Physics!

73,661 results, page 91

physics

It takes 5.50 J of work to stretch a spring 5.90 cm from its unstressed length. What is the spring constant k in N/m?

physics

It takes 9.10 J of work to stretch a spring 5.10 cm from its unstressed length. What is the spring constant k in N/m?

physics

The speed of sound in air at 20 degrees C is 343m/s. This corresponds to a speed of ____mi/hr.

physics

What happens to the size of a hole in a metal plate when the plate is heated / cooled

physics

What happens to the size of a hole in a metal plate when the plate is heated / cooled

PHYSICS PLEASE HELP !!!!!

If a mass lies on an incline, what is the reaction force to the weight of the mass?

Physics

A boy has a mass of 45 kg and is running with a velocity of 8 m/s. Find the boy's kinetic energy.

physics

Brad tosses a rock straight up at 38.4 m/s. What is the rock's velocity after 2.0 seconds?

physics

An object is located 87.6 cm from a concave mirror that has a focal length of 17.0 cm. Where is the image located?

Physics

the coefficient of friction between a 78 kg box and a warehouse floor is .21. what is the friction force?

Physics

What is the fundamental frequency for a 62 cm banjo string if the speed of waves on the string is 470 m/s?

physics

a force of 20 n is applied to a 10 kg mass on a level frictionless surface what is the acceleration of the mass?

Physics

Suppose A=3i-2j+k, B=-i-4j+3k&C is a vector lying along x-axis with the property that A.(B+C)=0. Then find vector C.

Physics

A rocket expels gases at a rate of 1.30 x 10^3 kg/s with a speed of 3.00 x 10^4 m/s. What is the force exerted on the rocket?

physics

A constant friction force of 15 N acts on a 70 kg skier for 20 s. What is the skier's change in velocity?

physics

Which of these two is faster-a plane traveling at 250km/hr and a cat running at 250km/hr

physics

a comet experiences a uniforn acceleration from 60m/s to 183m/s what is the rate of acceleration?

physics

Mr.FIsher can kick a 2 kg football upwards at 20m/s, how high does the football travel?

physics

A capacitor that is connected to a 70.0 V source contains 105.0 µC of charge. What is the capacitor's capacitance?

Physics

How much energy is need to raise 50 kg of warm water from 45 celcius to 80 celcius?

Physics

Charges of -10.8 nC and -24.2 nC are separated by 0.813 m. What is the potential midway between the two charges?

Physics

A parallel plate capacitor has a capacitance of 1.71 nF. There is a charge of 0.809 μC on each plate.

Physics

What is the acceleration of an 0.4m aluminum cube with a density of 2.72 in a beaker of methanol, which has a density of .791?

physics

e relative to the ground. The airplane’s speed relative to the air is 77.9 km/h. Answer in units of km/h

physics

The car has a mass of 1200kg Calculate the kinetic of the car when it travels at a speed of 12 m/s.

Physics

A 0.168kg hockey puck slides at 11.4m/s. what is the work needed to stop the puck?

Physics - grade 11

The speed of light of a plastic is 1.4x10^8. What is the index of refraction in the plastic?

physics

You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

physics

You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

PHYSICS HELP!!!!!!!

You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

physics

Suppose the water waves have a velocity of 1.2m/s and wavelength of 2.4m What is the frequency of the waves?

physics

An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.7 x 10^-6 T. What is the intensity S of the wave?

physics

If you shout across a canyon and hear the echo 0.42 s later, how wide is the canyon?

Physics

If the two input voltages to a 2-input summing amplifier are +2 V and +5 V, what is the output voltage?

Physics

If the critical frequency of a low-pass filter is 5 kHz, what is the filter bandwidth?

Physics

If you can see the face of a friend who is underwater, can she also see you? Please explain. Thanks :)

physics

If the critical angle of a liquid is 41.4 degrees find the index of refraction for that liquid

physics

if a person is pushing a cart with a force of 40 Newtons and it accelerates at 0.5 m/s2 , what is the mass of the cart ?

physics

When an electron jumps from the 4th orbit to the 2nd orbit which series line does it get?

Physics

A car is initially traveling at 20 m/s when it accelerates to 35 m/s in a time of 5 seconds. What is the acceleration of the car in m/s^2?

Physics

What is the fundamental frequency for a 58 cm banjo string if the speed of waves on the string is 450 m/s?

Physics

A spring vibrates at 8Hz,when a mass of 0.82kg is hung from it.What is the spring constant?

physics

What is the fundamental frequency for a 60 cm banjo string if the speed of waves on the string is 480 m/s?

Physics

At a certain distance from the center of the Earth, a 4.00-kg object has a weight of 1.95 N. Calculate this distance.

physics 1

a car is being pulled out of the mud by two two ropes

PHYSICS

SILICON DENSITY 1.05G/CM3 1MTR x 1MTR x4MM HEIGHT

physics

How much work can a 22 kW car engine do in 60 seconds if It is 30% efficient It is 100% efficient

physics

An 21.0 , 12.0 , and 5.0 resistor are connected in series with an emf source. The current in the 12.0 resistor is measured to be 4.00 A.

physics

A plane traveling at 260m/s has a speed of Match 0.80. What is the speed of sound in the air

physics

Give an example of an object that moves in a direction opposite the direction of its acceleration

Physics

Give an example of an object that moves with constant acceleration and constant speed.

physics

A lead ball has a volume of 94.3 cm3 at 19.3°C. What is the change in volume when its temperature changes to 34.3°C?

