a tanker discharges a jet of water horizontally backwards with a velocity of 4,8 m/s. if the rate of discharge is 85 dm3/s, what force is required to keep the tanker at rest?

Answer:

Remember the equation:

F = m*a

where F is force, m is mass and a is acceleration.

If we have F constant. and we want that increases, then we can have the case where m decreases.

The mass can decrease in cases like a rocket, where as the fuel of the rocket consumes, the mass of the rocket decreases and the acceleration increases.

b) The cases where a constant force results in a constant acceleration of zero, is when the force is canceled, an example of this is the constant force of the gravity in all the objects. The objects that are in the ground are being affected by this force, but the gravitational force is canceled with the normal force of the ground. Then we have a constant force that does not cause any acceleration.

Answer:

the catcher and outfielder

Explanation:

Answer: The catcher and the player at first base are the only players permitted to wear mitts rather than gloves. So, the answer would be 3.

Explanation: I had this on a quiz and got it right.

Hope this helps!

Answer:

1 = The answers are 6, 60, 600, or 6

Explanation:

As a result, 6.25 x 10¹⁸ electrons travel through a wire at a rate of 1 A per second.

Electrical current is what we typically refer to as electron flow. Direct Current (DC) and Alternating Current (AC) are the two types of electron flow that are most familiar to us. When electrons only go in one direction, we experience direct current, which is the type of electrical flow we obtain from batteries and solar cells. Because electrons have a negative charge, they are drawn to positive battery ends and repelled by negative ones. Q=Ne where N= number of electrons

Current=I= tQ= tNe

​⟹I= 2*10×10 19×1.6×10 −¹⁹

= 6.25* 10¹⁸

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Answer:

Strongest

Explanation:

Weak forces do not possess significant strength to pull an object. Net forces is the sum of all forces acting on an object. Balanced forces cancel each other out to have no pull whatsoever. S

Answer:

Explanation: heat of fusion

The moon of Jupiter, Ganymede is the largest moon in the solar system. The mass of Jupiter when the orbital period and the distance from the centre of the orbit are given is calculated to be 1.57 × 10²⁷ kg.

The time required to complete one revolution in an orbit around the planet is known as the Orbital Time period of motion. The orbital distance's cube is directly proportional to the square of the time period.

Given that,

Orbital distance R = 1.07 × 10⁹ m

Time period T = 6.18 × 10⁵ s

We know the formula of time period as,

T² = 4 π² R³/ G M

where, M is the mass of Jupiter

G is the gravitational constant

(6.18 × 10⁵)² = 4 π² (1.07 × 10⁹)³/(6.67 × 10⁻¹¹) M

Making M as subject, we have,

M = 4 π² (1.07 × 10⁹)³/[ (6.67 × 10⁻¹¹) (6.18 × 10⁵)²] = 1.57 × 10²⁷ kg

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The kinetic energy of the object will have decreased if the net work done by the forces: Zero.

Kinetic energy is the strength an item has due to its motion. If we want to accelerate an item, then we have to practice a force. applying pressure calls for us to do paintings. After paintings have been finished, power has been transferred to the item, and the object may be shifting at a new constant pace.

Solution:-

a) Arm wore energy theorem,

WwW = AE

Sy if AKEDO, WO

Now, the correct option is: achn4 on the project is positive

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Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

Steve's negligence in leaving the truck's motor running in neutral and forgetting to set the parking brake resulted in a series of events that caused the truck to crash into a gas station pump.

Steve, a driver for QRI, made a careless mistake while making a delivery. He left the truck's motor running in neutral and forgot to set the parking brake. As a result, the truck rolled and crashed into a nearby gas station pump. This caused a fire to ignite, which spread quickly to a construction site a block away.

There are several factors at play here that contributed to the chain of events. First, leaving the truck's motor running in neutral allowed it to move freely without any control. Second, forgetting to set the parking brake meant there was no additional mechanism to keep the truck stationary.

The collision with the pump caused a rupture, resulting in a fuel leak. The ignition source, possibly a spark or heat from the impact, ignited the fuel and started a fire.

The fire then spread to the nearby construction site. Construction sites often contain materials that are combustible, such as wood, paint, or fuel. The proximity of these materials to the gas station allowed the fire to easily extend to the construction site.

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Increasing human population have advanced the problem of the impact of humans on the environment as shown above.

We know that the environment has to do with our natural surroundings. The environment has to do  with that space that is around us from which we obtain the materials and energy that are necessary to support life.

We know that the greatest pressure that is placed on the environment and the resources that is in it comes from anthropogenic activities. These are the activities of the people that live within the environment. The extraction of resources for the provision of energy as well as construction pts great pressure on the environment

As we look at the image, we call to mind that the the explosions in the population of human beings have put more pressure on the environment and thus made it unable to support the human population.

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An electromagnet is made when when current is passed through a coil of

wire wrapped around an iron nail. The nail becomes magnetic and able to

pick up metallic objects.

The principle can be used to create an electric motor motor by forming a

current carrying coil into which is attached a movable core that is attached

to a spring.

