Math/Physics
212,527 results, page 60

physics
Why do car have head rest?your answer should include the word"force"and "velocity" 
physics
what has more inertia? a toy car going 1000mph or a cruise ship sitting at the dock 
physics
explain why microwaves are better carriers of signals for long range transmission of radio waves? 
Physics
How many Joules of thermal energy must be added to 5 kg of water at 20 C to bring it to the boiling point (at 100 C)? 
physics
You drop a stone down a well. You hear the splash 2.23 s later. How deep is the well? speed of sound 343 m/s 
Physics
What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m? 
Physics
What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m? 
physics
when you do work to push an object horizonatally on a frictionless surface what energey change is taking place? 
physics
wally holds a pillow over his head for an hour does he do any work ? if not y? what energey changes is accouring? 
PHYSICS
1. A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance? 
physics
Explain how an object can orbit a planet & why astronauts float around in the orbiting space shuttle 
Physics
A 6.25 kg solid ball with a radius of 0.185 m rolls without slipping at 3.55 m/s. What is its total kinetic energy? 
Physics
What is the magnitude of the average force required to stop an 1500 kg car in 8.0 s if the care is traveling at 95 km/h? Sum of F = ma? 
physics
a racing car has a uniform acceleration of 4ms2. what distances will it cover in 10s after start? 
Physics
Find the pressure exerted by a waterbed with dimensions of 2m x 2m which is 30 cm thick. (hint:use density of water) 
Physics
Does the trend of the change in shape of the graph as temperature increases differ when a different gas is examined? 
Physics
At a given temperature, what relationship appears to exist between a gas particle's mass and its speed? 
physics
An automobile starts from rest and 110 ft attains a speed of 30 mi/h. In what time has it traveled this distance and the is the acceleration? 
physics
why it is easier to tear a paper towel off a full roll than a mostly used one? 
Physics
If two forces act at a point making an acute angle between them, find the resultant. 
physics
A 3.18 kg. bucket of water is being lowered into a well. It is accelerating downwards at 0.54 m/s2. What is the upwards tension in the rope 
Physics
can you please help me in telling me the uses of each electromagnet wave? like explain each briefly and what are they used for? thankyou 
Physics
Is this true or false? All objects moving in a circle are accelerated. I really don't uderstand this question. 
Physics
Two forces of 4 N and 6 N act at a point along the same horizontal line. What is its resultant force? 
Physics
An elevator is moving upward at 0.90 m/s when it experiences an acceleration 0.40 m/s2 downward, over a distance of 0.64 m. What will its final velocity be? 
Physics
An elevator is moving upward at 0.90 m/s when it experiences an acceleration 0.40 m/s2 downward, over a distance of 0.64 m. What will its final velocity be? 
physics
An elevator is moving upward at 1.20 m/s when it experiences an acceleration 0.25 m/s2 downward, over a distance of 0.71 m. What will its final velocity be? 
Physics
An elevator is moving upward at 0.97 m/s when it experiences an acceleration 0.34 m/s 2 downward, over a distance of 0.80 m. What will its final velocity be? 
physics
A plane flies south at 220 km/h and is blown west by a 90. km/h wind. Calculate the resultant speed. 
physics
An elevator is moving upward at 1.00 m/s when it experiences an acceleration 0.28 m/s2 downward, over a distance of 0.74 m. What will its final velocity be? 
physics
An elevator is moving upward at 0.93 m/s when it experiences an acceleration 0.29 m/s2 downward, over a distance of 0.67 m. What will its final velocity be? 
physics
At the end of a race a runner decelerates from a velocity of 7.00 m/s at a rate of 0.400 m/s^2. (a) How far does she travel in the next 15.0 s 
Physics
A truck covers 40.0 m in 9.40 s while smoothly slowing down to final speed 2.35 m/s. Find its accelerations 
physics
A roller coaster travels 101 ft at an angle of 56.8 above the horizontal. How far does it move horizontally? 
physics
meteoroid is speeding through the atmosphere, traveling east at 17.0 km/s while descending at a rate of 11.7 km/s. What is its speed, in km/s? 
physics
two masses are in the ratio 1:2 are thrown vertically up with the same speed . what is the effect on time by the mass? 
Physics
A rock is thrown upward at 65.2 ◦ with respect to the horizontal. As it rises, its vertical component of velocity 
physics
what is the acceleration of a point on the time of a flywheel 0.90 m in diameter, turning at the rate of 1200 rev/min? 
Physics
A meteoroid is speeding through the atmosphere, traveling east at 14.8 km/s while descending at a rate of 12.5 km/s. What is its speed, in km/s? 
Physics
A meteoroid is speeding through the atmosphere, traveling east at 14.8 km/s while descending at a rate of 12.5 km/s. What is its speed, in km/s? 
Physics
You throw a ball downward from a window at a speed of 2.7 m/s. How fast will it be moving when it hits the sidewalk 2.9 m below? 
physics
what is the electric charge force between two chaged particles (q1=+5C and q2=+6C) if the chardes are 2 meters apart? 
physics
A cara accelerates uniformly from rest to a speed of 21.9 km/h in 8.5 s. Find the distance it travels during this time. 
Physics
A ball is thrown downward at 12.3 m/s. How much time does it take for it to reach the ground, 182.6 m below? 
College Physics
What minimum speed does a 95.9 g puck need to make it to the top of a 2.7mlong, 15° frictionless ramp? 
Quantum Physics
An electron drop to what energy level is likely to emit a photon in the infrared region? 