Physics

A lead ball has a volume of 94.3 cm3 at 19.3°C. What is the change in volume when its temperature changes to 34.3°C?

Physics Diploma Q?

a photon drops from -22 eV to a ground state of -89.2 eV. the frequency the photon emits is? [1.62]

Physics

which do you prefer to use, an instrument which is more precise or one which is more accurate? WHY? thanks po! :)

physics

Find the tension T2 of the box hanging from the rope if 1 = 25°, 2 = 65°, T1 = 60.58 newtons, and W = 143.4 newtons

Physics

vertically up at 28m/sec, gravity 9.8 meters/sec^2 = what is max. height

Physics

Add (9.3x10^3) + (9.3x10^4) + (0.011x10^6) using correct significant figures?

Physics

An arrow is shot horizontally from a cliff at 15 m/s land 30 m away. How high is the cliff?

Physics

An arrow is shot horizontally from a cliff at 15 m/s land 30 m away. How high is the cliff?

physics

If an 8N force is applied to a wall for 2 minutes and the wall does not move, how much work is done?

physics

list the contact and non contact forces in mathematics. What is the cold welding?

physics

from equation t equal to root x+3 find velocity and acceleration t equal to 1second

physics

from equation t equal to root x+3 find velocity and acceleration t equal to 1second

physics

Why should we add a the value 273 to change a celcius value in to kelvin.?

physics

A ball is dropped from a height of 18.6 m. What is the velocity of the ball the instant it hits the ground?

physics

How do I find the acceleration on a velocity time graph when the graph has an irregular shape.

physics

A football is kicked 66.6 meters. If the ball is in the air 5.39 s, with what initial velocity was it kicked?

Physics

How many calories will take to convert 5 grams of 90C degree water to 0 C degree?

physics

If Joe weighs 100N on the moon how much will Joe weigh on earth? N & kg

physics

What is the magnitude of displacement for a person that walks 6.0-km North-East, 4.0-km East, and 6.0-km South?

physics

What is the magnitude of displacement for a person that walks 6.0-km North-East, 4.0-km East, and 6.0-km South?

physics

A soccer ball kicked with a force of 14.8 N accelerates at 6 m/s2 to the right. What is the mass of the ball?

physics

an object accelerates at 0.8m/s2 when a resultant force of 200n is acting on it what is the mass of the object

physics

what is acceleration of an object over a 4second period if its starting velocity is 8 m/s and it velocity is 20 m/s?

Physics

a spring with a spring constant k= 1340 N/m is oriented find the rate of compression

physics

The pendulum on a cuckoo clock is 5.00 cm long. (a) Determine the period of this pendulum. (b) What is its frequency?

Physics

What is the equivalent resistance of two resistors of 2 ohm and 3 ohm connected in parallel?

physics

find the magnitude of vector by scalar and vector A= ? + 4j +4k B= ? + 2j + 3k if the angle between them 15 degrees.

physics

The index of refraction of a certain type of glass is 1.58 what is the speed of light in the glass ?

physics

It takes 2.5 J of energy to stretch a helical spring by 15 cm. Determine the spring constant.

physics

Haloke does 179 J of work lifting himself 0.296 m. What is Haloke's mass?

physics

A car is moving at 37 m/s. It slams on its brakes and comes to a stop in 22 m. What was the acceleration from the brakes?

Physics

An arrow was shot vertically upward at a velocity of 50.0 m/s. What was its velocity after 2.00 seconds?

Physics

What force is needed to give a 0.25-kg arrow an acceleration of 196 m/s2? A. 0.25 N B. 49 N C. 196 N D. 748 N

Physics

A car traveling at 20 m/s accelerates at 7 m/s2 for 3 sec. How fast is it now traveling? Please help!

physics

A wave travels 750 meters in 5 minutes. Its wavelength is 16.1 meters. What is its period?

physics

An object has a charge of −2.4 ìC. How many electrons must be removed so that the charge becomes +2.8 ìC

physics capacitor

What voltage is required to store 8.0 x 10-5 C of charge on the plates of a 6.1-μF capacitor?

physics

The temperature of the air outside on a cool morning is 11„aC.What is this temperature on the Kelvin scale?

physics

The temperature of the air outside on a cool morning is 11„aC.What is this temperature on the Kelvin scale?

Physics

Calculate the pH of a solution obtained by mixing 100cm3 of 0.1M HCl and 100cm3 of 0.2M NaOH

Physics

Calculate the pH of a solution obtained by mixing 100cm3 of 0.1M HCl and 100cm3 of 0.2M NaOH

Physics

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

Physics

When a light passes from glass to air, which of the following is correct for the path of the light?

physics

A basketball player can leap upward 0.69 m. What is his initial velocity at the start of the leap?

Physics: Pressure Problem

What is the total pressure at the bottom of a lake at a depth of 38m?

physics

Bob is driving 25 m/s and he turns a corner with a radius of 37 m. How much is Bob accelerating?

Physics

A 1200.0-kg car speeds up from 16.0 m/s to 20.0 m/s. How much work was done on the car to increase its speed?

Physics

The temperature of an object is raised by 90ºC. This is equivalent to what increase in its absolute temperature?

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