# Physics!

74,760 results, page 82
1. ## physics

A 70 ohm resistor is connected to a 6.7 V battery in the circuit below.When the switch is closed, calculate the current I. Answer in units of A.
2. ## Physics

A 20,000 kg vehicle is running at 80km/hr in a rotonda with a radius of curvature 25m compute for the centripetal force
3. ## physics

In the following list of periodic waves, which one is independent of the others: frequency, wavelength,speed,amplitude? Plese show all work Thank you
4. ## physics

A satellite orbits at an average altitude of h = 441 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 1024 kg.
5. ## physics

A motorboat traveling on a straight course slows down uniformly from 75km/h to 40km/h in a distance of 50m. What is the boat’s acceleration?
6. ## physics

A motorboat traveling on a straight course slows down uniformly from 75km/h to 40km/h in a distance of 50m. What is the boat’s acceleration?
7. ## physics

A uniform steel chain 20 m long and with a mass of 5 kg per m, hangs vertically. Compute the work required to wind it up
8. ## physics...one last time

A mortar elevated to 60 degrees scores a hit 15 m up a building 30m away. with what speed was the shell fired?
9. ## Physics

h_ttp:_//img215_.imageshack_.us/gal_.php?g=88875061_.jpg Anyone care to do....all the problems D:. Yes, I am desperate. (take away the underscores)
10. ## PHYSICS

What is the direction (vertical or horizontal) of the transmission axis of Polaroid sunglasses? Give the physical reason for your answer.
11. ## physics

three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)
12. ## Physics

Touching a Van de graff generator and slowly moves away from the dome why he touches it again he recives a stron shock why ?
13. ## physics

A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?
14. ## Physics

How much work is done by a boy weighing 450. Newtons while carrying a 20.0 kilogram package up a 2.00 meter flight of stairs?
15. ## physics

a man walks 8km North and then 5km in a. direction 60degrees. find its distance from his starting point
16. ## Physics

A myopic student is shaving without his glasses. If his eyes have a far point of 1.5, what is the greatest distance he can stand from the mirror and still see his image clearly?
17. ## physics

a rock with a mass of 2 kg is thrown from the top of a cliff 75 m high with a velocity of 10m/s. how much Kinetic energy does it have when it gets to the bottom?
18. ## Physics

A car starts from rest and accelerates uniformly at 2m/s2 for 10 sec . Find the velocity and displacement at the end of 10 seconds .
19. ## physics

The work done by non-conservative forces is equal to the total change in kinetic and potential energy. True or False?
20. ## PHYSICS

What is the direction (vertical or horizontal) of the transmission axis of Polaroid sunglasses? Give the physical reason for your answer.
21. ## physics

The gravitational field strength of an unknown planet is 15.5 N/kg on its surface. Calculate the value of g if the planets mass and radius were both doubled.
22. ## Physics??

A car is traveling at a speed of 62 on a freeway. If its tires have diameter 24.0 and are rolling without sliding or slipping, what is their angular velocity?
23. ## physics

If You do 100 j of work to elevate a bucket of water,what is its gravitational potential energy relative to its starting position?
24. ## physics

three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)
25. ## physics

A 326 g object is attached to a spring and oscillates with a period of 0.25 s. The total energy in this system is 5.83 J. What is the amplitude of the motion?
26. ## Physics HELP!!!

A ball is kicked at an angle of 50 with a velocity of 14m/s. a. how long is it in the air? b. how high does it rise? can someone please explain to me how to solve this???
27. ## College physics

A skier traveling at 30.9 m/s encounters a 21.5 degree slope. If you could ignore friction, to the nearest meter, how far up the hill does he go?
28. ## physics

Charge polarization is normally produced by ____________________. A) nuclear interactions.B) contact.C) induction.D) friction.E) electrostatic means.
29. ## physics

three resistors of 2ohm, 3ohm and 4 ohm are connected in (a) series (b) parallel. find the equivalent resistance in each case
30. ## physics

A quarterback threw a football at 27 m/s at a certain angle above the horizontal. If it took the ball 3.3 s to reach the top of its path, how long was it in the air? s
31. ## physics 11

a small 900kg sports car can deliver 100Hp to the pavement. how quickly can it reach 30m/s from rest?
32. ## physics

A chunk of Martian rock falls off of a cliff and drops 47.7 m in 5.00 s. What is the acceleration due to gravity on the surface of Mars?
33. ## physics

Calculate the average velocity for a remote controlled vehicle that starts with a speed of 1.0 m/s [forward] and then accelerates at 0.08 m/s2 [backward] for 4.0 s.

