A sailor pulls a boat along a dock using a rope at an angle of 35. 0º with the horizontal. How much work does the sailor do if he exerts a force of 455 N on the rope and pulls the boat 9. 50 m?
Calculate the kinetic energy of a truck that has a mass of 1900 kg and is moving at 45 m/s.
Find the mass of a car that is traveling at a velocity of 75 m/s North. The car has 5,040,000 J of kinetic energy.
How fast is a ball rolling if it contains 108 J of kinetic energy and has a mass of 3. 5 kg?
At an accident science on a level road, investigators measure a car’s skid mark to be 85 m long. The accident occurred on a rainy day, the coefficient of friction was estimated to be 0. 25. What was the speed of the car when the driver slammed on and locked the brakes?
A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 980 N to push large crates a distance of 15 meters in 30 seconds. Determine the power output required of such a motor.
Josh and Jake are both helping to build a brick wall which is 6 meters in height. They each lay 350 bricks, but Josh finishes this task in 2 hours while Jake requires 5. 5 hours to complete his part. Who does more work, or do they both do the same amount? Who has more power? Explain.
please help me
Answers
Answer:
What work is done when a person pushes an 80 kg washing machine 12m across the floor. The force of friction between the washing machine and floor is 500 N.
A sailor pulls a boat along a dock using a rope at an angle of 60° with the horizontal. How much work does the sailor do if he exerts a force of 255 N on the rope and pulls the boat 4.0m?
Explanation:
Related Questions
Why is it sometimes difficult for scientists to identify a a fold or fault?
Answers
Folds and faults are difficult to identify because they occur in the interior of rocks and also due to the dense nature of the materials.
What are faults and folds?Faults are lines of weakness are present in materials dues to uneven positioning of the particles of the material.
Folds occurs when infolds occur in materials.
Faults and folds usually occur in rocks.
Folds and faults are difficult to identify because they occur internally and also due to the dense nature of the materials.
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simple cell. Study it and answer the questions that follow
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Explanation:
there is no picture or question attached
Question 1 of 10
What do all waves in the electromagnetic spectrum have in common?
OA. They have the same distance between crests.
OB. They have the same energy.
C. They have the same rate of motion.
D. They have the same frequency.
SUBMIT
Answers
Answer:
They have the same rate of motion.
Explanation:
Electromagnetic radiation is a type of energy that is commonly known as light. Generally, light travels in waves, and all electromagnetic radiation travels at the same speed, which is about 3.0 × 108 ms− 1 through a vacuum.
A circuit carries a current of 0.64 A when there is a resistance of 50.0 Ω. The voltage applied to the circuit, to the nearest whole number, is ___ V.
Answers
V = 32 volts
Answer:
32v
Explanation:
edge 2023
Describe the orbit in which planets revole around the sun
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you want to make some hot chocolate with 1000.00 grams of h20. if it takes 435000 joules of energy to heat you water, what is the temperature change?
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The temperature change from the calculation is obtained as 104 degrees.
What is energy?The term energy is described as the ability to do work. Now we are told that the energy that is added to the water is 435000 joules.
Given that;
H = mcdT
m = mass
c = specific heat capcity
dT = temperature change
dT = H/mc
dT = 435000/1000 * 10^-3 * 4200
dT = 104 degrees
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A star is observed to have a temperature of 3000 k and a luminosity of 105. what is the color of the star? what group does the star belong to?
Answers
AnsAnswerwer:
the first box is red and the second boybox is giant
Explanation:
Answer:
the first answer is red and the second answer is supergiant
Explanation:
i just did it on edge 22
If a 600-N force is exerted on a box to push it to the right, and a 300-N force is exerted on the same box to push it to the left, what is the net force and direction of the box?
Answers
Help !!
If an object is placed 3 cm from the mirror, how far will the object appear “behind” the mirror?
Answers
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This is because of the diagram below:
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
As we know the property of a plane mirror, image formed by it is always virtual, of same Size as the object and at the same Distance as the object from the mirror. so we can say that the distance of image from the object = 3 cm from the mirror ( as per the property ) and at a distance of 6 cm from the object.
The velocity of a free falling ball at different time intervals on unknown planet is shown in Figure 1.24.
Answer all of the following questions based on the image
A) What is the acceleration due to gravity of the planet?
B)What is the velocity at positions A and B?
C)What happens to the magnitude of velocity with passage of time? Why?
D)What factor(s) can influence the falling object on the Earth?
