A climber throws a rope with a velocity of 3.0 m/s downward to another climber 4.0 m directly below. Conclude the rope’s velocity when it reached the lower climber? Assume no air resistance and that a = -g = -9.81 m/s2.

Aceleration refers to motion but gravity refers to force

Acceleration is change of velocity with time while gravity is the force of attraction pulling objects. When this force pulls an object it tends to move with a certain type of acceleration called acceleration due to gravity. This is equal to 9.8 m / s^2 for earth

Acceleration is the rate of change in velocity. While g is the acceleration due to gravity. The pace at which a body's velocity varies is represented by acceleration, which is a vector quantity.

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

\(\rm a = \frac{v-u}{t}\)

u is the initial speed

v is the final speed

t is the time interval

a is the acceleration of the ball

Gravitation is a natural law by which all things with all matter are attracted towards one another.

g is the acceleration due to gravity. whose value is equal to 9.81 m/sec².The value of the gravitational acceleration varies according to the height and the planet.

The value of the gravitational acceleration on the earth is 9.81 m/sec².While the value of g at the moon is 1.6333 m/sec².

Hence acceleration is the rate of change of velocity. While g is the acceleration due to gravity.

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Answer:

4.5V

Explanation:

In a arrangement of cells, the cells could be joined end to end(series) or to a common junction (parallel).

When cells are joined in series, the total emf of the cell is the sum of the individual emf of all the cells.

Hence;

Total emf = 1.5V + 1.5V + 1.5 V = 4.5 Volts

Answer:

MRI and Radio telescopes

MRI and radio telescopes would be unaffected by satellites that are not working properly.

The longest wavelengths in the electromagnetic spectrum are found in radio waves, which typically have frequencies of 300 gigahertz (GHz) and lower. The wavelength for 300 GHz is 1 mm, which is shorter than a grain of rice, while the wavelength for 30 Hz is 10,000 km (6,200 miles) (longer than the radius of the Earth).

Radio waves move at the speed of light in a vacuum, as do all electromagnetic waves, and at a nearly identical speed in the Earth's atmosphere.

Among the given options, space communication and television broadcasting television broadcasting and GPS  and  radio telescopes and space communication​ are affected by satellites that are not working properly because they are operated by satellite technology.

Hence, only MRI and radio telescopes would be unaffected by satellites that are not working properly.

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Answer:

1) writing homework

2) Helping homeless people

3) Teaching

Explanation:

1)You can finish your homework by your skill.

2)You can help homeless people buy your working skill.

3) You can teach people by your educative skill.

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An unknown sample's volume is 60 mL if its density is 2 g/mL and its mass is 120 g.

The volume of the ambiguous sample can be determined using the density formula:

Mass/Volume Equals Density

120 g/Volume x 2 g/mL

When we divide both sides by Volume, we obtain:

Capacity = 120 g 2 g/mL

Volume = 120 g / 2 g/mL is the result of dividing both sides by 2 g/mL = 60 mL in volume

Hence, the unknown sample has a 60 mL volume.

Every three-dimensional item takes up space in some way or the other. The volume of this area or of the object is what is used to describe it. The area or space occupied within an object's three-dimensional bounds is referred to as its volume. The object's capacity is another name for it.

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Given data:

* The mass of the student is m = 65 kg.

* The distance covered by the student is d = 100 m.

* The time taken by the student to cover the distance is t = 12 seconds.

Solution:

(a). The velocity of the student is,

Thus, the velocity of the student is 8.33 meters per second.

(b). The kinetic energy of the student is,

Thus, the kinetic energy of the student is 2255.14 J.

(c). The mechanical energy of the student is the energy acquired by the student during its motion.

Thus, the mechanical energy of the student is 2255.14 J.

The ring exerts a force on the rider at the top of the ride, which is equal to the gravitational force on the rider and is approximately 579.39 N.

The force with which the ring pushes on the rider at the top of the ride is equal to the normal force exerted by the ring on the rider, which is also equal to the gravitational force on the rider. The gravitational force on the rider can be calculated using the formula F = mg, where m is the mass of the rider and g is the acceleration due to gravity. Therefore, the force is approximately 579.39 N. At the top of the ride, the net force acting on the rider is zero, so the normal force exerted by the ring must be equal and opposite to the gravitational force. Without knowing the radius of the ring, we cannot calculate the velocity of the rider or the centripetal force. However, if the radius of the ring is very large compared to the size of the rider, then the centripetal force will be negligible, and the normal force will be approximately equal to the gravitational force.

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Answer:

The friend has more kinetic energy

Explanation:

This person is going faster than the other.

Answer:

pressure - A

Friction-E

Force-B

Weight-C

Fluid-D

Explanation: I just remember my vocab words and i had those

When a spacecraft operates outside the Earth's atmosphere without its main sources of fuel, it relies on other propulsion systems that do not require atmospheric oxygen or combustion. One of the most common propulsion systems used in space is rocket propulsion. Rockets operate based on the principle of action and reaction, following Newton's third law of motion. They expel high-velocity exhaust gases in one direction, which generates an equal and opposite force that propels the spacecraft forward.

