211,502 results, page 48
If you are viewing a hologram and you close one eye, will you still perceive depth? Explain.
lenses that always diverge light rays that strike them is that convex or concave? I am not sure.
Explain how the photoelectric effect is used to open automatic dooes when someone approaches.
Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N
In 1923, Robert Millikan won the Nobel Prize for discovering the mass of the .... electron?
The two quantities conserved in all nuclear equations are....... mass and number?
If the third harmonic of a standing wave in a vibrating string is 600 Hz, what is the fundamental frequency?
Does an object need a net force acing on it in order to move at constant velocity?
A student photographs a 18cm flower so it fills half of a 24mm slide. What is the magnification?
Two identical charges are 36 mm apart. The electrostatic force between them is 1.3 N. What is the size of each charge?
the speed of light is about 3.00 x 10^8 m/s. convert this figure to miles per hour
im not procrastinating i really don't understand it. im not asking for the answers im just asking for a little more help??
can anyone give me a site that "best explains" about Rotational motion/Angular. thanks a lot.. :)
can anyone give a site that have problems about pressure with solution.. urgently needed.. thanks :)
What is the evidence for the claim that iron exists in a relatively cool outer layer of the sun?
How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 1.99 106 m/s?
What force is needed to accelerate a 10 kilogram shopping cart 3 m/s^2 (squared)?
lIST THE PARTICLES THAT MAKE UP AN ATOM. wHAT ARE THEIR CHARGES? hOW ARE THEY ARANGED? wHAT IS THE APPROXIMATE AMU OF EACH PARTICLE?
List the particles that make up an atom. What are their charges? How are they arranged? wHat is the approximate amu of each particle?
An object experiences an impulse, moves and attains a momentum of 200 kg m/s. If its mass is 50 kg, what is its velocity?
Why can't you put your heels firmly against a wall and then bend over without falling?
What are some possible uses for gelled methanol and why was it never used as a fuel in transportation?
If 2.4 m3 of a gas initially at STP is compressed to 1.6 m3 and its temperature raised to 30oC, what is the final pressure?
If an 80kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?
What is the work required for a 1000kg truck to increase in speed from 30 m/s to 40m/s? Is the answer 350 kJ?
What Net Force is necessary to give a 2.0 kg mass initially at rest an acceleration of 5.0 m/s^2? Is the answer 10. N?
how much work can a 50.0kg wreckin ball traveling at 5.00m/s do when striking a building
How does mass affect the motion of objects falling freely under the influence of gravity?
How can you easily increase the magnetic field strength inside a current carrying coil?
What is the de Brogile wavelength of an electon that strikes the back of the face of a TV screen at 1/10 the speed of light?
A cube of ice weighing 18 grams sublimes into vapor. How many liters of gas will you get?
What does shifting the phase between the sources in a double slit experiment do to the interference pattern?
An object is thrown upwards with a speed of 14.0 m/s. How long does it take to reach its maximum height
Could someone tell me the formula for finding distance when time is given and the acceleration is constant?
What is the value of a if the object is moving with constant velocity? What does this equation reduce to in such a case?
The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
The acceleration of a certain rocket is given by ax=bt where b is positive constant, find the position and velocity at t=5.0s if Xo=0 and Vo=0 and b=3.0m/s^3?
Is it possible to calculate the torque acting on a rigid body without specifying the origin?
A 1100 kg sports car accelerates from 0m/s to 33m/s in 13s What is the average power of the engine?
A 4430-kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?
Runners in the 100-m dash use starting blocks. Explain what this device does. PLEASE HELP.
A 1.5 volt battery will increase the potential energy of ________________ coulombs of charge by 0.18 joules.
What happens when you walk across a carpet and receive a shock when you touch a metal object.
A particle at rest undergoes an acceleration of 2.1 m/s2 to the right and 5 m/s2 up. a) What is its speed after 7.9 s? Answer in units of m/s.
If a car is traveling westward with a constant velocity of 20 m/s, what is the net external force acting on it?
If the change in position Dx is related to velocity v (with units of m/s) in the equation Dx = Av, the constant A has which dimension? a. m/s^2 b. m c. s d. m^2 I chose b?
How can you easily increase the magnetic field strength inside a current-carrying coil?
How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
what is the kinetic energy in joules of a 1000 kg car travelling at 90km/h
What is the de Broglie wavelength of an electron that strikes the back of the face of a TV screen at 1/9 the speed of light?
Thanx DRWLS! Worked like a charm and I checked behind myself with the same formula!!!
Another one, sorry! =P This stuff is really confusing.. Why doesn't friction depend on surface area?
how many electrons must be removed from an electrically neutral silver dollar to give a charge of +2.8 uc
At what temperature is the rms speed of helium molecules half its value at STP (0 C}, 1.0 atm)?
if a block of wood dropped from a building has attained a velocity of 78 m/s how long has it been falling?
what is the mass of hydrogen peroixide, H2O2, in 350 grams ofa 20% by weight solution?
A mass of gas has a volume of 380 cm3 at a pressure of 560 mm Hg and a temperature of 7C. What is its bolume at s.t.p.?
how much energy is gain by an electron accelerated through a potential differenc of 30000v?
what is the index of refraction of a medium in which the speed of this radiation is 2.54X10^8 m/s? I don't even know where to start...
Determine the percent error in this approximate value. (There are 365.24 days in one year.)
What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 ?
What experiment can be used to prove that the value of gravity near the earths surface is constant ie. 9,8m.s
A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)
Describe the acceleration time graph of a car traveling forward and applying its brakes.
How does the conservation of mechanical energy explain why a planet in an elliptical orbit changes speed?
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?
A race car's velocity increases from 3.6 m/s to 32.4 m/s over a 5-s time interval. What is its average acceleration?
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?
What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical?
How much energy is produced when the sun converts one kg of hydrogen into helium?
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?
Good job "Drwls", your answer to my bowling ball question worked. Way to go!
What is the frequency of the microwaves in a microwave oven? The wavelength is 12 cm. I have to give the answer in GHz
A positive and a negative charge, each of magnitude 1.0 10-5 C, are separated by a distance of 12 cm. Find the force on each of the particles
An object is located 25cm in front of a +6.00 lens, where is the image? is it real or virtual?
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??
pls what is the formula for calculating period given gravity, mass and length of the material
What is the difference in blood pressure between the head and feet of a person of height 171 cm?
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?
What is the inductance L of a 0.40 m long air-filled coil 3.2 cm in diameter containing 10,000 loops?
what is the most important element for creating a magnetic field. and why? Moving charges..... right?
do all electrons ejected from a metal surface have the same kinetic energy?
How much work must be done to increase the speed of an electron from 0.200c to 0.210c? In (MeV)
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
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
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?
Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)
Suppose a rock fell off a cliff. After 5 seconds, its speed well be 100 m/s
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?
A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?
If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
If a tuning fork puts out a tone at 440 Hz, what is its wavelength in air at 25 degrees?
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?
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?
A plastic bobber just barely floats in water. If it weighs 2N in the air, what is its volume
While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?
please shelp me with this problem what is the stopping potential (V) if the wavelength of the incident light is 400 nm??
if you push a wall with a force of 50N, the work you do is...... (a)500J (b)5000J (c)50J (d)zero
how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?
The space shuttle traves in orbit at 210000 km/hr. How far will it travel after 5.0 hrs?