Calculate the mass of a lorry that has a momentum of 4600 kg m/s and a velocity of 15m/s. Give your answer to two decimal places
PLZZZ HELP

Due to the law of gravity, or gravitation, which draws all objects with mass in its vicinity toward it, Mars' gravitation is a natural occurrence.

.53 s the astronaut is in the atmosphere.

astronaut jump form .49 m.

from motion Equation : v= u + at

then we can find t = \(\frac{v-u}{a}\) = -1.88/ 3.5 = .53 sec

s = ut + ½at²

put u = 1.88 a= -3.5 and t= .53

s = .49 m

.53 s the astronaut is in the atmosphere.

astronaut jump form .49 m.

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C. They are probably the same temperature. it is likely that both the red book and the blue book are at the same temperature.

The color of an object does not inherently determine its temperature. The perceived color of an object is based on the wavelengths of light it reflects or absorbs. While different colors may have different abilities to reflect or absorb light, this does not necessarily indicate differences in temperature. Without additional information about the books or their exposure to external heat sources, it is reasonable to assume that both books sitting on the table would be at the same ambient temperature. In the absence of any specific heating or cooling mechanisms acting on the books, they would equilibrate with the surrounding environment and reach the same temperature over time.

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Answer:

D

Explanation:

Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

Answer: D

Explanation:Trees are obviously effected from deforestation.

Pollution effects the things trees need to grow (water, air).

Reduction removes parts of the tree, some parts being needed.

The interpretation of coefficient estimates from WLS depends on the weights that are assigned to the observations, and the rationale behind those weights.

Coefficient estimates from WLS (Weighted Least Squares) are interpreted in a similar way to those from OLS (Ordinary Least Squares) regression. The main difference is that WLS gives different weights to different observations, while OLS gives equal weights to all observations.

In WLS, the coefficient estimates represent the change in the dependent variable for a one-unit change in the independent variable, while holding all other variables constant. However, the interpretation of the coefficients depends on the weights that are assigned to the observations.

For example, if the weights are based on the reliability of the observations, then the coefficient estimates represent the change in the dependent variable for a one-unit change in the independent variable, for the most reliable observations. If the weights are based on the importance of the observations, then the coefficient estimates represent the change in the dependent variable for a one-unit change in the independent variable, for the most important observations.

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The endocrine glands of endocrine system are mentioned as follows -

1. Hypothalamus

2. Anterior Pituitary

3. Posterior Pituitary

4. Thyroid gland

5. Adrenal glands

6. Testis

7. Pancreas

8. Parathyroid gland

9. Ovary

Hypothalamus is the control coordinating centre and maintains homeostasis. The anterior pituitary is responsible for cellular processes and posterior pituitary maintains ion balance. Thyroid gland regulates metabolism, adrenal glands prepare body for stress conditions.

Testis is responsible for secondary characteristics of males, pancreas aids digestion, parathyroid gland has role in calcium and phosphorus levels and ovary is responsible for reproduction.

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Answer:

\(v_y = 5\ m/s\)

Explanation:

The vertical downward component of the speed of the bike can be simply found out by using the following geometric formula:

\(v_y = vSin\theta\)

where,

\(v_y\) = vertical downward component of speed = ?

v = speed = 10 m/s

θ = angle of slope = 30°

Therefore,

\(v_y = (10\ m/s)Sin\ 30^o\\v_y = 5\ m/s\)

Pyramid collision, recommendations are made specifically for each person depending on their age, gender, and amount of physical activity. The consumption of cereals,  milk, veggies, fruit, and oils are the main.

A health impact pyramid: what is it?

The Health Benefit Pyramid is a diagram that shows the many levels of impact that can come from interventions in public health. Attempts to deal with the social determinants that potentially affect your health are at the bottom of the pyramid, suggesting interventions with the highest potential impact. Housing, financial stability, public safety, jobs, education, and the environment are a few examples of these. The broader determinants of health are these.

What are the four primary categories of factors that affect health?

