# phyics

166 results

### phyics

convert 36cm/min to km/h

### phyics

suggest what will happen to the bucket

### phyics

Calculate (in MeV ) the binding energy per nucleon for 40 Ca .

### Phyics

Why does the emission spectrum of an element consist of discrete wavelengths

### phyics

Calculate the specific gravity of a liquid given the following information: m = 59.30 g, mA = 33.78 g, mL = 43.60 g.

### Phyics

How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28° incline plane?

### Phyics

The internal energy change in a system that has absorbed 4 Kcals of heat and 1000 J of work is:

### 1th phyics

A car traveling at 7.5 m/s accelerates 3.4m/s2 to reach a speed of 15.0 m/s. How long does it take for this acceleration to occur?

### phyics

_________ was the first to show that all objects fall toward Earth with constant ____________.

### phyics

a 1350 g projectile is launched with a force of 150N. the length f the firing arm is 1.25 m . determine the velocity

### Phyics help please varify the answer is correct

A parallel circuit has value of RT = R1 // R2 // R3. If one resistor opens, RT RT increases?

### phyics

find the acceleration if the velocity changes from: a) 2m/s to 4m/s in 4s b) 5m/s to 10m/s in 2s c) 100m/s to 120m/s in 5s d) 86m/s to 94m/s in 4s e) 21m/s to 35m/s in 18s thank you!

### Phyics

Sue is swinging a yo-yo around her head. What happens to the size of the centripetal acceleration if the mass of the yo-yo is doubled without changing the period or length of the string?

### phyics

How far (in meters) above the earth's surface will the acceleration of gravity be 34.0 % of what it is on the surface?

### phyics

The choroid and the auricle are similar because, one collects light and the other collects sound?

### phyics

For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement?

### phyics

a dog runs at a speed of 4m/s how many minutes does It take the dog to go 1 km?

### phyics

a SHO has a maximum speed of 5m/s. How fast will it be going when the potential energy is seven-ninths of the kinetic energy.

### phyics

calculate the gravitational force between a student with mass (60kg) and her desk (5kg) if she is sitting .2m from her desk

### PHYICS

A Football is kicked 66.6 meters in 5.39 seconds. What was the initial velocity it was kicked? magnitude and direction above horizontal

### phyics

dicusselastic collision in one dimension.Obtain expression for velocities of two bodies after such a collision

### phyics

An electron and a proton are placed at rest in a uniform electric field modulus equal to 520N / C. Calculate the speed of each particle of 48 ns after the latter has been released

### phyics

An electron and a proton are placed at rest in a uniform electric field modulus equal to 520N / C. Calculate the speed of each particle of 48 ns after the latter has been released

### Phyics

Bob heads out into a lake at an angle of 41◦ with respect to the shore. If his boat is capable of a speed of 1.7 m/s, how far from land will he be in 7 min and 17 s ? Answer in units of m.

### phyics

An object in simple harmonic motion has an amplitude of 0.202 m and an oscillation period of 0.620 s. Determine the maximum speed of the motion

### Phyics

An object in simple harmonic motion has an amplitude of 0.202 m and an oscillation period of 0.620 s. Determine the maximum speed of the motion.

### phyics

If the coefficient of static friction between the board and the wall is 0.81, what is the least force you can apply and still hold the board in place?

### 11th phyics

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s

### PHYICS NEED HELP BAD!

A football is kicked 66.6 meters. If it is in the air for 5.39 seconds, with what initial velocity was it kicked? magnitude and direction above horizontal

### phyics-universal gravity

A hypothetical planet has a radius 3.3 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? (downward)

### PHYICS

Pick the radioactive isotope in each set 14/7 N OR 23/13 AL EXPLAIN A)its atomic number is greater than 83 B)it has fewer n than p in the nucleus C)it is an odd-odd nuclide none of the above

### phyics

Find the horizontal range of a baseball that leaves the bat at an angle of 63 degrees, with the horizontal with an initial velocity of 160 km/hr. discard air resistance

### PHYICS

a turn table is turing at a rate of 45 rad/sec and comes to rest after 5 second.how many rotation does it make before coming to rest?

