# What is the kinetic energy of a 29 kg dog that is running at a speed of 7.9 m/s (about 18 mi/h)?

45,322 questions, page 202
1. ## physics

. A car is safely negotiating an unbanked circular turn at a speed of 19 m/s. The road is dry, and the maximum static frictional force acts on the tires. Suddenly a long wet patch in the road decreases the maximum static frictional force to one third of

asked by vik on October 22, 2014
2. ## Physics/Math

A certain string can withstand a maximum tension of 43 N without breaking. A child ties a 0.37 kg stone to one end and, holding the other end, whirls the stone in a vertical circle of radius 0.91 m, slowly increasing the speed until the string breaks.

asked by COFFEE on February 12, 2007
3. ## calculus-snell's law

Suppose A light ray starts at the point A = (0,a) in an uniform medium 1 where the speed of light is c1 and then passes through an uniform medium 2 where the speed of light is c2 reaching point B = (d, −b). The line separating the two media is the

asked by Mable on March 2, 2017
4. ## Physics II

A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, a 47.0 μF capacitor is charged to 5.91 kV. Paddles are used to make an electrical connection to the patient's chest. A pulse of current

asked by Tina on July 3, 2017
5. ## phy 231

It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). a.What is the angular speed of the earth? I got 7.292x10^-5 rad/s b.Assume the earth is spherical. Relative to someone on the rotation axis, what is the

asked by Andrea on February 20, 2016
6. ## physics

Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 2.65m/s . Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a

asked by brandon on September 9, 2013
7. ## Physics

Use principles of force and kinematics to answer these: a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they collide, the 40 kg skater pushes on the 60 kg skater, applying a force 100 Newtons for 1.2 seconds. Find the velocity at which

asked by jen on November 1, 2010
8. ## physics

Use principles of force and kinematics to answer these: a. A 40 kg skater pushes on the 60 kg skater (initially at rest). As they collide, the 40 kg skater pushes on the 60 kg skater, applying a force 100 Newtons for 1.2 seconds. Find the velocity at which

asked by jen on November 1, 2010
9. ## Physics

a siren on top of the police car emits sound at frequency of 820 Hz. The car passed a bystander on a sidewalk and is receding at speed 142 km/h/ what is the frequency the bystander hears. assume the speed of sound in air to be 340 m/s. 142 km/h x 1000 /

asked by Maria on May 1, 2018
10. ## math

The driving distance between Manchester and London is 195 miles. Farris intends to travel from Manchester to London by coach. The coach will leave Manchester at 3:30pm Fairs assumes that the coach will travel at an average speed of 50 mph. A) Using his

asked by Jesss on September 29, 2018
11. ## math

An executive drove from home at an average speed of 45 mph to an airport where a helicopter was waiting. The executive boarded the helicopter and flew to the corporate offices at an average speed of 120 mph. The entire distance was 250 miles; the entire

asked by Matt on September 9, 2015
12. ## algebra

An executive drove from home at an average speed of 45 mph to an airport where a helicopter was waiting. The executive boarded the helicopter and flew to the corporate offices at an average speed of 120 mph. The entire distance was 250 miles; the entire

asked by Aaron on September 9, 2015
13. ## algebra

An executive drove from home at an average speed of 45 mph to an airport where a helicopter was waiting. The executive boarded the helicopter and flew to the corporate offices at an average speed of 120 mph. The entire distance was 250 miles; the entire

asked by Samantha on September 9, 2015
14. ## Managerial Economics/Math

I need help on some homework questions for an MBA-level Managerial Economics class. Here is the first question. 1. JALT, Inc. is a new firm offering investment consultant services to the rich. Harvey Milkemnow, having had experience in this area, is the

asked by Klynn on September 19, 2007
15. ## English

I left out the following sentences. Thank you very much for your invaluable help! 1) I don't like reading novels because they are sometimes too abstract. I've got a quite oval face. 2) I like doing clothes shopping. At five o'clock I do to calisthenics

