Physics!
74,459 results, page 45

Physics
Describe the acceleration time graph of a car traveling forward and applying its brakes. 
Physics
How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed? 
physics
A 1300 kg sports car accelerates from rest to 90 km/h in 7.0 s. What is the average power delivered by the engine? 
PHYSICS
A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5s time interval. What is its average acceleration? 
Physics
At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^1. At what depth does the euphotic zone end? 
Physics
What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical? 
physics
How much energy is produced when the sun converts one kg of hydrogen into helium? 
SCIENCE
Didn't mean to ask but i was really curious and didn't get an answer from researching.Why is physics necessary in becoming a dentist? 
physics
Good job "Drwls", your answer to my bowling ball question worked. Way to go! 
physics
What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz 
Physics
A positive and a negative charge, each of magnitude 1.0 105 C, are separated by a distance of 12 cm. Find the force on each of the particles 
Physics/ optics
An object is located 25cm in front of a +6.00 lens, where is the image? is it real or virtual? 
Physics
In a hydrogen atom, if the radius of the orbit of the electron is doubled, then its energy will ... >> Increase by a factor of 2?? 
physics
pls what is the formula for calculating period given gravity, mass and length of the material 
Physics
What is the difference in blood pressure between the head and feet of a person of height 171 cm? 
PHYSICS
If the current in a 100 mH coil changes steadily from 25.0 A to 10.0 A in 375 ms, what is the magnitude of the induced emf? 
PHYSICS
What is the inductance L of a 0.40 m long airfilled coil 3.2 cm in diameter containing 10,000 loops? 
physics
what is the most important element for creating a magnetic field. and why? Moving charges..... right? 
physics
do all electrons ejected from a metal surface have the same kinetic energy? 
physics
How much work must be done to increase the speed of an electron from 0.200c to 0.210c? In (MeV) 
Physics
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC? 
physics
if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o 
Physics
What is the strength of the magnetic field a distance of 1 meter from a wire carrying a current of 1 A? B=MoI  2(pi)r Mo=4(pi)x 10^7 I=1 A How do I know what r is? 
physics
Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :) 
physics
Suppose a rock fell off a cliff. After 5 seconds, its speed well be 100 m/s 
Physics
What is the centripetal acceleration of a skater moving with a tangential speed of 2.0 m/s in a circular path with radius 2.0 m? 
physics
A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg? 
Physics
If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees? 
Physics
If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees? 
physics
An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 15.0 s. What distance does the car travel? 
Physics
a runner moving at a speed of 5.60 m/s rounds a curved track with a 60.0 m radius. what is the runners acceleration? 
physics
A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume 
Physics
While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating? 
physics
please shelp me with this problem what is the stopping potential (V) if the wavelength of the incident light is 400 nm?? 
Physics
if you push a wall with a force of 50N, the work you do is...... (a)500J (b)5000J (c)50J (d)zero 
physics
how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J? 
physics
The space shuttle traves in orbit at 210000 km/hr. How far will it travel after 5.0 hrs? 
physics
if you jump upward with a speed of 2mls, how long will it take before you stop rising? 
College Physics
What is the work required to move a proton 1 cm along the 7 volt equipotential line? 
physics
In the ideal case of zero resistance, a ball rolling on a level surface will accelerate 
Physics
Absolute temperature is proportional to the average kinetic energy of the atoms. True or false? 
physics
A car travels in a straight line for 4.5 h at a constant speed of 61 km/h . What is its acceleration? Answer in units of m/s2. 
physics
By how much does the speed of a vehicle moving in a straight line change each second when it is accelerating at 4 m/s2? 
physics
8. Before you drop a ball held at a height of 5m with a weight of 20 N, what is its gravitational potential energy 
physics
Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples. 
physics
what is the speed of a ball after it has fallen freely from rest through a distance of 12 meters 
physics
a 10kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ? 
physics
If a spring has a constant of 20N/m how much potential energy does it store if it is compressed 2m in joules? <3 
physics
What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s? 
physics
4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30 
physics
4. What force is needed to push a 15 N object up a 20° incline at constant speed when the coefficient of friction is 0.30? 
Physics
Calculate the tangential speed of the earth around the sun (assuming a circular orbit). 
Physics
A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine? 