THANK YOU!! What is a combination of h (plancks constant), c(speed of light) and G (6.67x10^-11 Nm^2 / kg^2) that has units of length?
35. ## physics 101

What minimum speed does a 150g puck need to make it to the top of a 4.5m -long, 21degree frictionless ramp?
36. ## Physics

What magnitude of acceleration will result when 60N and 80N forces in opposite direction if applied to a 5kg body?
37. ## physics

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed?
38. ## physics

AC power in the United States has 60 cycles per second. What is the period (in seconds) for this current? Round your answer to 3 decimal places.
39. ## physics

A 0.5 kg air-hockey puck is initially at rest. What will its kinetic energy be after a net force of 0.3 N acts on it for a distance of 0.5 m
40. ## physics

Calculate the average velocity for a remote controlled vehicle that starts with a speed of 1.0 m/s [forward] and then accelerates at 0.08 m/s2 [backward] for 4.0 s.
41. ## Physics

Can someone help me with finding out the magnitude of the gravitational force a person with a mass of 67.5 kg would experience while standing on the surface of Earth? Thanx in advance.
42. ## physics

The car is travelling along the road with a speed of v  (300 / s) m/s, where s is in meters. Determine the magnitude of its acceleration when t = 3 s if t = 0 at s = 0. ( ans: a = 1.28 m/s2).
43. ## physics

A body moves along a straight line from rest with an acceleration of 2m/s². Calculate the time taken by it to cover a distance of 100m.
44. ## Physics

Measurements can be described as accurate and/or precise. Define accuracy and precision and give examples of how those terms could be used to describe a measurement.
45. ## Physics

A bullet fired target loses half of it velocity in penetrating 15cm .how much further it will penetrate before coming to rest
46. ## physics

which one of the property is true for mirror 1-refraction 2-refletion 3-communication 4-measuring length 5-gravity 6-heating object
47. ## physics

A body moving with a velocity of 3m/s is brought to rest by a constant force after travelling 15m, calculate the retardation.
48. ## physics

a basketball player achieves a hang time of 0.996 s in dunking the ball. What vertical height will he attain?
49. ## physics

What is the moment of inertia of a solid cylinder of radius R=0.9550m,thickness t= 0.015m, and total mass M= 3.565 kg?
50. ## Physics

If a space station must "provide one sixth the magnitude of the acceleration due to gravity on Earth" Can I use 9.81ms^-2/6 or is that too simple? Thanks.
51. ## Physics

What force is required to accelerate an object of 1.484x10^0 kg over a frictionless surface at -2.3580x10^0 m/s2 expressed to three significant figures.
52. ## Physics

A construction worker exerts 209N to move a load of bricks a distance of 10m across the parking lot,
53. ## college physics

Estimate the rotational kinetic energy of Earth, assuming it to be a solid sphere of uniform density.
54. ## Physics

Which of the following is an example of a baryon? a. meson b. electron c. lepton d. proton and neutron I saw a sight online that said A but on the notes my teacher had us copy it says D. It is d.
55. ## physics

An 87.0 kg fullback moving east with a speed of 5.0 m/s is tackled by a 83.0 kg opponent running west at 2.92 m/s, and the collision is perfectly inelastic.
56. ## physics

A loaded truck can accelerate at 3.2 m/s^2 It loses its load so that it is only 0.2 as massive. By what factor must the acceleration change for the same driving force?
57. ## physics

If Vx= 8.00 units and Vy= -6.40 unis, determine (a)the magnitude and (b)direction of ->V(vector) b) theta= ______ degrees below the positive x-axis.

How much does it cost to operate a 100 W lamp continuously for 1 week if the power utility rate is 8/kWh? answer in \$
59. ## Physics

Why would normal force be set to zero to calculate the minimum possible speed a rider can have at the top of a loop. Please i need help, this is due in few hours
60. ## physics

With what frequency would you have to push a child on a swing that had supporting chains that were 2.3 m long? Express your answer in Hz to 3 significant digits.
61. ## 11 physics

a20Kg box is suspended from the ceiling by arope that weighs 1Kg . find the tension at the top of the rope.
62. ## physics

A particle of mass 10 kg is slowly lifted up to a height of 10 metre then calculate the workdone by external and gravity force ?
63. ## physics

consider an electron near the equator. in which direction does it tend to deflect by the magnetic field of the earth if its velocity is directed a.northward
64. ## Physics

Rain drops hitting the side window of a car in motion often leave diagonal streaks if there is no wind. Why?
65. ## Physics

Where did the waste energy go to? A ball rolls off the ramp on the edge of a table heading downward and hits the ground.
66. ## physics

Two inelastic balls of masses 2 and 3 kg are moving at the velocities 8 and 4 m/s. Find the increase of the internal energy if the first ball catches up the second one.
67. ## physics

calculate the momentum ofa toy car weighing 200 gram and moving with a velocity of 5meter/second?
68. ## Physics

