Math/Physics

206,302 results, page 57

physics

Mechanical energy is the difference between the kinetic and potential energies of an object true or false?

physics

Mechanical energy is the difference between the kinetic and potential energies of an object true or false?

physics

a .105 kg hockey puck moving at 48 m/s is caught by a 75 kg goalie at rest. With what speed does the slide on the ice?

Physics

An automobile with an initial speed of 3.56 m/s accelerates uniformly at the rate of 2.7 m/s2. Find the displacement of the car after 4.1s.

Physics

Find the speed of a pendulum bob at the bottom of its swing if its initial displacement is 5 degrees and its period is 2 s.

Physics

What is the rotational inertia of a 10 kg rod with a length of 0.9m and rotating about an axis passing through its end?

physics

In what direction and with what speep must he push away his pack in order to return to his vehicle in 30s?

Physics

Explain atomic line spectra in terms of transitions between discrete energy levels.

physics

How fast (in ) must a centrifuge rotate if a particle 8.00 from the axis of rotation is to experience an acceleration of 117000 's?

Physics

What observation shows that diamond has a slightly different index of refraction for each of the various colours of the spectrum?

physics

If four containers, 10ml to 50ml,have the same temperature, which has the greatest thermal energy?

Physics

What thrust does a 350 model rocket need in order to have a vertical acceleration of 14.0 on the Earth?

physics

using well labelled diagrams,briefly describe how you would determine the density of an irregular object

physics

a box is thrown upwards with a velocity of 8m/s and takes 2seconds to reach its maximum height.how high does it go up

Physics

Make an analogy between heat capacity and density. Describe which quantities correspond to one another. Thanks!

physics

Two charged spheres are 8.00 apart. They are moved, and the force on each of them is found to have been tripled

physics

what is the net force on a car cruising at a constant velocity on (a) a level ground and (b) going up a hill

physics

Calculate the speed at the edge of a disc of radius 4 cm that rotates at the rate of 8 rev/s. Answer in units of m/s.

Physics

Why is the total distance traveled by a mass traveling in a circle of radius R during n revolutions, 2piRn?

Physics

Explain how a drop of water bulging over the edge of a coin demonstrates surface tension.

Physics

A loud speaker emits energy in all directions at a rate of 2.75 J/s . What is the intensity level at a distance of 25 m?

PHYSICS!!

free body diagram of a 4 kg bucket accelerating downward 2 meters per second squared

Physics

(a) Calculate the speed of a proton after it accelerates from rest through a potential difference of 285 V.

Physics

What must be the orbital speed of a satellite in a circular orbit 740 km above the surface of the earth?

physics

A skater is gliding along the ice at 2.2 , when she undergoes an acceleration of magnitude 1.2 for 3.0 . At the end of that time she is moving at 5.8

Physics

A person is jogging at 3.5 m/s and grabs a rope that is hanging vertically from a tree. How high can the student swing?

physics

An acorn and tree leaf fall from the same height and time. Which reaches the ground first and why?

physics

What is the average current through a conductor that carries 4 375C during a 2 min time period?

physics

an electric motor lifts on elevator 9 m in 15s by exerting an upward force of 1.2 x 10^4 calculate the power

physics

A man moves along a semi-circle. What is the relation between distance covered (S) by him and his displacement (D)? S = D S > D S < D

Physics

How do I solve this question: What is the resistance of a laptop computer that has an 11V battery & requires 15W of power?

physics

find the speed and period of a satellite that would orbit Mars 203 km above its surface.

physics

How much heat in KJ is needed to change 3.0 kg of ice at -10C into (superheated) steam at +150C ?

Physics

Calculate  the  length  of  a  meter  stick  moving  with  a  speed  of  v  =  0.9995c  as  measured  by  an   observer  at  rest.

physics

What is the frequency of the EM wave emitted most strongly by a glowing element on a stove with temperature 1,500 K

physics

What is the period of the hand on a clock that measures the minutes? What is the frequency? Please show work, Thank you, Abbie

physics

what is the magnitude and direction of the electric field 20.0 cm directly above an isolated 33.010 neg6 C charge?

physics

suppose you apply 3 newtons of force to slide a box 2 meters in 6 seconds, how much work did you do?

Active physics

How much hear must be added to 1.5kg of water at -25degC to raise it up to 119degC?

help fast ,( physics)

What is the net electrostatic force on the charge q3 (-48ìC), due to charges q1(+78ìC) and q2 (+50ìC)?

physics

how would you measure the resistance of an electrical device, such as a lamp, by the voltmeter-ammeter method?

physics

why we cannot use visible light for studying the crystal structure using Bragg’s diffraction method?

physics

a man weighing 500N runs up a staircase half a minute he rise up by 4m. a.what work did he do? b.what was his power?

physics

a stone is thrown vertically upward with an initial velocity v0. the distance travelled by it in time 1.5v0/g

physics

a stone is thrown vertically upward with an initial velocity v0. the distance travelled by it in time 1.5v0/g

physics

A ball is thrown vertically upward with a velocity of 100m/s.It will reach the ground after hw many sec?

physics

How much heat must be absorbed by a 500 g pot of water in order to raise the temperature from 20„aC to 30„aC?

physics

How long will it take an echo to return across a canyon that is 61.0 m from one side to the other if the temperature is 25 C?

physics science

The photoelectric effect occurs only when the incident light has more than a entain minimum

physics

Wrap a cotton wool around a thermometre,will its temperature rise? Explain your answer please

physics

if the brakes of an automobile are applied from 70km/h to 35km/h, how many meters does the car travel during this deceleration?

physics help

How much energy must be removed from a 200g block of ice to cool it from 0C to -30C? What is the equation for this?

