# Math/Physics

207,579 results, page 46

### physics

What is the maximum walking speed of an adult man whose legs are each 1.2 m long?

### Physics

Two vector of 5N and 6N flow they oriented to get the resultant of 7N,9N?( please solve this question)

### PHYSICS

What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?

### physics

at what attitude the value of g would become one forth than on the surface of the earth?

### Physics

a westward force of 20 N acts on a 2.0 kg object moving eastward at 60 m/s for 2.0 s. What is the resulting velocity?

### physics

The equation y=5sin(3x-4)where y is in millimeters x is in metres and t is in seconds,represents a wave motion

### physics

calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2

### Physics

What is net capacitance if maximum potential is 40 volt and instant charge is 60 coulomb.?

### physics

4N force applied on a body mass 20kg then calculate work done in 3sec?

### Physics

What is the magnitude of the momentum of a 10,000-kg truck whose speed is 12.0 m/s? What is the kinetic energy?

### Physics

An object of area 15sqcm and height 2 cm has a mass of 50g. what is its density in SI system

### Physics

Determine the magnitude of current I3. Let the voltage of the bottom battery VB =13.0 volts and r= 1.0 Ω.

### physics

a car moving through road what is the direction of force and surface of acting

### Physics,Mthe

a body of mass is100an objet and volume is 10 .find the density

### physics

A man walked 10 m north, then 5 m south. What distance did he walk? What is his final displacement?

### physics

the time of flight of an object projected with speed 20m/s at an angle 30¡ã with the horizontal is

### Physics/Science

How much heat must be removed from 15.0g of water at 10°C to become ice at 0°C?

### PHYSICS/SCIENCE

How much heat must be removed from 5.0g of water at 10°C to become ice at 0°C ?

### PHYSICS

A BALL MOVES ROUND A CIRCLE WITH RADIUS OF 20CM CALCULATE THE DISTANCE

### Physics

Throw a stone straight up in the air. At its highest height what is its speed? Is it accelerating then?

### physics

What is the resultant displacement when a ship sail 200km north and then 150km west

### PHYSICS

What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/h to 72 km/h uniformly?

### physics

How much heat is needed to raise the temperature of 2kg of water to 10K?

### Physics

A glacier advances at 7 × 10−6 cm/s. How far will it move in 3.7 y? Answer in units of cm. Plz help! I don't get it.

### physics

the speed of a certain wave is 3.00cm/s. if its frequency is 0.20hz, what are its wavelength and period

how do i figure out how fast a car is going when all i know is frequency?

### physics

An airplane travels 250 km/h due West for 2 hours. Its average velocity is:

### Physics

How much power is required to move a 1500 kg elevator at a constant velocity of 2.5m/s.

### physics

If a hair dryer is rated at 900 W, how much energy does it require in 5 minutes?

### Physics

Determine the radius R of an object undergoing circular motion at a velocity of 54 m/s with an acceleration of 90 m/s^2

### Physics

If a racehorse starts from rest and accelerates at a rate of 4.7 m/s2, how long does it take the horse to go 20 m?

### physics

. Two positive point charge of 12 μC and 8 μC are 10 cm apart. The work done in bringing them 4 cm closer is,

### Physics

A ball thrown downward with an initial velocity of 20m/s.what will be itsvelocity after 5s

### physics

What’s the direction of the electric field caused at the point (–2, 3) by an electron located at the origin?

### physics

What’s the direction of the electric field caused at the point (–2, 3) by an electron located at the origin?

### physics

When the experimental set up is immerse in water of refractive index n=1.5.what will be the charge in beta?

### physics

the speed of the train increased from 15 mi/hr to 25 mi/hr in distance of 500 ft. calculate the average acceleration in ft/s^2

### physics

How much work is done in lifting a 300 Newton rock 10 meters from the ground?

