Neutron diffraction is used in determining the structures of molecules. a. Calculate the de Broglie wavelength of a neutron moving at 3.80% of the speed of light. Wavelength=square m b. Calculate the velocity of a neutron with a wavelength of 57 pm (1pm=10^-12m) Velocity=square m/s

Biomechanics is mechanical movement True False

A heavy stone and a light stone are released from rest in such a way that they both have the same amount of gravitational potential energy just as they are released. Air resistance is negligibly small Which of the following statements about these stones are correct? (There could be more than one correct choice.) a) The stones must have been released from the same height. b) Just as it reaches the ground, the light stone is traveling faster than the heavy stone. c) The initial height of the light stone is greater than the initial height of the heavy stone. d) The stones both have the same speed just as they reach the ground. e) The stones both have the same kinetic energy just as they reach the ground.

33. What does a transformer do? 34. Write the transformer equation relating voltage and number of turns. 35. A transformer has 200 turns in the primary coil and 20 in the secondary coil If the input voltage is 2400 V.what is the output voltage? 36. Why is voltage stepped up for power transmission over long distances?

A projectile travels 1,120 feet per second. How fast is the projectile traveling in miles per hour? The projectile travels square miles per hour. (Type an integer or decimal rounded to the nearest tenth as needed )

Calculate the force on a 160m wire carrying 150A of current if a magnetic field of 5times 10^-5 T makes a 165^circ angle with the wire. square N

Two iron bars attract each other no matter which ends are placed together. Are they both magnets? Explain. square

Absolute vorticity is a combination of curvature and shear vorticity. True False

The energy that is possessed by an object because of its motion or its position is called square energy.

How many significant figures are in this length? .002500 dm square

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?