what is the relationship between slit width d and delta x distance?

explain how Galileo's observations of the phases of Venus was the "nail in the coffin" for geocentrism identifying what he observed to support his claims.

A photon moving in the +x-direction, scatters off a free stationary electron. The wavelength of the incident photon is 0.0330 nm. After the collision, the electron moves at an angle α below the +x-axis, while the photon moves at an angle θ = 73.3° above the +x-axis. (For the purpose of this exercise, assume that the electron is traveling slow enough that the non-relativistic relationship between momentum and velocity can be used.)

(a)

What is the angle α (in degrees)?

° counterclockwise from the +x-axis

(b)

Determine the speed of the electron (in m/s).

m/s

Two racing boats set out from the same dock and speed away at the same constant speed of 103 km/h for half an hour (0.500 h), the blue boat headed 26.8

Give examples of changes of energy from potential to kinetic and from kinetic to potential.

A permanent magnet is held directly below the center of a coil which is connected to a voltmeter. As you move the magnet closer towards the coil, the voltmeter reads negative. Which of the following statements is always true?

Moving the magnet farther away from the coil would produce a positive voltage reading instead.

Moving the magnet farther away from the coil would also produce a negative voltage reading.

The closer to the coil the magnet is held in place, the higher the magnitude of the voltage.

Turning the magnet clockwise about an axis perpendicular to the paper (such that "North" would increasingly point right) would produce a negative voltage readout.

Twisting the magnet clockwise about its long axis would produce a positive voltage readout.

Moving the magnet to the right would produce a negative voltage readout.

If you had turned the magnet around so that "South" would be on top, then moving it closer towards the coil would still produce a negative voltage readout.

The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net . Suppose that you loft the ball with an initial speed of 15.0 m/s at an angle of 50.0° the horizontal. At this instant your opponent is 10.0 m away from the ball. He begins moving away from you 0.21 s later, hoping to reach the ball and hit it back at the moment that it is 2.10 m above its launch point. With what minimum average speed must he move? (Ignore the fact that he can stretch, so that his racket can reach the ball before he does.)

A ball was tossed from a height of 1.20 m, initial velocity of 13.0 m/s at an angle 26.0° above the horizontal. The ball hits the ground at a horizontal distance of 20.0 m from the launch point. Use 10.0 N/kg for g.

a) Find in m/s the magnitude of the velocity of the ball when it is at the top most position of its trajectory

b) Find in m/s² the magnitude of the acceleration of the ball when it is at the top most position of its trajectory.

c) How long in seconds is the ball in flight?

d) What is in m/s the magnitude of the velocity with which the ball hits the ground?

e) What is in m the highest point relative to ground reached by the ball?

According to the Guinness Book of World Records,the longest home run ever measured was hit by Roy

3)

A car turning in a circle is acceleratring in the centripetal direction, even if the speed is constant. This centripetal acceleration is the cause of a radially inward directed net force. On a level road this net force is the friction force acting from the road on the tires. You already looked at examples for this.

On racetracks and also highway turns the reliance on friction can be reduced by "banking" the road. This also reduces the risk of the vehicle to roll over. The picture shows two cars and a bus in an extremely banked turn at the Mercedes test track.

Draw a free-body diagram for a car in a banked curve. Then find an expression for the speed at which a car can negotiate the turn without any friction in the radial direction (f=0).

Calculate that speed (in mph) for a 47 m radius turn that is banked by 5 degrees.

4)

You just should have already derived an expression for the "frictionless" speed of a car in a banked turn. Now assume that the coefficient of friction is u_s. Find an expression for the maximum speed at which a car can drive through a turn with radius R and banking angle theta.

Evaluate your answer: test whether in the two limiting cases of "no friction" and "level road" your answer will turn into the two results you already have derived for these cases.

Below answer with the maximum speed (in mph) for a turn with radius 126 m, banking angle 10 degree, and coefficient of static friction 0.71.

Please help I have tried so many times I'm almost out of tries!

Steam can cause more serious burns than water at the same temperature. Here we examine this effect quantitatively, noting that flesh becomes badly damaged when its temperature reaches 50.0

A 720-kg two-stage rocket is traveling at a speed of 6.90×10^3 m/s away from Earth when a predesigned explosion separates the rocket into two sections of equal mass that then move with a speed of 2.10×10^3 m/s relative to each other along the original line of motion.What is the speed of each section (relative to Earth) after the explosion? R/= v1=5850, v2=7950. How much energy was supplied by the explosion? [Hint: What is the change in kinetic energy as a result of the explosion?] R/= 3.97*10^8 J. Could somebody help me to know why the answer to C is 3.9*10^8J?

he K series of the discrete x-ray spectrum of tungsten contains wavelengths of 0.018 5 nm, 0.020 9 nm, and 0.021 5 nm. The K-shell ionization energy is 69.5 keV. (a) Determine the ionization energies of the L, M, and N shells.

Explain how sound is actually a form of energy. In what medium do sound waves travel? 1-2 paragraphs

A very long uniform line of charge has charge per unit length 4.74?C/m and lies along the x-axis. A second long uniform line of charge has charge per unit length -2.46?C/m and is parallel to the x-axis at y1 = 0.404m .

What is the magnitude of the net electric field at point y2 = 0.218m on the y-axis?

What is the direction of the net electric field at point y2 = 0.218m on the y-axis?

What is the magnitude of the net electric field at point y3 = 0.620m on the y-axis?

What is the direction of the net electric field at point y3 = 0.620m on the y-axis?