Math/Physics

207,240 results, page 92

Physics

Calculate the pressure on the top lid of a chest buried under 4.30 meters of mud with density 1.75 103 kg/m3 at the bottom of a 12.5-m-deep lake

physics

What is the angular momentum of a 2.43 kg uniform cylindrical grinding wheel of radius 12.5 cm when rotating at 1600 rpm? (b) How much torque is required to stop it in 8.00 s?

PHYSICS

Calculate the pressure on the top lid of a chest buried under 4.30 meters of mud with density 1.75X 10^3 kg/m^3 at the bottom of a 12.5 m deep lake

physics

A bullet is fired straight up from a gun with a muzzle velocity of 208 m/s. Neglecting air resistance, what will be its displacement after 2.6 s? The acceleration of gravity is 9.8 m/s2 .

physics

A 244 g particle is released from rest at point A inside a smooth hemispherical bowl of ra- dius 21.7 cm, as shown in the figure The acceleration of gravity if 9.81 m/s2 .

physics 1

A 8.00-kg block of ice, released from rest at the top of a 1.44-m-long frictionless ramp, slides downhill, reaching a speed of 2.54m/s at the bottom.

Physics

Determine the moment of inertia for three children weighing 64.0 lb, 44.0 lb and 83 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.

physics

1) How many seconds does it take a car traveling 40 mph, decelerating at a rate of 7 miles per second, to come to a complete stop? 2) How many feet?

physics

In state-of-the-art vacuum systems, pressures as low as 1.00 10-9 Pa are being attained. Calculate the number of molecules in a 1.80-m3 vessel at this pressure and a temperature of 31.0°C.

physics

a jogger does 2.5 *10^5 of work during an exercise routine. her internal energy decreases by 6.8*x10^5. how much heat did she absorb or give off?

Physics

A baseball with mass of 0.145 kg is thrown straight down at the ground. At a particular speed, it has a drag force of 0.4 N acting on it. What is its acceleration at that time? -2.8m/s^2

physics

A quarterback threw a football at 27 m/s at a certain angle above the horizontal. If it took the ball 3.3 s to reach the top of its path, how long was it in the air? s

Physics

Converging lens has focal lenght 8 cm , at what distance you will have to place the object in the following devices; 1) Collimator of Spectrum 2) Terrestrial Telescope

Physics

A point on a wheel rotating at 5revs/s is located 0.20m away from the axis. What is the centripetal acceleration? a. 198m/s^2 b. .05m/s^2 c. 48m/s^2 d. 1.35m/s^2

College Physics

An electron in a television tube travels the 12 cm distance from the grid to the screen at an average speed of 7.00 107m/s. How long does the trip take?

physics

With an average acceleration of −1.3 m/s2 , how long will it take a cyclist to bring a bicycle with an initial speed of 13.7 m/s to a complete stop? Answer in units of s.

physics

The brakes of a car traveling at 16 m/s can decelerate it until it stops after 10m. Find (a) its negative acceleration, and (b) the time requires to stop

physics

a man raises a mass,m to a height ,h and then shifts it horizontally over a distance ,x. find the total work done against the force of gravity?

Physics Dynamics

An arrow has an initial launch speed of 32 m/s. If it must strike a target 38 m away at the same elevation, what should be the projection angle?

Physics

What is the difference in blood pressure (mm−Hg) between the top of the head and bottom of the feet of a 1.82m tall person standing vertically?

Physics Circular Motion

What is the maximum speed for a car to safely negotiate a 30 banked curve of 60 m radius if there is a coefficient of static friction of 0.35?

physics

A lead pellet is propelled vertically upward by an air rifle so that its initial speed is 49 m/sec. Find its total time of flight.

Physics

two small spheres lie 1.5 meters apart and carry identical charges. How large is the charge on each if a sphere experiences a force of 2.0 N.

physics

How long does it take a plane, traveling at a constant speed of 233 m/s, to fly once around a circle whose radius is 2090 m?

