles present in an electric field.
The electric field can be calculated from the gradient of the electric potential. This is done using the following formula:
E = -∇V
where E is the electric field, V is the electric potential and ∇ is the gradient operator. The negative sign is used because the electric field points in the opposite direction to the gradient of the electric potential.
For example, if we have an electric potential of V(x,y,z) = 2x²y³z⁴, then we can calculate the electric field as follows:
E = -∇V
= -(∂V/∂x i + ∂V/∂y j + ∂V/∂z k)
= -(4xy³z⁴ i + 6x²y²z⁴ j + 8x²y³z³ k)
= -4xy³z⁴ i - 6x²y²z⁴ j - 8x²y³z³ k
This formula can be used to calculate the electric field from any electric potential function, which is important in many applications of electromagnetism, including electronics, power generation, and medical imaging.

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Collected data plays a crucial role in evaluating whether the criteria for success have been met. By analyzing the collected data, one can assess the progress made towards achieving the desired goals and determine if the criteria have been fulfilled.

Data provides an objective measure of performance or outcomes, allowing for an evidence-based assessment of success. It helps to quantify and track key metrics or indicators related to the criteria for success. By comparing the actual data with the predetermined benchmarks or targets, one can determine if the criteria have been met or if further improvements are required.

Data analysis also enables the identification of trends, patterns, and correlations, providing insights into the factors influencing success. It helps in identifying areas of strength and areas that need improvement. Additionally, data can be used for comparative analysis, benchmarking against previous periods or similar projects, to gain a broader perspective on success.

In summary, collected data provides an objective basis for evaluating progress and success by comparing actual performance against predetermined criteria, identifying areas of improvement, and gaining insights for future decision-making.

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Answer:

B

Explanation:

edge 2020

The emotional symptoms that may occur in those with a Schizophrenic disorder generally include all of the following except appropriate emotion. Hence, option (B) is correct.

Schizophrenia is a persistent, severe mental illness that has an impact on a person's relationships with others as well as their thinking, acting, and emotional expression. Despite not being as prevalent as other severe mental illnesses, schizophrenia can be the most persistent and incapacitating.

Schizophrenia patients frequently struggle to function well in relationships, the workplace, and academic settings. They can appear to have lost their sense of reality, feel afraid and withdraw. This chronic illness cannot be cured, but it can be managed with the right care.

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Answer:

Yes

Explanation:

Answer:

A

Explanation:

It’s a because a electrolyte reproduces

Answer: frosted glass

Explanation:

Answer:

C

Explanation:

Frosted Glass

Answer: E = 5.004*10^(20) joules

Explanation:

We do not have a lot of information about the impact, so we can assume that the energy released on the impact was the kinetic energy of the large fragment.

Remember that the kinetic energy of an object of mass M that moves at a velocity V is:

K = (M/2)*V^2

in this case, we know that the speed (that is equivalent to the velocity) is:

V = 60,000 m/s

And the mass is:

M = 1.39*10^(11) kg

Then the kinetic energy of the large fragment was:

K = (1.39*10^(11) kg/2)*( 60,000 m/s)^2 = 5.004*10^(20) joules.

Then we could conclude that the energy released on the impact was:

E = 5.004*10^(20) joules

12 m from the point of impact when the key is released, the speed of the boat is 4.0m/s.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is traveling along a path. In other words, velocity is a vector, whereas speed is a scalar value. Let’s take an example, 15km/hr shows the speed of a vehicle but 15km/hr east shows the velocity of the vehicle. Speed of an object can be calculated mathematically in a simple way. Speed of an object can be found by dividing distance traveled by the object by time taken to cover that distance.

The speed of the boat can be given by , v = d/t

Now, d = 12 m and t is the time the key takes to fall into the boat

Taking the initial time(time at which the key is dropped) to be 0 we calculate t when height(y) is 45 m.

y = ½(gt)^2

t =   (2y/g)^(1/2)

t = ((2*45)/9.8)^(1/2)

t = 3.03 s

Therefore, speed of the boat = (distance covered by the boat)/(time taken)

distance  = 12/(3.03)= 4.0 m/s

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Answer:

A planet can have a surface made of either liquid or gas.