Answers
Answer:
a1 = (V2 - V1) / 1 s = 3.75 m/s^2
a2 = (V2 - V1) / (t2 - t1) = (7.5 - 3.75) / 1 s = 3.75 m/s^2
a3 = (V2 - V1) / (t2 - t1) = (7.5 - 3.75) / 1 s = 3.75 m/s^2
A) a = (a1 + a2 + a3) / 3 = 3.75 m/s^2
v = a (t2 - t1)
B) after 1 sec v = 3.75 m / sec^2 * 1 sec = 3.75 m/s
after 2 sec v = v0 + a t = 3.75 m/s + 3.75 m/s^2 * 1 s = 7.5 m/s
C) The velocity increases proportionaly to the time
D) One factor depends on the variation of the acceleration due to gravity because of different positions of measurement (on earth)
A much larger factor is due to air resisance of the air on the falling object
Two particles A and B start simultaneously from a Point P with velocities 20 m/s and 30 m/s respectively. A and B move with acceleration equal in magnitude but opposite in direction. When A overtakes B at Q, its velocity is 30 m/s. The velocity of B at Q :
Answers
Answer:
20 m/s
Explanation:
Given
u(A) = 20 m/su(B) = 30 m/sacceleration equal in magnitude but opposite in directionSolving
Velocity of A at Q = 30 m/sFrom, P to Q, Δv(A) = 30 - 20 = +10 m/sTherefore, velocity of B at Q will be decreased by 10 as it is equal in magnitude but opposite in direction to AΔv(B) = v(B at Q) - u(B at P)-10 m/s = v(B at Q) - 30 m/sv(B at Q) = 30 - 10 = 20 m/sThe type of galaxy that sometimes has a distinct bar of stars running across the central region is:.
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When you push your palms together and rub them back and forth, you are demonstrating one way of converting ________ energy into ________ energy.
Answers
Answer:
When you push your palms together and rub them back and forth, you are demonstrating one way of converting Kinetic energy into thermal energy.
A man climbs on to a wall that is 3 m high and gains 2268 J of potential energy. What is the mass of the man? (g=9.8 m/s^2) *
Answers
Answer:
77.14 kg
Explanation:
P.E = mg h
2268 = m * 9.8 * 3 m = 77.14 kg
The conversion of ozone to diatomic oxygen is represented by the equation above. Based on the data in the table above, what is the approximate average bond enthalpy for the oxygen-to-oxygen bonds in ozone?.
Answers
The approximate average bond enthalpy for the oxygen-to-oxygen bonds in ozone is 300 kJ/mol. The ozone is composed of three oxygen atoms, and it's highly reactive.
What is ozone?Ozone is a light blue-colored gas, that is highly soluble in an inert, non-polar solvent.
[tex]2O_3 \rightarrow 3O_2 \\\\ \Delta H = -300 KJ/mol[/tex]
There are double bonds present in the ozone, two molecules of ozone mean there will be four bonds.
[tex]4 \times E -3 \times 500 = -300\\\\4 \times E = -300 + 1500\\\\E = \dfrac{1200}{4} \\\\E = 300 \;KJ/mol[/tex]
Thus, the correct option C, 300 kJ/mol.
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What is the purpose of the outer reflective fabric layer of a spacesuit?.
Answers
Explanation:
The purpose of the fabric is to deflect the harmful electromagnetic radiation from the sun and other sources. Higher energy radiation such as gamma rays or UV rays can ionize the atoms in our skin and organs. Therefore, it would be beneficial to deflect that radiation
Answer:
To cope with the extremes of temperature, most space suits are heavily insulated with layers of fabric (Neoprene, Gore-Tex, Dacron) and covered with reflective outer layers (Mylar or white fabric) to reflect sunlight.
Carbon-14 is a radioactive isotope of carbon with a half-life of 5,730 years. A paleontologist finds fossil that contains 25% of its original amount of carbon -14 atoms. How old is the fossil?
Answers
The age of the fossil which contains the Carbon-14 radioactive isotope is 11460 years
How to determine the number of half-lives Original amount (N₀) = 100%Amount remaining (N) = 25%Number of half-lives (n) =?2ⁿ = N₀ / N
2ⁿ = 100 / 25
2ⁿ = 4
2ⁿ = 2²
n = 2
How to determine the age Half-life (t½) = 5730 yearsNumber of half-lives (n) = 2Time (t) =?t = n × t½
t = 2 × 5730
t = 11460 years
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A uniform cube with mass 0.500 kg and volume 0.0270 m3 is sitting on the floor. A uniform sphere with radius 0.400 m and mass 0.800 kg sits on top of the cube. How far is the center of mass of the two-object system above the floor
Answers
Answer:
44 1/3 cm
Explanation:
The cube has an edge length of ∛0.027 m = 0.3 m, so a center of mass (CoM) 15 cm above the floor.