### phyics

Pick the radioactive isotope in each set. 23/11 20/9 Explain your choice. a)its atomic number is greater than 83 b)it has fewer n than p in the nucleus c)it is an odd-odd nuclide none of the above

### Phyics

One of the concrete pillars that supports a house is 1.9 m tall and has a radius of 0.55 m. The density of concrete is about 2.2 x 103 kg/m3. Find the weight of this pillar in pounds (1 N = 0.2248 lb).

### phyics

A very long 1.75 cm diameter glass rod has one end ground and polished to a convex spherical surface that has a 7.30 cm radius. The glass material has an index of refraction 1.56.

### phyics

You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude of 65 N·m. Using the data in the figure, determine the magnitude F of the force that you must exert on the wrench.

### phyics

The figure shows a person whose weight is W = 500 N doing push-ups. Find the normal force exerted by the floor on (a) each hand and (b) each foot, assuming that the person holds this position.

### Phyics

A ray of light strikes a mirror at an angle of 26 degrees to the normal. What is the angle of reflection? Answer in units of degrees .

### Phyics

A particle, which starts from rest, covers a distance of 19.94 cm in the first 8.6 seconds. Find the acceleration (in m/s2) of the particle at the end of 8.6 seconds.

### college phyics

The position of an object changes with time according to the expression x(t) = 5t62 = 3t - 1. What is the position of the object when its velocity is 11 m/s?

### phyics-universal gravity

Calculate the force of gravity on a spacecraft 6400 km (1 earth radii) above the Earth's surface if its mass is 1600 kg.

### phyics

a 2kg mallet is dropped from a height of .6m onto a nail, driving it 3.5 cm into the wood. What is the average force exerted by the mallet on the nail? thanks

### phyics

during a process, 21.6 MJ of heat is added to closed system. if the internal energy is increased by 59.6 MJ, how much work in Btu was done? is the work done on ro by the system?

### Phyics

Given: G = 6.67259 × 10−11 Nm2/kg2 The acceleration of gravity on the surface of a planet of radius R = 3430 km is 4.43 m/s2.What is the period T of a satellite in circular orbit h = 7683.2 km above the surface? Answer in units of s

### phyics

Suppose a runner completes one lap around a 400-m track in a time of 50 s. Calculate the average velocity of the runner. Express your answer in meters per second to the nearest integer.

### Phyics please help ms sue

A 9 v battery is connected across a series combination of 100 W, 35 W, and 55 W resistors. The current measured in the circuit is 100 mA. What can be wrong in this circuit?

### Phyics

A sprinter explodes out of the starting block with an acceleration of + 2.43 m/s2, which she sustains for 1.10 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity at (a)t = 1.10 s and (b) at the end of the race?

### phyics

A gymnast bounces upward from a trampoline at an initial height of 1.2m and reaches a maximum height of 4.8m before falling back down. What was his initial speed?

### phyics/moon

The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.5 m/s2 horizontally on the moon? A) 1.3 N B) 20 N C) 33 N D) 120 N E) 130 N

### phyics

a child playing jacks bounces a super ball on tha sdewalk. The collision is elastic. Does each object have the same kinetic energy after the collision as it did before the collision?

### ssct

(phyics) question: calculate the final temperature of the water if 400grams of water at 80degress Celsius is poured into a 100grams pot at 30dgrees Celsius .

### Phyics

A pool ball leaves a 0.75-meter high table with an initial horizontal velocity of 30 m/s. Predict the time required for the pool ball to fall to the ground.

### phyics

When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration.

### Phyics

Force of 18000N is gerenated by the engine of traine having is wages of mass 1000kg each and 2000N is lost against.Calcute accelration $ force impaned on each wages.

### Phyics

Could you please check my work, I am not too sure what do. An airplane that flies at 100 km/h with a 10 km/h tailwind travels at 110 km/h relative to the ground. If it instead flies into a 10 km/h headwind, its groundspeed is : 110 km/h /2= 55 km/h

### phyics

A 0.20-kg object is attached to the end of an ideal horizontal spring that has a spring constant of 120 N/m. The simple harmonic motion that occurs has a maximum speed of 1.1 m/s. Determine the amplitude A of the motion.

### phyics

A system does 3.7 × 104 J of work, and 8.5 × 104 J of heat flows into the system during the process. Find the change in the internal energy of the system.

### Phyics

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?

