Physics Middle School

Why can a crane lift extremely heavy loads?

A. The crane uses gears to reduce force needed to lift the object.

B. A wheel in the crane turns and the load is lifted on an axle.

C. A compound pulley system decreases the amount of force needed to lift an object.

D. The crane pulls objects up an inclined plane.

Answers

Answer 1
C I believe sorry if i’m wrong
Answer 2
Definitely C. I spent a few minutes researching so I am pretty confident.

Related Questions

The bottom wave has a greater _____

(1 point)



amplitude.

frequency.


trough.


wavelength.

Answers

Answer: hope this helps ♡

The bottom wave has a greater frequency.

Explanation:

1. Waves with a low frequency have a longer wavelength.

2. Waves with a high/great frequency have a shorter wavelength.

The bottom wave has a greater frequency. So, the second option is correct.

What is meant by frequency of a wave ?

Frequency of a wave is defined as the number of oscillations the wave completes in one second.

Here,

The diagrams of two waves are represented. The propagation of wave from the time zero to one second is given.

From the first diagram,

The wave is travelling from point a at t =  0 and reached at the point b at t = 1 s. This means in a time duration of 1 second, it has travelled a distance ab from a to b. The time taken for one oscillation to complete is called the time period. In the diagram, the number of waves passing in one seconds can be calculated. A few number of waves passed in one second.

From the second diagram,

The wave is travelling from the point a to point b in a time duration of one second. When compared to the top wave, the time taken for one wave to complete is lesser for the bottom wave. That means the time period is lesser than the top wave. In the diagram, it can be seen that, the number waves that has been completed in the one second is very high compared to that of the top wave. That means the bottom wave has higher frequency than that of the top wave.

Hence,

The bottom wave has a greater frequency.

To learn more about frequency of waves, click:

https://brainly.com/question/29739263

#SPJ2

Why does an ice cube melt when you hold it in your hand?

A. Thermal energy from your hand flows into the ice cube.

B. Your hand pulls kinetic energy away from the ice cube.

C. The air around the ice cube insulates it from the thermal energy in your hand.

D. Potential energy from your hand is converted into thermal energy.

Answers

Answer:

Thermal heat

Explanation:

The heat is transferred from your hand to the ice cube resulting in it melting.

A. Thermal energy from your hand flows into the ice cube.

Which type of wave can carry energy through a vacuum?(1 point)


electromagnetic


seismic


mechanical


sound

Answers

electromagnetic wave can carry energy through a vacuum
Electromagnetic waves.

