# Math/Physics

208,687 results, page 68

### physics

an object moves along a circle of radius r. its start froam A and reaches B. what is the path length? what is the displacement?

### Physics

Find the length of an inclined plane that will reach a platform 8ft high and form 16degree with the ground

### Physics

Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2

### physics

Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2

### physics

a cyclist travels at a distance of 10.0 km. in 30 min. after w/c he speeds up to 40 km/hr for 6.0 more mins. Find his average speed.

### physics

a cyclist travels at a distance of 10.0 km. in 30 min. after w/c he speeds up to 40 km/hr for 6.0 more mins. Find his average speed.

### Physics

How long does it take for the current in an circuit with = 150Ω and = 65mH to reach half its final value?

### physics

A body of specific gravity 3.0 is immersed in water. What is the minimum force required to pull it out at velocity 2

### physics

determine the speed of a transverse wave in a string with length 2m, mass 60g under a tensionof 500N.

### physics

Determine the stopping distances for a car with an initial speed of 93 km/h and human reaction time of 3.0 s for the following accelerations: -4.00 m/s^2 -8.00 m/s^2

### physics

Calculate the kinetic energy acquired by a 11- nail when it is struck by a 540- hammer moving with an initial speed of 4.9 .

### physics

A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively.

### physics

A uniformly accelerated particle covers three successive equal distances in time intervals t1, t2 and t3 respectively.

### Physics

If a car is travelling with a constant speed of 5.53 m/s in the Westward direction, what is the resultant force acting on it? Ignore friction

### physics

How many times will the incident beam shown in Figure P25.3 (x = 1.10 m, y = 1.80 m) be reflected by each of the parallel mirrors? mirror on the right

### physics

Jen sit on chair , the angle of lower leg 30 degree lenhg 40 cm. calculater center of mass

### Physics

For the Law of Sines state the formulas, explain them in your own words, and draw a diagram illustrating one of them.

### physics

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal. How far does it move horizontally

### physics

a waterfall is 122 m in height. calculate the rise in temperature if all potential lost is converted to heat.

### PHYSICS

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal How far does it move vertically

### physics

A car traveling initially at 9.52 m/s acceler- ates at the rate of 0.609 m/s2 for 3.62 s. What is its velocity at the end of the accel- eration?

### physics

If a flea can jump straight up to a height of 0.310 m, what is its initial speed as it leaves the ground? How long is it in the air?

### Physics

Two vectors of magnitudes 25 N and 22 N act at right angles to each other. What is the magnitude of their resultant? Answer in units of N

### physics

a car traveling 7.0 m/s accelerates uniformly at 2.5 m/s squared to reach a speed of 12 m/s. how long does it take for the acceleration to occur?

### physics

a car traveling 7.0 m/s accelerates uniformly at 2.5 m/s squared to reach a speed of 12 m/s. how long does it take for the acceleration to occur?

### physics

a hockey puck is sliding freely across a pound of friction ice. What is the free-body diagram?

### physics

if you raise the temperature of 1000 grams of water by 17 degrees, how many calories of energy would you have added in

### physics

With an average acceleration of -.56 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 13.3 m/s to a complete stop?

### physics

if you walk for 46 minutes at a speed of0.91 meters per second, how far will you have traveled? convert to km

### physics

If I threw a ball vertically at an initial speed of 34.5 m/s, how many seconds would it take to reach its maximum height?

### physics

Measuring in foot pounds of toque what pressure can the world’s strongest man exert by pulling on an object?

### physics

A projectile is launched at a speed of 141m/s and an angle of 45 degrees. How fast is it moving at the top of its curved trajectory?

### Physics

An object is dropped from rest. What is its instantaneous speed when it has been in motion for 5 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s

### physics

A projectile is fired with an initial speed of 26.0 m/s at an angle of 30.0 above the horizontal. the object hits the ground 9.00 s later

### physics

Bobpursley; you helped me with my question and I am a little stuck how would I find distance if I don't know time and vice versa?

### Physics

An object traveling at a constant 20 m/sec in a circular path is changing its 1. velocity. 2. speed. 3. weight. 4. mass.

### physics

A projectile is fired straight up at a speed of 15 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 .

### physics

A projectile is fired straight up at a speed of 15 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 .

### Physics

five hundred kcal of heat is added to 2-kg of water at 80 degree Celsius. how much steam is produced?

### 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

### physics

the constant velocity of a ball is (3x+2y)m/sec. find the distance traveled in the y direction in 2 seconds (x and y are unit vectors)?

### physics

An airplane flies north at a constant speed for 6h and covers a distance of 2400km. What is the plane's velocity? The acceleration?

### physics

George takes off for a long jump at an angle of 28 degrees, and lands 6.9 m away. How fast was he when he jumped?

### physics

The force of tension of a rope is 300N. If a man is 50 m above the ground, what is the longest time it could take him to get to the bottom?

### physics

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

### physics

Find the amount of work done by a labourer,who carries 'n' number of bricks of mass 'm' kg each to the roof of a house of height 'h'.

### Physics

At the end of a race a runner decelerates from a velocity of 7.00 m/s at a rate of 0.500 m/s2. (a) How far does she travel in the next 14.0 s in meters?

### physics

A certain car can go from 0 to 100 km/h in 10 s. If the engine delivered twice the power to the wheels, how many seconds would it take?

### physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?

### physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?

### physics

if a todler is moving at 15m/s and covering a distance of 1900m. how much time does it take to cover this distnace?

### physics

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

### Physics

How long will it take a 1830 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?

### physics

a pitches takes 0.10 seconds to throw a baseball, which leaves his hand at a velocity of 30m/s. the balls acceleration is?

### physics

a pitches takes 0.10 seconds to throw a baseball, which leaves his hand at a velocity of 30m/s the ball's acceleration is?

### Physics

A 3.0 cmm high object is placed 10 cm from a concave mirror whose radius of curvature is 10 cm. Where is the image located?

### Physics

What minimum strength of magnetic field is required to balance the gravitational force on a proton moving at speed 6*10^6 m/s?

### physics

Two asteroids, each with a mass of 6 million kilograms are attracted gravitationally with a force of 0.75 N. How far apart are their centers?

### Physics

Approximately how long does it take for an oxygen molecule to diffuse across the interior of a cell that is 230 ì m in diameter?

### physics

The specific heat capacity of pure water at 15.0 degrees celsius is 4184J/(kg.k). Convert this to kcal/(kg.k). pls help

### physics

How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s?

### physics

How much centripetal force is needed to keep a 0.20 kg ball on a 1.50 m string moving in a circular path with a speed of 3.0 m/s?

### physics

radius of the earth = 6.37 × 10^6 what is the speed of a 90.6 kg person at the equator? I know that F=m(v^2/r) but I don't know the force. Is there another equation that I'm missing or I'm using the wrong one? Thanks

### physics

a hlicopter takes off and travles 300 km due north then returns to its landing field. what is its displacment?

### physics

How long will it take a 1030 W motor to lift a 330 kg piano to a sixth-story window 13.0 m above?

### physics

What is the minimum velocity needed for a roller coaster , traveling on the ground , to make it over a 112 m hill?

### honors physics

What is the minimum velocity for a tolerant coaster traveling on the ground to make it over 112 m hill

### 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?

### Physics

calculate the initial speed of a bicyclist whose final velocity is 20m/s if he accelerates at a rate of 2 m/s2 in 5 seconds?

### physics

compute the least acceleration with which a man of mass 75 kg can slide down a rope which can sustain a weight of 580 N

### physics

Time() 0 2 4 6 8 10 12 14 16 Velocity() 0 0 2 5 10 15 20 22 22 By measuring the slope of your curve, find the magnitude of the instantaneous acceleration at times = 9s i don't know how to solve it

### physics

An airplane reaches a velocity of 71m/s^2 when it takes off. What must its acceleration be if the runway is 1.0km long

### physics

Who developed modern periodic table? Descibe particle arrangements & movement for each phase of matter. (Thank you for helping me)

### physics

An object is dropped from rest. What is its instantaneous speed when it has been in motion for 8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s

### College Physics

An electron and a proton are a distance r = 8.5 × 10-9 m apart. How much energy is required to increase their separation by a factor of 6?

### physics

A 60kg boy is riding his bike to school. His acceleration is 15 m/sec^2. Determine the magnitude of the force he is exerting.

### Physics- moles and gas laws

What is the volume occupied by 8.0 g of hydrogen under a pressure of 2.8 atm and a temperature of 300 K?

### physics

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?

### physics

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor?

### physics

An object is to be thrown through a window 3.5 m high a distance 7.5 m away. It is launched at an angle 70 degreesabove the horizontal.

### physics

Why is there always a difference between the experimentally calcuated error for resistance, and the actual components tolerance value?

### Physics

How much work is done by a girl weighing 450N while carrying a 2kg package up a 2m flight of stairs?

### physics

5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

### physics

5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

### Physics

1. Explain how the ff. works: a. ultrasound imaging device b. photocopying machine c. microwave oven Thank you so much in advance! :)

### principles of physics

Calculate the change in potential energy of 7.8 million kg of water dropping 50 m over Niagara Falls.

### physics

jeritex mass is 60kg. if he climbs up the flight of stairs 13 meters high in 20 seconds, what is his power output?

### physics

a race car's velocity increases from 4 m/s time interval, its average acceleration would be 10 m/s2 ? true or false ?

### physics

if a race car's velocity increases from 4 m/s to 36 m/s over a 4 s time interval, its average acceleration would be 10 m/s 2 ? IS THIS TRUE ?

### physics

If you pull one end of the rope 1.0 m downward with a 50 N force, find the height you can lift a 150 N load.

### Physics

What is the magnitude of buoyant force acting on a 720 cm^3 toy submarine floating in fresh water? (D_water =1 g/cm^3)

### Physics

Sunlight strikes a fused quartz surface. At what angle of incidence is the reflected light completely polarized?

### Physics

What minimum speed does a 100 g puck need to make it to the top of a 5.9 m-long, 29 degree frictionless ramp?

### physics

What is the power delivered by a motor lifting an elevator weighing 1250kg up 89 floors at 16.8 meters per second

### Physics. PLEASE HELP!!

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

### Physics

Our eyes are sensitive to electromagnetic radiation with wavelengths from 400nm to 700nm. What is associated range of frequencies?

### physics

A motorcyclist increases her speed along a straight road from 0 to 120 km/hr in 5 seconds. How much acceleration does she experience

### physics

The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be

### physics

Which of these two bodies gets its internal heat from nuclear processes? A) Both.B) Sun.C) Neither.D) Earth.