Hope it helped brainiest plz and thank you.

Explanation:

Which of the following is an example of a difference between planets in the solar system?

"A planet can have a surface made of either liquid or gas."

that's the answer:A planet can have a surface made of either liquid or gas.

Answer:

A i know its correct please give brainliest  and does anydoby here play sky: children of light

Explanation:

Answer:

Three states of matter exist—solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume,

Explanation:

According to the information, the table is completed as follows: Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).

To fill the table to describe the characteristics of the states of matter we have to look for additional information of each state of matter and then complete the table. According to the information we can infer that the correct way to complete the table is:

Do they have definite shape? no (vapor), no (water), yes (ice); Do they have definite volume? no (vapor), yes (water), yes (ice); Do they compress? yes (vapor), no (water), no (ice).

Vapor | No | No | Yes

Water | No | Yes | No

Ice | Yes | Yes | No

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Inducing magnetic properties on a substance means you are aligning the electrons to spin in the same direction, 2nd option.

The magnetic intensity is the magnetic field produced solely by the electric current flowing in a solenoid. The magnetic property of a material is induced by an external magnetic field. When a material is exposed to an external magnetic field, it becomes magnetized.

A strong magnetic field is produced when the majority of electrons in an atom spin in the same direction. The magnetic field's direction is determined by the direction of electron spin.

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No

Refer to the attachment for calculations

Answer:

probaby not

Explanation:

you might get thrown in jail tho

Answer:

13,482m deep

Explanation:

1,498×9 =13,482m deep

The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.

The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:

RC = τ, where R is the resistance and C is the capacitance of the circuit.

Rearranging the above formula, we get:R = τ / C

Where τ is the time constant and C is the capacitance of the circuit.

From the figure, the capacitance is given as 0.1 μF

.Substituting the values of τ and C in the above formula, we get:

R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)

R = 220 Ω

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Nina's data in this table most accurately depict a wave with decreasing frequency. Option A is right.

A recurring event's frequency is measured by how many times it occurs in a unit of time.

To emphasize distinctions with spatial and angular frequencies, respectively, it is also sometimes referred to as ordinary frequency or temporal frequency.

If the duration, or time interval, required to complete one cycle or vibration is half a second, the frequency is 2 per second; if it is one hundredth of an hour, the frequency is 100 per hour.

The frequency and period, or time interval, are often reciprocally equal, therefore frequency = 1/period = 1 in most circumstances.

The Moon rotates about Earth about a little bit more than 12 times a year. In a violin A string vibrates at a frequency of 440 cycles per second.

Thus, the correct option is A.

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The value for the specific latent heat of the vaporization of water, based on the given information, is 3,000,000 J/kg. So the correct option is D. 3 000 000 J/kg​.

To determine the value for the specific latent heat of vaporization of water using the given information, we can apply the principle of conservation of energy.

The power of the kettle is given as 2 kW, which means it consumes 2000 Joules of energy per second. As the kettle is left on for 5 minutes (300 seconds), the total energy consumed is:

Energy = Power × Time

Energy = 2000 J/s × 300 s

Energy = 600,000 J

This energy is used to vaporize the water. Given that the balance reading changes by 0.2 kg, we know that 0.2 kg of water has been converted to steam.

To find the specific latent heat of vaporization (Lv), we divide the total energy consumed by the mass of water vaporized:

Lv = Energy / Mass

Lv = 600,000 J / 0.2 kg

Lv = 3,000,000 J/kg

Therefore, the value for the specific latent heat of vaporization of water, based on the given information, is D. 3,000,000 J/kg.

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Answer:

B

Explanation:

did this yesterday with my friend

Answer: Tagged players perform a fitness activity

Explanation: Proof of validity is shown below.