asked by Henry2 on November 11, 2011
16. ## Physics

A ballistic pendulum was a device used in the past century to measure the speed of bullets. The pendulum consists of a large block of wood suspended from long wires. Initially, the pendulum is at rest. The bullet strikes the block horizontally and remains

asked by Jeff on October 26, 2012
17. ## Physics

A soccer player kicks the ball toward a goal that is 28.0 m in front of him. The ball leaves his foot at a speed of 19.5 m/s and an angle of 30.6° above the ground. Find the speed of the ball when the goalie catches it in front of the net. (Note: The

asked by Anonymous on December 1, 2015
18. ## physics

Gayle runs at a speed of 3.80 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they

asked by jovelyn trocio on October 8, 2015
19. ## Physics

Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Barbara is skating due south at a speed of 5.2 m/s. Neil is in front of her. With respect to the ground, Neil is skating due west at a speed of 3.2 m/s. Find Neil's velocity

asked by Hoku on September 23, 2014
20. ## Science

I needed help with this question. I’m not sure I got it quite right. Is it correct to say that in every case, without exception, any radio wave travels faster than any sound wave? ANSWER: Yes, it is correct to say because radio waves are electromagnetic

asked by Lizzie on January 25, 2010
21. ## Physics

Gayle runs at a speed of 3.80 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they

asked by A on October 17, 2010
22. ## physics

gayle runs at a speed of 4.00 m/s and dives on a sled, initially at rest on the top of a frictionless, snow-covered hill. after she has descended a vertical distance at a 5.00 m, her brother,who is initially at rest, hops on her back, and they continue

asked by naome on October 8, 2015
23. ## physics

A physics professor moonlights as a daredevil jumping things on a motorbike. His next stunt will be to jump the oldman river on his motorcycle. The ramp is being built 100 m above the river and made an angle of 50.0 o relative to the horizontal. The

asked by tom on February 23, 2016
24. ## physics

A physics professor moonlights as a daredevil jumping things on a motorbike. His next stunt will be to jump the oldman river on his motorcycle. The ramp is being built 100 m above the river and made an angle of 50.0 o relative to the horizontal. The

asked by tom on February 21, 2016
25. ## Physics

A simple pendulum of length 2.00m is made with a mass of 2.00kg. The mass has speed of 3.00 m/s when the pendulum is 30 degrees above its lowest position. -What is the maximum angle away from the lowest position the pendulum will reach? -What is the speed

asked by Alex on November 9, 2014
26. ## Pre-calc

Boat A leaves a dock headed due east at 1:00PM traveling at a speed of 13 mi/hr. At 2:00PM, Boat B leaves the same dock traveling due north at a speed of 20 mi/hr. Find an equation that represents the distance d in miles between the boats and any time t in

asked by Emily on January 28, 2016
27. ## Physics

A simple pendulum of length 2.00m is made with a mass of 2.00kg. The mass has speed of 3.00 m/s when the pendulum is 30 degrees above its lowest position. -What is the maximum angle away from the lowest position the pendulum will reach? -What is the speed

asked by Alex on November 5, 2014
28. ## physics

Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740 kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 200 m high hill in 2.00

asked by Justin on September 15, 2013
29. ## physics

Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740 kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 200 m high hill in 2.00

asked by Justin on September 15, 2013
30. ## Physics help!

A box of books weighing 323 N is shoved across the floor by a force of 477 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.51, how long does it take to move the box 4.80 m starting from rest? (b)

asked by Bridge on September 28, 2011
31. ## Physics

A box of books weighing 337 N is shoved across the floor by a force of 467 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.56, how long does it take to move the box 4.00 m starting from rest? s (b)

asked by Anonymous on December 8, 2014
32. ## physics

A box of books weighing 314 N is shoved across the floor by a force of 475 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.53, how long does it take to move the box 5.00 m starting from rest? What

asked by John Miller on April 8, 2013
33. ## physics

Two towers(the towers are the same) are built next to each other. the distance between them is d and there height is 10,000d. a ball is thrown horizontally from one tower to the other with spped v=sqrt(gd/2). assuming the ball collied elasticlly with the