Physics 1

(II) How close to the edge of the 20.0-kg table shown in Fig. 9–47 can a 66.0-kg person sit without tipping it over?

Physics

How do you solve this using the component method? 56n, northwest + 38n, 75 degrees east of north

physics

When one end of a bar magnet is placed near a tv screen, the picture becomes distorted. Why?

physics

A rock is dropped from a 154-m-high cliff. How long does it take to fall (a) the first 77.0 m and (b) the second 77.0 m?

Physics

A female gymnast weighs 400 N. If she is hanging stationary from a high bar, how many forces are acting on her?

physics

if a ball is thrown down at an inital speed of 22 m/s, what will be its position after 2.8 seconds? acceleration is 9.8 m/s squared

Physics

What net external force is required to give a 35.7 kg suitcase an acceleration of 2.8 m/s2 to the right? Answer in units of N.

physics

if a pitcher throws a ball at 101 mph and it trvels 60.5 feet. How much wiil it drop?

physics

if a pitcher throws a ball at 101 mph and it trvels 60.5 feet. How much wiil it drop?

physics

What coefficient of friction is required to stop a hockey puck sliding at 12.3 m/s initially over a distance of 38.7 m?

physics

A bus slows down uniformly from 65.0 km/h to 0 km/h in 20.0 s. How far does it travel before stopping? Answer in units of m

physics

A speedboat increases in speed from 19 m/s to 31.4 m/s in a distance 193 m. Find the magnitude of its acceleration. Answer in units of m/s

physics

using newtons third law explain what is meant by action and reaction pairs of forcess

Physics

A 27.59 kg child is on a swing that hangs from 2.26-m-long chains. What is her maximum speed if she swings out a 48° angle?

physics

A body is projected vertically upwards at a speed of 63m/s. if g = 9.8m/ s². Find the maximum height reached?

physics

how high a building can superman jump over if he is to leave the ground with a velocity of 60 m/s at an angle of 75 degrees

physics

what is the net force needed to lift a full grocery sack weighing 210N uniformly?

Physics

What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?

physics

five hundred kcal of heat is added to 2-kg of water at 80⁰C. how much steam is produced?

Physics

five hundred kcal of heat is added to 2-kg of water at 80⁰C. how much steam is produced?

physics

Two objects attract each other gravitationally with a force of 2.1×10−10 when they are 0.25 apart. Their total mass is 4.50 .

Physics

A 1.21 kg block slides down a 25.0 m long 25.0° incline at constant velocity. How much work is done by friction?

physics

the time a male bungee jumps is freely falling is 1.5 seconds. what is the velocity of the jumper at the end

physics

if a bus traverses a distance of 10,000 cm with the uniform velocity of 10 m/sec, what is its total time of travel?

physics

If your boat weighs 1600 N, how much water will it displace when it’s floating motionless at the surface of a lake?

physics

How long does it take light to travel through a 3.2mm -thick piece of window glass?

physics

an airplane flying at 150 km/hr encouters a headwind of 30 km/hr. draw a vector diagram of this including the resultant.

Physics

What minimum speed does a 170 g. puck need to make it to the top of a 6.0 m. long, 27 frictionless ramp?

physics

find the total mechanical energy of a mass-spring system with m=1.24 kg and maximum speed 0.670 m/s

Physics

Calculate the rotational inertia of a wheel that has a kinetic energy of 41.6 kJ when rotating at 264 rev/min.

Physics

A record has an angular speed of 47 rev/min. Through what angle does it rotate in 1.07 s? Answer in units of ra

physics

A ball of mass xg is release from a height of 20m . Calculate the time taken to fall to the ground.

physics

A ball of mass xg is release from a height of 20m . Calculate the time taken to fall to the ground.

physics

How many calories of heat are required to convert 230 grams of ice at -10.0C to a gas with a temperature of 1500C?

physics

A force of 10N is used to lift 600-kg ball from the ground to the a height of 1.8m when it is let go. What is the speed of the bal when it is let go?

Physics

A 822 kg car accelerates from rest to 101 km/h in 1.15s. What change in momentum does the force produce?

physics

A child slides down a hill on a toboggan with an acceleration if 1.5 m/s2^2. If she starts at rest, how far has she traveled in (a) 1.0s,(b) 2.0s, and (c) 3.0s?

physics

A small motor runs a lift that raises a load of bricks weighing 916 to a height of 12.7 in 28.2 .

physics

a rolling ball covers a distance of 650m in 20 min. its speed in kilometer per hour will be what?

Physics

What is the acceleration acting on a grandfather clock's pendulum, of length 0.9m, with a maximum angular displacement of 0.1rad?

physics

Calculate the time elapsed if the speed of a truck going south is reduced from 80 km/h to 44 km/h in a distance of 250 m.

Physics

If a force of 15.0 N directed east acts on a stationary 5.00 kg mass, what are its acceleration, displacement, and velocity after 10.0 s?

Physics

If a force of 15.0 N directed east acts on a stationary 5.00 kg mass, what are its acceleration, displacement, and velocity after 10.0 s?

Physics/Science

Why would someone using a Foucault Pendulum at the equator say that Earth does not rotate?

physics

a baseboard heater draws a current of 10.0A. How much charge passes through it in a time of 30 min?

Physics

A steel guitar string is 73 cm long and 0.15 mm in diameter. If it's under tension of 1.5kN, how much is it stretched?

physics

Calculate the speed of a ball tied to a string of length 1.5 m making 4.6 revolutions every second.

physics

The specific heat of pure water at 15 degrees celsius is 4184j/(kg.k). Convert this to kcal/(kg.k). pls help

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