### Physics

A mango is dropped and falls freely from rest what are its position and velocity after 1.0s,2.0s, and 3.0s

### Physics

A cheeta can run with a speed of 29 m/s. Determine the distance travelled by a running cheetah in 8.6 s. D= 29/8.6 = 3.3s

### Physics

What is the net force required to accelarate a 2000kg car to 6m/sec us equation F=ma

### physics

150g of ice at 0'c is mixed with 300g of water at 50'c. calculate the temperature of a mixture

### physics

What is the initial angle 0f projection of a projectile for which the range and the maximum height are equal?

### Physics

What is power output of a 60 kg person who walks up a 4 meter flight of stairs in 4.0 seconds?

### physics

A space vehicle accelerates uniformly from 80 m/s at t = 0 to 165 m/s at t = 10.0 s .How far did it move between t = 2.0 s and t = 6.0 s ?

### Physics

A body is dropped from rest from a height of 8m. How long does it take to reach the ground?

### physics

Uranium 235 has 92 protons in its atoms. Calculate the number of neutrons in this atom

### physics

The motion of the truck is described by the equation V = 50t – 5t^2.Find: a.Value from t = 1.5 s to t = 5.0 s. b.Vinst at t = 3.0 s.

### Physics

Make a position vs time graph of the following scenario: an object moves at 5.0 m/s for 4.0 s then at -2.0 m/s for 3.0 s.

### Physics

What happens to the focal length of a converging lens as the radius of curvature is increased?

### physics

A car has a velocity of 25m and accelerates uniformly to 45m/s in 10seconds.what is the acceleration?

### Physics

For a pendulum that completes fifteen complete swings in 34.8 seconds, how much is the frequency?

### Physics

What is the mass of water that has its temperature raised from 27°C to 32°C when it is heated by 5.0 x 106 J of heat energy?

### Physics

Calculate the force acting on a body of mass 10 kg moving with a uniform velocity of 2m/s.

### Physics

Finding of radius of capillary tube without knowing surface tension

### Physics

Would electrons be ejected from aluminum if the incident violet light has a wavelength of 4.00 x 10-7 m?

### physics

the air pressure in the tyres of a car increases during driving.Explain.

### Physics

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

### physics

Consider a drop of mass 1g falling from a height 1km.what is work done by gravity?

### physics

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

### Physics

When a cubic meter of steam at 100°C condenses, how much energy is released?

### Physics

What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 1.00 nC and a = 7.50? (The positive direction is to the right.)

### Physics

A car of 900kg accelerates uniformly from rest to a speed of 30 m/s in 15 seconds.what is its power?

### Physics

When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.6 m/s in 0.11 s . Distance?

### Physics

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

### Physics

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

### Physics!

A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?

1) A roller coaster (398 kg) moves from A (3.82 m above the ground) to B (29.4 m above the ground). Two non-conservative forces are present: friction does -1.82 x 104 J of work on the car, and a chain mechanism does +5.49 x 10^4 J of work to help the car up a long climb. What ...

### Physics check

A speeder traveling at 41 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 3.3 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder? Im sorry I am new to physics this is my first year and...

### physics

gravational force deimos, a satellite of amrs, has an average radius of 6.3 km. If the gravational force between deimos and a 3.0 kg rock at its surface is 2.5x10(-2)N..what is the mass of deimos ? Use the Universal Law of gravitation: Force= G Mm/distance^2 Solve for M. i did...

In a physics laboratory experiment, a coil with 170 turns enclosing an area of 10cm^2 is rotated from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to the field. The rotation takes 5.0×10^2 s . The earth's ...

Distruive interference? Unless you put C in the line between A and B, this the asnwer is at infinity. Now on the line between A and B, the distance from A to C has to be an odd multiple of halfwavelength greater than C to B. Now, the distance between the speakers is two ...

### PHYSICS

Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and dropped in the same ...

### Math/Physics

An electron's position is given by r = 4.00t i - 6.00t^2 j + 5.00 k, with t in seconds and r in meters. In unit-vector notation, what is the electron's velocity? (Answer in terms of i, j, k, t.)What is v in unit-vector notation at t = 8 seconds? What is the magnitude of v at t...

