A student lifts a school bag from the ground and puts it on his shoulders 1.5m above the ground. A force of 5N is acting on an object. Calculate the work done by him on the school bag.

The escape speed from the surface of the asteroid is 253.509 m/s.

Escape speed is the minimum speed that an object needs to reach in order to escape the gravitational pull of another object. In order for an object to escape the gravitational pull of a massive body, it must have enough kinetic energy to overcome the gravitational potential energy.

To calculate the escape speed from the surface of the asteroid, we need to use the following formula:

\(v = \sqrt{2GM/r}\)

where:

v = escape velocity

G = gravitational constant (6.67430 × 10⁻¹¹ m³/kg s²)

M = mass of the asteroid

r = radius of the asteroid

Substituting the given values into the formula, we get:

\(v = \sqrt{(2 \times 6.67430 \times 10^{-11} \times 1.915\times 10^{20}) / 397.5\times 10^3}\)

v = 253.5 m/s

Therefore, the escape speed from the surface of the asteroid is approximately 253.5 m/s.

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Answer:I think it would be 0

Explanation:

Both are pushing with 100n therefore it will not move

Answer:

9600

Explanation:

Answer:

Hey... your answer is 9,600

Explanation:

Hope this helps :)

Here is prove just in case...

Best of luck <3

EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D

To calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.

The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.

For the low-energy lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)

≈ $18.47

For the conventional lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)

≈ $7.33

Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.

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Answer:

a teeter-toter, a car jack and a crowbar

Answer:

the answers are 3 seconds and 44.1 m

Answer:

44M

Explanation:

The given statement is false. The correct statement is, if the resisting forces are high, the chances of mass wasting are high because the gravitational force does not exceed the resisting force.

If the resisting forces are high, it means that there are strong forces opposing the movement or displacement of materials.

The gravitational force acting on the material may not exceed the resisting force, preventing the material from sliding or flowing downslope.

Therefore, the correct statement is: If the resisting forces are high, the chances of mass wasting are high because the gravitational force does not exceed the resisting force.

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In thermodynamics, heat and work are two ways in which energy can be transferred into or out of a system. The sign convention for heat and work is crucial in thermodynamics calculations.

When supplied to the system, heat is represented by the letter Q, which has a positive sign, and when released, a negative sign.

W stands for work, and it has a positive sign when the system performs work on the environment, and a negative sign when the environment performs work on the system.

Expansion work is the effort put forth by a system when it expands under a continuous external pressure.

A system's work when it grows is beneficial because energy is transmitted from the system to the surrounds and the system is working on its surroundings.

Contrarily, when the system is compressed, the environment works on it and energy is transferred from the environment to the system.

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a. the period of the oscillations is  0.285 seconds.

b. The maximum speed of the mass as it passes through the equilibrium position is 19.26 m/s.

T = 2π√(m/k)

where T=  period

m= mass

k= spring constant.

T = 2π√(0.820 kg / 2620 N/m)

T = 2π√(0.820 / 2620)

T =  0.285 seconds

b.

max speed = Aω

A =  amplitude

ω=  angular frequency.

ω = √(k/m)

ω = √(2620 N/m / 0.820 kg)

ω = √(3207.3 rad/s²)

ω =  56.64 rad/s

max speed   = 0.340 m × 56.64 rad/s

max speed  =  19.26 m/s

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To calculate the amount of potential energy initially stored in the spring, we need to consider the conservation of mechanical energy.

The mechanical energy of the block-spring system is conserved when no external forces other than gravity and friction are acting on it. At point A, the mechanical energy is stored entirely as potential energy in the compressed spring. The potential energy stored in the spring can be calculated using the formula: Potential Energy (PE) = (1/2)kx^2

where k is the spring constant and x is the displacement of the spring from its equilibrium position.

To find the spring constant, we need to know the force constant of the spring (k) or the spring's compression distance (x). Unfortunately, this information is not provided in the given question. If you have any additional information about the spring constant or the compression distance, please provide it so that I can assist you further.

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Answer:

C.