Physics

Please help me with this question How much work is done by a boy of mass 70kg who ran up a flight of 31steps each15m high. Take g=10m/s^2

Physics

Calculate the energy released when 235 U fissions resulting in two lighter stable nuclei with mass numbers 140 and 93.Please help!

Physics

An echo in Cowboys Stadium is heard after 2 seconds. How far is the person standing from the wall if the speed of sound is 340 m/sec?

physics

calculate how far along the ground would the bicycle move if one of the wheels had an angular displacement magnitude of 500rev

physics

A 50 kg girl runs up the stairs to a floor 6m higher in 10 s. What is her power output? P=f.dt P=(50kg x 10m/s2 x6m) __________________ 10 = 300J/s or 300 watts

mathematical physics

Determine the scale factors for an orthogonal coordinate system (s,t,v) whose coordinates are related to the Cartesian by the following equations: x = 2st, y = s^2-t^2, z = v.

mathematical physics

Separate the following partial differential equation into a set of three ODEs by the method of separation of variables. d^2/dt^2 = c^2[d^2u/dr^2+1/r du/dr+1/r^2 d^2/d theeta^2]

mathematical physics

Separate the following partial differential equation into a set of three ODEs by the method of separation of variables: d^2u/dt^2 =c^2,[d^2u/dr^2+1/r du/dr+1/r^2 d^2u/d theeta^2]

physics

A stationary pool ball with mass 0.20 kg is struck with an average force of 35 N over a time of 18 ms. What speed does it have just after impact?

Physics

A girl weighing 310 N sits on a hammock supprted by two ropes. Each tied 60 degree from vertical posts. What is the tension on each rope?

physics

In a gas two waves of length 1m and 1.10m have a frequency difference of 10/3 Hz, the velocity of sound is ? a) 166m/s b) 332m/s c) 83m/s d) 336.7m/s

physics

A proton with charge mass ratio of 108 C/kg is moving in a circular orbit in a uniform magnetic field of 0.5T .Calculate the frequency of revolution.

physics

a projectile is fired at 30 degree above the horizontal with an initial speed of 600 m/s. find the direction and magnitude of the velocity after 2 seconds?

PHYSICS

3 PARTICLES OF MASS 1KG,2KG,3KG PLACED AT CORNER A,B,C OF AN EQUILARERA TRIANGLE A,B AND C.LOCATE THE POSITION OF PARTICLE/FIND COORDINATES

physics

A bullet is fired straight up from a gun with a muzzle velocity of 217 m/s. Neglecting air resistance, what will be its displacement after 9 s? The acceleration of gravity is 9.8 m/s2 .

Physics

Two forces whose resultants is 100N are perpendicular to each other. If one of them makes an angle of 60 degree with the horinzontal. Calculate its magnitude

Physics

The slab of steel shown below is being lifted at 0.50 m/s. It weighs 1.91×103N. If the angle θ equals 61.4 degrees, what is the tension in each cable?

Physics

6. A car traveling 64 km/hr (40 mi/h) brakes suddenly to avoid a dog crossing the road. It accelerated at a rate of -1350 mi/h2. What was its speed after 0.5 min?

PHYSICS

Calculate the stress, strain and young's modulus of a wire with a cross-sectional area of 3 x 10^-7 m^2 and a length of 0.6 m that is stretched to a distance of 1.2 x 10^-3 by a 120 N force.

Physics

A bullet shot horizontally strikes the ground with a velocity of 150.0km/h (10 degrees below the horizontal), determine the height from which it was fired.

Physics

what is the equation describing the motion of mass on the end of a spring which is streached 8.8 cm from equlibrium and then released from rest and whose period is .66 s ? what will be its displacement after 1.8 s

Physics

Sky divers falls out of a plane at an altitude of 11750 m. How much time in seconds will they pass before they deploy their parachutes?

physics

A 2kg rock is thrown downward from a height of 3 meters with an initial velocity of 4 m/s. Just before it hits the ground its speed is _____.

