# Math/Physics

211,502 results, page 47

### 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

The density of a gas is 1.25 kg m – 3 at N.T.P. Find the Root mean square velocity of its molecules.

### 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?

### Physics

What force is required to stop a 1500-kg car in a distance of 0.20 m if it is initially moving at 2.2 m/s?

### Physics

is the average random kinetic energy of the molecules decreasing ? ( In cooling curve)

### physics

calculate the kinetic energy of a body of mass 2kg moving with a velocity of 0.1m/s.

### Physics

A and B are vectors in the same plane. If A= 8i+6j. Find the vector B such that |A+B| = 14.14 units and A is perpendicular to B.

### Physics

Find out the resultant of two forces of 4N and 7N acting at an angle of 140°

### physics

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

### physics

Calculate the angular velocity of a swinging pendulum whose length is 125cm

### Physics

the mass of an airplane is 1.81x10^5 kg. if the gravitational potential energy is 3.78 x 10^7 J, how high did it fly?

### Physics

From the standpoint of energy and power, what are the advantages for a car with high horsepower? What are the disadvantages?

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 ...

### Math (Combinatorics)

40 students attended the brilliant summer camp at Stanford University. "k" of the students at the camp are working on math problems and the others are working on non-math problems. One of the camp mentors noticed that whenever all the students were partitioned into 2 or more ...

### 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...

### statistics

The box plot below summarize the distributions of SAT verbal and math scores among students at an upstate New York high school. 300 400 500 600 700 800 data Whic of the following statements is false? 1. The range of the math scores equals the range of the verbal scores. 2. The...

### 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 ...

### MATH

I get really confused with math . I am great with all of the other subjects . In fact I get all B's except for Math , I get 1's !!! I really need help with it . I ask for help but whenever people help me and put it in the most simplest way possible .. I still don't get it . I ...

### math/What is a interval in math terms?

doe sanyone know what a interval is in math terms? i need the real definition and it is hard and i can not find it anywhere? can anyone help me? thanks,you rule Kayla an interval is "a mathmatical expression of 'betweeness' a---------b or a<x<b this can also be written ...

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 ...

### Math

I need help with my math homework.I searched for homework help forums and I found the Jiskha Website on the Google Website so this is my first time.I am new. Math Homework: What is the value of number 3 in 2,539? What is the value of number 9 in 4,879 What is the of number 6 ...

### Math

John has scores of 88,73,90,85,93 on five math quizzes. What scores must john earn on the next math quiz to have a mean quiz score of exactly 88?

### math

Decide which variables described is likely to have a normal or near normal distribution a. the number of courses remaining until graduation for the students in a small liveral arts college b. the SAT math scores for students in an advanced placement math class i think the ...

### 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 ...

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 ...

### algebra 2

Lincoln High School has 98 teachers. Of the 42 female teachers, 8 teach math. One seventh of all of the teachers teach math. What is the probability that a teacher is a man or does not teach math?

### math

i m always having a problem in math. i can't do fraction easilly. im going to have an final exams , starting on 2 april . i hope if any one can help me. You need to tell us, in detail, what you don't understand about fractions. o!isnt the test the...SAT?? yes,,im good at math ...

### 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...

### 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

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...

### 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

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 ...

### 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?

### Physics

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?

### Physics

How do the mainsail and the jib of a sailboat help the boat sail? What do these two sails have to do with force?

### Physics

Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?

### Physics

Why are the armature and field windings of an electric motor usually wound on an iron core?