A dart with a mass of 0.6 kg is thrown at 10.8 m/s and sticks into a 1.9 kg apple hanging
on a string. What is the velocity of the dart and apple just after the dart is embedded?

If you were standing 5 meters away from the cliff when you threw the keys, the total distance from the base of the cliff where you should look for the keys is 21.1 meters.

To find the distance from the base of the cliff where you should look for your keys, you can use the formula for the horizontal range of a projectile, which is:

range = (initial velocity * time of flight)^2 / (2 * acceleration due to gravity)

In this case, the initial velocity of the keys is 8.0 m/s (horizontally), the acceleration due to gravity is 9.8 m/s^2, and the time of flight can be calculated using the formula:

time of flight = (2 * initial velocity * sin(angle)) / acceleration due to gravit

Since the keys were thrown horizontally, the angle is 90 degrees, so the time of flight becomes:

time of flight = (2 * 8.0 m/s * sin(90)) / 9.8 m/s^2 = 1.63 seconds

Substituting these values into the formula for the horizontal range, we get:

range = (8.0 m/s * 1.63 s)^2 / (2 * 9.8 m/s^2) = 16.1 meters

This is the horizontal distance that the keys traveled during their time of flight. To find the distance from the base of the cliff where you should look for the keys, you need to add this distance to the horizontal distance you were from the cliff when you threw the keys.

For example, if you were standing 5 meters away from the cliff when you threw the keys, the total distance from the base of the cliff where you should look for the keys is 16.1 meters + 5 meters = 21.1 meters.

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The maximum speed that the car can have without losing contact with the road at the top of the hill of radius 50m is 22.14 m/s.

We need to apply the concept of centripetal force, force of gravity that produces the weight and the balance of these two, in order to solve this problem.

The force of weight must be equal to the centripetal force so that the weight must be equal to centripetal force.

∑ F = 0

Fc - Fw = 0

Fc = Fw

mg = mv²/r

where, m is mass

v is velocity

r is radius

Making v as subject, we have, v = √(g * R)

v = √(g * R) = √( 9.8 * 50) = 22.14 m/s

Thus, the velocity of the car that it can have without losing contact with the road is 22.14 m/s.

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Answer:

Minus the components

Explanation:

= minus components and figratives = answer 2 4

As it climbs yet another hill, the roller coaster slows down. Kinetic energy is converted into potential energy.

The gravitational potential energy (PE = mgh) of an object is the energy it has as a result of its height and is equal to the mass of the object times its height times the gravitational constant. The gravitational potential energy on a roller coaster is highest at the peak and lowest at the bottom. The roller coaster's potential energy is converted into kinetic energy as it travels down the hill at high speed. As it climbs yet another hill, the roller coaster slows down. Kinetic energy is converted to potential energy.

Potential energy is transformed into kinetic energy, which the roller coaster uses to go forward. Once it has around the first hill, it has all the kinetic energy it needs to complete the journey. Different wheel designs make for a comfortable ride once you're moving. Running wheels on the coaster guide it along the track.

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Designates a force and which is force multiplied by time. Impact designates a force while impulse is force multiplied by time.

Impact force is the force applied over a relatively brief period of time, whereas impulse is characterized in terms of the change in momentum of a body and depends on the force applied and the time period for which it is applied.

What connection exists between the impulse and the force of impact?

According to the equation, the impulse is equal to the average net external force times how long it takes for that force to act. It is equivalent to the momentum shift. A force's impact on an object is influenced by its strength, duration, and duration of action.

The term "impulse" is also used to refer to a fast-acting force or impact. This type of impulse is often idealized so that the change in momentum produced by the force happens with no change in time. Impulse of a force is defined as the product of the average force and the time interval for which the force acts on the body.

Its formula is the product of a body's mass and velocity times the time it takes. To put it another way, it is the proportion of kinetic energy that a body possesses to the distance that it travels.

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Answer:

Momentum is a physical quantity equal to the product of mass of the object and its velocity. Since velocity is a vector (a quantity that has both magnitude and direction), momentum is a vector quantity as well. According to the law of conservation of momentum, the momentum is always conserved.  This means that the initial momentum must be equal to the final momentum. Our initial momentum is zero since both, trolly and the girl on it are stationary. When the girl jumps, she has some velocity v. To compensate for that, the trolly will also move with some velocity v, but in the opposite direction so that the momentum stays conserved.

Explanation:

Sara pushed a box of lab equipment along the ground, displacing it by 1 meter. she has done work on the box of lab equipment.

When a force is applied and an object is moved over a specified distance, a work has been completed. The following formula is used to calculate an object's work,

W = Fd

Where, F is the applied force, and d is the object's displacement.

Therefore ,Sara has therefore completed her work on the box of lab equipment when she moves it by 1 m.

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The velocity of a golf ball that starts with a velocity of 10 m/s and slows at a constant rate of -0.5 m/s^2 after 2 seconds is 9m/s.

It is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame or reference and as measured by a particular standard time.

