# Physics!

73,661 results, page 47

### Physics

How long does it take light traveling from the sun at 3.0 x 10^8 m/s to reach Jupiter, which is 780 x 10^6 km away?

### physics

what force is necessary to stop a 20 g bullet moving at 200 m/s as it penetrates a wood at a distance of 4 m?

### Physics

A nurse counts 76 heartbeats in one minute. What are the period and frequency of the heart's oscillations?

### Physics

Find the maximum height reached by a ball thrown upward at a velocity of 95ft/s

### Physics

How long does it take a motor cyclist to come to rest?which travels at 12m/s decelerates at 3m/s^2

### physics

This isn't so much a question, but a query: What does this mean? K.E. = 1/2 mv2 I can do the homework on my own if someone lets me know. Thanks.

### physics

what is the greatest acceleration can be generated by a runner if coefficient of friction between shoes and road is 0.95

### physics

Calculate the watts of power expended when a force of 1.8 N moves a book 2.0 m in a time interval of 1.0 M/S

### PHYSICS

a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help

### Physics

Under what conditions would an applied force increase the Kinetic energy of an object?

### physics

explain why a child on a swing comes to rest directly below the top of the swinng

### Physics

If a shoe is dropped from a height of 40m, what is its speed after falling for two seconds?

### Physics

Calculate the gravitational force between two identical 100-kg masses separated by 1 m.

### physics

how much force can be applied to the top block without the blocks slipping apart

### physics

how much force can be applied to the top block without the blocks slipping apart

### physics

I am moving 3 blocks with a force of 3 newtons over a distance of 1 meter in 10 seconds. What is the power?

### Physics

Using volume of a sphere, calculate the average density of Saturn (radius = 60,268 km).

### physics

How far does a point on the circumference travel if the wheel is rotated through an angle of 26.2 rev?

### Physics

Why do we see more mirages in southern states and in the summer than at other times or places

### physics

What is the period and frequency of a 10-pound weight oscillating (as a pendulum) on a 5-meter-long rope?

### Physics

Roads seldom go straight up a mountain, they wind back and forth. Explain why this is useful

### Physics

What is the instantaneous speed 3 seconds into the journey of a car traveling at a constant velocity of 10 m/ s?

### Physics

Find the velocity of microwaves having wavelength of 0.75m and frequency 2.75X10^10hz

### physics

Your friend of mass 80 kg can just barely float in freshwater.Calculate her approximate volume.

### Physics

A Brass rod 50.0 cm long expands 0.0734 cm when heated. Find the temperature change.

### physics

What is the density of nitrogen gas (molecular mass = 28 u) at a pressure of 1.2 atmospheres and a temperature of 284 K?

### Physics

Why is it that interference effects don't show up regularly in glass window panes with two surfaces?

### physics ! HELP PLEASE !!!!1

what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?

### physics

What is the minimum work in joules needed to push a 1540 kg car 44.0 m up a 12.5 degree incline?

### physics

a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight?

### physics - help !!!!!!!!

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above. Thank you

### physics

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above.

### physics

Calculate the internal energy of 25.0 g of low-density oxygen gas (O2) at a temperature of 255 K.

### physics

define black body, emissivity, solar constant in relation to heat transfer.

### Physics

If a car delivers 76.2 hp of power, how much time will it take for the engine to do 5.78e5 J of work?

### physics

Which of the following is forward biased? (i canna draw so plz manage wid dis) (0V)-------pn-------(-2V) (-4V)-------pn-------(-3V) (-2V)-------pn-------(2V) (3V)-------pn-------(5V)

### physics

a gun shoots a potato from a height of 6 feet. how long does it take to hit the ground.

### Physics 30

If a truck moving at 30km/hr accelerates at 2.5m/s^2 to 50 km/hr, what time (in sec) does it take? a. 2.22s b. 5.56s c. 8 s d. 28.8s

### physics

how much torque do you exert if you push perpendicularly on a door with a force of 30 N at a distance of 0.85 m from its hinges

### physics

what force must the woman in Figure 3.38 exert on the floor with her hands in order to do a pushup?

### Physics HELP!!

What is the de Broglie wavelength of an electron that strikes the back of the face of a TV screen at 1/10 the speed of light?

### Physics

A 70 g ball moves 45m/s. If its speed is measured to an accuracy of 0.10% what is the minimum uncertainty in its position?

### PHYSICS

A car speeds up at 5m/s if the driver was already moving at 7m/s find his velocity after 3 seconds

### Physics

By what distance must two charges of +2 C and +4 C be separated so that the repulsive force between them is 4.10 1010 N?

### Physics

An ideal gas performs 453 of work and loses 45J of internal energy

### Physics

The parabolic TV antenna receives electromagnetic waves from satellites. What is special about these rays?

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what is the net electrostatic force on the charge q3 -48ìc due to charges q1 (+78µC) and q2 (+50µC)

### physics

How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C

### integrated chemistry and physics

If 2 blocks have the same mass which one has the greater acceleration?

