someone PLEASE help me with this i need it so bad

ANSWER:

A. F > 48.02 N

B. F < 48.02 N

C. F = 48.02 N

STEP-BY-STEP EXPLANATION:

Given:

Mass (m) = 7 kg

µ = 0.7

Balancing horizontal forces:

A. The block is speeding up

It means the block is having a positive value of acceleration:

B. The block is slowing down

C. The block is moving at a constant speed

The point through which this ray will pass, after refraction by the lens is point D.

The refraction of light refers to the bending or change in direction that occurs when light passes from one medium to another. It is a phenomenon that happens due to the difference in the speed of light in different substances.

From the ray diagram given, after the light incident from point O, it will pass the converging at point D which is the focal length of the lens after refraction.

Thus, based on the converging lens given in the ray diagram, we can conclude that, the point through which this ray will pass, after refraction by the lens is point D.

So point D is the correct answer.

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The absolute pressure at an ocean depth of 1.0 x 10^3 m is 1.002 x 10^8 Pa.

Hydrostatic pressure is the pressure that a fluid exerts on a surface due to the weight of the fluid above it. It is the result of the force of gravity acting on a column of fluid, and it is directly proportional to the height of the column of fluid and the density of the fluid.

The absolute pressure at an ocean depth of 1.0 x 10^3 m can be calculated using the hydrostatic pressure equation:

P = ρgh + Po

where:

P is the absolute pressure at the given depth

ρ is the density of the water

g is the acceleration due to gravity (assumed to be 9.81 m/s²)

h is the depth of the ocean

Po is the atmospheric pressure at the surface (assumed to be 1.01 x 10^5 Pa)

Substituting the given values, we get:

P = (1.025 x 10^3 kg/m³) x (9.81 m/s²) x (1.0 x 10^3 m) + 1.01 x 10^5 Pa

P = 1.025 x 9.81 x 10^6 Pa + 1.01 x 10^5 Pa

P = 1.002 x 10^8 Pa.

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The mass of the cold water, given the data from the question is 500 g

Heat loss = Heat gain

MᵥᵥC(Tᵥᵥ – Tₑ) = M꜀C(Tₑ – T꜀)

200 × 4.184 (75 – 25) = M꜀ × 4.184(25 – 5)

41840 = M꜀ × 83.68

Divide both side 83.68

M꜀ = 41840 / 83.68

M꜀ = 500 g

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Answer:

the substitute bride is a good girl who knows

Answer:

0.872m/s

Explanation:

Tangential velocity is given by the formula,

\(v= 2\pi r/ t\)

In the question given,

radius= 25meters

time= 180secs

pie= 3.14

number of laps= 1

The magnitude of tangential velocity equals;

\(\frac{1lap* 2 *3.14 *25m}{180secs}\)

v = 157m/180secs

Therefore, the magnitude of the tangential velocity

=0.872m/secs

Answer:

Mass = 56.83 Kg

Explanation:

\(PE = mgh\\9094 J = 16m*10 m/s^2*mass\\mass = \frac{PE}{g*h} \\mass = \frac{9094 J}{16*10} = 56.83 kg\)

If the cells are in parallel, they form a battery of 1.5V with the ability to deliver 4 times as much current as one cell can.

If the cells are in series, they form a battery of 6.0V.

The Enron scandal drew attention to accounting and corporate fraud as its shareholders lost $74 billion in the four years leading up to its bankruptcy, and its employees lost billions in pension benefits.

Enron's Board of Directors failed to fulfil its fiduciary duties towards the corporation's shareholders. Secondly, the top executives of Enron were greedy and acted in their own self-interest.

Enron's downfall was attributed to its reckless use of derivatives and special purpose entities. By hedging its risks with special purpose entities which it owned, Enron retained the risks associated with the transactions. This arrangement had Enron implementing hedges with itself.

Enron raised fundamental issues about corporate fraud, accounting transparency, and investor protection.

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Answer:

Applications of Flywheels

in wind turbines.

along with motor driven generator to store energy.

in automobile engines.

in electric cars to boost speed (in experimental stage)

In advanced locomotive propulsion systems.

In advanced technology transit buses.

In satellites to control direction.

Answer:

Hello i hope this helps you! Potential and Kinetic EnergyHold the car at the top of the ramp, and release to demonstrate the two main kinds of energy. Potential energy is placed into the car when it's lifted from the floor, and that energy is released as the car rolls down the ramp.