Numerous variables affect health, including These circumstances are referred to as social determinants, which are the socioeconomic factors that influence life expectancy and quality of life and support health. Examples of these factors include accommodation, education, access to food, and transportation. Too frequently, people lack control over their ability to access these resources that influence their health.

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Answer:

To raise the mass to an altitude of 12,000 Km 2E joules are required.

Explanation:

Gravitational Potential Energy

It's the energy stored in an object because of its vertical position or height in a gravitational field.

It can be calculated with the equation:

U=m.g.h

Where:

m = mass of the object

h  = height with respect to a fixed reference

g  = acceleration of gravity, or \(9.8 m/s^2\).

If a mass has a height h1, its potential energy is

\(U_1=m.g.h_1\)

If a mass has a height h2, its potential energy is

\(U_2=m.g.h_2\)

The ratio of both potential energies is:

\(\displaystyle \frac{U_2}{U_1}=\frac{m.g.h_2}{m.g.h_1}\)

Simplifying:

\(\displaystyle \frac{U_2}{U_1}=\frac{h_2}{h_1}\)

Solving for U2:

\(\displaystyle U_2=U_1.\frac{h_2}{h_1}\)

Since U1=E:

\(\displaystyle U_2=E.\frac{12,000~Km}{6,000~Km}\)

\(U_2 = 2E\)

To raise the mass to an altitude of 12,000 Km 2E joules are required.

The net force on a vehicle that is accelerating at a rate of 1.8 m/s2 is 2100 N. The approximate mass of the vehicle in kg is 1166.67kg.

The word "force" has a clear definition. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains." One thing experiences a force from another. There are both living things and non-living objects in the concept of a force.

The vector sum of the forces exerted on a particle or object is known as the net force. The original forces' impact on the motion of the particle is replaced by the net force, which is a single force.

Force ( F ) is 2100N

Acceleration ( a ) is 1.8m/s²

Mass(m)= ?

According to formula;

Force = mass × acceleration

F= m × a

2100 = m × 1.8

2100 / 1.8 = m

Therefore, m = 1166.6kg.

Thus, The net force on a vehicle that is accelerating at a rate of 1.8 m/s2 is 2100 N. The approximate mass of the vehicle in kg is  1166.67kg.

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Given,

m1 = Mass of Astronaut

m2= Mass of tank

v1 = Velocity of Astronaut

v2 = Velocity of tank

Concept used,

According to the rule of conservation of momentum, absent an external force, the combined momentum of two or more bodies operating upon one another in an isolated system remains constant. based on the preservation of linear momentum.

m1.v1= m2.v2

v1= m2.v2/m1

= 10×12/60

= 2m/s

Distance = Speed × Time

= 2×60= 120m

So, the maximum distance she can travel is 120 m.

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The magnitude of the force of friction on the box is = 2.0 x 10²

Solution:

Mass of box = 1.0 x 10²kg

Acceleration = 2 m/s²

Force = mass x acceleration

Force = 1.0 x 10² x 2.0

Force = 2.0 x  10²

The static friction value is the value from zero to the minimum force required to initiate motion. The magnitude of static friction is directly proportional to the magnitude of the normal force and the roughness between the sliding surfaces. The coefficient of friction is the ratio of the magnitude of the frictional force divided by the magnitude of the normal force.

Force magnitude is measured in units of mass times length versus the square of time. The most common unit in the metric system is Newton where 1 Newton is 1-kilogram times 1 second squared. Frictional forces are opposing forces created between two surfaces that tend to move in the same direction or opposite directions.

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A material yields or flows when under stresses greater than its elastic limit. For such materials, the elastic limit signifies the transition from elastic to plastic behavior.

Stresses above the elastic limit cause fracture in the majority of brittle materials with almost minimal plastic deformation.

What is plastic behavior?

A material displays plastic behaviour under forces that exceed the elastic limit. This means that even after the load has been removed, the material has irreversibly changed shape and size. The material deforms plastically as the tension is gradually increased past the elastic limit.

