What is a bar screw jack most typically used for? a- lift an object b- stabilize an object c- produce mechanical advantage d- create an opening

Answers

Answer 1

Answer:

Answer:

Lift an object

Explanation:

Bar screw jacks are mechanical devices designed to lift heavy objects by applying mechanical advantage. They are commonly used for tasks like lifting vehicles for maintenance or supporting heavy loads in construction and industry.

Related Questions

The light in this diagram is producing light.Which best describes the process of energy conversion to accomplish this?A.Electrical energy turns the rod. This energizes the coil. The magnetized coil generates an electric current. The electric current goes through the wires to power the lightbulb.B.Mechanical energy turns the rod. This electrifies the coil. The electrified coil generates a magnetic field. The magnetic field goes through the wires as electricity to power the lightbulb.C.Mechanical energy turns the rod. This magnetizes the coil. The magnetized coil generates an electric current. The electric current goes through the wires to power the lightbulb.D.The magnetic energy in the coil turns the rod. The rod generates an electric current. The electric current goes through the wires to power the lightbulb.
The jovian planets contain a large percentage of the gases
A metal plate is connected by a conductor to a ground through a switch. The switch is initially closed. A charge of +Q is brought close to the plate without touching it, and then the switch is opened. After the switch is opened, the charge +Q is removed. What is the charge on the plate then?
What are the advantages and disadvantages for methods used to reduce the impact of human activity?
At a certain elevation, the ________ , the air becomes saturated and water-vapor molecules ________.

Which of the following is the largest disadvantage of hydropower

Answers

Hydro power, although a low-cost option, is not implemented every time because of the amount of disadvantages there are. One of the disadvantages this has is the pollution is gives. Since the reservoir is always filled with water, this causes any surrounding plants and trees to decompose, releasing a huge amount of methane and carbon dioxide into the environment. Aside from this, it also destroys nearby habitats, and diverts natural waterways, effectively killing fishes too.

Ruff, the 50 cm tall Labrador Retriever stands 3 m from a plane mirror and looks at his image. What is Ruff’s image position and height?

Answers

Since the mirror is plane, the image will be formed behind the mirror. The distance will be the same as that of the distance of the object from the mirror and the height will just be the same.
So, Ruff's image will be 3 m behind the mirror and 50 cm tall.

The diagram shows a swinging pendulum.Which best explains what happens to the motion of the pendulum?

A. The mechanical energy transforms to thermal energy as the pendulum slows and eventually stops moving.

B. The mechanical energy disappears as the pendulum slows and eventually stops moving.

C. The pendulum will continue moving at the same speed until someone stops it because energy cannot be destroyed.

D. The pendulum will slow down but will never stop moving because energy cannot be destroyed.

Answers

The correct answer is

A. The mechanical energy transforms to thermal energy as the pendulum slows and eventually stops moving.

In fact, we must keep in mind the presence of the air, which causes some resistance to the motion of the pendulum. As the pendulum moves through the air, part of its mechanical energy is transferred to the molecules of air because of the friction of this molecules with the surface of the pendulum. As a result, the pendulum slows down, and eventually stops. The initial energy of the pendulum has been converted into thermal energy of the molecules of air, which move faster now.

Answer:

The guy above is correct it's A

When describing a maritime polar air mass, you might say it formed over _____ and is _____.

Answers

The correct answer for the question that is being presented above is this one: "an air mass that formed over land. it is cold and dry." When describing a maritime polar air mass, you might say it formed over land and is cold and dry. It's temperature can range from around freezing to near 20 degrees Celsius

Answer:

water, cold and moist

Explanation:

I just did a test on it and got it wrong using land, cold and dry and got it right using this anwer

What is the best temperature for a refrigerator?

Answers

the best temperature for a refrigerator is 40 degrees F (4 degrees C)

The best temperature for your refrigerator should be 40 degrees F, 40 degrees C in this case. (: Hope this helped!

What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient?

Answers

This can be seen as a trick question because heat engines can typically never be 100 percent efficient. This is due to the presence of inefficiencies such as friction and heat loss to the environment. Even the best heat engines can only go up to around 50% efficiency.

Answer:

An infinite temperature

Explanation:

The efficiency of an engine is defined as:

$\eta=1 -(T_C)/(T_H)$

where

$T_H$ is the temperature at which heat enters the engine

$T_C$ is the temperature of the environment, to which the engine exhausts heat

From the formula, we see that for an engine to be 100% efficient, the fraction

$(T_C)/(T_H)$

must be equal to zero. Since the value of $T_C$ is never zero (the temperature is expressed in Kelvin, and the temperature of the environment can never be exactly 0 K), the only possibility for that to occur is that the temperature at which heat enters the engine ( $T_H$ ) is infinite, so that this fraction becomes zero and the efficiency becomes 1.

Other Questions

Two 0.006 Kg bullets are fired with speeds of 20.0 m/s and 50.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the difference of their kinetic energies?

When Emma pushes a bag with a force of 27 newtons, the coefficient of kinetic friction between the bag and the floor is 0.23. What is the normal force acting on the bag by the floor?. A. 0.085 newtons B. 27 newtons C. 2.7 × 10^2 newtons . D. 1.2 × 10^2 newtons

A quasi-judicial independent agency has the power to _______. Please select the best answer from the choices provideda. create laws b. print currency c. rule on conflicts d. call Congress into session

A central air-conditioner uses 3500W of electricity. If electricity costs $0.087/kW*h. calculate how much it would cost to operate the air-conditioner 24 hours a day for 4 months (120 days).