asked by larry on January 27, 2015
34. ## physics

While riding in a hot air balloon, which is steadily descending at a speed of 1.39 m/s, you accidentally drop your cell phone. (a) After 4.00 s, what is the speed of the cell phone? (b) How far is the cell phone below the balloon after this time? d = m (c)

asked by Anonymous on September 14, 2014
35. ## physics

While riding in a hot air balloon, which is steadily descending at a speed of 1.39 m/s, you accidentally drop your cell phone. (a) After 4.00 s, what is the speed of the cell phone? (b) How far is the cell phone below the balloon after this time? d = m (c)

asked by Dann on September 14, 2014
36. ## Calculus

Suppose that two boats leave a dock at different times. One heads due north, the other due east. Find the rate at which the distance between the boats is changing when the first boat is 56 miles from the dock traveling at a speed of 35 miles per hour and

asked by Hailey on October 7, 2014
37. ## Help me please I dont know this quation

How to affect lattice energy,charge on the ion and radius of the ion, the solublity of the substance. please if it is possible with example

asked by Abdela on February 17, 2012
38. ## PHYSICS

A 4.00 µF capacitor is connected to a 18.0 V battery. How much energy is stored in the capacitor? This should be a relatively easy problem yet, I can't get it. Isn't it just E=.5*C*V^2

asked by Physics on May 12, 2010
39. ## physics

A television uses a current of 1.5A at 120V. The television is used 2 hours. Calculate the power used in KW and the energy used in kWh.

asked by chantel on May 4, 2008
40. ## health

What everyday changes, if any, might you make to increase the amount of energy expended in your day-to-day activities?

asked by Anonymous on November 12, 2009
41. ## Physics

A 100-n boulder is sitting on a shelf 0.5 meters above the floor. What is the potential energy of the boulder?

asked by Nicole on October 15, 2008
42. ## chemistry

In a certain process, the internal energy of a system increases 40.7 J and the quantity of work the system does on the surroundings is 78.9 J. What is q?

asked by Kamila on March 21, 2011
43. ## science

which energy transformation takes when a firecracker explodes. plz, help I don't want answers I want help plz.

asked by Anonymous on March 16, 2018
44. ## Chemistry

How much energy is required to convert 360 gram of ice having temp -10 c to convert in to steam

asked by Priyank on January 27, 2017
45. ## Chemistry

On a melting curve, the heat energy represented by the horizontal portion of the curve is called what?

asked by Christina on November 9, 2009
46. ## Chemistry

How many joules of energy are released when 45.0g of water cools from 18.0C to 70.0C? Specific heat of water is 4.184J/gC.

asked by Mary on February 8, 2015
47. ## Astronomy

What is the wavelength of a radio photon from an "AM" radio station that broadcasts at 1160 kilohertz? What is its energy ?

asked by Yazmin on July 14, 2018
48. ## physics

Suppose all of the apples have a mass of 0.10 kg. If one of the apples in the bowl (C) is 1.0 meter above the ground, what is its potential energy?

asked by ravyn on January 26, 2011
49. ## Chemistry

How much energy must be absorbed by 20.0 g of water to increase its temperature from 283.0 degrees c to 303.0 degrees c

50. ## Chemistry

calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius

asked by anon on February 26, 2013
51. ## physics

Suppose all of the apples have a mass of 0.10 kg. If one of the apples in the bowl (C) is 1.0 meter above the ground, what is its potential energy?

asked by ravyn on January 26, 2011
52. ## Chemistry

how many joules of energy are needed to change 400 grams of water from 35 degrees C to 45 degrees C?

asked by helpneeded on September 1, 2016
53. ## Science

Is this correct? The Change of energy of a Slingshot: Elastic Potention-Gravitational potential-potential?

asked by Chris on May 20, 2010
54. ## Physics

A photon has a frequency of 7.3 × 10–17 Hz. Planck’s constant is 6.63 × 10–34 J•s. The energy of the photon, to the nearest tenths place, is × 10–50 J.

asked by Chelsea on May 11, 2016
55. ## physics

A mass of 1000kg is released from a height of 10m.with what energy will it strike the floor?(g=10m/s/s)

asked by Kenoba on February 27, 2012
56. ## physics

Suppose all of the apples have a mass of 0.10 kg. If one of the apples in the bowl (C) is 1.0 meter above the ground, what is its potential energy?

asked by ravyn on January 26, 2011
57. ## health

How do you lose weight? A. By using up more calories than you take in B. By using up more money on diet programs and pills C. By using up less energy than you take in D. By using up less calories than you take in D?

asked by kevin on August 26, 2014
58. ## math

On May 22, 1960, a powerful earthquake took place in Chile. It had a magnitude of 9.5. How much energy did this earthquake release?

asked by samantha on November 20, 2014
59. ## physics

An ideal gas at 20 C consists of atoms 22*10^22. 4.5 J of thermal energy are removed from the gas. What is the new temperature in C?

asked by Isabel-A on November 13, 2010
60. ## physical chemistry

the rate constant for a reaction at 30 degrees is found to be exactly twice the value at 20 degrees. calculate the activation energy

asked by ntsika on March 14, 2016
61. ## biology

if an ox extracts only 50% of potential energy in grass and out of this if the ox used 40% to build up its body ,then the overall efficiency of grass to become part of ox would be: A)10% C)20% B)15% D)30%

asked by rebika on August 22, 2017
62. ## science

How much work is done by the system if the internal energy decrease by 100j when 200j applied to the system

asked by Haopu on November 23, 2016
63. ## physics

An athlete stretches a spring an extra 15.9 cm beyond its initial length. How much energy has he transferred to the spring

asked by Anonymous on May 25, 2014
64. ## chemistry

how much energy is required to heat 1.00L of water from 20degrees celcius to 90degress celcius

asked by shawn on September 29, 2010
65. ## Science

The mass defect in a certain nuclear reaction is 0.108a.m.u.Determine the energy released in the reaction

asked by Olushola on April 14, 2015
66. ## chem

How much heat(energy) in calories will it take to warm 25 g of ice at -10 degrees C to liquid water at 40 degrees C?

asked by bob on April 13, 2008
67. ## Chemistry

How much energy(in calories)would it take to heat 13g of water 2 degrees Celsius?? 1.00cal/1g C = 13 x 2 = 26 Calories Is that right?

asked by Joan on September 22, 2014
68. ## Physics

A 0.40 g fruit in a tree has a gravitational potential energy of 200 J. How high from the ground is the fruit?

asked by Seph on December 8, 2013
69. ## chemistry

A. Orbital shape B. Orientation in the orbital C. Main energy level D. Electron spin

asked by Morgan on December 15, 2014
70. ## Physics

) The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime of for this state?

asked by Jacob on February 6, 2014
71. ## Physical Science

On which temerature scale does the average kenetic energy of molecules double when the temperature double?

asked by Rachel on February 27, 2008
72. ## Physical science

How much energy would be needed to warm 1.5 L of water from 0 °C to 25 °C? The specific heat capacity of water is 4186 J/kg/°C.

asked by Josh on February 5, 2013
73. ## chem

What is the energy of one mole of photons with a wavelength of 375 nm? (h = 6.63 x 10-34 J • s, N = 6.02 x 1023) A. 5.30 x 10-19 J B. 2.39 x 105 J C. 2.66 x 10-18 J D. 5.30 x 105 J E. 1.60 x 106 J

asked by trevor on November 18, 2008
74. ## science

A 100kg animal walks up a hill 67.5m high. How much potential energy has the animal gained

asked by kevaughn on November 15, 2014
75. ## Chemistry

The molar heat of vaporization of water is 42 kJ/mol. How much energy is released by the condensation of 3.0 g of water?

asked by Nathan on January 3, 2019
76. ## chemistry

determine the energy needed to cool 10 grams of H2O from 110 degrees C to -10 degrees C?

asked by tim on May 24, 2012
77. ## science

Suppose all of the apples have a mass of 0.10 kg. If one of the apples in the bowl (C) is 1.0 meter above the ground, what is its potential energy?

asked by Anonymous on January 17, 2014
78. ## chemistry

give the specific heat for aluminum is 0.900 J/g*c how much energy is required to raise 25.0 g of aluminum from 20.0 to 75.0

asked by sally on November 2, 2014
79. ## earth science

_____ currents assist in the transfer of energy from warmer climates to cooler climates

asked by dustin on May 25, 2015
80. ## physical science

How much energy would be needed to warm 1.5 L of water from 25 °C to 50 °C? The specific heat capacity of water is 4186 J/kg/°C.

asked by Josh on February 5, 2013
81. ## physics

A 4.0-uF capacitor is charged to 600 volts. how much energy is stored in the electric field of the capacitor?

asked by Cameron on March 9, 2014
82. ## Science

If a nickel is dropped from a building and no air resistance is present,how does the energy of the nickel change?

asked by Susie on February 21, 2017
83. ## Bio

How does the Calvin cycle make sugar from carbon dioxide? Where does the energy come from to drive this cycle?

asked by Anonymous on January 3, 2011
84. ## Physics

A capacitor of a capacitant is subjected to 2000V of p.d across its terminal. Calculate the energy stored in the capacitor?

asked by Ollyjay on March 6, 2013
85. ## Physics

A refrigerator has a coefficient of performance of 4.0. When removing 2.4x10^4 J from inside the refrigerator, how much energy is sent into the environment?

asked by Q on November 19, 2012
86. ## physics

how much is the energy stored in hooke's law spring increased when its stretch is increased from 8 cm to 16 cm? why is it 300%?

asked by mc on October 29, 2008
87. ## Physic

How much energy is required to change a 40 g ice cube from ice at -25°C to steam at 105°C? Answer in J.

asked by Renee on April 6, 2014
88. ## Science

If a nickel is dropped from a building and no air resistance is present,how does the energy of the nickel change?

asked by Susie on February 21, 2017
89. ## chemistry

Which material would you expect to have a greater bandgap energy between indium nitride and indium phosphide ?

90. ## physics

The politicians and the news media often warn us of an impending energy crisis. What is the crisis, what can be done about it, and how do you feel about it?

asked by Anonymous on August 18, 2010
91. ## Chemistry

find the heat energy needed to change 200 g of water at 4c to water at 88c

asked by Lezlie on February 14, 2013
92. ## chem

if 225g of water at 44.5^ degrees absorbed 3.66kj of energy what is the final temperature of the water?

asked by nico on May 16, 2012
93. ## chemistry 104

if a person uses 670 kcal on a long walk, calculate the energy used for the walk in kiljoules

asked by Anonymous on September 7, 2012
94. ## Chemistry

What is the total number of principal energy levels or shells in an atom with an atomic number of 30? and why? (1) 3 (2) 4 (3) 5 (4) 6

asked by danny123 on October 9, 2010
95. ## Chemistry

Calculate the energy of a photon of frequency 35.0 MHz (MHz is a mega hertz or 1 x 106Hz).

asked by Laura on March 2, 2013
96. ## chemistry

for an ionization energy vs. atomic number graph it is a relatively jagged graph as you go across a period. Why does this occur?

asked by Anonymous on July 27, 2010
97. ## chemistry

The molar heat capacity of silver is 25.35 J/mol⋅ ∘ C . How much energy would it take to raise the temperature of 12.0 g of silver by 18.6 ∘ C

asked by brown on October 10, 2018

Why do you feel fuller when you eat meat than you eat fruits? This is put with an energy assignment.

asked by Mom on September 12, 2011
99. ## chemistry

Co2(aq)->Co2(g) calculate the free-energy change for this reaction at 25 degrees Celsius.

asked by mar on February 1, 2015
100. ## chemistry

How do I construct an energy level diagram for the hydrogen atom. I have all the energies, but I do not know how to make the diagram.

asked by Jimmy on March 3, 2012