Electromagnetic waves does not require any medium to propagate. These wave transmits energy through vaccum.
Other Questions
1. Avril deposited $800 in his bank at 1.5% for five years.Use the simple interest formula to calculate the amount of interest Avril will earn. Calculate the future value of her deposit.2. Phyllis borrowed $1,000 at 2% APR for six months. Use the simple interest formula to calculate the total amount of interest Phyllis will pay if she pays $200 two months into the loan and the rest at six months.3. James deposited $500 in his bank at 4.5% for 90 days.Use the simple interest formula to calculate the amount of interest James will earn using exact interest.Calculate the future value of the deposit.4. On May 4 Ariel signed a simple discount note for $3,500 at 3 1/2% for 60 days.Use the simple interest formula to calculate the amount of interest Ariel will pay using ordinary interest.Calculate the proceeds she will receive on May 4.Calculate the amount she will pay at maturityDetermine the date it will be due.5. What is the APY (effective rate) for 16% APR compounded quarterly? Round to hundredths.6. Louisa invested $4,500 at 4% interest compounded semiannually for two years. Calculate the future value of Louisa's investment using Exhibit 11-1 or the formula FV = P(1 + R)n.7. Cleve wants to know how much he would need to deposit now in order to have $8,000 in five years at a rate of 6% compounding quarterly. Use Exhibit 11-2 or the formula P = FV/(1 + R)n.8. I want to borrow $900 for 20 days from a payday loan store. The payday loan finance charge is $12 per $100 borrowed up to $400, and $10 per 100 on the amount over $400. What is the dollar amount of interest I am paying? What is the APR of this loan?9. Using Exhibit 12-1 or the formula, calculate the future value of an ordinary annuity with a quarterly payment of $1,000 made at the end of each quarter for four years compounding quarterly at 8%.10. Using Exhibit 12-1 or the formula, calculate the future value of an annuity due with a monthly payment of $50 made at the beginning of each month for 2.5 years compounding monthly at 6%. how do you recognize a stoichiometric mixture in a chemical reaction? A tool with which you can take a quick snapshot of part of a screen, and then add it to your document:a. sectionb. suppressc. screen clippingd. justified 1. Which of the following would be classified as a tangible asset?A. Copyright.B. Goodwill.C. Iron ore deposit.D. Patent Complete the sentences with the present perfect simple or continuous form of the verbs in brackets.Example: Have you been sleeping (you / sleep) well recently? 1 We ________ (know) each other since we met in the first week of university. 2 How long ________ (you / wait) to see the dentist? 3 ________ (you / ever / break) a bone? 4 Were exhausted because we ________ (dance) all evening! 5 How long ________ (your daughter / have) this stomach ache for? 6 This is the first time I ________ (wear) these shoes. Theyre so uncomfortable! 7 Karen ________ (not post) much on social media recently. 8 I ________ (never / see) you wearing a suit before! every year educational services (ets) selects readers for the advanced placement exams. recently the ap* statistics exam has been graded in lincoln, nebraska. one objective of ets is to achieve equity in grading by inviting teachers to be readers from all parts of the nation. however budgets are a consideration also. the accountants at ets wonder if the flights from cities west of lincoln are the same as flight costs from cities east of lincoln. a random sample of the expense vouchers from last year was reviewed for the cost of airline tickets. costs (in dollars) are shown in the table. indicate what inference procedure you would use to see if there is a significant difference in the costs of airline flights between the west and east coasts to lincoln, nebraska, then decide if it is okay to actually perform that inference procedure. (check the appropriate assumptions and conditions and indicate whether you could or could not proceed. you do not have to do the actual test.) Which of the following is NOT correct?A. Calorimetry involves an insulated container holding a liquid, usually water.B. An object of high temperature is placed into the calorimeter.C. The temperature change of the object and the water will be equal.D. The heat absorbed by the water is equal to the heat lost by the object.E. Calorimetry is a process that measures the heat released or absorbed during a chemical or physical change. why can't the enthalpy of formation of calcium carbonate be determined directly? If a store orders 100 units every time and sells 90 units each week, what is the average inventory? Es un gnero periodstico informativo de tema libre combina la narracin argumentacin el dilogo y la crtica A dolphin was swimming 6 feet below sea level. The number line shows thelocation of the dolphin. It then swam down 3 feet. Describe how to use thenumber line to find the new location of the dolphin.++++-10-9-8-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10OA. On the number line, move 3 units to the left. End at -9. The dolphinwas 9 feet below sea level.OB. On the number line, move 3 units to the right. End at 9. The dolphinwas 9 feet above sea level.O C. On the number line, move 3 units to the left. End at 3. The dolphinwas 3 feet above sea level.OD. On the number line, move 3 units to the right. End at -3. Thedolphin was 3 feet below sea level.SUBMIT fill in the blank. according to___, three distinct types of gangs might form in neighborhoods, which are criminal gangs, conflict gangs, and retreatist gangs. Find a negation for each of the statements in (a) and (b). (a) This vertex is not connected to any other vertex in the graph. No vertex is connected to any other vertex in the graph. All vertices are connected to all other vertices in the graph. This vertex is connected to at least one other vertex in the graph. All vertices are connected to at least one other vertex in the graph. This vertex is connected to all other vertices in the graph. Suppose a random sample of size 45 is selected from a population with = 11. Find the value of the standard error of the mean in each of the following cases (use the finite population correction factor if appropriate).a. The population size is infinite.b. The population size is N = 50,000.c. The population size is N = 5000.d. The population size is N = 500. Find X using the picture of the triangles below. What happens to the electroosmotic flow in a fused-silica capillary as the pH of the running buffer is lowered for a CE run? A. It does not change. B. It overheats. C. It slows. D. It speeds up. Which of the following made it difficult for the United States to deal with the belligerents on equal terms? During chemical reactions, bonds between atoms break and form. what does this mean in terms of subatomic particles? The CFTR protein is a single polypeptide of 1,480 amino acids. What is the approximate minimum length of it's mRNA?A. 1,500 nucleotidesB. 4,500 nucleotidesC. 10,000 nucleotidesD. 100,000 nucleotidesE. 190,000 nucleotides The following sort method correctly sorts the integers in elements into ascending order.Line 1: public static void sort(int[] elements)Line 2: {Line 3: for (int j = 1; j < elements.length; j++)Line 4: {Line 5: int temp = elements[j];Line 6: int possibleIndex = j;Line 7: while (possibleIndex > 0 && temp < elements[possibleIndex - 1])Line 8: {Line 9: elements[possibleIndex] = elements[possibleIndex - 1];Line 10: possibleIndex--;Line 11: }Line 12: elements[possibleIndex] = temp;Line 13: }Line 14: }Consider the following three proposed changes to the code:Change 1Replace line 3 with:Line 3: for (int j = elements.length - 2; j >= 0; j--)Change 2Replace line 7 with:Line 7: while (possibleIndex > 0 && temp > elements[possibleIndex - 1])Change 3Replace line 7 with:Line 7: while (possibleIndex < elements.length - 1 && temp < elements[possibleIndex + 1])and replace lines 9-10 with:Line 9: elements[possibleIndex] = elements[possibleIndex + 1];Line 10: possibleIndex++;Suppose that you wish to change the code so that it correctly sorts the integers in elements into descending order rather than ascending order. Which of the following best describes which combinations of the proposed changes would achieve this goal?A) Enacting any of the three changes individuallyB) Enacting changes 1 and 2 together, or enacting change 3 by itselfC) Enacting changes 1 and 3 together, or enacting change 2 by itselfD) ONLY enacting changes 1 and 2 togetherE) ONLY enacting change 2 by itself