# Math/Physics

206,302 results, page 74

### Math

What is the difference between exponents and subscripts in math?

### Math

Can you help with a math word problem on rates and ratios

### Math

2/3+3/4= 8/12 + 9/12= 17/12=1 4/12=16/12=8/6=4/3=1 3/3=2 Can you please be so kind as to check my math problem. Thank you

### Math

Tell how to find 81 - 16 using mental math

### Math

insert +, -, X, /, and () to make each math statement true 4 4 4 4 = 10 4 4 4 4 = 6

### physics

light travels from ethanol intro crown glass. what's the brewster angle in this situation? illustrate your answer with a light ray diagram. what's the signifcance of this angle of incidence? n1=1.36for ethanol nR=1.52 for crown glass tanangleB=nR/ni =1.52/1.36 =1.12 (48.2 ...

### Math

How do I work this out: beth took a math test and scored a 75. She took another math test and scored 20% higher. Whatis her scorefor the second test?

### Physics

Ammeter 1 reads 0.20 A. a. What should ammeter 3 indicate? b. What should ammeter 4 indicate? Given: RA = 22-OHM RB = 13-OHM A1 = 0.20 A Ammeter 2 reads 0.15A. a. Find the voltage across the 22-ohm resistor? b. Find the voltage across the 15-ohm resistor? c. What is the ...

### Connexus Help me!!

I need help in an assignment from Connexus and its in math but I can't put the question because the question includes a diagram. The unit it's on math and its lesson 3: indentifying and classifying angles:2 Math 7B unit 1: Geometry. So if anybody that goes to Connexus help me ...

### Math

im lost evaluate 30 divided by 5*3-2 all over/2-2divided by 3 Math - jim, Tuesday, October 20, 2009 at 5:39pm You 'll have to clarify that. Do you mean: 30 / (5*3-2)/ (2-2/3) ? Math - Diana, Tuesday, October 20, 2009 at 7:40pm no Ill try to write it out thirty divided by 5 ...

### math

In a survey of 25 college students, it was found that 9 were taking an English class, 14 were taking a math class, and 8 were taking both English and math. How many students were taking a math class only

### Math

Jance spend from 7pm to 9pm doing her homework. She spend 3 times as mach time on her english project as she did on math. the science homework took twice as long as her math homework. How meny minutes did she spend on her science homework?

### Physics please clarify

A charge of -3.00 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -3.20 µC at the position due north and +5.00 µC at the position due east. What is the magnitude and ...

### physics

A firefighter at street-level, 55.0 m away from a burning building, directs a stream of water from a fire hose at an angle of 35.0° above the horizontal. If the speed of the stream is 50.0 m/s, at what height will the stream of water strike the building? I started by finding ...

### Derrick

John kept track of all his math and reading test scores throughout the year as shown in the table below. Test 1:90math 80reading Test 2:75math 90reading Test 3:80math 70reading Test 4:90math 75reading Test 5:95math 90reading What is the difference between the median of his ...

### math

in a school of 100 students, 59 are taking math, 51 are in english, 35 are in history, 24 are in both math and english, 19 are in both english and history, 13 in both math and history, and 11 in all three courses. how many students are taking: a) none of the classes? b) only ...

### Physics

Simple Harmonic Motion With the equation x=Acos(2 pi f) t why and how does f affect x This is really urgent! Thanx for any help! frequency determines how rapidly x oscillates.

### physics

If you cover your home thermostat with a blanket, will it make the house hotter or colder, or have some other effect?

### Physics

The sum of 2 vectors is the smallest when the angle between them is : a) 0 b) 45 c) 90 d) 180 d) i believe is the correct answer but i'm not sure exactly. Thanks in advance for your help.

### physics

An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?

### physics

The path of a projectile fired at a 30 degree angle to the horizontal is best described as 1.parabolic 2.linear 3.circular 4.hyperbolic

### physics

What average force is required to stop an 1100-kg car in 8.0 s if it is traveling at 95 km/h? i got the answer to be 13062.5 N. i don't think that's right...

### AP Physics<<help

A 1.7 kg bundle starts up a 30 degree inlcine with 105 J of Kinetic Eneergy, How far will it slide up in the plane if the coefficient of friction is .3 ?

### Physics

A,B,C,D are four charges placed at each corner of a square, with A= -6.00 mC , B=6.00 mC, C=-6.00 mC and D=6.00 mC.ALso AB=BC=CD=DA=0.100 m.Determine the magnitude and direction of force on each charge.

### physics

How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?

### physics

a 1200-kg automobile travels at a speed of 90-km/h (a)what is the kinetic energy? (b) what is the net work that would be required to bring it to a stop?

