Math/Physics

206,551 results, page 84

physics PLEASE I NEED HELP

Wally now lift the box of the floor and put it on a shelf. Does he doing any work? If not why? If so .what energy change is accurring?

physics

What's the shortest air column , closed at one end, that will resonate at a frequency of 440.0Hz when the speed of sound is 352 m/s

physics

a 1.0kg ball is thrown upward from 1.0m above the ground with a speed of 10m/s reaches a height of 4.5 m. what is the efficiency of the energy transformation?

Physics

A basketball player throws a ball at an angle of 30º above the horizontal. At what point does the magnitude of the acceleration reach a minimum?

Physics

Three charges (q1 = 8.7 nC, q2 = -7.2 nC, and q3 = -4.8 nC) are at the corners of a square of side a = 9.2 cm, as shown in the picture. Determine the magnitude of the resultant electric force on each charge.

physics

A body moves along a straight line from rest with an acceleration of 2m/s². Calculate the time taken by it to cover a distance of 100m.

physics

determine the tension in a cable needed to lift a 2000 kg elevator with an acceleration of 1.5 m/s.squared. How would you solve this? ): Which formula do you use?

physics

Two forces of 5kg wt and 10kg wt are acting at an inclination of 120 o between them. Find the magnitude and direction of resultant force.

Physics

A bug completes one lap along the edge of a circular planter of radius 22.4 cm in 16.45 s. How fast was it traveling? Answer in units of cm/s.

physics

If the potential difference between a cloud and the ground is about 17 , how much charge is transferred in a lightning bolt that releases 1.2 of energy?

physics

If we wanted a block of iron of mass 3.25 kg to acquire a positive charge of 0.100 C, what fraction of the electrons would we have to remove?

physics

When moving at highway speed, a Triumph America motorcycle is capable of accelerating at 2.1 m/s2. At this rate, how long does it take to accelerate from 103 km/h to 88 km/h?

PHYSICS

When moving at highway speed, a Triumph America motorcycle is capable of accelerating at 2.1 m/s2. At this rate, how long does it take to accelerate from 103 km/h to 88 km/h?

Physics

If a satellite is orbitting the earth 710km above the earths surface, and it's velocity is 7,406.8 meters/sec, what is it's cetripedal acceleration??

physics

At highway speed, a particular car is capable of an acceleration of about 1.7m/s^2.At this rate how long does it take to accelerate from 90 km/h to 110 km/h? (in seconds)

physics

what is the maximum speed at which automobile can round a curve of 100 ft radius on level if the coefficient of friction between the tires and the road is 0.35?

physics

a car traveling in a straight line has a velcoity of 2.43 m/s at some instant. After 6.73 s, its velocity is 9.81 m/s. what is its average acceleration in this time interval?

physics

a car traveling in a straight line has a velcoity of 2.43 m/s at some instant. After 6.73 s, its velocity is 9.81 m/s. what is its average acceleration in this time interval?

physics

Research on the scientific principle involved in the inflation of an airbag. Explain how this device protects the driver and the front passenger from injuries.

physics

Research on the scientific principle involved in the inflation of an airbag. Explain how this device protects the driver and the front passenger from injuries.

Physics

If a ball is kicked at 35 degrees above the horizontal, what is the speed to barely clear the 3m tall goal post 60m away?

physics

If a ball is kicked at 35 degrees above the horizontal, what is the speed to barely clear the 3m tall goal post 60m away?

physics

a baseball is thrown at an angle of 24 degrees relative to the ground at a speed of 23.4m/s. the ball is caught 41.4798m from the thrower. how long is it in the air?

physics

A diver steps off a cliff and dives from 40 meters into the ocean. How long will he fall before he hits the water?

physics

The radius of a merry-go-round is 7 meters, and it takes 12 seconds to make a complete revolution. What is the speed of an atom on the outer rim?

physics

how long will it take a 1750-watts motor to a lift a 285-kg piano to a sixth storey window 1.6 meters above

physics

Leroy, who has a mass of 90 , is skateboarding at 8.6 when he smacks into a brick wall and comes to a dead stop in 0.2 .find the force of impact

physics

how can we collect sound energy from outside? then it can be converted into electricity with the help of transducer. Have to prepare a model on this. Please earlier.

physics 101

50kg drops from a height of 2meters straight down with a force constant of 8 x 1000n/m. What maximum distance does she compress?

Physics

How does the cochlea sense sound? •Snail shaped tube lined with receptor cells which transmits signals to the brain. Correct?