Based on the arrangement, when a current flows in the coil, the movable

core, known as the armature, is pulled into the the coil and when the

current is switched off the spring pushes the armature out again.

The mechanical energy of the motion of the armature can be used to put

switches on or off, and to open and close valves.

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Answer:

The question is incomplete:

Q = M * C * change in temperature

Q = 1000 cm^3 * 1 cal / (cm^3 * deg C) * 10 deg C

Q = 10,000 calories

Calcium Bromide, commonly known as calcium dibromide, is an ionic compound since the second element is a nonmetal, resulting in an ionic compound. It is referred to as a hydrated salt.

A chemical compound is a material made up of several similar molecules that include atoms from more than one chemical element and are kept together by chemical bonds. A molecule made up of only one element's atoms is hence not a compound.

A solution is a form of homogenous combination made of two or more components in chemistry. A solute in such a combination is a material that has been dissolved in another substance known as a solvent.

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Answer:

zero

Explanation:

The linear momentum is conserved when the system is closed. Therefore, the net force is zero.

Answer:

A weed is a plant considered undesirable in a particular situation, "a plant in the wrong place". Examples commonly are plants unwanted in human-controlled settings, such as farm fields, gardens, lawns, and parks

Answer:

4000 kg m/s

Explanation:

p=mv

substitute values into the formula above to get:

p=1000x4

p=4000 kg m/s

Answer:   We can solve this problem by using the principle of moments. The principle of moments states that the sum of the moments of all the forces acting on an object must be zero if the object is in equilibrium.

In this case, we can consider the teeter-totter as a rigid object that is rotating around a pivot point. The weight of the child is acting downwards, and the force we need to find is acting upwards. The pivot point is the point where the teeter-totter is rotating, so we can consider this point as the fulcrum of a lever.

To find the minimum force needed to make the child lift off the ground, we need to find the point where the weight of the child and the force acting upwards produce a moment of zero.

Let's first calculate the moment produced by the weight of the child:

M_child = F_child x d_child

where F_child is the weight of the child, and d_child is the distance from the child to the pivot.

F_child = m_child x g = 15 kg x 9.8 m/s^2 = 147 N

d_child = 1.5 m

M_child = 147 N x 1.5 m = 220.5 Nm

To produce a moment of zero, the force we need to find must be placed at a distance of:

d_force = M_child / F_force

where F_force is the force we need to find.

d_force = 220.5 Nm / F_force

Now, we know that the distance from the force to the pivot is 0.30 m, so we can set up an equation using the principle of moments:

M_child + M_force = 0

F_child x d_child + F_force x d_force = 0

Substituting the expressions for M_child and d_force, we get:

147 N x 1.5 m + F_force x (220.5 Nm / F_force + 0.30 m) = 0

Simplifying and solving for F_force, we get:

F_force = 147 N x 1.5 m / (0.30 m - 220.5 Nm / (147 N)) = 441 N

Therefore, the minimum force needed to make the child lift off the ground is 441 N.

Explanation: hpe this helps :D

Answer:

Explanation:We can solve this problem by using the principle of moments. The principle of moments states that the sum of the moments of all the forces acting on an object must be zero if the object is in equilibrium.

In this case, we can consider the teeter-totter as a rigid object that is rotating around a pivot point. The weight of the child is acting downwards, and the force we need to find is acting upwards. The pivot point is the point where the teeter-totter is rotating, so we can consider this point as the fulcrum of a lever.

To find the minimum force needed to make the child lift off the ground, we need to find the point where the weight of the child and the force acting upwards produce a moment of zero.

Let's first calculate the moment produced by the weight of the child:

M_child = F_child x d_child

where F_child is the weight of the child, and d_child is the distance from the child to the pivot.

F_child = m_child x g = 15 kg x 9.8 m/s^2 = 147 N

d_child = 1.5 m

M_child = 147 N x 1.5 m = 220.5 Nm

To produce a moment of zero, the force we need to find must be placed at a distance of:

d_force = M_child / F_force

where F_force is the force we need to find.

d_force = 220.5 Nm / F_force

Now, we know that the distance from the force to the pivot is 0.30 m, so we can set up an equation using the principle of moments:

M_child + M_force = 0

F_child x d_child + F_force x d_force = 0

Substituting the expressions for M_child and d_force, we get:

147 N x 1.5 m + F_force x (220.5 Nm / F_force + 0.30 m) = 0

Simplifying and solving for F_force, we get:

F_force = 147 N x 1.5 m / (0.30 m - 220.5 Nm / (147 N)) = 441 N

Therefore, the minimum force needed to make the child lift off the ground is 441 N.

Explanation: hpe this helps :D

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Answer:

v = Δs/Δt

and use this calcultor"Velocity Calculator | Definition | Formula - Omni Calculator"if u have problems to slove.cos

Explanation:

Answer:

A. 48.6 W

Explanation:

Answer: 15.68ms

Explanation:

From the question, we are informed that it takes a time of 3.20s for the ball to return to her hand.

Then, the time thst will be taken by the ball to reach maximum height will be 1.6s

Let the initial speed be represented by v.