The sphere's center of mass is 40 cm above the top of the cube, so is 70 cm above the floor. The weighted average of the CoM locations is ...
((15 cm)(0.700 kg) +(70 cm)(0.800 kg))/(0.700 kg +0.800 kg)
= (10.5 kg·cm +56 kg·cm)/(1.500 kg) = 44.333... cm
The center of mass of the two-object system is 44 1/3 cm above the floor.
What is the power of a toaster if it can perform 3500 j of work In 3 minutes
Answers
Answer:
Around 20 watts, or 19.4W exactly
Explanation:
to calculate the power in a time frame you use
Joules/Time(Seconds) = W (your power)
So, we take 3500 joules / 3min (180sec)
3500/180 = 19.4W, if your question asks you to round up/down, round up to 20W of power! good luck!
A car is driving at 18 m/s as it begins to merge onto a freeway. If it starts to accelerate at a constant rate of 5 m/s2, how long does it take the car to reach a speed of 47 m/s
Answers
Answer:
it will take 5.8seconds
Tina speaks using a nonelectric megaphone. The megaphone makes her voice louder in one direction.
How does a megaphone work?
Select one:
It affects the vocal cords of a person and allows them to make louder sounds.
It increases the amplitude of spreading sound waves.
It changes the frequency of the spreading sound waves.
It collects sound waves and reflects them in a direction
Answers
The megaphone makes her voice louder in one direction, increases the amplitude of spreading sound waves.
What is megaphone?Megaphone is a Spotify-owned podcast technology company that specializes in ad insertion and hosting.
While the distance between from the crest of a wave to the next crest is known as the amplitude.
The megaphone makes her voice louder in one direction, increases the amplitude of spreading sound waves.
Hence, option B is correct.
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what do it mean by the value of gravitational constant is 6.67×10^-11Nm^2/kg^2
Answers
Answer:
gravitational constant value means it was never change in any particular area of the Earth
What voltage source provides alternating current?
Answers
A good example of a voltage source, and the most commonly used, is a bettery. A voltage source is essential for any electrical circuit to function.
Answer:
an alternator or a generator
Explanation:
batteries do NOT provide alternating current ...they provide DC
You are thinking about adding a part-time job to your business? You could pay the employees the $6.50 per hour. How much would you pay if the employee Works 15 hours per week? How much would you pay if the employee Works 20 hours per week?
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Answer:
1.) 15hrs per week = $97.50
2.) 20hrs per week = $130
Explanation:
Which would take more force to stop in 17. 3 seconds: a 3. 2 kg ball rolling in a straight line at a speed of 0. 3 m/sec or a 4. 1 kg ball rolling along the same path at a speed of 1. 2 m/sec?
Answers
This is because the mxv is greater than the other one.
For the 4.1kg ball, the force it’s moving on is 4.92N
As for the 3.2kg ball, it’s moving with a force of 0.9N. Much less than the other one.
Dr. Man was studying a fossil from a dig in a desert when he noticed that the organism had evidence of fins.
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State Schrodinger equation.
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Hi!Schrodinger equation is written as HΨ = EΨ, where h is said to be a Hamiltonian operator.
The stimuli for kinesthesis is the __________ energy of joint and muscle movement. a. thermal b. electrical c. mechanical d. chemical
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The complete statement is "The stimuli for kinesthesis is the mechanical energy of joint and muscle movement.". Option C. This is further explained below.
What is kinesthesis?Generally, Kinesthetic helps in this way wherewith one's eyes closed, there is awareness of the locations of the body parts.
In conclusion, mechanical energy of joint and muscle movement is the stimuli for kinesthesis
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In the first video for chapter 29, we looked at the emission spectrum of excited gases. In this video, we look at the __________ spectrum of colored filters
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Although the video is not found here, the sentence makes reference to the transmission spectrum of colored filters.
What is the transmission spectrum?The transmission spectrum indicates the light portion having a given wavelength that can be passed through a filter.
This spectrum (transmission spectrum) depends on the physical separation of the particles that form the filter.
In conclusion, although the video is not found here, the sentence makes reference to the transmission spectrum of colored filters.
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When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate, the result must be within what amount of the control panel setting
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When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate, the result must be within what amount of the control panel setting will be ±4 kVp.
What is quality control?
Quality control entails testing units to see if they meet the standards for the final product.
The goal of the testing is to evaluate whether any corrective measures are required in the production process. Good quality control assists businesses in meeting customer needs for improved products.
When a quality control test is performed to ensure that the penetrating ability of the x-ray beam is accurate. The results must be under some limits.
Hence the result must be within what amount of the control panel setting will be ±4 kVp.
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