Physics

A skier is gliding along at 5.0{\rm m/s} on horizontal, frictionless snow. He suddenly starts down a 15{\rm ^{\circ}} incline. His speed at the bottom is 15{\rm m/s} .

physics

If a seagull flies to a height of 22.5 meters, how long will the clam take to fall? The acceleration of gravity is 9.8m/s. answer in units of sec

physics

Calculate the magnitude of the electrostatic force the two down quarks inside a neutron exert on each other if they are separated by a distance of 0.71 fm.

physics

explain the scientific method for dropping a penny from the empire state building to see if it will penetrate someones head below

physics

A 67.5 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.090 m/s. How much work must be done to stop it?

Physics

a major league outfielder throws a baseball horizontally with a velocity of 22 m/s, released from a height of 1.8m. how far does it go before it hits the ground ?

physics

two electric charges +10 microC and -20microC are located .35 m apart how much work is required to double the distance between them?

physics

two electric charges +10 microC and -20microC are located .35 m apart how much work is required to double the distance between them?

physics

A 50 kg diver leaps off the 20 meter diving board with a velocity of 5 m/s. What is his kinetic energy just before hitting the water?

Physics

A satellite is to be put into a circular low earth orbit at 149 km above surface. What orbital speed (km/s) is required?

physics

(a) ____Fe(s) + ____S(s)h____Fe2S3(s) (b) ____P4 (s) + ____H2(g)h____PH3(g) (c) ____NO(g) + ____Cl2(g)h____NOCl(g) (d) ____SiCl4(l ) + ____Mg(s)h____Si(s) + ____MgCl2(s)

PHYSICS

COULD YOU FURTHER EXPLAIN HOW MANY BTU ARE REQUIRED TO RAISE THE TEMP OF500 GALLONS OF WATER FROM 70 DEGRESS TO 160 DEGREES FAHRENHIET

Physics

How long would a braking torque of 3.17 N·m have to act to just stop a spinning wheel that has an initial angular momentum of 6.67 kg·m2/s?

Physics

A 16 kg box slides across the floor with an initial velocity of +7.8 m/s. It comes to a stop after sliding +14.6 m. How much friction was present?

Physics

Describe the waves reflected from an elliptical reflector when the incident wave comes from a point source at one focus of the ellipse?

Physics- Help

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

Physics- Help

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

Physics- Help

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

physics

carbon dioxide forms into solid (dry ice)at approximately -150 F. What temperature in degree celsuis does this correspond to?

physics

water is moving at a velocity of 2m/s through a hose with an internal diameter:1.60cm. What is the flow rate in liters per second?

Physics

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 83 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

Physics

how fast would you have to be traveling at in a spaceship in order to appear to age 20% slower than your classmate left behind on earth

Physics

Three resistors 2.5 Ù, 3.5 Ù and 4 Ù are connected in parallel. What is the equivalent resistance? I know you must use 1/Req = 1/R1 + 1/R2 + 1/R3 But then I get .935 and I don't think that's correct. What am I missing? Thanks

PHYSICS PLEASE HELP!

Two nitrogen atoms are separated by 4 cm. Each atom has 2 extra electrons. What is the force between them? is it attractive or repulsive? Explain.

Physics

A stone popelled from a catalpult with the speed of 50m/s attained a height of 100m. Calculate the time of flight and angle of projection.

physics

what frequency and period would be required for sally and her hard-working partner to produce a standing wave with three nodes?

Physics

Calculate the magnitude of the drag force on a missile 63 cm in diameter cruising at 220 m/s at low altitude, where the density of air is 1.2 kg/m3. Assume C = 0.75.

Physics

A satellites are placed in a circular orbit that is 1.62 × 108 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?

physics

How fast is a city on the earth's equator (such as Singapore) moving due to our planet's daily spin on its axis?

Physics

in a wire AB of uniform cross section in which a potential gradient of 0.1 V/m exist.If the balancing point is foung to be 180 cm from A then what is the Emf of the cell?

Physics

An electric filament can heat 200 cm3 of water from 5°C to 95°C in 6 minutes. If the voltage source is a 12 V battery, how much current does it draw?

physics

A 71.1 kg man steps out a window and falls (from rest) 1.24 m to a sidewalk. What is his speed just before his feet strike the pavement?

Physics

What is the total kinetic energy if a 0.30 kg block is sliding on a smooth horizontal surface at 2.5 m/s, heading towards a light spring that is in equilibrium?

Physics

What is the total kinetic energy if a 0.30 kg block is sliding on a smooth horizontal surface at 2.5 m/s, heading towards a light spring that is in equilibrium?

physics

if a cyclist takes one minute to comple half revolution on a circular path 120 m radius.what is the average velocity?

physics

2 balss,one of iron and the other of aluminium,will experience the same upthrust, when dipped in water when both have equal what?

