13. A photon has energy 3.98times 10^-19J What is its wavelength.?

Simulation 5: Lightning Open the two Lightning Animations in your PPT. Use the simulation in Static Electricity PPT 1. What causes the clouds to become charged? 2. What charge does the base of the cloud accumulate? 3. What happens to the electrons in the ground after some buildup of charge in the base of the cloud occurs?

21. 2) Select the best answer. What did Greek philosophers Isaac Newton, and others commonly use to explain their observations? journals math hand gestures interpreters

Which of the following materials has the tendency to become negatively charged? Rubber Silk Glass Fur

8. Water flows with a volume flow rate of 1.50m^3/s in a pipe. Find the water speed where the pipe radius is 050 m.

5. You dive 5 .7 m below the surface of a pool.The water enters your ear and presses on your ear drum. The eardrum is a small membrane with diameter 8 mm (1000mm=1m) (a) Calculate the gauge pressure at this depth. (b) Calculate the absolute pressure at this depth. (c) Calculate the total force due to the water and the air above the pool acting on your eardrum. (Density of chlorinated water is 992kg/m^3)

A car traveling at 29m/s runs out of gas while traveling up a 5.4^circ slope. (a) How far will it coast before starting to roll back down?

7. A sample of radium has a weight of 1.5 mg and a half-life of approximately 6 years. a. How much of the sample will remain after 6 years? 3 years? 1 year? square After 6 years... After 3 years... b. Find a function f which models the amount of radium f(t) in mg, remaining after t years. f(t)=

An object's momentum depends on both its mass and its velocity. True False

9 Suppose an astronomer observes a star system oriented towards her as shown in the animation. The system itself has no motion along the line of sight from Earth. The light of the inner star as it orbits the center of mass is redshifted. does not change. is blueshifted. What method might be used to detect the existence of the outer planet in this system? direct detection diffraction method transit method radial velocity method

Hot Questions

11. ¿Qué es un campo gravitacional? A) Una región donde se experimenta una fuerza eléctrica. B) Una región donde se experimenta una fuerza magnética. C) Una región donde se experimenta una fuerza gravitacional D) Una región sin ninguna fuerza.

Which types of electromagnetic waves are slower than visible light? ultraviolet gamma rays radio waves microwaves

A series R-L-C circuit consists of a $100\Omega $ Resistor, a $75\Omega $ Inductive Reactance and a $150\Omega $ Capacitive Reactance. If we wish to maximize the circuit current how can we do this? Raise the frequency until $XL=Xc$ Lower the Frequency until $XL=Xc$ Can't be done Double the value of R

Ch 22 \# 8 Aircraft sometimes acquire small static charges. Suppose a supersonic jet has a $0.500\mu C$ charge and flies due west at a speed of $660m/s$ over the Earth's magnetic south pole (near Earth's geographic north pole)where the $8.00\times 10^{-5}T$ magnetic field points straight down. What are the direction and the magnitude of the magnetic force on the plane?

Air rises in low pressure areas and sinks in high pressure areas. True False

28. The fact that a laser pointer is red, is an example of which property of light? Polarization Intensity Frequency Brightness Direction

Which form of electromagnetic radiation carries the most energy? X-rays Infrared Radio waves Gamma rays Microwaves

An object in uniform circular motion has a __ acceleration. constant tangential linear centripetal

11. In Snell's Law the ratio of the indices is related to the inverse ratio of the __ of the angles. square cosine tangent natural log sine

This path increment for an apple corresponds to negative work done by gravity: $\Delta y=+0.25m$ $\Delta y=-0.25m$ $\Delta y=0.00m$