# 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.