Physics!
74,459 results, page 100

physics
Why we use square root of density in Grahms law instead of simpl density? 
physics
an airplane rolls down the runaway. compared to which reference point is the airplane in motion? 
physics
Forces of 8.85 N and 2.21 N act at right angles on a stack. What is the mass of the stack if it accelerates at a rate of 4.4 m/s^2? 
Physics
A circular ring of radius 10 cm has a continuous charge distribution of 4C/m . How many total electrons are on the ring? 
Physics
Use the equation for acceleration to determine the acceleration for the following motion. Time(s) 0 1 2 3 4 Velocity(m/s) 0 2 4 6 8 
physics
n object is dropped from rest. What is the acceleration after 6 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/ 
physics
An electron floats at rest above a sheet of charge with uniform charge density x. What is x in C/m^2 
physics
If my kinetic coefficient and static coefficient are both 1.02, how can I explain why they are the same???? (For a horizontal surface) 
Physics
At 1:00 p.m. a car, traveling at a constant velocity of 80 km/h toward the west, is 31 km to the west of our school. 
Physics
A 0.40 g fruit in a tree has a gravitational potential energy of 200 J. How high from the ground is the fruit? 
physics
A 2.0 kg rock is dropped from the top of a building. I lands 14.0 seconds later. How tall was the building? 
Physics 221
What is the magnitude and direction of the electric field at a point 0.75 m away from a point charge of +2.0 pC? 
physics
two forces 5N and 7N act on an object respectively.When will the resultant of the two vectors be at a maximum? 
Physics
What affect does changing the mass of an object on a ramp have on the efficiency of the ramp? Explain. 
physics
A man walks 10km due south. The displacement of the man from the initial position is 
Physics
A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water? 
Physics
A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water? 
Physics
A car experiences a constant acceleration of 2.3 m/s2. How long does it take (in s) for the car's speed to increase from 6.6 m/s to 17.9 m/s? 
Physics
On an unknown planet, a pendulum of length 1.5 m swings with a period of 3.3 s. What is the acceleration of gravity on this planet? 
physics
he xcomponent of a velocity vector that has an angle of 44∘ to the +xaxis has a magnitude of 4.3m/s . What is the magnetude velocity? 
Physics
A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return. 
Physics
A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return. 
Physics 2
An antenna is connected to a car battery. Will the antenna emit electromagnetic radiation? Why or why not? Explain 
physics
The charge carried by one electron is e = 1.6 × 1019 C. The number of electrons necessary to produce a charge of 1.0 C is: 
physics
A coin is dropped from a height of 40 meters. How fast is the coin traveling after 3 seconds? 
physics
what is the magnetic flux of a magnetic field of 3.5 x 10 T lassing a given circular surface with radius 30 cm 
physics
a ball is dropped from the top on an 80m high building. what speed does the ball have in falling 3.5 s? 
Physics
What element results if two protons and two neutrons are ejected from a radium nucleus? 
Physics
what will be the final temp of 500g of 21c waterbullets are dropped in? when 500g of 324c lead 
physics
When heat transfers into a system, is the energy stored as heat? Explain briefly. 
physics
In a typical electron microscope, the momentum of each electron is about 1.4 1022 kgm/s. What is the de Broglie wavelength of the electrons? 
Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun. 
Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun. 
Physics
A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun. 
physics
A steel sphere of radius 6.5 mm is dropped into a lake. What is the terminal speed of the sphere? 
Physics
A steel sphere of radius 6.5 mm is dropped into a lake. What is the terminal speed of the sphere? 
physics
A steel sphere of radius 6.5 mm is dropped into a lake. What is the terminal speed of the sphere? 
PHYSICS PLEASE HELP QUICKLY
Multiple choice please help :) Which of the following is equivalent to one ampere? 10 s/10 C 10 C/10 m 1.5 C/1.5 s 15 C/10 s 
Physics
What is the centre of mass if the mass of the earth is 81 times that of the moon and the distance between them is 384 Mm=60 rj ? 
physics
A car with a mass of 2,000 kg has a kinetic energy of 900,000 J. How fast is it traveling? 
physics
An astronaut on Triton throws a 0.142 kg baseball straight up with a velocity of 24 m/s. How high does the baseball go? 
Physics
3) What is the emf of a battery with an internal resistance of 0.15 if the battery delivers 1.5 A to an externally connected 5.0 resistors? 
Physics
why does the temperature of boiling water remain the same as long as the heating and boiling continue? 
Physics 2
State Lenz’s law and explain Briefly explain the operation of an electric generator 
physics
A snail moved 0.14 m between two cabbages in 3.0 minutes. The average speed of the snail is 
physics
how many litres of 15%(mass/volume)sugar solution would it take to get 75g of sugar? 
Sociology
Which of the following was a topic of study in early sociology? a. Astrology b. Economics c. Physics d. History 
Physics
A car slows from 23 m/s to 3.4 m/s at a constant rate of 2.1 m/s2. How many seconds are required before the car is traveling at 3.4 m/s? 
physics
The position of a particle as it moves along the x axis is given by x = 15eƒ{2t m, where t is in s. What is the acceleration of the particle at t = 1.0 s? 4. 
physics
A certain circuit breaker trips when the rms current is 50.0 A. What is the corresponding peak current? 
Physics
An electron has an initial speed of 2.24 × 10^5 m/s. If it undergoes an acceleration of 2.2 × 10^14 m/s^2, how long will it take to reach a speed of 5.37 × 10^5 m/s 
physics
The resistivity of copper is 1.3×10^9 ohms. What is the length of a wire whose resistance is 0.25 ohms, diameter 10^8 m. 
physics
If a ball hits a wall going 10 m/s, and bounces off going 7 m/s. What is the coefficient of restitution? 