It takes you 9.5min to walk with an average velocity of 1m/s to the north from the bus stop to the museum entrance. What is your displacement?
69. ## physics

a long jump athlete take off at 25 degree with the horizontal and achieves a jumping distance of 9.12 m. Calculate initial take off speed.
70. ## physics

The pendulum swings past the pole 14 times in 21 seconds. The weight of the bob is 10g. Calculate the period?
71. ## Physics

A 26-lb. force vector that makes an angle of 101° counterclockwise from the -y direction. Determine the x and y components of the following three vectors in the xy plane.
72. ## Physics Help

An electron with velocity v = 2.4 × 106 m/s i encounters an electric field E = 1250 N/C i. How long will it take for the speed to be one fourth its original value?
73. ## physics

Five forces act on an object: (1) 60.0 N at 90°, (2) 40 N at 0°, (3) 80 N at 270°, (4) 40 N at 180°, (5) 50 N at 60°. What are the magnitude and direction of a sixth force that would produce equilibrium
74. ## Physics 1

A 1400 kg car traveling at a speed of 34 m/s skids to a halt on wet concrete where μk = 0.50. How long are the skid marks?
75. ## PHYSICS

A SPRING WITH A CONSTANT K = 8N/m IS STRETCHED 5CM AND RELEASED. IT BOBS UP AND DOWN EVERY 2.5 SECONDS. WHAT IS ITS FREQUENCY, PERIOD, ABD AMPLITUDE
76. ## physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?
77. ## physics

What mass would you hang on the right side of the system in the figure to balance it -- that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 30 cm and x2 = 12 cm.)
78. ## Physics

What power is needed to lift a 358 crate of bricks from the ground to the top of a 25.0 -high building in 1 minute?
79. ## physics

Peter Pan is suspended in space. He throws an entire jar of pixie dust to his left. Which way does he move?
80. ## physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?
81. ## physics

A body moves with uniform acceleration with a distance x for 1st sec. What is relation b/w x & y? A) y=24x B) y=16x C) y=12x D) y=8x
82. ## Physics

A skydiver has an air resistance force of 1193 N and a mass of 94 kg, what is her current acceleration? Take down to be POSITIVE and use g = 10 m/s/s. Please report your units as "m/s/s"
83. ## physics

find the change in momentum of a car weighing 1500kg when its speed increases from 36km/h to 72km/h uniformly
84. ## Physics

What is the gravitational field strength at a place 220km above Earth's surface, the altitude of many piloted space flights?
85. ## physics

a jogger does 2.5 *10^5 of work during an exercise routine. her internal energy decreases by 6.8*x10^5. how much heat did she absorb or give off?
86. ## physics

A car traveling initially at 7.41 m/s accelerates at the rate of 0.752 m/s 2 for 2.74 s. What is its velocity at the end of the acceleration? Answer in units of m/s
87. ## Physics

A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration.
88. ## physics

A female gymnast weighs 200 N. If she is hanging stationary from a high bar,how many forces are acting on her? A. one B.five C.four D.two E.three WOuld it be choice A or D?
89. ## PHYSICS

What is the acceleration (in meters/second^2) of a freely falling 73.0 kg sky-diver, if air resistance exerts a force of 273 N?
90. ## Physics B

A car slows down from 23 m/s to rest in a distance of 85m. What is its constant acceleration? I got -6.224, but a friend was telling me it's -3.11 and that I had to divide by 2. Why is that?

An airplane that can fly at 300 km/hr is flying at 210 when it is hit by a wind of 125 km/hr at 110. What is the new velocity of the plan?
92. ## physics

Find the time it would have taken a horse to run: displacement: +1609 m average acceleration: +0.0105 m/s^2 initial velocity: +16.58 m/s
93. ## physics

A loaded truck can accelerate at 6.4 m/s^2. It loses its load so that it is only 0.9 as massive. By what factor must the acceleration change for the same driving force?
94. ## Physics

A hiker shouts towards a vertical cliff 465 m away. The echo is heard 2.75 s. later. The wavelength of the sound is 0.750 m. What is its frequency?
95. ## physics

Charge polarization is normally produced by ____________________. A) nuclear interactions.B) contact.C) induction.D) friction.E) electrostatic means.
96. ## physics

What is the minimum work function for a metal for visible light (wavelengths between 400 and 700 ) to eject photoelectrons?
97. ## physics

The pulley in Figure P8.59 has a moment of inertia of 7.0 kg·m2 and a radius of 0.50 m. The cord supporting the masses m1 and m2 does not slip, and the axle is frictionless.
98. ## physics

A pendulum has a mass of 3.6 kg, a length of 2.1 meters, and swings through a (half)arc of 26.2 degrees. What is its amplitude to the nearest centimeter?
99. ## Maths, physics, chemistry,

The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g
100. ## physics

a car travelling at 60km/h uniformly retards for 10s and reaches a velocity of 45km/h. find the retardation.