# Math/Physics

215,130 results, page 57

1. ### physics

Consider the following specific case of the system described in the example above. Suppose the angle θ is 78.0° and the mass of the ball is 7.00 kg.
2. ### Physics

how much work is needed to stop a 20kg bullet moving with a speed of 150m/s?
3. ### physics

A 1.0kg ball initially at rest rolls down a plane at 35 degrees. pls i really need help
4. ### physics

three point charges-1*10^-6,-2*10^-6,3*10^-6.one kept at corners of an equilateral triangle of side 1m.what is potential at centre
5. ### Physics

A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it?
6. ### PHYSICS

how far will a 1000kg car travel in 10 sec if it is accelerated from rest by a force of 5000N
7. ### Physics

Write each number in scientific notation: 1) 15.01 ans. Is it 15.01 x 10 minus to the power of 2?? Am i wrong?
8. ### Physics

A 1.21 kg block slides down a 25.0 m long 25.0° incline at constant velocity. How much work is done by friction?
9. ### physics

A 8.20 cm tall object is placed 30.0 cm in front of a concave mirror with a focal length of 4.20 cm. What is the magnification?
10. ### physics

What is the charge of a bare Magnesium nucleus (no electrons, just the protons and neutrons) in Coulombs?
11. ### physics

A bullet is fired in to s wall losses half of its velocity after penetrsting 3m.how much further will it penetrate.
12. ### physics

a car accelerates along a straight road from the rest to 90 km/h in 5 s what is the magnitude of its average acceleration
13. ### Physics

What happens to your tongue when you lick an aluminum ice cream scrapper just after it has been used? Does it stick to the scraper? Why?
14. ### physics

Describe an experiment to determine the boiling point of a small quantity of a liquid
15. ### physics

On planet Mars, A pendulum has a length of 4L and period of 5T.what is the acceleration due to gravity ?
16. ### Physics urgent

What is the weight of a 76 kg astronaut on the Moon where the value of 'g' is only 17% the strength of 'g' on the Earth? (Answer should be expressed in N).
17. ### physics

What is the downward force on a ball with a mass of 7.5 x 10^-1 kg thrown in the air due to gravity?
18. ### Physics

What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?
19. ### Physics

A meteoroid is speeding through the atmosphere, traveling east at 19.0 km/s while descending at a rate of 12.9 km/s. What is its speed, in km/s?
20. ### Physics

How can grounding prevent property damage and harm, even death when lightning strikes?
21. ### Physics

Calculate the potential energy of a 5.0 g (0.005 kg) paper airplane 5.0 meters above the ground
22. ### physics

if a bowling ball with a 22 cm diameter is half way submerged in a bucket of water, what is its mass?
23. ### Physics

How much does it cost to operate a 23-W porch light for 24 h if electric energy costs 8¢/kWh?
24. ### physics

determine the energy of a photon radio wave electromagnetic radiation. i know which formula to use 6.64*10^-34 what
25. ### Physics

What is the angular momentum (in J*s) of a mass of 1.45 kg which completes an orbit about a point 23.0 meters away every 5.30 seconds.
26. ### College Physics

What is the work required to move a proton 1 cm along the 7 volt equipotential line?
27. ### physics

Which parameter of a projectile depends on the horizontal as well as the vertical component of velocity of projection?
28. ### physics

A man walks 5.0m due east and then 10.0m N30oE . Find his resultant displacement
29. ### physics

A spaceship has a momentum of 20,000 kg·m/s to the left; its mass is 500 kg. What is the magnitude of its velocity?
30. ### physics

what is the force of gravity on a mass of o.5kg hanging by a string in a beaker of water
31. ### physics

if an object is pushed along a rough horizontal surface and moves at a constant velocity, then...
32. ### Physics

Another pendulum swings to and fro at a regular rate of two times per second. Show that its period is 0.5 s.
33. ### physics

From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/h?
34. ### Physics

How many joules would be required to raise the temperature of 20g of ice at oC to water at15C?
35. ### Physics

If I dropped a bowling ball from the empyre state building, at what velocity would it descend?
36. ### Physics

coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ?
37. ### Physics

What acceleration will you give to a 24.9 kg box if you push it horizontally with a net force of 82.8 N? __________ m/s2
38. ### physics

How would you find the coefficient of kinetic friction if you're given a weight of 627 N and theta=45 degrees?
39. ### physics

A car traveling at +7.2 m/s accelerates at the rate of 0.65 m/s 2 for an interval of 2.4 s. Find vf . Answer in units of m/s
40. ### physics

A car traveling at +6.3 m/s accelerates at the rate of 0.65 m/s^2 for an interval of 2.2 s. Find vf . Answer in units of m/s
41. ### Physics

Air in a balloon does 25 J of work while absorbing 81 J of heat. What is the change in internal energy?
42. ### more physics

in the equation P= 2m/ ne^2 t what do these symbols mean? p - resistor m - mass of e- n - ?? e - electron charge>?? t - time between collisions??
43. ### physics

how much heat is required to change 400g of ice at -20c into steam at 120c
44. ### Physics

What are some of the safety considerations and technologies used in designing a safe roller coaster ride?
45. ### physics

How long would it take for a stone to fall 250m traveling at a speed of 10m/s squared?
46. ### physics

A car starts from rest and accelerates for 6.7 s with an acceleration of 1.6 m/s2 . How far does it travel? Answer in units of m
47. ### physics

Explain the changes in frequency with respect to changes in mass, length tension on sonometer bridge.
48. ### physics

Calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50meters above the surface.
49. ### physics

a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
50. ### Physics

What is the instantaneous speed in m/s at the 10 s mark for a car that accelerates at 3 m/s(squared) from a position of rest?
51. ### Physics

A gas initially occupies 4.5L at 350k and 22kPa. How many moles and molecules are present?
52. ### physics

Calculate the period of a ball tied to a string of length 0.3 m making 1.9 revolutions every second.
53. ### Physics

If 9.30 x 10^5 J of energy are transferred to 2.00kg of ice at 0 deg C, what is the final temperature of the system?
54. ### physics

an aluminium sphere of 20cm diameter is heated from 0¡ãc to100¡ãc. what is the change in its volume?
55. ### physics

would someone in a lift feel lighter or heavier as it accelerated upwards? explain your answer.
56. ### physics

if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?
57. ### physics

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
58. ### physics

How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
59. ### physics

Which of :acceleration,age,speed,temperature,and velocity are vector quantities? Are any of them scalars?
60. ### physics

A 2.40- bullet embeds itself in a 1.20- block, which is attached to a spring of force constant 770 .
61. ### Physics

How might the poor fellow stranded in the desert benefit from a pair of Polaroid sunglasses?
62. ### physics

what must be the mass of the log to be lifted up by the hand, if the muscle cross sectional area is 17 cm^2?
63. ### Physics

90.0g of copper (c=390J/kg*oC) at 80.0°C are added to 270g of water at 20.0°C. What is the final temperature of the mixture?
64. ### physics

how much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?
65. ### physics

a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object
66. ### physics

How much work is needed to stop a 20g bullet moving with speed of 150m/s
67. ### physics

An airplane starts from rest and accelerates at 11.5m/s^2. What is its speed at the end of a 655m runway?
68. ### Physics 11U

can a initial velocity from the average acceleration formula (Aav=Vf-Vf/t) be negative?
69. ### physics

A car starts from rest and accelerates for 6.5 s with an acceleration of 3.6 m/s2. How far does it travel? Answer in units of m
70. ### physics

a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground?
71. ### physics

Can you find the pressure exerted on the floor by the heel if it has an are of 1.50 cm^2 and the woman's mass is 55kg?
72. ### Physics

When dealing with circular motion; a string with the length of .4m is being spun horizontally, is the radius .2m?
73. ### Physics

The electron-volt is _____ than the SI unit for the same physical quantity. a. smaller b. greater
74. ### physics

A wheel has turned through 120 revs in 10 s after starting. find the angular acceleration.
75. ### physics

Estimate the magnitude of the electric field in a cell membrane with a thickness of 8nm
76. ### physics

Which consumes more energy, a 1.5 kW hair dryer used for 10 min or a 10 W night light left on for 19 hr?
77. ### Physics

gazelle traveling 200 m/s is launched at a 40 degree angle with respect to the horizontal.
78. ### Physics

coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ?
79. ### Physics

The speed of a train increased from 20 mi/hr to 30 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2
80. ### physics

If you are driving 100 along a straight road and you look to the side for 1.9 , how far do you travel during this inattentive period?
81. ### Physics

If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?
82. ### physics

How much current flows through two resistors with resistances of 10 Ω and 20 Ω that are connected in series and to a 10 V power supply?
83. ### Physics

Calculate the hang time of an athlete who jumps a vertical distance of 0.75 meter.
84. ### Physics 1

(II) How close to the edge of the 20.0-kg table shown in Fig. 9–47 can a 66.0-kg person sit without tipping it over?
85. ### physics(measurement)

What accurate method can be used to determine the thickness of a coin. Explain pls..
86. ### physics

Why is parallax method not useful for measuring the distances of stars more than 100 light years away?
87. ### Physics

what is a planes velocity if ithas anair speed of 18 and there is a 30 km/h wind blowing south
88. ### Physics

Ok why would it be necessary for someone to measure oscillations from a 20 cm mark of a suspended ruler as oppose to the center of mass?
89. ### physics

the two crates 40-kg and 60-kg are to be accelerated upward to a ship at the rate of 0.30-m/s2 determine the tension in each rope ?
90. ### Physics

What is the tension in a 1-meter string that is spinning a 0.5-kg rock in a horizontal circle 3 times per second?
91. ### physics

Calculate the quantity of heat required to raise the temperature of 2.00 g of water 4.00◦C.
92. ### Physics (HELP)

A real image is usually inverted, but can be upright in special cases. True or false?
93. ### physics

How much heat must be absorbed by a 500 g pot of water in order to raise the temperature from 20„aC to 30„aC?
94. ### Physics (HELP)

The index of refraction of diamond is 2.42. What would be the speed of a light wave passing through a this medium? 8.1 x 10 ^-9 m/s 1.2 x 10^8 m/s 7.3 x 10^8 m/s 9 x 10^-9 m/s
95. ### physics

How much spring elasticity would be needed to make a 50 pound child jump higher
96. ### physics

how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?
97. ### physics

What are the dangers associated with electricity in your home? What can be done to limit or prevent the possibilities of dying or getting hurt?
98. ### Physics

Calculate the force acting on a body of mass 10 kg moving with a uniform velocity of 2m/s.
99. ### Physics (HELP)

An object inside of the focal point of a concave mirror produces an image that is...
100. ### Physics

Charges q1 and q2 lie on x axis at points x= -a and x= 5, respectively. (a) how must q1 and q2 be related for the net force on charge +Q at x = a/2 to be zero ? (b) and if +Q is placed at x = 3a/2.