Physics

Calculate the pressure exerted by 75 cms of vertical length of a water column in SI units. Options: A. 7390Pa. B. 7560Pa. C. 7250Pa. D. 7350Pa.

physics

what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away?(use g=10m/s square)

Physics

The 3.1 kg box shown below slides with a constant speed down an incline at an angle of θ = 28.0° to the horizontal. What is the coefficient of kinetic friction?

Physics

A bicycle with tires 64 cm in diameter travels 5.2 km . Part A How many revolutions do the wheels make? Express your answer using two significant figures.

physics

A uniform chain 10m long and weighing 6 kg permetre hangs vertically.calculate the work required to wind it up.. Plzz solve it

physics

four particles of masses 1kg, 2kg,3kg, and 4kg are at vertices of a rectangle of sides a and b.if a=1m and b=2m find the location of the center of mass

Physics

A girl is floating in a freshwater lake with her head just above the water. If she weighs 395 N, what is the volume of the submerged part of her body?

Physics

A gram molecule of a gas at 127°C expands isothermally until its volume is doubled. Find the amount of work done and heat absorbed.

physics(optics)

The critical angle between an equilateral prism and air is 45 degrees.if the incident ray is perpendicular to the refracting surface,then what happens?

Physics

An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping? ((((((The answer is " 7.5 m " ))))) Can you please show me the solution.

Physics

During takeoff, a plane goes from 0 to 50 m/s in 8s. What is its acceleration? Halos fast is it going after 5 s? How far had it traveled by the time it reaches 50 m/s?

Physics

A 1.8 kg rectangular air mattress is 2.46 m long, 1.23 m wide, and 0.189 m thick. What mass can it support in water before sinking? Answer in units of kg.

physics

A ball is thrown vertically upward with a speed of 19.0 m/s. (a) How high does it rise? (in meters) (b) How long does it take to reach its highest point? (in seconds)

physics

A ball is thrown directly downward with an initial speed of 8.95 m/s, from a height of 29.0 m. After what time interval does it strike the ground? answer in (in seconds)

physics

Jessica stretches her arms out 0.6 m from the center of her body while holding a 2 kg mass in each hand. She then spins around on an ice rink at 1.1 m/s.

physics

A missile is fired at an initial velocity of 1500m/s. What should be the angle to reach a maximum horizontal target? (Show proof) I need your help.

Physics

a 35 kg child slides down a 26 degree incline. the coefficient of kinetic friction is 0.33. what is her speed after sliding for 2.5 seconds starting from rest?

physics

weights of man 10kg and 8kg are placed near p and q respectively one each end of the beam calculate the Reactions at p and q. [1kg is 10N]

Physics

An outfielder throws a 2.12 kg baseball at a speed of 114 m/s and an initial angle of 54.8 ◦ . What is the kinetic energy of the ball at the highest point of its motion?

physics

an electric heater with a resistance of 40 requires 220v across its terminals. a,what is the power dissipated in the resistor b,how much heat is transferred in 1hour

physics

use a scale diagram to determine: 1.the image distance 2.magnification for an object placed 1cm in front of a convex lens of 10cm

Physics

Is Gc (32.2 lbmft/lbfs^2) equal to gravity? I think it is, but I'm kinda confused about the whole concept. Could someone explain it to me? Thank you very much.

Physics helllppp

8] Find the minimum stopping distance for a car moving at 108km/h if the coefficient of static friction between the tires and road is a) 0.9

Physics

Find The Potential Energy Of A Boy Mass 10kg Standing On A Building Floor Of 10 Metres Above Ground Level. 10*10*10 =1000

physics

With what frequency would you have to push a child on a swing that had supporting chains that were 2.3 m long? Express your answer in Hz to 3 significant digits.

Physics

A bullet of mass 200 grams is forced with work speed of 400 m/s of it is stopped in 100 m, Find: a.) KE b.) Force needed to stop it

Physics

Abby went skiing and was sliding down a 10 degrees hill. Ignore friction and air resistance. What is the x-component of the weight? The mass is 76-kh

Physics

A ball is projected so as to reach a height h passes points p and q with velocites v/2 and v/3 where v is the initial velocity with which the body is thrown the distance between p and q in terms of h is

Physics

A car requires velocity of 36 km/h in 10sec just after the start . It takes 20sec to stop . Calculate the acceleration in both the cases .