### Phyics

Balance the following equations? a) Fe(OH)2 + 2O2 + 3H2O ¨ Fe(OH)3 (b) 5Sr + 6H2O ¨ 7Sr(OH)2 + 8H2 (c) 9Al + 10Fe3O4 ¨ 11Al2O3 + 12Fe (d) 13Pb(NO3)2 ¨ 14PbO + 15NO2 + 16O2 (e) 17O2 + 18N2H4 ¨ 19H2O2 + 20N2 (f) 21C4H10 + 22O2 ¨ 23CO2 + 24H2O

### phyics

A ball is placed at the top of a hill of incline 60.0 degrees. The ball is allowed to roll for 12.0 seconds. How far will the ball roll during this period? Neglect friction.

### phyics

A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Express your answer to two significant figures and include the appropriate units. please help me ...

### phyics

The position of a 2.75 *10^5 N training helicopter under test is given by r = (0.020 m/s^3)(t^3)i + (2.2 m/s)(t)j - (0.060 m/s^2)(t^2) k Find the net force on the helicopter at t =5.0s. Express your answer in terms of i,j,k. Express your coefficient using two significant figures.

### phyics

Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following fraction of the tritium present in new brandy, how long ago was it produced? 1/16

### phyics

An object on a vertical spring oscillates up and down in simple harmonic motion with an angular frequency of 25.1 rad/s. Calculate the distance d by which the spring stretches from its unstrained length when the object is allowed to hang stationary from it.

### phyics

A 11.7-kg uniform board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 230 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained length.

### phyics

An object on a vertical spring oscillates up and down in simple harmonic motion with an angular frequency of 25.1 rad/s. Calculate the distance d by which the spring stretches from its unstrained length when the object is allowed to hang stationary from it.

### phyics

Four cars undergo acceleration as described by the data in the following table. Car Initial Velocity (m/s) Final Velocity (m/s) Time period (s) A 2.0 11.0 3.0 B -5.0 3.0 2.0 C 1.0 -5.0 2.0 D 0.0 25.0 10.0 Rank the accelerations from most positive to most negative.

### phyics

A box of mass 0.385 kg slides down a very smooth (frictionless) ramp which is inclined at an angle of 56.6° above the horizontal. What is the acceleration of the box down the ramp?

### Phyics

A projectile is fired horizontally from a 39 m cliff at 30m/s . Find the speed and velocity of the projectile when it strikes the ground. Find vx Find vy Find v

### phyics

A projectile is launched horizontally with a speed of 80.0 m/s. If the projectiles is launched above the floor, how long does it take the projectile to hit the floor?

### phyics

A mechanic pushes a(n) 3980 kg car from rest to a speed of v, doing 5107 J of work in the process. During this time, the car moves 29.3m. Neglect friction between car and road. Find the speed v. Answer in units of m/s.

### phyics

A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Please help on this i don't know what i should put i think m/s squared but i am not sure Express ...

### phyics

Who will hear the voice of a singer first-a person in the balcony 50 m away from the stage (Fig. 22-19), or a person 2000 km away at home whose ear is next to the radio? Assume that the microphone is a few centimeters from the singer and the temperature is 20°C.

### Phyics

A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 75.5 m/s2 for 1.58 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) ...

### phyics

A hand exerciser utilizes a coiled spring. A force of 86.9 N is required to compress the spring by 0.0231 m. Determine the force needed to compress the spring by 0.0432 m.

### Phyics

A 715N person walks up three flights of stairs, covering a total vertical distance of 10.5(a)If as typical, only 20% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use

### Phyics

A 17-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 28 N. Starting from rest, the sled attains a speed of 2.3 m/s in 10 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.

### phyics

An airport has runways only 184 m long. A small plane must reach a ground speed of 40 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport? Answer in units of m/s2

### chemistry phyics HELP PLEASE STUCK

A 20.0 L tank contains helium at a pressure of 100 atm and a temperature of 30 degrees Celsius. A) what is the mass of the helium inside the tank?(HINT: the molar mas of He is 4.0 g/mol B) what would the mass of nitrogen (N2) be under the same conditions?