Physics
a circuit contains a 9v battery and two 1 ohm bulbs. what is the voltage drop across each. 
physics
What is the quantum particle of the electric field? Answer a. The proton. b. The electron. c. The photon. d. The neutron. 
Physics
A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine? 
physics
does each of the two lenses used in a microscope produce a magnification of the object being viewed? 
physics
calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour 
Life...
Do i need to take precal and physics in highschool to become a nurse, dentist, or doctor? 
physics
why does the filament of a bulb does not melt though it heats more than 3400 degree celcius 
physics
 A rugby player of mass 82kg is running at 6.0m/s. How much energy will be needed to stop him?  
Physics
.17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction? 
physics
A rotating cylinder about 16 long and 6.2 in diameter what angular speed must it rotate? 
physics
A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water. True or False 
PHYSICS
Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet. 
physics
at time t=0 the driver starts to brae determine how long the bus takes to stop 
Physics
Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet. 
Physics
What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east? 
physics
which object will have higher inertia a rock of 20kg or a hollow ball of 22kg 
physics
A yoyo of radius 10 cm and mass 1 kg is dropped from rest. What is the instantaneous torque on the yoyo if I hold the string with my fingers? 
physics
i have two kinetic energies and my homework asks for the ratio, K2/K1 Do i just divide them? 
Physics, PLEASE HELP!!
A long jumper jumps with the initial velocity of 12.0 m/s at an angle of 20 degrees. what is the displacement of x? 
physics
YOU PUSH A REFRIGERATOR WIT HA FORCE OF 50N AND IT MOVES 3 METERS ACROSS THE FLOOR 
physics
A force of 3000 N is applied to a 1500kg car at rest. (a) what is its acceleration? (b) what will its velocity be 5 s later? 
physics
How would the use of dark matter affect the earth and universe? Explain possiblities 
physics
A ball is thrown vertically upward with a speed of 27.6 m/s. How high does it rise? Answer in units of m. 
Physics
As the temperature of an object becomes higher, what happens to the average wavelength of the radiation it emits? 
Physics
does a baseball thrown at 100 miles per hour have a lot of force? 
physics
find the force of a toy jeep if the mass is 50kg and is traveling at 4 m/s and the radius is 50 centimeter 
physics
what force is acting on a circular platform rotating opposite of a person standing on the edge? 
physics
a ball moves with a constant speed of 4 m/s around a circle of radius 0.25 m. what is the period of the motion? 
physics
A projectile is launched straight upwards at 45 m/s. Three seconds later, its velocity is A. 75 m/s B. 30 m/s C. 15 m/s D. zero 
physics
How high must a 2.0kg basketball be thrown so that the top of its arc, it has a potential energy of 160 J? 
PHYSICS!!!
By how many decibels does the sound intensity from a point source decrease if you increase the distance to it by a factor 6? 
physics
how much work is being done if a 100 N box is lifted 3 meters off the ground??? 
Physics
If a clock says 10:30 am and the second hand rotates 960 degrees what time would it be? 
physics
the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s. 
physics
Describe how the energy from a rotating flywheel can be transferred to moving parts of a child's toy. 
physics
explain examples of physical laws used during the Apollo 13 mission to get it home 
physics
a mass 3 kg is dropped from a 20m high stand how long does it take to reach the ground? 
physics
a mass 3 kg is dropped from a 20m high stand how long does it take to reach the ground? 
Physics
How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s? 
Physics
How much force is needed to make a 1,400 kg car moving at 35 m/s come to a stop in 5.2s? 
physics
How can I calculate exactly where a marble will drop if it is rolling of a table with very little friction?? 
physics
the frequency of yellow lights is 5.00 x 10^14 Hz. if it travels through space (where v= 3.00 x 10^8m/s) find the wavelength of this light. 
physics
if a man weighing 80 kg falls from 20000 feet , what would be his weght when he hits the ground? 
physics
a 150giron ball at 95 Celsius is dropped into a cavity in a block of ice 
Physics 112
Two point charges, +3.18 µC and 6.40 µC, are separated by 1.32 m. What is the electric potential midway between them? 
science (physics)
thank you for your help! my question is :how do you find the magnitude of the electric field that will balance the weight of an electron? 
physics
A 7.9 kg object undergoes an acceleration of 2 m/s2. What is the magnitude of the resultant force acting on it? Answer in units of N.