Explanation:

(a) The distance between you and the deer (you’re driving down the highway late one night at 20 m/s, when a deer steps onto the road 44 m in front of you) when you come to stop = 14 m.

(b) The maximum speed you could have and still not hit the deer = 25.80 m/s

The distance covered before to applying the brake = (20 x 0.5)

= 10 m

(v1² - v0²) = 2as

Where:

s = distance (m)

v = velocity

a = acceleration due to gravity (10 m/s²)

s = (0² - 20²) / (2 x 10)

= 20 m

(a) The distance between you and the deer:

44 - 30 = 14 m

So, the deer won't be struck by the car.

(b)

The maximum speed:

(v1² - v0²) = 2as

v1² = v0² - 2as

= (0² - (2 x (-10) x (44 - 0.5v0)

= 880 - 10 v0

v0 = 25.80 m/s

The question is incomplete, it should be:

You're driving down the highway late one night at 20 m/s when a deer steps onto the road 44 m in front of you. Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 10 m/s2.

Part A

How much distance is between you and the deer when you come to a stop?

Part B

What is the maximum speed you could have and still not hit the deer?

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Answer:

Area = 124.46

Explanation:

I HOPE THIS WAS HELPFUL

Answer:

Illusory correlation

Explanation:

Illusory correlation is a psychological phenomenon of sensing a correlation or relationship between a particular quantity and other variables however unrelated the two variables may be. A person may establish such connections, which are indeed false connections, as a result of over emphasis on novel incidents that are easily noticed due to them being salient

For example, when a waiter at a restaurant is being rude to a person after the person was made to walk under a ladder due to ongoing construction.

Cause: Human population grows worldwide.

Effect: Fossil fuels burn, cities become more industrialized, glaciers melt, climates change, and rain falls in unusual amounts.

Global warming refers to the long-term increase in Earth's average surface temperature, primarily due to the increasing levels of greenhouse gases, such as carbon dioxide, in the atmosphere. These gases trap heat from the sun, preventing it from radiating back into space and causing the Earth's temperature to rise.

Global warming has a range of potential impacts, including rising sea levels, more frequent and severe heat waves, changes in precipitation patterns, and more intense storms. It is considered one of the most significant and pressing environmental challenges facing the planet today.

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The vertical component of velocity here is 0.509 m/s. Then the vertical distance in 1 s is being 0.509 m. Then the potential energy is 174.5 J.

Potential energy of an object is generated by virtue of its position from a height h from the ground. It is related to the mass and gravity and the height h as follows:

p = mgh.

The velocity of the child = 6.5 m/s

vertical component of v = 6.5 sin 4.5° = 0.509 m/s

thus, vertical distance or height moved in 1 s  = 0.509 m

mass of the child = 35 kg

then potential energy p = 35 kg× 0.509 m/s × 9.8 m/s² = 174.5 J

Therefore, the potential energy being lost will be 174.5 J.

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The atom that is the most electronegative is fluorine (F).

Electronegativity, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

Electronegativity increases across the groups from left to right of the periodic table and decreases down the group.

Examples of electronegative elements arranged in decreasing order;

Thus,  the atom that is the most electronegative is fluorine (F).

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Answer:Because if the shape gets changed it will move faster without to much weight

Explanation:

The speed of the other object formed is 4.8 m/s.

The change in kinetic energy is 9.84 J.

Mass of the first object, m₁ = 3 u

Velocity of the first object, v₁ = 0.8 c

Mass of the second object, m₂ = 4 u

Velocity of the second object, v₂ = 0.6 c

Mass of the object at rest, m' = 6 u

a) According to the conservation of momentum,

m₁ + m₂ = m'+ m

So, m = (3 + 4) - 6

m = 7 - 6 = 1 u

m₁v₁ + m₂v₂ = (m x v) + (m' x v')

(3 x 0.8) + (4 x 0.6) + (1 x v) + (6 x 0)

Therefore, the speed of the other object formed is,

v = 2.4 + 2.4

v = 4.8 m/s

b) The change in kinetic energy is given by,

E = KE - (KE₁ + KE₂)