Physics help

How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass? How do I rearrange the formula to solve for v m = n/sqrt(1-(v^2)/c^2))

physics

A train is moving with an initial velocity of 30 m/s the breaks are applied so as to produce uniform acceleration of minus 1.5m/s Calculate the time in which it will come to rest

physics

the resistance of a platinum resistant thermometer is 1.2ohms. when the measuring in Kelvin temperature of oil and 1.0ohms at the triple point of water. find T

physics

What's kinetic energy in electron volt of a triply ion iron which has been accelerated from rest through a potential difference of 100v?

Physics

An electron with a kinetic energy of 0.8 keV is fired normal to the lines of a field of magnitude 50 G. Find: a)the radius of the path b)its acceleration c)its period

physics

a car whose brakes are locked skids to a stop in 100m from an initial velocity of 20m/s. find the coefficient of sliding friction

Physics

A particle covers an angle of 120¡ã while moving along the circumference of a circle. Find distance and displacement.

physics

A bus is moving at a speed of 20m/s beyond to slow at a constant rate of 3m/s each second find how far it goes before stopping

Physics

A bomb explores in mid air into two equal fragments.what is the angle between their direction of motion? Ans:- 180°

Physics

You are testing a car on the Nevada salt flats traveling 85 m/s. Your parachute deploys and you decelerate at 13 m/s^2. How long does it take to come to a complete stop?

Physics

I think it is D) but I'm not quite sure. Thanks in advance! Right after the ball is thrown at angle of 45 deg, the acceleration is a)g b)sin(45) * g c)cos(45) * g d)tan(45) * g

physics

An airplane accelerates down a runway at 3.33 m/s2 for 35.3 s until is finally lifts off the ground. Determine the distance traveled before takeoff.

physics

a 1240 kg automobile stops in a distance of 41m. if initial velocity was 22.5m/s, what force did the road exert on the car to stop it? Answer pls... Thank You

physics

a 1240 kg automobile stops in a distance of 41m. if initial velocity was 22.5m/s, what force did the road exert on the car to stop it? Answer pls... Thank You

physics

Scalar product of three vectors? Given:A=(axi+ajy+azk) B=(bxi+bjy+bzk) C=(cxi+cjy+czk)

PHYSICS

What is the magnitude of the instantaneous velocity (speed) of a freely falling object 13 s after it is released from a position of rest? Consider the acceleration of gravity to be 10 m/s2 .

Physics

compute for the power while pushing an object by a 200N force making 18 degrees above the horizontal covering a distance of 7.5m in 0.5 minute?

Physics

A baseball with a mass of 0.145 kg is thrown straight down at the ground. At a particular speed, it has a drag force of 0.4 N acting on it. What is its acceleration at that time? a. -7.0 m/s2 b. -2.8 m/s2 c. -9.8 m/s2 d. -12.6 m/s2

Physics, Class XI

If a force of 15 kg. weight acts on a mass of 14 kg, what will be its velocity after 8 seconds? What is the process to apply the formulas in this question? Please help me fast!

Physics

A brick of mass 2kg just begins to slide down an inclined plane at an angle of 45 degree with horizontal.what will be the force of friction

physics

calculate the volume in cubic centimeters and area in square millimeters of a spherical bacterium of diameter 2.0um. model the bacteria is spheres

physics

A certain vehicle can accelerate from rest to a speed of 25m/s in a time of 8s.What average power is needed to cause this acceleration?Neglect frictional losses

Physics

Two blocks of masses 2.9kg and 3.9 kg are held by string upper and lower and given the acceleration 0.2 in upward direction gind tension

Physics, Science

How would the length of a day be affected if all the world’s inhabitants continuously walked in an easterly direction? When they stopped walking?

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