Physics
An elevator is moving upward at 1.03 m/s when it experiences an acceleration 0.31 m/s2 downward, over a distance of 0.73 m. What will its final velocity be? 
physics
a bomb of mass 5 kg explodes in to two equel fragments. At what angle these fragment fly apart ? 
physics
A car traveling 28 mi/h accelerates uniformly for 6.7 s, covering 555 ft in this time. What was its acceleration? Answer in units of ft/s 2 
physics
on a cool night with no wind, people facing a campfire feel a breeze on their backs explain 
Physics
Determine the tension in a 40 cm long pendulum when a bob of mass 200g moving at 0.7 m.s is 15 degrees from the vertical? 
Physics
someone in a car going past you at the speed of 31m/s drops a small rock from a height of 1.5m. 
Physics
What is the mass of a paratrooper who experiences an air resistance of 400 N and an acceleration of 4.5 m/s2 during a parachute jump. 
physics
state the surface powers required to produce the following lenses with +6.25D front curves. a. 0.50 DS 6. +0.50 DS c. +1.75 DS 
Physics
Find the energy stored in the solid flywheel of mass 8.0×104 and radius 1.8 when it's rotating at 290 
physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. 0.50 DS b. +0.50 DS c. +1.75 DS 
physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. 0.50 DS b. +0.50 DS c. +1.75 DS 
physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. 0.50 DS b. +0.50 DS c. +1.75 DS 
Physics
What is the image distance of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? 13.3 cm 13.3 cm 40.0 cm 40.0 cm 
Physics
What is the magnification of a 4 cm tall object placed 40 cm from a concave mirror having a focal length of 10 cm? 0.33 0.33 1.33 1.33 I'm thinking B. 
AP Physics
A 1200 kg car is moving at 33 m/s then has the brakes applied at a deceleration of 6.1 m/s. How far will it move before stopping? 
college physics
A cannonball shot at an angle of 60 Degrees had a range of 196m. What was its initial speed? 
Physics
What push parallel to a 42 incline is required to just start a 340 N block sliding up the plane? us = 0.6 
Physics
how much potential energy does Tim, with a mass of 62.0kg, gain when he climbs a gymnasium a distance of 3.8m? 
Physics
how much potential energy does Tim, with a mass of 62.0kg, gain when he climbs a gymnasium a distance of 3.8m? 
Physics Help!
Find the total kinetic energy content of 1.55 moles of an ideal gas at temperature 435 K 
physics
calculate the period of a ball tied to a string of length 1.9 m making 1.5 revolutions every second 
physics
calculate the period of a ball tied to a string of length 1.9 m making 1.5 revolutions every second 
physics
find the change n momentum of a 1120kg car that increases its speed / what minimum force is need to do this? 
Physics
Steam of mass 11.0 g at 100°C is added to 114.8 g of ice at 0.00°C. Find the final temperature of the system. 
Physics
A long jumper leaves the ground at an angle of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump? 
physics
A standing wave has a wavenumber 200 rad/m. What is the distance between two adjacent nodes? 
physics
you are to determine the amount of sugar dissolved in solution. how can you use polaroid filters to complete the task? 
physics
Which consumes more energy, a 1.5 kW hair dryer used for 10 min or a 10 W night light left on for 19 hr? 
Physics
When an inflated baloon is been put in the freezer for 15 minutes, which of the ideal gas law is the observation 
physics
3 points particles with masses 4kg,2kg,3kg are at the corners of equilateral triangle of side m =2m. 
PHYSICS DUE SOON
A 95.1g ice cube is initially at 0.0°C. (b) What is the change in entropy of the environment in this process? ___________J/kg 
PHYSICS HELP
1 1200kg car is accelerating at 1.6m/s/s. If the coefficient of friction is .15, what is the force supplied by the engine? please help! urgent! 
physics
A block of mass 25.5 kg is released on a ramp with an angle of 31.70 degrees. The coefficient of friction is 0.45. Find the acceleration. 
physics
show that none of the principal moments of inertia can exceed the sum of the other two Please help me thank you 
physics
A 1.56kg seagull dives through the air and gains 4495 of energy.What is the birds speed? 
Physics
a child twirls a yoyo about in a horizontal circle. The yoyo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yoyo? thanks! 
physics
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car? 
physics
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car? 
physics
How much work is needed to lift a 400kg engine upward 1.5 meters out of a car? 
physics
An Otto engine has a maximum efficiency of 33.1 %; find the compression ratio. Assume that the gas is diatomic. 
Physics
What is the frictional force between the tires of a 2000 kg car and an asphalt road if the coefficient of friction is 1.2? 
Physics
What is the frictional force between the tires of a 2000 kg car and an asphalt road if the coefficient of friction is 1.2? 
PHYSICS
Find the electrical force that exist between two particles having 6.0 mC and 18 nC when they are 0.5cm apart 
physics
How much potential energy does DeAnna with a mass 57.0 kg, gain when he climbs a gymnasium rope a distance of 3.7 m? 
Physics
An object was fired with an initial speed of 33m/s at an angle of 32 degrees from the horizontal. How long was it in the air? 
Physics
The crate, m=68kg, is pushed up an incline, θ=24degrees, at a constant velocity with Fp=500N. μk=? 
science
How can I find the physics behind why a wheel moves faster or slower than other wheels? Is this friction? 
Gr 9 Science  physics
If all 3 resistors in a series 12V circuit are the same, what will the voltage be across resistor no. 3? 
physics
A helicopter blade spins at 110 revolutions per minute. Its tip is 5.50 m from the center of rotation. 
Physics
How far above the surface of the earth would you have to be before your weight is reduced by 12.89%? Please Help ! 
Physics
If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point? 
Physics
If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point? 
Physics
If a bullet was fired straight up at a speed of 30 m/s, what would be the total time for it to return to its starting point? 
Physics
If a bullet was fired straight up at a speed of 30 m/s what would be the total time for it to return to its starting point?