E = 1/2mv² - (1/2m₁v₁² + 1/2m₂v₂²)

E = 1/2(mv² - m₁v₁² - m₂v₂²)

E = 1/2[(1 x (4.8)² - 3 x (0.8)² - 4 x (0.6)²]

E = 1/2(23.04 - 1.92 - 1.44)

E = 1/2 x 19.68

E = 9.84 J

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In the case of the gearbox as the system, the outer surface temperature is 297 K, and the rate of entropy formation is 2.3*10⁻³ kW. A surface's temperature is its ambient temperature.

More specifically, it can be talking about: Surface temperature, the temperature of the air at the earth's Surface temperature. A state of disorder, randomness, or uncertainty are frequently associated with the scientific notion of entropy, which is also a quantifiable physical attribute. Since work is produced by ordered molecular motion, entropy also serves as a proxy for a system's molecular disorder or unpredictability.

Given,

Power = 59.32

Q = ha(Ta-Tb) (Ta-Tb)

Q = (0.171)((1.0)(347k) (347k)

Q = 2.3*10⁻³ kW

Therefore the rate entropy of the gearbox is 2.3*10⁻³ kW.

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Only it's volume changes. Volume is defined as the space an object takes up. The amount of substance, which is the mass stays the exact same. The amount of force that Earth is pulling the car down (the weight) stays the same.

Answer:

9266 feet

Explanation:

with Earth's gravity and long it fell that's as good as it gets if there was no other factors like wind mass weight but your welcome

This means that at the equator, the force of gravity on a body causes its velocity to increase at the rate of 9.78m/s per second because of acceleration of free fall cohesion.

An object that is falling freely is one that is only being affected by gravity. A free-falling object experiences a downward acceleration of 9.8 m/s/s (on Earth). This specific name is given to the numerical value for an object in free fall because it is such an essential value. The acceleration of any object moving solely as a result of gravity is referred to as the "acceleration of gravity."

This means that at the equator, the force of gravity on a body causes its velocity to increase at the rate of 9.78m/s per second because of acceleration of free fall cohesion.

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Answer:

Kinetic energy increase

Answer:

increases

Explanation:

Physicians who are in doubt about the relative merits of the treatments in a study are said to be uncertain or indecisive.

Physicians who are in doubt about the relative merits of the treatments in a study are said to be uncertain or undecided. This uncertainty may arise when they are comparing the effectiveness, safety, or other aspects of different treatments being studied. To resolve this uncertainty, they may further review research data, seek expert opinions, or wait for more evidence to become available.

Physicians operating in the outpatient setting typically help to manage long-term chronic conditions over extended periods of time, along with regular health maintenance.

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The cannonball executing projectile motion will be then accelerated downwards due to the gravitational attraction of earth.

Projectile motion is the motion under the only influence of gravitational force.

The cannonball shot from the cliff with certain velocity, will follow a projectile motion. If there is no gravity, the cannonball will continue its horizontal motion according to law of inertia.

But here, due to the gravitational attraction between the Earth and the ball, it will accelerate downwards.

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Answer:223.46 MJ

Explanation:

Given

The thermal conductivity of brick wall is \(k=1.16\ W/m.^{\circ}C\)

Cross-section of Wall \(A=5\m \times 7\ m\)

time period \(t=17.2\ h=17.2\times 60\times 60=61,920\ s\)

Inside temperature \(T_i=24^{\circ}C\)

Outside temperature \(T_o=8^{\circ}C\)

Heat transfer through the bricks

\(\dot{Q}=kA\dfrac{dT}{dx}\)

\(\dot{Q}=1.16\times 35\times \dfrac{16}{0.18}\\\\\dot{Q}=3608.88\ W\)

Heat flow for 17.2 h

\(Q=3608.88\times 61,920=223.46\ MJ\)

Answer:

stainless steel is the material which is non magnetic.

Answer:

White

Explanation:

Red comes from the lowest energy range of and blue from the highest.