In space, where there is no air or atmosphere, rockets can use different types of propellants, such as liquid or solid fuels, which can be stored onboard the spacecraft. These fuels undergo a chemical reaction, resulting in the expulsion of hot gases. The expelled gases create a thrust force that propels the spacecraft in the opposite direction.

To control the spacecraft's movement and direction, it uses small thrusters or engines that can be fired in different combinations. By firing these thrusters, the spacecraft can change its trajectory, adjust its orbit, or perform maneuvers in space.

Additionally, spacecraft can harness other sources of energy for various operations. Solar panels are often used to generate electrical power from sunlight. This power is then used for onboard systems, such as communication, navigation, scientific instruments, and life support systems.

In summary, when a spacecraft operates outside the Earth's atmosphere without its main sources of fuel, it relies on rocket propulsion and other systems to maneuver and perform its intended tasks in space.

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The car that travels to the proper with a speed of 42 m/s, skids 84 meters for 4 seconds before it involves a stop.

Solving :

The distance traveled by car before coming to a stop can be calculated with the following equation:

                        \(v^{2} f_{} =v^{2} i_{} + 2ad\)

Where:

\(v_{f}\): is that the final speed = 0 (it stops)

\(v_{i}\): is that the initial speed = 42 m/s

a: is that the acceleration

d: is that the distance =?

We need to find the acceleration. we will use the next equation:

                       \(v_{f} = v_{i} +at\)  ...........2

Where:

t: is that the time = 4.0 s

Hence, the acceleration is:

                  a = \(\frac{v_{f} -v_{i} }{t}\)

                 a = \(\frac{0-42m/s}{4.0s}\)

                 a = - 10.5 m/s²

Now, the car skid the subsequent meters before coming to a stop (eq 1).

                             d = \(\frac{v^{2}_{f} - v^{2} _{f} }{2a}\)

                           d = 84 m

Therefore, the car skids 84 meters before coming to a stop.

Constant acceleration :

Constant acceleration refers to motion where the speed increases by the identical amount each second. the foremost notable and important example is free fall. When an object is thrown or dropped, it experiences a continuing acceleration due to gravity, which features a constant value of approximately 10 meters per second squared

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Using the concepts of momentum, we got that 150i-60j is the momentum vector and 162.3Kg-m/sec is the magnitude of the momentum of a 30 kg object.

We know very well that momentum is given by the product of mass and velocity of the object.

In other words P=M. v

But, here velocity is given in 2-D form, means momentum is possible in two different directions.

Therefore, for momentum we just need to multiply the mass of the object with velocity

=>Momentum of the object=M×(5i-2j)

=>                                       p=30×(5i-2j)

=>                                       p=150i-60j

Now, talking about the magnitude we know that magnitude is given by

√(x-component)² + (y-component)²

Therefore, magnitude of momentum (|p|)=√(150)²+(--60)²

=>                                                     |p|=√22500+3600

=>                                                     |p|=√26100

=>                                                     |p|=162.3Kg-m/sec

Hence, for  30 kg object is moving along with the velocity given, the momentum vector is 150i-60j, as well as the magnitude of the momentum for v=5i-2j is 162.3kg-m/sec.

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The magnitude of its total momentum after the collision is 124.8 kg-m/sec.

The definition of momentum is the quality that a moving body possesses due to its mass and motion, and it is determined by multiplying the body's mass by its speed.

Given that the x-momentum of an object is 8.0 × 103 kilogram meters/second, and its y-momentum is 1.2 × 104-kilogram meters/second the resultant momentum after collision is 124.8 kg-m/sec.

The magnitude of its total momentum after the collision is 124.8 kg-m/sec.

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Answer:

It reveals that light is a wave

Explanation:

Diffraction is the property of a wave in which there is a bending of the wave about the corners of an obstacle or aperture into the geometrical shadow of the obstacle or aperture.

This simply implies that a wave bends or spreads out when it passes through openings. Since the light diffracts through small slits and diffraction has been shown to occur in water waves and sound waves, this property of diffraction can only be characteristic of a wave and thus, this evidence reveals that light is a wave.

Answer:

It shows that light can travel in different wavelengths.

Explanation:

Light is similar to a wave in the way that it travels in a straight line, but when it is passing through the slits, it diffracts due to this difference. Therefore, light refracts in the same way as a wave would, and it is a mode of transferring energy. The light travels in a way similar to a wave

They are free electrons that can be used by any atom.

ok, i will try to explain this the best i can.

Okay, so we know that in the first shell there are 2 electrons. Only 2 electrons can fit into the first shell.

Then we have the second shell which can fit only 8 electrons.