Therefore,

Vf = v - gt

where,

g = 9.8

t = 1.6

Vf = v - gt

0 = v - (9.8 × 1.6)

0 = v - 15.68

v = 15.68ms

=v−gt

⟹0=v−9.8×1.6

⟹v=15.68ms

The ratio of the intensity between light intensity that emerges from the last filter and unpolarized light of intensity, I₀ is It/I₀ = 0.2925

To answer the question, we need to know what polarization of light is.

This is when the electric field vector of light is oscillating in one plane.

Given that we have 7 polarizing filters, each rotated 17° cw with respect to the previous filter.

So, since the light is initially unpolarized,

Since I₇ is the last intensity I₇ = It = 1/2I₀cos¹²17°.

So, It/I₀ = 1/2cos¹²17°

= 1/2(0.9563)¹²

= 1/2 × 0.5850

= 0.2925

So, the ratio of the intensity between light intensity that emerges from the last filter and unpolarized light of intensity, I₀ is It/I₀ = 0.2925

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Tanya's weather record shows a transition from warm and humid conditions to cooler, clearer, and drier conditions, which is characteristic of a cold front weather system.

Tanya is experiencing a cold front weather system. A cold front occurs when a cold air mass moves in and replaces a warmer air mass. This can cause various changes in temperature and weather conditions.
At 10 A.M., the temperature is 24°C, and the weather is warm and humid. This indicates that a warm air mass is still present in the area.
By 12 A.M., the temperature drops to 20°C, and there is windy and heavy rain. This suggests that the cold front is moving in, forcing the warm air upwards. As the warm air rises, it cools and condenses, forming clouds and resulting in precipitation.

At 2 A.M., the temperature further decreases to 16°C, and the skies start to clear. This shows that the cold front has passed through, pushing the warm air mass away and bringing in cooler air behind it.
Finally, at 3 P.M., the temperature is 14°C, and the weather is clear and dry. This confirms that the cold front has fully moved through, leaving behind stable and cooler air.

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The ocean conveyor belt is a global system of deep and surface ocean currents that circulate water around the world. It is driven by differences in water density, temperatures, and salinity.

Salinity is the measure of the amount of dissolved salts in a given volume of water. It is typically expressed as parts per thousand (ppt) or parts per million (ppm). Salinity can be found in most bodies of water, including oceans, rivers, and lakes. Salinity levels can vary greatly depending on the source of the water, the amount of rainfall, and other factors. In general, the higher the salinity, the more difficult it is for organisms to survive in the water. High salinity levels can also affect the taste and smell of the water, and can be an indicator of water pollution. Salinity can also be an important factor for many human activities, such as agriculture, industry, and navigation.

The ocean conveyor belt has a huge effect on coastal climates by transporting heat from the tropics to higher latitudes, where it is released into the atmosphere. This helps warm coastal climates, resulting in milder winters and cooler summers. It also helps to reduce the effects of extreme weather events such as droughts and floods, by moderating temperatures and redistributing moisture.

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Answer:

Explanation:

time = 3 min.

velocity = 0.5 m/min

distance = velocity x time

              = 0.5 m/min x 3 min

              = 1.5 m.

Answer:This could be in the form of using fewer energy services or using devices that require less energy.

Explanation:

Gamma-ray bursts are intense flashes of high-energy radiation that come from various sources in the universe. These bursts are short-lived, lasting only a few seconds to a few minutes, and emit more energy in that brief time than our sun will in its entire lifetime.

The majority of gamma-ray bursts come from the distant reaches of space, beyond our own Milky Way galaxy. Scientists believe that most of these bursts are caused by the collapse of massive stars, which create black holes or neutron stars. These events, known as supernovas, release huge amounts of energy in the form of gamma rays.
However, there are also other types of gamma-ray bursts that come from different sources, such as merging neutron stars or even collisions between galaxies. Some gamma-ray bursts have also been detected coming from our own Milky Way, likely caused by the explosive deaths of massive stars.

In summary, gamma-ray bursts come from a variety of sources in the universe, but the majority are caused by the collapse of massive stars into black holes or neutron stars.
Gamma-ray bursts (GRBs) tend to come from two primary sources in the universe. They are extremely energetic and short-lived bursts of gamma-ray light, the most energetic form of electromagnetic radiation.

1. Long-duration GRBs: These bursts typically last from a few seconds to several minutes and are believed to originate from the collapse of massive stars. When a massive star reaches the end of its life, its core collapses into a black hole or a neutron star. This process, known as a core-collapse supernova, releases a tremendous amount of energy in the form of gamma rays. The resulting jet of energy is called a long-duration gamma-ray burst.

2. Short-duration GRBs: These bursts usually last less than two seconds and are thought to result from the merger of two compact objects, such as neutron stars or a neutron star and a black hole. When these objects collide, they release a vast amount of energy in the form of gamma rays, producing a short-duration gamma-ray burst.

Both types of gamma-ray bursts are observed at vast distances across the universe, indicating that they come from diverse cosmic environments. These powerful events serve as important probes of the early universe and can provide valuable information about star formation, cosmic evolution, and the nature of matter under extreme conditions.

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