Physics

How much work is done pushing a wheel barrow full of cement 5.3m forward if a force of 500N is applied 20 degrees from the vertical?

Physics/Optics

What would the image size of the moon be if you photographed it at Cassegrain focus of a 24-inch telescope with a focal length of 9600mm?

Physics

Moment of inertia of a 'non-uniform' ring of mass M and radius R about axis through centre and normal to its plane is

physics

A group of hikers hears an echo 2.50 s after shouting. If the temperature is 20.0°C, how far away is the mountain that reflected the sound wave?

Physics

An object of mass 20kg slides down an inclined plane at an angle of 30 degree to the horizontal. The coefficient of static friction is?

physics

A production line inspector wants a mirror that produces an image that is upright with a magnification of 7.1 when it is located 10.0 mm from a machine part. What is its radius of curvature?

PHYSICS

A SPRING WITH A CONSTANT K = 8N/m IS STRETCHED 5CM AND RELEASED. IT BOBS UP AND DOWN EVERY 2.5 SECONDS. WHAT IS ITS FREQUENCY, PERIOD, ABD AMPLITUDE

physics

The distance between two planets is 1.6 x 10^6 m. How much time would the light signal take to go from one planet to the other?

Physics

Temperature of a diatomic gas is 300k. If the moment of inertia of its molecules is 8.28*10^-38 gm-cm^2. Calculate their root mean square angular velocity.

Physics to Elena

Ex=0 ; Ez=0 Ey = 10   sin(3.14x - 6.08e8 t) what is the time-averaged Poynting vector (magnitude and direction) for the position x=y=z=−3 ?

PHYSICS/CHEMISTRY

Can someone explain to me, what does Metastable isotope means? I already read the definitions on the internet but I really don't understand it. Thanks in advance.

physics

a 75-kilogram bicylcist coasts down a hill at a constant speed of 12 meters per second. what is the kinetic energyof the bicyclist?

physics

How many calories of heat must be added to 455 g of steel to raise its temperature from 20 °C to 192 °C? (Note: csteel = 0.115 cal./g. °C.)

physics

How far to the nearest tenth of a meter can a runner running at 5.33 m/s run in the time it takes a rock to fall from rest 67 meters?

physics

A solid sphere of mass 2 kg is rolling without slipping on a table with linear speed of 0.5 m/s. Calculate its total kinetic energy.

Physics

At what distance should an object be placed in front of a convex lens of focal length 20 cm to obtain an image of double its size

science (physics)

a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)

Physics

An arrow of mass 1000kg was fired from rest with a velocity of 15m/secs for a period of 0.5secs.calculate the applied force.

physics

a monatomic gas initially at 19 degree celsius is suddenly compressed to 1/10th its original volume .what is temperature after compression?

physics

two ropes are tied on a post and applied with forces of 8 and ion.If the amgle between them is 60degrees. Find the resultant vector

Physics

A block weighing 6.2 N requires a force of 2.2 N to push it along at constant velocity. What is the cooefficient of friction for the surface? Plsssss help asap..

physics

What mass would you hang on the right side of the system in the figure to balance it -- that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 30 cm and x2 = 12 cm.)

Physics

The flux through a window whose surface is parallel to magnetic field lines is zero. Answer True False

Physics

A material that remains highly magnetized after a magnetization cycle has a large hysteresis area. Answer True False

physics (fluids)

If a object of radius 3 cm is attached to the ground in a 3 m deep sea, what is the vertical force in N with which the water (density = 1000 kg/m^3) presses on it?

physics

Using a small pendulum of length 0.171 m, a geophysicist observes that it completes 1 cycle every 0.833 s. What is the value of g at his location?

physics

An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter eardrum so exposed?

physics

An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter eardrum so exposed?

physics

An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter eardrum so exposed?

physics 2

calculate the mass of air inside a 500 liter container at a pressure of 200 kpaa and temperature is 30 degree celsuis

Physics

“Strontium-90 is a pure beta source.” How could a physicist test this statement? I am stuck on this one, but I was thinking through measurement of radioactivity.

physics

A bullet was fired horizontally from the top of a 1.5x10^2 m tall tower at 2.8x10^2 m/s. Determine its speed on impact with the ground below.

Physics

If Joe rides south on his bicycle in a straight line for 29 min with an average speed of 14.8 km/h, how far has he ridden? Answer in units of km

Physics

A boy sledding down a hill accelerates at 1.24 m/s2 . If he started from rest, in what distance would he reach a speed of 8.88 m/s? Answer in units of m

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