A symmetrical table of height 0.780 m, length 1.30 m, and weight 431 N is dragged across the floor by a force applied to its front edge. The force is directed to the right and upward and makes an angle of 30.0° with the horizontal.

A 28.0 kg beam is attached to a wall with a hinge while its far end is supported by a cable such that the beam is horizontal. If the angle between the beam and the cable is θ = 57.0° what is the vertical component of the force exerted by the hinge on the beam?

Calculate the energies and wavelengths of the three lowest radiations emitted by H2?

What is the maximum torque on a molecule of HCl (dipole moment p = 3.60

A 24 kg mass is connected to a nail on a frictionless table by a massless string 1.1 m long. There is no appreciable friction between the nail and the string. If the tension in the string is 54 N while the mass moves in a uniform circle on the table, how long does it take for the mass to make one complete revolution? (Give answer to the nearest 0.1 s)

A runner jogs for 150 m due west (displacement A) and then turns to a direction 30.0 degrees east of south and jogs for another 100 m (displacement B). Showing all work and units, and putting boxes around your answers, calculate

(a) the total distance between her initial and final positions. (Answer: 132 m)

(b) the direction of her net displacement C as an angle θC south of west. (Answer: 41°)

I am not really sure how to start this. Could someone please help with a STEP BY STEP explanation? I know you need to find the x and y components of A and B and then square both of those and take the square root to find C, but how would I go about doing that?

One ring to rule them all. N identical beads (mass m) can move along the ring of radius R. Each bead is connected
to the one behind it and to the one in front of it by a spring of constant k. Find all normal
frequencies.

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 10.2 m/s. The student throws a ball along a path that she judges to make an initial angle of 54.5� with the horizontal and to be in line with the track. The student's professor, who is standing on the ground nearby, observes the ball to rise vertically. How high does the ball rise? (Neglect air resistance.)

A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 342N.

(a) Find the child's speed at the lowest point.
m/s

(b) Find the force exerted by the seat on the child at the lowest point. (Ignore the mass of the seat.)
N (upward)

Please show Each Formula and Each Step used to obtain the answer(s).

A hydrogen atom consists of a single proton and a single electron separated on the average by 0.578 x 10^-10 meters. Calculate the acceleration of the electron due to the force. Write answer(s) to two decimal places and in the form of (1.6E-19) if applicable/where needed.

An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 133km/h .

Precisely 1.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.50m/s2 , how much time passes after the police car is passed by a speeder and before the police car overtakes the speeder (assumed moving at constant speed)?

I see demonstrations of single slit diffraction associated with the uncertainty principle. Is single slit diffraction a result of uncertainty, or is this just a demonstration to help understand uncertainty?

1. describe what is needed to form longitudinal standing waves in a slinky and how they are formed.

2. what is the difference between a longitudinal wave and a standing longitudinal wave. how are standing waves formed?

3. explain how sound waves are propagated through air. are these longitudinal or transverse waves?

4. describe the motion of individual air molecules at a node and at an antinode. compare this to the motion of the individual spring coils at nodes and antinodes when a standing wave is produced in a slinky.

5. what is the effect of changing the frequency of the sound? does it change the velocity of the wave? does it change the wavelength?

6. describe the motion of the individual air molecules at a node and at an antinode. compare this to the motion of the individual spring coils at nodes and antinodes when a standing wave is produced in a slinky.

7. what is the effect of changing the frequency of sound. does it change the velocity of the wave? does it change the wavelength?

8. a person who has just inhaled helium gas speaks with a high pitched voice. discuess why this happens given that your larynx and other parts of you respiratory passage act rather like a resonance tube with you vocal chords producing the necessary energy to vibrate the air.

Determine whether each of the statements below is true or false, and place it in the appropriate bin.

Which statements below are True and which are False:

1. It is possible to move at constant speed without moving at constant velocity

2.  It is possible to move at constant velocity without moving at constant speed

3. If you are given an objects speed you can definitely determine it's velocity

4. Two objects traveling the same velocity must have the same speed

5. If you know the distance an object travels and the time it takes to do so you can determine the objects speed

6. Two objects traveling the same speed must have the same velocity