Explanation:

hope this helps

Answer: 34 km, 21 km  61 degrees north of east

Explanation: distance = 13 + 3 + 18 = 34

   displacement = 13 - 3 = 10

               10^2 + 18^2 = 424

              find the square root of 424 ( 20.5 rounded to 21 )

The total distance walked is 34 km and the resulting displacement is 20.6 km.

a) The total distance is gotten by summing up all the distance.

Total distance = Distance moved east + distance moved north + distance moved west

Total distance = 13 km + 18 km + 3 km = 34 km

b) The displacement is the distance from the beginning point to end point.

Displacement² = 18² + (13 - 3)² = 18² + 10²

Displacement² = 424

Displacement = 20.6 km

Therefore the total distance walked is 34 km and the resulting displacement is 20.6 km.

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Answer:

A, the objects velocity

Explanation:

Answer:

Explanation:

Carton cycle consists of four thermodynamic processes . The first is isothermal expansion at higher temperature , then adiabatic expansion which lowers the temperature of gas . The third process is isothermal compression at lower temperature and the last process is adiabatic compression which increases the temperature of the gas to its original temperature .

So the given process of isothermal compression must have been done at the temperature of 300K  , keeping the temperature constant .

Work done on gas at isothermal compression is equal to heat transfer .

work done on gas = 80 x 10³ J

work done on gas = n RT ln v₁ / v₂

n is number of moles v₁ and v₂ are initial and final volume

molecular weight of gas = 28.97 g

1.5 kg = 1500 / 28.97 moles

= 51.77 moles

work done on gas = n RT ln v₁ / v₂

Putting the values in the equation above

80 x 10³ = 51.78 x 8.31 x 300 x ln v₁ / .2

ln v₁ / .2 = .62

v₁ / .2 = 1.8589

v₁ = 0.37 m³

i. \(T = 36.8\:\text{N}\)

ii. \(a = 2.45\:\text{m/s}^2\)

iii. \(x = 1.23\:\text{m}\)

Explanation:

Let's write Newton's 2nd law for each object. We will use the sign convention assigned for each as indicated in the figure. Let T be the tension on the string and assume that the string is inextensible so that the two tensions on the strings are equal. Also, let a be the acceleration of the two masses. And \(m_1 = 3\:\text{kg}\) and \(m_2 = 5\:\text{kg}\)

Forces acting on m1:

\(T - m_1g = m_1a\:\:\:\:\:\:\:(1)\)

Forces acting on m2:

\(m_2g - T = m_2a\:\:\:\:\:\:\:(2)\)

Combining Eqn(1) and Eqn(2) together, the tensions will cancel out, giving us

\(m_2g - m_1g = m_2a + m_1a\)

or

\((m_2 - m_1)g = (m2 + m_1)a\)

Solving for a,

\(a = \left(\dfrac{m_2 - m_1}{m_2 + m_1}\right)g\)

\(\:\:\:\:= \left(\dfrac{5\:\text{kg} - 3\:\text{kg}}{5\:\text{kg} + 3\:\text{kg}}\right)(9.8\:\text{m/s}^2)\)

\(\:\:\:\:= 2.45\:\text{m/s}^2\)

We can solve for the tension by using this value of acceleration on either Eqn(1) or Eqn(2). Let's use Eqn(1).

\(T - (3\:\text{kg})(9.8\:\text{m/s}^2) = (3\:\text{kg})(2.45\:\text{m/s}^2)\)

\(T = (3\:\text{kg})(9.8\:\text{m/s}^2) + (3\:\text{kg})(2.45\:\text{m/s}^2)\)

\(\:\:\:\:= 29.4\:\text{m/s}^2 + 7.35\:\text{m/s}^2 = 36.8\:\text{N}\)

Assuming that the two objects start from rest, the distance that they travel after one second is given by

\(x = \frac{1}{2}at^2 = \frac{1}{2}(2.45\:\text{m/s}^2)(1\:\text{s})^2 = 1.23\:\text{m}\)

A ladder is leaned against a wall. The wall has friction but the floor is frictionless. It should be noted that the ladder cannot be in static equilibrium

In order for the ladder to be in static equilibrium, the net force acting on it must be zero. However, in this case, there will be a horizontal force exerted by the wall on the ladder due to friction, which will create a torque about the base of the ladder.