Physics
Two light bulbs of resistance R1 and R2 (>R1) are connected in a series. Which is brighter? What if they are connected in parallel? 
physics
In 10 seconds a car accelerates 3m/s^2 to 90m/s. How fast was the car going before it accelerated? 
physics
Forces of 8.85 N and 2.21 N act at right angles on a stack. What is the mass of the stack if it accelerates at a rate of 4.4 m/s^2? 
physics
A bicycle tire rotates at 30 radians/s. If the bicyclist travels at 10m/s, what is the diameter of the tire? 
physics
a net force of 72 n is applied to a 48 kg box starting from rest for 8 s. what is the final velocity of the box? 
Physics
Does potential energy equal to kinetic energy within the limits of experimental error? 
Physics
The initial speed of a body is 3.01 m/s. What is its speed after 3.89 s if it accelerates uniformly at 3.63 m/s 2 ? Answer in units of m/s 
physics
a 0.12 kg is sitting on a record with a diameter of 0.30 meters. the record completes one turn on 0.40 seconds 
physics
a 0.12 kg is sitting on a record with a diameter of 0.30 meters. the record completes one turn on 0.40 seconds 
Physics
What is the horizontal component of the force of an object sloped at a 45° angle. pulling with a force of 110N. 
physics
Calculate the potential energy of a 9.00 g bullet traveling 4.00 m above the ground at 50.0 m/s with respect to the ground 
physics
The initial speed of a body is 6.64 m/s. What is its speed after 1.38 s if it accelerates uniformly at 4.7 m/s 2 ? Answer in units of m/s 
physics
a force of 10n cause a spring to extened by 20 mm find? the extension of the spring when 25n is applied 
physics
if the radius from the discus to the axis of rotation is 1.4m, what is the linear velocity of the discus at the time of release? 
Physics~
The moon's gravity is onesixth that of the earth. What is the period of a 0.25 m long pendulum on the moon? 
physics
5000J of heat is supplied to 10kg of water at 30degrees. What will be the water's final temperature 
Physics
Why do citizens have a responsibility to have some basic understanding of nature's rules? 
mathematics,science,physics,agriculture and geograph.
which work i surpose to do?caus geograph confuse me! 
physics
the brakes of a car provide an acceleration of 5.0 m/s^2 . how long will it take for a car traveling at 20.0 m/s to stop ? 
physics
Suppose that you balance a 5 kg ball on the tip of your finger that has an area of 1 cm2. What is the pressure on your finger? 
physics
A canoe has a velocity of 0.31m/s southeast relative to the earth. The canoe is on a river that is flowing 
Physics
Two forces of 5N and 7N respectively act on an object,When will the resultand of the two vectors be at max? 
physics
A 200kg rock is being pulled upward with an acceleration of 3 m/s2. The net force on the rock is 
physics
A 2011 kg elevator moves with an upward acceleration of 1.9 m/s2. What is the tension in the cable that supports the elevator? 
physics
what is the electric force exerted on a test charge of 3.86 x 10^5 C if it is placed in an electric field of magnitude 1.75 x 10^4 N/C ? 
physics
What average force is required to stop a 920kg car in 7.7s if the car is traveling at 83km/h ? 
physics
a pendulum is 0.75 meters long and has a period of 4.17seconds is this pendulum on the earth moon or mars? 
Physics
A car that slows down uniformly from 20 m/s to 5 m/s has an impulse of 30,000 kg m/s. Determine the mass of the car 
Physics
Carl hits a 0.05 kg golf ball giving it a speed of 65 m/s. What impulse does he impact to the ball? 
physics
At what force would a 16k object travelling at 25mph hit a stationery object 
Physics
Carl hits a 0.05 kg golf ball giving it a speed of 65 m/s. What impulse does he impact to the ball? 
Physics
A 65 kg sprinter completes a 100 m race in 9.83 s. Calculate the average kinetic energy of the sprinter. 
Physics
an object falls from a 3m height what is the speed of the object just before it touches the ground? 
Physics
What is the focal length of a lens that has a center of curvature of 18 meters from one of the curves of the lens? 
PHYSICS
Find the mass of water that vaporizes when 4.04 kg of mercury at 210 °C is added to 0.498 kg of water at 81.6 °C. 
PHYSICS
Find the mass of water that vaporizes when 4.04 kg of mercury at 210 °C is added to 0.498 kg of water at 81.6 °C. 
Physics
Vectors A and B are added to produce C, that is A+B=C. If B=5x+5y and C=2x3y. Find the unit vector of A, that is find A (in component form). 
physics
a man goes 10m towards north,then 20m towards east then displacement is what 
physics
what acceleration is imported to a football when the player kicked it with a force of 25 N mass of football 0.40kg 
Physics
if the distance and height of a track increase, does the car's accepted velocity and acceleration increase? 
experiment physics
experiment vector and addition. is it necessary to label the first load ? explain 
Physics
A 100 kg load is lowered by means of a cable with a downward acceleration of 5.0 m/s^2. What is the tension in the cable? 
Physics
Leila walks south for 20m and then west for 20m. What is her resultant displacement graphically? 
Physics
A body falls freely from rest for a 6sec find the distance traveled in the last 6sec. 
Physics
A ball is dropped from rest and takes 0.43 s to fall to the floor. At what height was the ball released? 
physics
When a car moves up an incline, does the kinetic energy and potential energy decrease or increase? 
Physics
A ball is tossed straight up into the air with a velocity of 37 m/s. What is its velocity at the top of its flight?