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Given that the asteroid takes 924.137 days to orbit the Sun, we need to find its orbital radius in millions of kilometers. We will use Kepler's third law of planetary motion to find the distance.

Kepler's third law of planetary motion is given by:T² ∝ R³Where T is the time period of the orbit and R is the mean distance of the object from the center of mass of the system.So, T² = kR³Where k is a constant of proportionality, which is the same for all the planets and satellites orbiting the same star.

Using the given data,T = 924.137 days The time period of one earth year = 365.2422 days Therefore, the time period of the asteroid in earth years = 924.137/365.2422 = 2.5299 yearsTaking k = 1, we getT² = R³2.5299² = R³6.4203 = R³Therefore, the orbital radius R = ∛6.4203 million km ≈ 1.906 million kmHence, the orbital radius of the asteroid is approximately 1.906 million km.

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According to the Newton's second law,

where F is the force on the object, m is the mass of the obect and a is the acceleration of the object.

Substituting the known values,

Thus, the mass of the object is,

Hence, the mass of the object is 6 kg.

To achieve a magnification of 3.00, the convex lens should be held at a distance of 6.0 cm from the tiny insect.

The magnification (m) of a lens is given by the formula:

m = - (di / do)

where di is the image distance and do is the object distance.

For a magnifying glass formed by a convex lens, when the object is placed within the focal length of the lens, the image formed is virtual, upright, and magnified.

In this case, the focal length (f) of the convex lens is given as 18.0 cm, and the desired magnification (m) is 3.00.

Using the magnification formula, we can rearrange it to solve for the object distance (do):

do = - (di / m)

Since the magnification is positive, the image distance (di) will also be positive.

Substituting the given values, we have:

do = - (di / 3.00)

We want the magnification to be 3.00, so the object distance (do) should be three times the image distance (di).

Since the lens is used as a magnifying glass, the image distance (di) is considered negative.

If we take the image distance (di) as -2.0 cm, the object distance (do) will be -6.0 cm.

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It is a well-known fact that often applying force does not cause a change in the condition of motion. For instance, even if you use all of your force, a hefty box could not budge at all. Again, attempting to push a wall has no noticeable effect.

Because you pushed against the wall, but the wall pushed back against you with an equal and opposite force, you slide in the opposite direction (away from the wall).

Therefore, There are just two forces at work: friction and gravitation. Yes, the frictional force's magnitude must match the weight. Given that it is parallel to the wall, the friction is in the vertical direction (which is vertical)

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A battery is an electrochemical device that generates electricity from a chemical reaction. It typically consists of two electrodes, an anode and a cathode, separated by an electrolyte, which is a solution or medium that conducts ions.

The chemical reaction between the electrodes and the electrolyte generates a flow of electrons, which can be harnessed to power electrical devices.The flow of electrons generated by the chemical reaction in a battery is a one-way process and cannot be reversed. When the battery is connected to a circuit, the electrons flow from the anode to the cathode, producing an electrical current.

However, the reverse flow of electrons, from the cathode to the anode, cannot be achieved by simply reversing the direction of the current. This is because the chemical reaction that generates the flow of electrons is not reversible.Different types of batteries use different chemical reactions to generate electricity. For example, alkaline batteries use zinc as the anode and manganese dioxide as the cathode, while lead-acid batteries use lead as the anode and cathode and sulfuric acid as the electrolyte.

Lithium-ion batteries, which are commonly used in portable electronic devices, use lithium ions as the charge carriers and graphite as the anode.In conclusion, a battery is an electrochemical device that generates electricity from a chemical reaction and cannot be run in reverse. The chemical reaction is a one-way process that generates a flow of electrons from the anode to the cathode, producing an electrical current that can be used to power electrical devices.

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Answer:-00=;op

Explanation:poop

Answer:

450 hz X 4 = 1800

Explanation: Speed =

Wavelength (4) X frequency (450)

Im not 100% sure though

To store 10.0 J of potential energy in this spring, the total length of the spring would be approximately 14.86 cm.

