A heat engine absorbs 150 J of heat from a heat source. The heat engine does 50 J of work. How much heat flows to the heat sink? -100J 50J 100J 2 of 4

Suppose that the propagation velocity of Medium 2 is 1300m/sec and the propagation velocity of Medium 1 is 1200m/sec For an incident angle is 30^circ is the refracted angle toward or away from normal? A away from B toward C no refraction occurs

Whar are the essential points of Bohr's theory of the structure of the hydrogen atom? (Select all that apply.) The probability of finding the electron decreases at greater distances from nucleus. The electron could jump to a different orbit by absorbing or emitting a photon of light with exactly the correct energy content. Electrons are moving in circular orbits corresponding of the various allowed energy levels. An orbit represents a region of space in which there is a high probability of finding the electron. D As the energy levels of a given atom are indefinite, the atom should always emit energy with different wavelength.

Two objects attract each other gravitationally. If the distance between their centers doubles, the gravitational force quadruples. doubles. is a half. is a fourth. Clear my selection

How many (give the number) of the different types of media we are learning about in Lab 6 are classified as differential? Answer: square

It would take __ of years to get to other galaxies thousands billions trillions millions

Identify the kind of stars most hospitable to extraterrestrial life. Yellow stars Blue stars Red dwarf stars

Which experiences the greatest electrical force in an electric field? alpha particle electron beta particle gamma ray all the same

The probe end of the oscilloscope contains three conductors. True False

Calculate the extend speed of a cylinder,given the flow rate and piston diameter. R=4lpm D=3cm 501.24cm/min 565.77cm/min 610.37cm/min

Hot Questions

In the Atkinson and Shiffrin modal model information can be lost by both decay and interference at each stage. True False

Which object has the most inertia? ping pong ball feather bowling ball

8. What factor determines if lightning bolts are classified as hot or cold? A. lightning's temperature B. lightning's brightness C. likelihood of starting a fire D. amount of heat given off

4. What is the voltage drop across a shorted parallel component in a series-parallel circuit? A Zero volts B The applied voltage It depends on total current D It depends on total resistance

A stabilized spin is not different from a stall in any element other than Speed Rotation G force

A rock thrown vertically upward from the surface of the moon at a velocity of $16m/sec$ reaches a height of $s=16t-0.8t^{2}$ meters in t sec. a. Find the rock's velocity and acceleration at time t. b. How long does it take the rock to reach its highest point? c. How high does the rock go? d. How long does it take the rock to reach half its maximum height? e. How long is the rock aloft? a. Find the rock's velocity at time t. $v=16-1.6tm/s$ Find the rock's acceleration at time t. $a=\square m/s^{2}$ (Simplify your answer. Use integers or decimals for any numbers in the expression.)

A weightlifter lifts an 120-kg barbell at a height of 2.4 meters above the ground. If it took 2.8 seconds to complete this lift, what was the weightlifter's power output in watts? Round to the nearest integer. $\square $

What is the value of the normal force if the coefficient of kinetic friction is 0.22 and the kinetic frictional force is 40 newtons? A. 8.8 newtons B. 40 newtons C. 80 newtons D. $1.8\times 10^{2}$ 8 x 10 newtons

What type of evidence would a UV light be used to detect? DNA only Firearms residue Latent prints or bodily fluids Bullet trajectories

What model states that particles of matter are always in motion?