### Physics

How long does it take a 19 kW steam engine to do 6.8x10^7 of work? I have no idea how to solve this... Would someone please help?

### physics

what is the formula for finding the magnitude of average acceleration simplified into length, velocity, time, and delta units?

### Physics

Find the orbital velocity of a satellite orbiting 1800km above sea level in meters per second?

### Physics

A ball falling from rest is located 45 m below its starting point 3.0 s later. Assuming that its acceleration is uniform, what is its value?

### Physics

heyy, we need help finding links on the internet that provide you with simple questions based on dimensions and dimensional analysis.

### Physics

How long would it take for a beam of light to travel around the earth in an ideal fiber-optic cable?

### Physics

By how much shoould a pair of light rays from a common source differ in length to produce destructive interference?

### Physics

What is the color of all the visible light frequencies mixed together equally? I would think white. Is that right?

### Physics

If U-238 splits into two even pieces, and each piece emits an alpha particle, what elements are produced?

### Physics

According to special relativity, the momentum (mv) of an object at relativistic speed is actually: more, less or no different than if it were at rest

### physics

What constant net force is required to bring a 1500 kg car to rest from a speed of 100 km/h within a distance of 55 m?

### Physics

What is the shortes possible time in which a bacterium could travel a distance of 8.4 cm across a Petri dish at a constant speed of 3.5mm/s?

### Physics

What is the gravitational field strength at a place 220km above Earth's surface, the altitude of many piloted space flights?

### physics

What is the minimum work function for a metal for visible light (wavelengths between 400 and 700 ) to eject photoelectrons?

### physics **

When people sleep, their metabolic rate is about 2.6 10-4 C/(s·kg). How many Calories does a 69 kg person metabolize while sleeping 9.0 hours? ? Cal

### Grade 11 Physics - Light Unit

Why must rays be shone in the centre of a flat surface? Describe the difficulty that's results if this is not done.

### physics

A moto of a crane is lifting a 100 kg load 20m high using 25 kj of electrical energy. calculate the efficiency

### physics

What are four situations where photovoltaic cells would have an advantage over other sources of electric energ?

### physics

What are four situations where photovoltaic cells would have an advantage over other sources of electric energ?

### Physics

calculate the following, expressing the answer in scientific notation with the correct number of significan figures: (8.86 + 1.0 * 10^-3) / 3.610 *10^-3 2454.57?

### Physics

At what rate would a 75kg person travel during a slip/fall on a wet surface to the landing position.

### physics

Find the first two harmonics of a linear mass density .002 kg/m and length 0.60m when it is subjected to tension of 50 N.

### physics

What happens to a path of a light ray parallel to the principal axis, after it passes through a converging lens?

### physics

If a spring is compressed 2.0 cm from its equilibrium position and the ncompressed an addition 4.0 cm, how much more work is done in the second compression than in the first?

### physics

when looking at a window, you see two reflected images slightly displaced from eachother. Why/ Is it because glass is more dense.

### Physics

a proton moves in a circle in a uniform magnetic field of 1T, pointing into the page. Its speed is 1.5 x 10 ^5 m/s. What is the radius of its path?

### 10th grade Physics

What experiment(apparatus can be made) can be used to determine the relationship between period and frequency of vibration?

### Mathematics-in-Physics

If two objects were traveling at the speed of light would they explode on impact or pass through each other?

### physics

You are driving north on a highway. Then, without changing speed, you round a curve and drive east. Does your velocity change?

### Circuits/physics

For the element shown below, v(t)=1/2tVolts and i(t) = 12t-4t^2 Amps. (a) Find the instantaneous power p(t) as a function of time. + v(t) - |------| -----| |----- |------| i(t)----->

### physics

The head of a rattlesnake can accelerate 50 m/s2 in striking a victim. If a car could do as well, how long would it take to reach a speed of 78 km/h from rest?

### physics

If Vx= 8.00 units and Vy= -6.40 unis, determine (a)the magnitude and (b)direction of ->V(vector) b) theta= ______ degrees below the positive x-axis.

### Physics

If a 20 kg object fell to the surgace of the Earth from a height of 30m, what would its final velocity be? (work from the energy standpoint)

### science- physics

which has the greater momentum when they move at the same speed- an automobile or a skateboard? which requires the greatest stopping force?

### Physics

What angle should you rotate a mirror so that a reflected ray rotates through 28 degrees. I got 20, but i am not sure, please help

### physics - forces

Calculate the velocity of a satellite moving in a stable circular orbit about the Earth at a height of 2600 km.