How to calculate the velocity of a golf ball after 2 seconds?
From the question given :
V₁ = 10 m/s

a = -0.5 m/s^2

Δt = 2 seconds

Now let's put it into the formula

a = ΔV / Δt

- 0.5 = V₂ - V₁ / 2 seconds

- 0.5 = V₂ - 10 / 2 seconds

-1 = V₂ - 10

V₂ = 9m/s

Therefore, the velocity of a golf ball after 2 seconds which slowing down at a constant rate of -0.5 m/s^2 is 9m/s.

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The potential energy won't change. if the individual raises the object above their heads.

Depending on an object's height and mass, it will have a different amount of gravitational potential energy. The amount of gravitational potential energy an object possesses increases with weight and height above the ground. The relationship between weight, height, and gravitational potential energy.

In short, potential energy is the energy that an object has stored because of its position in relation to a zero position. If an object is located at a height that is higher (or lower) than the zero height, it has gravitational potential energy.

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The energy source of quasars or active galaxies is currently thought to be matter falling toward a massive black hole in the center of a galaxy, according to persuasive evidence discovered by astronomers.

The definition of energy is "capacity to do activity, which is ability to apply force causing motion of an object." Energy is simply the force that moves objects, despite this definition's seeming complexity. Both potential and kinetic energy fall under this category.

Due to the fact that it is a fundamental human requirement, energy is crucial to our daily existence. Our constructions, which are constructed by humans, are heated and cooled by energy. Even the simplest tasks like lifting your finger or getting out of bed require energy.

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The velocity with which the block is travelling on the frictionless surface is 2.5 m/s.

The acceleration of the block is calculated by applying Newton's second law of motion as follows.

μ = F / N

where;

μ = F / N

μ = ma / mg

μ = a / g

a = μg

a = 0.19 x 9.8 m/s²

a = 1.86 m/s²

The time of motion of the block is calculated as follows;

t = √ ( 2h / g )

t = √ (2 x 8.6 / 9.8)

t = 1.33 s

The velocity with which the block is travelling on the frictionless surface is calculated as;

v = u + at

where;

v = 0 + (1.86)(1.33)

v = 2.5 m/s

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Answer:

so heating a magnet disrupts the domain walls and it becomes easy for the magnet to become ordinarily misaligned and rotate. so when that happens they are now less aligned and point in the opposite direction to the neighbors causing a decrease in the magnetic field and loss of magnetism

Landslides are caused by earthy elements moving from higher to lower areas as a result of gravity. The sliding down of a slope of a volume of rock, rubble, or earth is known as a landslide.

All things with mass, including our Earth, really bend and curve spacetime, which is what causes gravity to pull you toward the ground. What you experience as gravity is that curvature.

A mass attracts a mass; the amount of the gravitational force is direct proportion to the masses of both the two items and inverse to the square of both the distance between two pieces. Gravitational force is an electrostatic attraction and exists among the objects with mass.

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Answer:

Larger than mercury, venus, earth, mars, uranus, neptune

smaller than jupiter

95.60 watt much power is demonstrated by the lift.

Energy consumption per second is measured as power. The amount of force necessary to create a unit displacement is another way to quantify power. Power, a scalar quantity, is represented by the letter P. For instance, a light bulb with 100 W of electricity will provide more light than one with 10 W.

Given that,

weight (W) = 20 Kg

distance = 0.4 m

time (t) = 0.82 sec

As we know,

Power (P) = W/t

or, P = (20 kg × 9.8 × 0.4)/ 0.82

or, P = 95.60 watt

Thus, 95.60 watt much power is demonstrated by the lift.

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Answer: The greenhouse effect is caused by certain gases in the Earth's atmosphere trapping heat from the sun, which leads to climate change. Physics plays a role in understanding this phenomenon and developing solutions to mitigate its effects.

Explanation:

The relative velocity of the motorcycle, from the point of view of the passenger in the car, is of:

20 miles per hour.

The relative velocity between two objects is divided into two cases, as follows:

Then, for each case, the relative velocity is obtained as follows:

The velocities in this problem are given as follows:

The point of reference is the car, and they are travelling in the same direction, hence the relative velocity is obtained as follows:

80 - 60 = 20 miles per hour.

Which means that each hour, the motorcycle will get 20 miles farther than the car.

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The vestibular sense organ that would be registered is Brain.

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It will cost 0.324 Dollars to light six 100w light bulbs for six hours if the price of electrical energy is $0.09/ kwh.

kwh is commercial unit of electric energy. 1 unit= 1 kwh.

When 100 w power device is run for 1 hour, the amount of electrical energy consumed is 1 kwh.

We will find total units of electrical energy consumed in the given question.

energy consumed by 6 bulbs = 6×100= 600 w( joules per second).

The value in kwh is = 600÷1000

                                = 0.6kwh

Total energy consumed in 6 hours is = 0.6×6 = 3.6 kwh

So, the cost is = 3.6×0.09 = 0.324 dollars.

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yhhhhhhhhhhhhhhhhhhhhhhhhhhhhtAnswer:c

Explanation:k

k

When the gravitational forces on the object does not change then object will move in predictable ways.