To find the total length of the spring when 10.0 J of potential energy is stored in it, we can use Hooke's law and the formula for potential energy in a spring.

Equilibrium length (length when nothing is attached): 13.00 cm

Length when a 3.15-kg weight is hung from it: 14.50 cm

Desired potential energy: 10.0 J

First, let's calculate the spring constant (k) using the given lengths.

The displacement (x) of the spring can be calculated as:

x = Length with weight - Equilibrium length

x = 14.50 cm - 13.00 cm

x = 1.50 cm

Next, we can calculate the force exerted by the weight:

The force (F) exerted on the spring is equal to the product of the mass and the acceleration due to gravity.

F = 3.15 kg * 9.8 m/s^2

F = 30.87 N

By applying Hooke's law, we can determine the spring constant (k).

k = F / x

k = 30.87 N / (1.50 cm / 100) [Converting cm to meters]

k ≈ 2058.0 N/m

Now, we can use the formula for potential energy in a spring to find the total length (L_total) when 10.0 J of potential energy is stored:

Potential energy (U) = (1/2) * k * x^2

10.0 J = (1/2) * 2058.0 N/m * (x)^2

20.0 J = 2058.0 N/m * (x)^2

(x)^2 = 20.0 J / 2058.0 N/m

x ≈ sqrt(0.00972 m^2)

x ≈ 0.0986 m

Finally, the total length (L_total) of the spring is:

L_total = Equilibrium length + x

L_total = 13.00 cm + 0.0986 m [Converting meters to centimeters]

L_total ≈ 14.86 cm

Therefore, to store 10.0 J of potential energy in this spring, the total length of the spring would be approximately 14.86 cm.

The question should include:
If you wanted to store 10.0Joules of potential energy in this spring, what would be its total length? cnsidering that it continues to obey Hooke's law.

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Answer:

The intensity of the net electric field will:

\(E_{net}=E_{1}+E_{2}=2.52*10^{7}\: N/C\)

Explanation:

Here we need first find the electric field due to the first charge at the midway point.

The electric field equation is given by:

\(|E_{1}|=k\frac{q_{1}}{d^{2}}\)

Where:

So, we will have:

\(|E_{1}|=(9*10^{9})\frac{20*10^{-6}}{0.1^{2}}\)

\(|E_{1}|=1.8*10^{7}\: N/C\)

The direction of E1 is to the right of the midpoint.

Now, the second electric field is:

\(|E_{2}|=k\frac{q_{2}}{d^{2}}\)

\(|E_{2}|=(9*10^{9})\frac{8*10^{-6}}{0.1^{2}}\)

\(|E_{2}|=7.2*10^{6}\: N/C\)

The direction of E2 is to the right of the midpoint because the second charge is negative.

Finally, the intensity of the net electric field will:

\(E_{net}=E_{1}+E_{2}=2.52*10^{7}\: N/C\)

I hope it helps you!

The net electric field midway between these two charges is 2.52 x 10⁷ N/C.

The electric field strength between two point charges is the force per unit charge.

Electric field strength due to +20.0 μC charge

\(E _1 = \frac{kq_1}{r^2} \\\\E_ 1 = \frac{9 \times 10^9 \times 20 \times 10^{-6}}{(0.1)^2} \\\\E _1 = 18 \times 10^6 \ N/C\)

Electric field strength due to -8μC charge

\(E _2 = \frac{kq_2}{r^2} \\\\E_ 2 = \frac{9 \times 10^9 \times 8 \times 10^{-6}}{(0.1)^2} \\\\E _2 = 7.2 \times 10^6 \ N/C\)

The net electric field midway between these two charges is calculated as follows;

\(E_{net} = 18 \times 10^6 \ + \ 7.2 \times 10^6\\\\E_{net} = 25.2 \times 10^6 \ N/C\\\\E_{net} = 2.52 \times 10^7 \ N/C\)

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Answer:

False.