### Physics

find the altitude change of a 10,000 kg fighter which climbs and in doing so loses 100 m/s of airspeed

### Physics

find the altitude change of a 10,000 kg fighter which climbs and in doing so loses 100 m/s of airspeed

### PHYSICS

A BODY CHANGES IT'S VELOCITY FROM 20M/S UNTIL IT COMES TO REST IN 10 SECONDS.WHAT IS IT'S ACCELERATION

### Physics

An object is thrown upward with a speed of 21.5 m/s. How high above the projection point is it after 2.06 s?

### physics

What is the velocity of an object that falls from a cliff tot he ground which is 20,000 centimeters below?

### physics

a 60kg sprinter accelerates from rest at 2.5m/s east for 4s. what force is acting and what is his final speed?

### physics

a 333 hz and 337 hz tuning forks are struck simultaneously. whats will be the beat frequency?

### physics

Calculate the speed of sound wave in air if its frequencies and wavelengths are 256Hz and 1.32m

### physics

Consider the equation -mv0 +3mv0 = 4mvf. Where m and v0 are constants, Solve for vf. Simplify answer.

### Physics

What will a spring scale read for the weight of a 75 kg woman in an elevator that moves upward with acceleration 0.30 g? w=?

### physics

a car starts from rest and accelerates uniformly at 2m/s for 10second. what is its velocity at the end of 10 second?

### Physics.

when an e- and a positron collide they're annihlated and their mass converts to engery. the energy released is? [1.64x10^-13 J]

### Physics

Suppose the circular track in the figure below has a radius of 104 m and the runner has a speed of 3.3 m/s.

### Physics

Suppose the circular track in the figure below has a radius of 104 m and the runner has a speed of 3.3 m/s.

### physics

Doubling the frequency of a wave source doubles the speed of the waves. ( True or False)

### physics

a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?

### Physics

If you must stop your moving car in a hurry, should you slam on the brakes and lock them?

### physics

If an engine produces a (mass flow rate) of 100kg/s of thrust, what is the force in Newtons?

### Physics

How does the speed frequency distribution graph change for a given gas as the temperature is increased?

### PHYSICS

2. How does the speed frequency distribution graph change for a given gas as the temperature is increased

### physics

An 80 kg man on a 10 kg stretcher is being pulled upward with constant speed. What is the tension on the rope ?

### physics 102

What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm

### physics

i want a simple laboratory method of determining a young modulus of a long thine wire

### Physics

A car travels in a straight line for 3.9 h at a constant speed of 83 km/h . What is its acceleration? Answer in units of m/s2

### physics

Which has the greater acceleration, a car that increases its speed from 50 to 62 km/h, or a bike that goes from 0 to 12 km/h in the same time?

### physics

At a certain instant a moving object comes to momentary rest. Is it accelerating at that moment?

### physics

A bug completes one lap along the edge of a circular planter of radius 14.4 cm in 12.94 s.

### Physics

A rollercoaster travels 135ft at an angle of 58.7 above the horizontal. How far does it move horizontally?

### Physics

A car travels in a straight line for 4.8 h at a constant speed of 63 km/h . What is its acceleration? Answer in units of m/s 2

### physics

A ball is dropped from the roof of a building. How much time does it take to reach a velocity of 15.4 m/s?

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what is the acceleration due to gravity at a distance of 2 earth radii abouve earths surface?

### Physics

A ball was thrown straight up at 26.2 m/s then caught at the same place it was released. How many seconds was it in the air?

### physics

A ball was thrown straight up at 20.7 m/s then caught at the same place it was released. How many seconds was it in the air?

### physics

If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it

### physics

A 6.0 Kg object undergoes an acceleration of 2.o m/s squared. what is the magnitude of the net external force acting on it?

### Physics

What is the speed of a hockey puck of mass 0.15 kg if it experiences a force 60 in N for the extent of a slap shot of 0.25 m?

### physics

If a ferris wheel has the radius of 5 meters, and one revolution takes 32 seconds, what is its speed?

### Physics

Identify the causes of conductive and sensorineural hearing loss. I have no idea. Please help.

### physics

why one cannot find the north pole of the earth using only a simple compass

### physics

what device could use th earth's magnetic felds to produce energy and how it would work?

### PHYSICS ASAP!

A Football is kicked 66.6 meters in 5.39 seconds. What was the initial velocity? Magnitude and Direction

### Physics

Janetjumpsoffahighdivingplatformwith ahorizontalvelocityof2.96m/sandlandsin thewater2.8slater. Howhighistheplatform ?Theacceleration ofgravityis9.8m/s2.

### Physics

you throw a ball upwards in the air at a velocity of 80m/s how fast will it be moving at 3 sec?

### Physics

Contrast the metric units of distance, time, and speed. Describe the relationship between them.

### Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

### physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

### Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

### Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

### Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

### physics

If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?