A person is riding a bicycle, and its wheels have an angular velocity of 26.0 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 17.6 revolutions. (a) How much time does it take for the bike ...

### PHYSICS

Could u help with physics hw! i keep trying but i keep getting the wrong answer? a 71g autographed baseball slides off of a 1.3 m high table and strikes the floor a horizontal distance of .83m away from the table. 1.how fast was it rolling on the table before it fell off? ok ...

### physics

Give two examples of ways that physicists model the physical world. I was wondering if this would be an effective answer for "give two examples of ways that physicists model the physical world." 1. Physicists build computer simulations. 2. They build small-scale replicas. I ...

### physics

Hi, I am confused about physics, more specifically force. I know that the formula for force is: f=ma So what if an object traveling at constant speed (acc equals zero) collides with a wall? How would you calculate the force, since there is no acceleration? There IS force upon ...

### Physics (maybe it's just math)

A sphere of copper is subjected to 89.7 MPa of pressure. The bulk modulus is 130 GPa. a) By what fraction does the volume of the sphere change? b) By what fraction does the radius of the sphere change? for a) I have dV/V = 0.00069 - this is correct. for b) the area I have 4/3 ...

### Math - Precalculus - Parametric Equations/Geometry

A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive real axis. (a) At time t=0, the center of ...

### Physics

An airliner is at point A and is trying to fly to point B, which is 1000 km due North of point A. The pilot of the airliner wishes to reach point B in 2.5 hr. A wind is blowing from the Northwest (45 degrees) at 100 km/hr. In what direction and at what speed must the pilot fly...

### math(help)

please help me and answers these i feel clueless!with this math 2.If Nell works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday, how much time will she work altogether? A.9/14 hour B.9/20 hour C.1 7/20 hour D.1 7/10 --------------------------- 3.eric eats 1/6 of an ...

### math

Show that if x is a nonzero column vector in R^n, then the nxn matrix: A = I - 2/||x||^2 * xx^T is orthogonal. Notation key: ||x|| = norm of x x^T = transpose of x I = identity matrix. Let me try to convince a math student to use "physics" notations that many mathematicians ...

### physics

Answer the following question:Be sure to show all work. Include formulae and units.Be sure to include relavant, meaningful diagram and a complete circuit diagram with circuit related problem. take enough space, don't try to squeeze everything on a small space!(problems are ...

### Math

Math Question = an aquarium holds 6 and 1/4 gallons of water. the water level dropped to 4/5 of this amount .how much water should be added to fill the aquarium Above is my son's math question and we can't figure out how to solve it. The possible answers are: 74 and 1/2 / 10 ...

### AP Physics

Using what's only in chapter one The Nature of Science Models, Theories, and Laws Measurement and Uncertainty; Significant Figuers Units, Standards, and SI System Converting Units Order of Magnitude: Rapid Estimating Dimensions and Dimensional Analysis How am I suppose to ...

### active physics

a 25 mewton force pushes against a 5 kg. mass. what is the acceleration??? what formula do i use?? F=ma

### Physics II

How much work (in joules) is done in moving a charge of 2.5μC a distance of 35 cm along an equipotential at 12~V?

### physics

If a car travels westward with a constant velocity of 20 m/s, what is the net external force acting on it?

### Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?

### Physics

2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?

HOW WOULD YOU integrate this equation between zero and pi/2 1/(1+(tan^2008)xdx

### Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?

### Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?

### Physics

What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 Hz?

### Physics

i cant get this right. what is the measured resistance of a 1000ohm, 500ohm and a 100 ohm resistor. and there % error

### Physics

A 4610 kg helicopter accelerated upwards at 2 m/s^2. What lift force is exerted by the air on the propellers?

### Physics

Displacement is to distance as velocity is to: a. acceleration b. mass. c. speed. d. time I chose C....is this correct?

### Science-- Physics

Does an object need to have a velocity of 0 meters per second to be in equilibrium and why/why not?