Then, lets say we have a third shell. The third has one electron in the valence shell. The ion is "unhappy/unbalanced". We need to remove that electron to make the ion balance. So we need to remove that one electron and transfer it to another ion to make that ion "happy/balanced".

hope this helps you understand.

Answer:

The North Pole.

Explanation:

According to the Lenz's law of electromagnetic induction, an induced elemagnetic force tends to give rise to the current. In reaction, this current's magnetic field try to oppose any replacement in the magnetic flux.

So,  as per the law of Lenz's electromagnetic induction, when the current passes in a coil in anti-clockwise direction, this will produce the opposite end of the coil in the north pole.

So, the correct answer is north pole.

Answer:

20 molcues

Explanation:

10 minutes on the stove, the water molecules in the pot are in two different states , the two different states are the liquid state and the gaseous state.

Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma .

These different states of matter have different characteristics according to which they vary their volume and shape .

As given in the problem 10 minutes on the stove , the water molecules in the pot are in two different states , the two different states are liquid state and the gaseous state ,

The gaseous state of the water molecules has higher energy and then motion as compared to the liquid state of the water molecule .

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Answer:

space; matter

Explanation:

Like for example, your water bottle takes up space so it is called matter!

Hope this helps!

Answer:

h=103.528m

Explanation:

I have explained everything in the attached photo. make sure to ask me questions if you don't understand any part.

Answer:

definition of matter is that matter takes up space and has mass

Answer:

1) Acids have a sour taste , Bases have a bitter taste.

2) Acids turn blue litmus paper into red , Bases turn red litmus paper into blue.

3) Acids react with most metals to form Hydrogen gas but only a few base react with a few metals to form Hydrogen gas

4) Both will conduct electricity. Both acids & bases are good electrolytes. Strong acids & bases conduct more electricity than that of weak acids & bases

Fill in the blanks with the properties of acids and bases as follows:

The properties of acids are as follows:

Therefore, fill in the blanks with the properties of acids and bases are well described above.

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In Science, altitude refers to: D. the angular height away from the horizon.

Altitude is also referred to as an elevation and it can be defined as the vertical distance (height) above a natural satellite or the surface of a planet such as land or sea level.

This ultimately implies that, an altitude is vertical height (elevation) of an object or physical body above a particular location or planetary reference plane such as land or sea level on Earth.

In conclusion, altitude is the angular height of an object or physical body away from the horizon.

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This soccer technology fair challenge serves to acquaint college students with simple records of how the quantity of air in a football ball can have an effect on the distance it travels while kicked with the regular force.

Velocity / (vɪˈlɒsɪtɪ) / noun plural ties the pace of movement, motion, or operation rapidity; swiftness. physics is a degree of the charge of the movement of a frame expressed as the price of alternate of its role in a specific route with time.

Now that the variety of projectile is given by R = u 2 sin ⁡ 2 θ g, while could be most for a given preliminary speed velocity is the directional velocity of an item in movement as a demonstration of its fee of change in position as observed from a particular body of reference and as measured by using a specific trendy of time.

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Answer:m1v1 + m2v2 = (m1f + m2f)vf. 3000kg(10.0m/s) + (15000kg)(0.0m/s) = (18000kg)(vf).

Explanation:

The cost to cook a chicken for 1 hour in the given oven is 264 fils. Option A: 264 Fils. Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light. In brief, voltage = pressure, and it is measured in volts (V).

To calculate the cost of cooking a chicken for 1 hour in the given oven, we need to determine the total energy consumed by the oven during that time and then calculate the cost based on the electric company's charge.

The power consumed by the oven can be calculated using the formula:

Power (P) = Voltage (V) x Current (I)

Given:

Voltage (V) = 220 Volts

Current (I) = 20 Amperes

Using the values, we can calculate the power consumed by the oven:

P = 220 V x 20 A

P = 4400 Watts

To calculate the energy consumed, we need to convert the power from Watts to kilowatts and then multiply it by the time in hours:

Energy (E) = Power (P) x Time (t)

Given:

Time (t) = 1 hour

Converting the power from Watts to kilowatts:

Power (P) = 4400 Watts = 4.4 kilowatts

Calculating the energy consumed:

E = 4.4 kW x 1 hour

E = 4.4 kilowatt-hours (kWh)

Now we can calculate the cost using the electric company's charge:

Cost = Energy (E) x Cost per kWh

Given:

Cost per kWh = 60 fils

Calculating the cost:

Cost = 4.4 kWh x 60 fils/kWh

Cost = 264 fils

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Answer: B

Explanation: it is perpendicular to a surface

Answer:

it is perpendicular to a surface

Explanation:

Answer: false

Explanation:

Nitrogen is actually the most abundant gas in the atmosphere.

The answer to the question is false. Hope this helps you!

Answer:

false.

Explanation:

The most abundant gas in the Earth's atmosphere is nitrogen.

Answer:

B

Explanation: