130,975 results, page 5

1. ### physics 12

im stuck i have no clue where to start, please help me i just know the givens and some claculations. question: kevin stands on he top of a buiulding and he throws an aboject up into the air at a velocity of 16.0m/s at an angle of 25 degrees to the horizontal. if the building ...
2. ### Physics

The sun outputs 1380 W/m^2 of energy at the earth's surface. A small rectangular las has the following dimensions: 1km wide, 1.4km long, and 300m deep A) Calculate the thermal energy added to the lake if exposed to 12h of direct sunlight. B) calculate the increase in ...

Ok so I did what you told me reiny but I cant figure out number three which is here 10x - 2 - 6x = 3x - 2 + x Please show how You did it please?

5. ### Physics

I had this question last night for Dr. Bob-A fox sees a piece of carrion thrown from a nest 14 m high and goes to get it. Carrion is thrown 1.5 horizontal velocity. Fox is 7. m from base of tree. What is mgnitude of fox's average velocity if it grabscarrion just as it touches ...

A fire hose held near the ground shoots water at a speed of 6.5 m/s 1. At what angle(s) should the nozzle point in order that the water land 2.5 m away? -I believe the answer is 18,72 2. Sketch the trajectory for the 18; angle -Please give me exact (x,y coordinates) -I believe...
7. ### English

1. Please make yourself at home. 2. Please make yourself comfortable. 3. Please make yourself relaxed. 4. Please make yourself _______. 5. Take it easy. ================ Are they all the same in meaning? Can We use other expressins which are suitable for the blank? Some other ...

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min (b) 10.0 m min Please ...
9. ### Physics

Estimate the total binding energy for copper. 550 MeV Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons. E= in Joules Please help me out I got 1st part I need the Energy in joules am confused please help me out...thanks
10. ### physics

object kicked at 45 degree and travels 82 m b4 hitting the ground. what was its vo? how long was it in the air? how high did it go? please and thanks
11. ### physics

Rubidium forms the postive Rb+ Is this ion larger or smaller then the neutral atom? Explain PLEASE
12. ### Physics

Can someone please tell me how to calculate the percent of error for a set of data points? thanks so much!
13. ### Physics

Can someone please tell me how to calculate the percent of error for a set of data points? thanks so much!
14. ### PHYSICS

Can someone please tell me how to calculate the percent of error for a set of data points? thanks so much!

how do you rearrange this equation weight=T1sin57+[T1cos57/cos23.5]xsin23.5 when you're trying to isolate T1?????
16. ### need physics help

d=2.1 a=? vi=0 and t=.60 and i have to use the formula d=vit+1/2at^2, how do i do this? can you please show work so i can understand.
17. ### physics

What is the period of the hand on a clock that measures the minutes? What is the frequency? Please show work, Thank you, Abbie

20. ### Physics

can you please help me in telling me the uses of each electromagnet wave? like explain each briefly and what are they used for? thankyou
21. ### PHYSICS HELP

1 1200kg car is accelerating at 1.6m/s/s. If the coefficient of friction is .15, what is the force supplied by the engine? please help! urgent!
22. ### physics

show that none of the principal moments of inertia can exceed the sum of the other two Please help me thank you
23. ### Physics

How far above the surface of the earth would you have to be before your weight is reduced by 12.89%? Please Help !

How much time does it take a pulse of light to travel through 120 m of water?
25. ### Physics

Calculate the total energy of 4.0 kg object moving horizontally at 20 m/s 50 meters above the surface. Please help me!!!!!
26. ### Physics (fix)

In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?
27. ### physics

What is the momentum of the 200 g cart BEFORE the collision (LEAVE OUT units of kgm/s)? please help.
28. ### physics

Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help
29. ### Physics HELP ME PLEASE

A 1250 kg car increases it's speed from 11 m/s to 27 m/s in 5.4 s. - What is the cars acceleration? - How much force is required?
30. ### physics

Liquids exert pressure at Right Angles to the surface of container.Please explain this with an example

Calculate the allowed wavelengths for the emission of a photon initially in the n=3 state in a hydrogen atom
32. ### physics

Fall time under g is sqrt 2h/g. Can someone give a derivation from the equations of motion please? Thanks.

the potential difference across a load is 9V. explain what this means in more fundamental terms.
34. ### physics

damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!
35. ### Physics

What is the centripetal acceleration of an automobile driving at 40 km/h on a circular track of radius 20m? Help ASAP please!!!
36. ### Physics

Identify the correct neutrino (Ve, Vµ, Vτ or their anti-particles) a) π+ —> p° + e+ + v b) π+ —> p° + µ+ + v c) τ+ —> e- + v + v Please explain why too...I'm really lost. I'd appreciate any help.
37. ### Physics

Identify the correct neutrino (Ve, Vµ, Vτ or their anti-particles) a) π+ —> p° + e+ + v b) π+ —> p° + µ+ + v c) τ+ —> e- + v + v Please explain why too...I'm really lost. I'd appreciate any help.

Ive tried using the formulas my teacher gave me, however I can't seem to get the right answers. Please help! A 1.4-kg block hangs from a spring. A 363-g body hung below the block stretches the spring 2.6 cm farther. What is the spring constant? When the 363-g body is removed ...

ok, i need help w/ this problem. (4x^3 + x^2 + 3) + (x^3 + 2x^2 +1) can u please explain how to do this please? i'm very lost. Thanx! -Ally

45. ### HELP!

The problem using elimination/substitution methods what is the solution set to 3x -2y =-4 and 5x=2y the choices a)(2,-5) b)(-2,-5) c)(2,5) d)(-2,5) Please, Please, Please, HELP! Between a and c I believe it is c is that correct? Yes.
46. ### english

How do you diagram the sentence, My dad is mean, he makes me do push up, someone stop him before I die, please, please, please!

48. ### math

please can you answer this is all about sums and differences of rational algebraic expression...please i need it please ?this is the problem....3/5+4/5=? another x/3-y/3=? another is 7/a+2/a
49. ### physics

A boy sitting on the edge of a vertical cliff fires a rock with a slingshot at a velocity of 16.45758956 m/s and an angle of 59.78 degrees above the horizontal. The rock lands in a lake at the base of the cliff, a horizontal distance of 89.67 meters beyond the base of the ...

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 = -.825 ball 2...
51. ### physics

Two hypothetical planets of masses m1 and m2 and radii r1 and r2, respectively, are nearly at rest when they are an infinite distance apart. Because of their gravitational attraction, they head toward each other on a collision course. Note: Both the energy and momentum of the ...

In the quantum mechanical picture of the hydrogen atom, the orbital angular momentum of the electron may be zero in any of the possible energy states. For which energy state must the orbital angular momentum be zero? n = 1 n = 2 n = 3 n = 4 Give your reasoning. I am not sure ...

54. ### Science

Solve the system of equations algebraically. Show all of your steps. y=x^2+2x y=3x+20 Can someone please explain to me how to do this? I want to actually learn it, please. Thanks! :)
56. ### PHYSICS HELP PLEASE !!!!!

A mass of m1 = 12 kg is placed on an incline with an inclination angle of 50 degrees, a coefficient of kinetic friction of 0.16, and a coefficient of static friction of 0.89. m1 is tied to a rope which runs parallel to the incline and runs over a pulley to a hanging mass of m2...

A 16kg sled starts up a 28 degree incline with a speed of 2.4m/s . The coefficient of kinetic friction is = 0.27. part a)How far up the incline does the sled travel? part b)What condition must you put on the coefficient of static friction if the sled is not to get stuck at the...

A 16kg sled starts up a 28 degree incline with a speed of 2.4m/s . The coefficient of kinetic friction is = 0.27. part a)How far up the incline does the sled travel? part b)What condition must you put on the coefficient of static friction if the sled is not to get stuck at the...
59. ### College Physics

A speck of charged dust with a mass of 39mu g. is kept levitating by putting it in an electric field. If you must apply a field of 10 N/C to keep it suspended in mid-air, what is the charge on the speck of dust? Can someone please help soon? I got this wrong on my last test ...

1) Find the period and the amplitude. y= 3 sin 2x Please explain!!! I do not know how to do this.
61. ### Math

How to convert into polar form? z = 1 - i w = 1 - √3i

64. ### English

1. Help me, please? 2. Will you help me, please? 3. Help me, please. ------------------------- Does #1 mean #2? Because of the question mark, #1 is different from #3, right?

Can you please explain your answer. How did you get blue lamda. Is it because red and green makes blue? How do I find the value of blue lambda? A mixture of red light (vacuum = 661 nm) and green light (vacuum = 551 nm) shines perpendicularly on a soap film (n = 1.35) that has ...
66. ### Physics-Kinetic energy

Two 2.0 g bullets are fired with speeds of 40.0 m/s and 80.0 m/s, respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic energies? A car has kinetic enery of 4.32* 10^5 when traveling at a speed of 23m/s. What is...

CONVERT : 1.67KG =___MG 2.70MM=___KM 3.55 DAYS=___MINS 4.37 FAHRENHEIT=___KELVIN BETTER IF WITH SOLUTIONS PLEASE AND HOW TO DO PLEASE

The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much more time is required ...

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 ball 2 (b) ...
70. ### physics

DRWLS: PLEASE SEE ADDITIONAL INFO AT THE BOTTOM its the second part of the question that I don't understand: according the graph shown, the net force acting on an object varies wth the object's displacement. Calculate the work down by the force on the object at the various ...
71. ### Physics

i saw this question from physics book, can someone please help me solve this.. thank you.. A man pulls a 500 Newton block up a plane inclined 300 with the horizontal with a force of 300 Newton parallel to the plane. What net force tends to pull the block up the plane?
72. ### Plz help Physics-bobpursley

A 200W lamp is totally immersed in 1500gm of water. How much will the temperature of the wtaer rise in 3 mins? Neglect heat losses from the water. Please don't put names in the subject...you limit yourself to who can respond, when others may be able and available. Again, ...
73. ### physics help me please!

A certain wave is incident on an interface at an angle of 40 deg. The wave emerges into the other material at an angle of 30 deg. Crossing the interface, the wave: a. increased speed b. reduced speed c. maintained constant d. more info is needed I think reduces its speed, but ...

4.A mass of one kg of nickels has a monetary value in the US \$ of approximately: a. \$1 b. 10 cents c. \$10 d. \$1000 is it c?
75. ### physics Again

bobpursley can you please check my reply to your post about my question? I am not sure if I did my equation correctly. Thanks
76. ### physics

Calculate the energy released in the fusion reaction 2 3 4 1 1 H + 1 H->2 H +0 n. The atomic mass of 3 1 H (tritium is 3.016049 u. I am lost! help please!
77. ### Physics

calculate the magnitude of the resultant of a pair of 100-km/h velocity vectors that are at right angles to each other. Please help me! thanks!
78. ### physics

a guy throws a ball up and catches it 3.5 seconds later. what is the max height and initial velocity. Please help!

how do you measure uncertainy?? for instance.. if the average was .15 and the highest value among the data was .16 and the lowest is .13... how do you find the +-??

81. ### PHYSICS

The force applied by the e-brake is F(eb) = m*a(eb) = -8.13*1452 = -12,100 N I didn't get the same answer - I got 11,804.76....please check
82. ### physics (electric charges)

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
83. ### physics (electric charges)

Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
84. ### physics

what is your age in seconds? this is a conversion problem. someone help please with all the multiplication and division... very confused. THANK YOU
85. ### Physics

the relationship between linear speed and net force is inverse right? can someone explain why to me please.
86. ### physics

What is the mass of a lead sinker witha volume of 3cm3? please show work I calculated 11.3*3 = 33.9 Is this correct.. Thank you.
87. ### physics hw urgent please

show how you would you arrange to find f in terms of v,m and r from four equations below. f=1/t, f=ma,v=2piR/T,a=v^2/R Thanks
88. ### science physics

i don't get how to solve this please help me Two resistors, 47 Ù and 82 Ù, are connected in series across a 45 V battery. What is the current in the circuit?

Find the power input of a force F=(7 N)ˆý + (3 N) ˆk acting on a particle that moves with a velocity v = (6 m/s)ˆý. Answer in units of W

When a 0.35 kg baseball is hit, its velocitychanges from 21 m/s to -29.5 m/s. What is the magnitude of the impulse de-livered by the bat to the ball? Answer in units of N · s

When the object is placed beyond 2f, where should you put your eyes for getting the clear image of it?

93. ### Basic Physics

I don't understand how to work this problem out: Find x-component of vector a ⃗ = (7.0m/s 2 , - y-direction) Please help
94. ### physics

car doing 60 mph and skids for 52.3 meters what is the speed at end of skid co/friction is 0.693 urgent help please
95. ### Hurricane Project for Physics Class

1) Please describe the typical path(s) for hurricanes. Is this part of the pattern of convection?
96. ### PHYSICS

without air resistance maximum range of projectile is obtained with an angle of ???? Can you please fill in the blank THANK YOU
97. ### physics

please help The power rating of an electric motor which draws a current of 5 amperes from a 240-volt line is? a. 12.0 kW b. 1.2 kW c. 48.0 kW d. 4.8 kW
98. ### Physics

What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.
99. ### Physics

What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm.
100. ### physics

(needed for my strain calculations) is the percentage uncertainty in a ruler 0.1cm or 0.1mm? Please answer quick.