When objects falls to the ground, then gravity causes them to accelerate. Acceleration is the change in velocity, and velocity is a measure of the speed and direction of motion. Gravity causes object to fall towards the ground at a faster velocity.

When the Earth's gravity is lost, all items held to the Earth's surface by the gravity would float away. That includes atmosphere, water, people, cars and animals. If object were secured strongly to the Earth, then it would probably remain attached.

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In clockwise direction the propellers rotate as seen from the rear of the plane. If the plane is flying horizontally and suddenly pulls upward, the nose of the plane would veer upward. The correct options are B and A respectively.

The propellers rotate anticlockwise when viewed from the back of the aircraft.

When observed from the rear, an anticlockwise rotation direction corresponds to propellers spinning in the forward direction because the angular momentum of the propellers points directly forward from the plane.

The nose of a plane tends to pull forward when a plane flying horizontally suddenly pulls upward. This is brought on by the direction of the lift force produced by the wings changing.

By raising the nose, the angle of attack widens, increasing the lift force that raises the plane's nose upward. The change in the aerodynamic forces exerted on the aircraft is what causes the nose to rise upward.

Thus, the correct options are B and A respectively.

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Your question seems incomplete, the probable complete question is:

The angular momentum of the propellers of a small airplane points directly forward from the plane. Part A In what direction do the propellers rotate as seen from the rear of the plane?

A. Clockwise

B. Counterclockwise

C. None of the above

Part B If the plane is flying horizontally and suddenly pulls upward, in which direction does the nose of the plane tend to move?

A. The nose of the plane would veer upward.

B. The nose of the plane would veer to the left.

C. The nose of the plane would veer downward.

D. The nose of the plane would veer to the right.

Answer:

refrigerators

door bells

magnetic compass

Water in liquid form has an entropy change of 63.4 J/K.

define entropy ?

A state of disorder, randomness, or uncertainty is most frequently associated with the scientific concept of entropy, which is also a quantifiable physical property. From classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, to the fundamentals of information theory, the term and concept are used in a variety of disciplines. It has wide-ranging uses in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, weather science, and information systems, including the transmission of information through telecommunication.

We use the equation to determine the entropy change for the same phase at various temperatures:

ΔS=n x Cp x In(T₂/T₁)

ΔS=3 x 75.38 x In (368/27)

ΔS= 63.4 J/k

therefore the entropy change of the water is  63.4J/k

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The change in the spring potential energy is calculated to be 0.05 Joules if the spring has a constant of 125 N/m.

The formula for the change in the spring potential energy can be given as;

String potential energy = distance of displacement × force

As the distance of displacement is 2 cm we convert it into meters as follows;

1 m = 100 cm

2 cm = 2 ÷ 100 m

2 cm = 0.02 m  

The force can be determined by using the following formula;

force = spring constant × displacement

force = 125 N/m × 0.02 m

force = 2.5 N

Now substituting the values of force and displacement in the equation for potential energy as follows;

String potential energy = 0.02 × 2.5

String potential energy = 0.05 Joules

Hence 0.05 Joules is determined to be the change in the spring potential energy.

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The ratio a/d is equal to 4.

The fourth minimum in the fringe pattern occurs when the optical path difference between the two slits is equal to four times the wavelength of light, or 4λ. The optical path difference is equal to the difference in distance covered by the light from the two slits to the minimum position.

For the first minima of the diffraction pattern, the optical path difference is equal to one width or a of the slit. Therefore the ratio a/d is equal to 4λ/a = 4.

Therefore if the centers of two slits whose width is a and are d distance apart,

the ratio a/d is equal to 4.

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Since a rotating comet is an isolated system, all of its mechanical energy (motion + potential) and angular momentum are conserved (constant).

Angular momentum is the quantity rotation of a body which is the product of its moment.

The angular momentum is given by,

L = mvr

where v= velocity of comet ,

r= distance of comet from sun ,

m= mass of comet,  

At position 1, r is smaller therefore v (speed) increases to keep the angular momentum constant, similarly at position r be comes large do the  speed v decreases again to keep the angular  momentum to the constant , therefore at position 1 speed of the and it  is greater than at 2. As speed is larger at 1 , therefore kinetic energy ( K=1/2mv² ) will also be greater at the  position 1 compared of   position 2 .

Now mechanical energy is the  same at both positions of  due to energy conservation law .

As mechanical energy is equal =KE+GPE , since it is  kinetic energy is greater at the  position 1 therefore GPE will be greater at position 2 .

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The most likely size of the particle is 10 mm

Point bars are formed as a result of silt deposition brought on by a decrease in water velocity inside the channel bend. Where there are low gradients and a mostly fine-grained load, meandering channels can emerge.

When a particle's velocity falls to the point that the water lacks the kinetic energy to carry it, sediment deposition occurs, causing the particle to fall out of suspension. Silt is a sediment that is bigger than clay but smaller than sand.

Given is a S curve

and in this graph we can see that when the speed of the water is 50 cm/sec in the x axis propotionatily the size of the particle is 10 mm in the y axis.

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