### Physics

Now consider the same two springs in series. 6.4 N/cm, 3.6 N/cm 44 N What distance will the spring of constant 3.6 N/cm stretch? Answer in units of cm.

### college physics

A cook holds a 1.90 kg carton of milk at arm's length. What force B must be exerted by the biceps muscle?

### Physics

A freight elevator has a mass of 240 kg. Find the tension in the cables (to the nearest whole number) when it ascends with an acceleration of 4 m/s2.

### Physics

60 cm^3 of gasoline are mixed with 55 cm^3 of water. What is the average density of the mixture? answers in meters i did (.6*680)+(.55*1000) then divided by 95...is this workable?

### physics

One projectile is launched horizontally while another is dropped from rest at the same time. Which will hit the floor first?

### physics

In order to move a heavy object you must push against it with a larger force than it pushes on you. Is this true or false?

### physics

At a construction site a pipe wrench struck the ground with a speed of 24 m/s. (a) From what height was it inadvertently dropped? (b) How long was it falling?

### physics

what is the force required to start moving a 25kg box across a concrete floor with a coefficient of static friction of .65?

### physics

what is the coefficient of kinetic friction between a 2kg brick and concrete if it takes 9.0N of force to move it at a constant rate?

### physics

Yeah I know it is! But it's really confusing me and it's what my teacher wants. Say I was to pick a height of 25m and a Velocity of 20.0m/s, what would be my next step?

### physics

a tight rope walker drops a coin from a height of 3150m above the ground how high is it when it is traveling at 60m/s

### Physics

What is the net force acting on the ring in the diagram?

### Science Physics

You walk 30 m south and 30 m east. Find the magnitude and direction of the resultant displacement both graphically and algebraically

### Physics

A 2.0-kg rock falls from a height of 25 m to a point 20 m above the ground. How much potential energy does it lose? GIVEN: mg = 2.0 kg h/d = 5 m PE = mgh PE = (2)(5) PE = 10 J

### Physics

New York's 300 m high Citicorp Tower oscillates in the wind with a period of 6.80 s. Calculate its frequency of vibration.

### physics

According to Newton's version of Kepler's third law, how would the ratio T^2/r^3 change if the mass of the Sun were doubled?

### physics

A barometer is taken from the base to the top of a 554 m tower. Assuming the density of air is 1.29 kg/m3, what is the measured change in pressure?

### physics

If your initial speed was 19 , and you were heading due west, what was your average velocity during braking? Assume constant deceleration

### Physics

Describe the path of a moving body whose acceleration is constant in magnitude at all times and is perpendicular to the velocity.

### college physics

Let's say that you find a slope of 6.671×10-14 for square plates of width 11.5 cm. What do you get for the value of the permittivity of free space?

### Physics

An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?

### physics

An airplane lands and starts down the runway at a southwest velocity of 44 m/s. What constant acceleration allows it to come to a stop in 1.3 km?

### physics

For an object travelling at a constant velocity,what quantity of motion remains the same over equal time interval?

### physics

A ball is thrown upward from a platform 4.6 m high with a speed of 23 m/s at an angle of 40 o from the horizontal. What is the magnitude of its velocity when it hits the ground?

### Physics

What types of material would be a good choice to shield a sensitive electronic device from stray electric fields?

### physics

A ball is thrown off a 30 m high cliff at 2 m/s, 50 degrees above the horizontal. How long does it take to hit the ground?

### Physics

An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?

### Physics

A race car traveling at 44 m/s is accelerated to a velocity of 22 m/s over an 11 s interval. What is the displacement of this time? (Could you show how you got the answer?) Thank you

### physics

How much kinetic energy is gained by an electron that is allowed to move freely through a potential difference of 2.5 × 104 V?

### physics

dave is traveling in his car at 16m/s. he maintains this speed for 60 seconds. what is his acceleration in meters per second squared?

### physics

How long would it take for a 2.00kW pump to raise the same amount of water to the clouds's altitude 2.00km?

### Physics

Calculate the specific heat of a metallic element if 314 joules of energy are needed to raise a 50.0 g sample from 25 to 50 degress C ? :)

### Physics

Under what conditions will a 0.0300 kg marble and a 3.00 kg rock have the same gravitational potential energy other than zero

### PHYSICS

Calculate the maximum amount of stretching (in percent) that a piece of steel can undergo before breaking under tension

### physics

A 20kg mass moving at a speed of 3m/s is stopped by a constant force of 15N. Show that the stopping time required is 4s.

### 6th grade science (physics)

explain and describe Law of Universal Gravitation in relation to force, mass and distance

### Physics

3000 Joules of energy in the form of heat are added to a copper block with a mass of 1 kg. What is the blocks temperature change?