When a ladder is leaned against a wall, it exerts a force on the wall called the normal force, which is perpendicular to the surface of the wall. In order for the ladder to be in equilibrium, the normal force must balance the weight of the ladder and any objects on it. This torque will cause the ladder to rotate and hence, it cannot be in static equilibrium.

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Answer:

Explanation:

T = 10(60)/500 = 1.2 s

f = 1/T = 0.83 Hz

Answer:

I think it might be (a) if that helps

Answer:

the boy would go missing

Answer: Slender man converts the boy to christianity

Answer:

The friction force exerted by the surface is 490 newtons.

Explanation:

From Physics, we remember that static friction force (\(f_{s}\)), measured in newtons, for a particle on a horizontal surface is represented by the following inequation:

\(f_{s} \leq \mu_{s}\cdot m \cdot g\) (Eq. 1)

Where:

\(\mu_{s}\) - Static coefficient of friction, dimensionless.

\(m\) - Mass of the crate, measured in kilograms.

\(g\) - Gravitational acceleration, measured in meters per square second.

If \(f_{s} = \mu_{s}\cdot m \cdot g\), then crate will experiment an imminent motion. The maximum static friction force is:  (\(\mu_{s} = 0.6\), \(m = 100\,kg\), \(g = 9.807\,\frac{m}{s^{2}}\))

\(f_{s} = (0.6)\cdot (100\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\)

\(f_{s} = 588.42\,N\)

From Newton's Laws we get that current force of friction as reaction to the pulling force done by the worker on the crate is:

\(\Sigma F = F-f = 0\)

\(f = F\) (Eq. 2)

Where:

\(F\) - Horizontal force done by the worker, measured in newtons.

\(f\) - Static friction force, measured in newtons.

If \(F = 490\,N\), then the static friction force exerted by the surface is:

\(f = 490\,N\)

Given that \(f < f_{s}\), the crate does not change its state of motion. The friction force exerted by the surface is 490 newtons.  

Yes, yes it does. It's cool right?

The first step towards a bill becoming a law is for the bill to be introduced in Congress.

Next, the bill goes to a committee to be marked up, dropped, or sent to the floor.

After that, the bill is debated on the floor and can pass with a majority vote of the house that sponsored it.

In the next stage, the bill must go to the other chamber, to repeat the process.

After the bill is resolved in the conference committee, it goes to the president.

The Congress is sometimes referred to as Senate and it can be defined as a deliberative assembly or council of elected citizens found in the upper chamber or house of a bicameral legislature.

This ultimately implies that, Congress is a federal legislative arm of government of the United States of America, which is saddled with the responsibility of enacting and passing federal laws and bills for the citizens, with the steps enumerated above.

Generally speaking, the first step of making bill to become a law is introducing it to the Congress while the last step is the resolution of a bill if it is voted in favor by at least 44 senators, and then it finally goes to the president for assent through his or her signature.

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Complete Question:

Use the drop down menus to complete the sentences.

The first step in a bill becoming a law is for the bill to be _____.

Next the bill goes to _____ to be marked up, dropped or sent to the floor.

After that, the bill is debated on the floor and can pass on a majority vote of ____.

In the next stage, the bill must go to the ____ to repeat the process.

After the bill is resolved in the ____, it goes to the president.

Answer:

i believe the answer is B only because i looked it up on g00gle so take what i say with a GRAIN of salt all puns intended

Explanation:

The primary means by which heat is transferred through fluids is convection currents (option D).

Convection is the transmission of heat in a fluid by the circulation of currents.

Heat can be transferred by different methods depending on the medium. Fluids like gases and liquids transfer heat through the process of convection.

Therefore, the primary means by which heat is transferred through fluids is convection currents.

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Answer:

The correct answer is d.

Theories are constructed after there is numerous data collected during the experiment.

Explanation:

hope it helps

Answer:

The correct answer is "1080 W".

Explanation:

Given:

Current,

I = 9.0 A

Potential difference,

V = 120 volt

As we know,

⇒ \(Power=IV\)

On substituting the values, we get

⇒             \(=120\times 9.0\)

⇒             \(=1080 \ W\)

Answer:

:-)}:‑)B-):-\:-*:'(:-|:‑X;-):-*:-\:-*