### Phyics

A hot-air balloon is rising upward with a constant speed of 4.00 m/s. When the balloon is 4.77 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

### Phyics

A hot-air balloon is rising upward with a constant speed of 4.00 m/s. When the balloon is 4.77 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

### Phyics

A 56 kg astronaut stands on a bathroom scale inside a rotating circular space station. The radius is 250 m and the bathroom scale reads 42 kg At what speed does the space station does the floor rotate

### phyics

A person who weighs 829 N steps onto a spring scale in the bathroom, and the spring compresses by 0.538 cm. (a) What is the spring constant? (b) What is the weight of another person who compresses the spring by 0.390 cm?

### phyics

When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 5.0 x10-7 m and a maximum speed of 3.3 x10-3 m/s. (a) What is the frequency (in Hz) of the eardrum's vibrations? (b) What is the maximum ...

### Math and Phyics

Mass points M and m are kept at the vertices of an equilateral triangle whose sides are of length a. 1. Find the distance between the center of mass of the system and mas point m. 2.Determine the moment of Inertia of the system about the center of mass

### phyics

When Babe Ruth hit a homer over the 10 m -high right-field fence 80 m from home plate, roughly what was the minimum speed of the ball when it left the bat? Assume the ball was hit 1.2 m above the ground and its path initially made a 39 ∘ angle with the ground.

### phyics

Richard is driving home to visit his parents. 125 of the trip are on the interstate highway where the speed limit is 65 . Normally Richard drives at the speed limit, but today he is running late and decides to take his chances by driving at 72 . how do i get to my answer

### phyics

Cheryl is riding on the edge of a merry-go-round, 2m from the center, which is rotating with an increasing angular speed. Cheryl’s tangential acceleration is 3.0m/s2. At the instant that Cheryl’s linear speed is 4.0m/s, what is Cheryl’s total acceleration? Express your ...

### Phyics

A ship is first seen on a radar screen to be 13 km east of the radar site. Some time later, the ship is at 16 km northwest. What is the displacement of the ship from the first location it is seen at?

### Phyics - Astronomy

You are standing at a latitude of 35 degrees South. Star x is currently at an azimuth of 45 degrees and an altitude of 50 degrees. What is the azimuth and altitude coordinates of Star X 3 hours later? I don't know how to do this. If anyone knows how to calculate this please ...

### phyics

A simple pendulum is made from a 0.781-m-long string and a small ball attached to its free end. The ball is pulled to one side through a small angle and then released from rest. After the ball is released, how much time elapses before it attains its greatest speed?

### Phyics

A cylinder which is in a horizontal position contains an unknown noble gas at 4.63 × 104 Pa and is sealed with a massless piston. The piston is slowly, isobarically moved inward 0.202 m, while 1.95 × 104 J of heat is removed from the gas. If the piston has a radius of 0.283 ...

### Phyics

The average distance between Earth and the sun is 1.50e8 km. Calculate the average speed, in km/h, of Earth assuming a circular path about the sun. Use the equations v = 2r/T. Please ignore this question and view the question I have a few spaces above. The equation was not ...

### Phyics

The leader of a bicycle race is traveling with a constant velocity of +11.9 m/s and is 10.7 m ahead of the second-place cyclist. The second-place cyclist has a velocity of +9.30 m/s and an acceleration of +1.20 m/s2. How much time elapses before he catches the leader?

### phyics

on a warm day(92 degrees F) an air filled balloon occupies a volume of .20m^3 and is under a pressure of 20.0 lbs/in^2. if the baloon is cooled to 32 degrees F in a refigerator while its pressure is reduced to 14.7 lb/in wat is the volume on the air in the container? (assume ...

### Phyics

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.48 m/s. The car is a distance d away. The bear is 30.5 m behind the tourist and running at 6.67 m/s. The tourist reaches the car safely. What is the maximum possible value for d?

### phyics

Ethyl alcohol has been added to 190 {\rm mL} of water in a container that has a mass of 140 {\rm g} when empty. The resulting container and liquid mixture has a mass of 450 {\rm g}. What volume of alcohol was added to the water? Express your answer using two significant figures.

### phyics

A novice golfer on the green takes three strokes to sink the ball. The successive dis- placements are 5.9 m to the north, 10 m 45 north of east, and 5.9 m 26 west of south. Starting at the same initial point, an expert (lucky) golfer could make the hole in a single ...

### phyics help nedded

In the figure below, three ballot boxes are connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The masses are mA = 24.0 kg, mB = 40.0 kg, mC = 30.0 kg. (a) When the assembly is released from rest, what is the ...### Pages

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