Newton first law state that anything in motion or rest will remain in motion or in rest until an external force is applied

Newton third law of motion state that every action have equal and opposite reaction

Answer:

Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. ... In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

mark me brain list please

Answer:

The thermal efficiency, \(\eta _{reheat}\), of the Rankine cycle with reheat is 36.81%

Explanation:

p₁ = 8 MPa = 80 Bars

T₁ = 450°C = 723.15 K

From steam tables, we have;

v₁ = 0.0381970 m³/kg

h₁ = 3273.23 kJ/kg

s₁ = 6.5577 kJ/(kg·K) = s₂

The p₂ = 0.8 MPa

T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K

h₂ = 2768.30 kJ/kg

\(T_{2'}\) = 400°C = 673.15 K

\(h_{2'}\) = at 400°C and 0.8 MPa = 3480.6 kJ/kg

p₃ = 10 kPa = 0.1 Bar

T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K

h₃ = 2583.89 kJ/kg

h₄ = \(h_{3f}\) = 191.812 kJ/kg

The thermal efficiency, \(\eta _{reheat}\), of a Rankine cycle with reheat is given as follows;

\(\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}\)

Therefore, we have;

\(\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681\)

Which in percentage is 36.81%.

Given,The dry bulb temperature of humid air at the inlet = 40 °C. The relative humidity of humid air at the inlet = 30%The dry bulb temperature of humid air at the outlet = 18 °C. The wet bulb temperature of humid air at the outlet = 18 °C. Liquid condensate removed in the process = 7 g/s or 0.007 kg/s or 7 kg water/kg dry air.

The specific volume of dry air at 40 °C and 30% relative humidity is 0.88 m³/kg. The specific volume of dry air at 18 °C is 0.85 m³/kg. The specific volume of saturated moist air at 18 °C is 0.865 m³/kg.

At inlet conditions, vapour pressure = 30/100 * 0.03 * 10⁵ = 900 Pa.

At outlet conditions, the vapour pressure is equal to the saturation pressure at the wet bulb temperature of 18 °C.

Using the steam table, we get the saturation pressure = 1588 Pa. The vapour pressure at the outlet = 1588 Pa.

The partial pressure of vapour removed = 900 - 1588 = -688 Pa. The negative sign indicates that no condensation occurs during this process. Since the specific volume of dry air decreases during the process, it is a constant pressure cooling process.

The mass of air flowing is equal to 1 kg. Therefore, the volume of air flowing is 0.88 m³/kg. The initial and final specific volumes of air are 0.88 m³/kg and 0.85 m³/kg respectively. The specific volume of the condensed water is negligible compared to the specific volume of the air.

Hence, we can assume that the volume of air does not change.The mass of dry air remains constant.The volume of air leaving the dehumidifier = 0.88 m³/kg.The volume of air entering the dehumidifier = 0.88 m³/kg.Since the volume flow rate of air is constant, the mass flow rate of air also remains constant.

The mass flow rate of dry air = 1 kg/s.

Therefore, the mass flow rate of water vapour is equal to the difference in mass flow rate of air between inlet and outlet.

Mass flow rate of water vapour = (mass flow rate of dry air at inlet) - (mass flow rate of dry air at outlet) = (1) - (mass of dry air leaving / density of dry air at the outlet) = 1 - 1.18(0.85) = 0.007 kg/s or 7 g/s

The mass flow rate of liquid condensate = mass flow rate of water vapour. Mass flow rate of liquid condensate = 7 g/s.

Liquid condensate removed in the process = 7 g/s or 0.007 kg/s or 7 kg water/kg dry air.

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The acceleration of a body can be calculated using the following equation:

s = ut + ½at²

Where;

400 = 0 × 20 + ½ × a × 20²

400 = 0 + 200a

a = 2m/s²

Force acting on the truck can be calculated by multiplying the mass of the truck by its acceleration as follows:

Force = 7000kg × 2m/s²

Force = 14,000N

Therefore;

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