Explanation:

An aurora is a natural electric phenomenon that creates bright and colorful light displays in the sky. These dramatic and colorful lights are created when electrically charged particles from solar winds enter the Earth's atmosphere and interact with gases in the atmosphere.

If the tension in the cord is 130 N, it will take a pulse to travel from one support to the other at 2.31 seconds.

To determine the time that will take a pulse of travel, we use the  formula:

r = distance ÷ speed

First, we must find the mass per unit length of the cord.

The mass of the cord is 0.65 kg.

The cord is stretched between two supports 8.4 m apart.

The mass per unit length of the cord is

⇒ µ = 0.65 ÷ 8.4

⇒ µ = 0.774 kg/m

The tension in the cord is 130 N.

The velocity of the cord is

⇒ v = √ (T ÷ µ)

⇒ v = √ (130 ÷ 0.774)

⇒ v = 12.96 m/s

The time will be:

r = distance ÷ speed

r = 30 ÷ 12.96

r = 2.31 seconds

The time will take a pulse to travel from one support to the other is 2.31 seconds.

Your question is incomplete, but most probably  your full question was

A cord of mass 0.65 kg is stretched between two supports 8.4 m apart. If the tension in the cord is 130 N, how long will it take a pulse to travel from one support to the other?

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Answer:

0.1 amps or A

Explanation:

I believe to calculate that you would have to use the formula V = IR and change it to:

I = V/R

I = 1.5/15

I = 0.1 amps or A

The density of the unknown sample is 0.67 g/ml.

To calculate the density, we use the formula:

Density = Mass / Volume

Mass = 38.00 g

Volume = 56.39 ml

Substituting the values into the formula:

Density = 38.00 g / 56.39 ml

Dividing the mass by the volume, we find:

Density = 0.674 g/ml

Rounding to two decimal places, the density of the unknown sample is 0.67 g/ml.

Density is a measure of how much mass is contained within a given volume. In this case, we are given the mass of the unknown sample as 38.00 g and its volume as 56.39 ml. To find the density, we divide the mass by the volume. By performing the calculation, we obtain a density of 0.674 g/ml.

When rounding the value to two decimal places, the density of the unknown sample is 0.67 g/ml. This means that for every milliliter of the sample, there is 0.67 grams of mass. Density is an important property in chemistry and materials science as it can help identify substances and determine their behavior in various applications.

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Answer:

20mA

Explanation:

because it is connected in series with the ammeter

The current through the 40Ω resistor in the given circuit is 20mA, which is explained below.

The volate across resistor R is 1V, as indicated by the voltmeter.

Since the potential of the battery is 3V, according to Kirchoff's voltage law, the voltage drop across 20Ω resistors must be 1V each since they are indentical.

Let a total current I passes through 20Ω resistor as it is connected to the battery in series. From Ohm's law:

20Ω × I = 1V

I = 50mA

Now the current indicated by the ammeter is 20mA which splits according to the reistors of 15Ω and 30Ω which are connected in parallel. Then again the current adds up to 20mA when leaving the set of parallel resistors, through the 40Ω resistor.

So the current through the 40Ω resistor is 20mA

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Answer:

Cells come from other pre-existing cells

Explanation:

Answer:

Cell discovery and cell theory

Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells. Rudolf Virchow confirms that all cells must come from pre-existing cells.

Explanation:

i looked it up

Answer:

To answer your question use the code ICE on here to get your answer works every time for me hope this helps

When the balloon comes in contact with the tissue paper  it will stick to the balloon because the tissue paper is positively charged.

Static electricity is the electrical current generated when a negatively charged material polarize other material temporarily. When a material is rubbed with a conducting surface it will gain electrons and become s negatively charged.

When this negatively charged body comes in contact with a nonpolar material, The non-polar one will be polarized partially and its positive charges will allocate near the negative charges.

When the balloon is rubbed on a wool it gans negative charges and the electrons from the balloon tends to attract the positive pole of the tissue paper and the paper will stick on it. Thus, option B is correct.

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