In your garden, you have a hose with a radius of 3 cm connected to a sprinkler with twelve openings, each of which has a radius of 0.2 cm. The sprinkler openings are aimed 25• above the horizon, and the water travels a distance of 4 m before hitting your flowers.

a) What is the exit velocity at the sprinkler openings?

b) What is the flow rate of the sprinkler?

c) What must the water pressure in the hose be?

(a) Explain the features of the spectra of alpha, beta and gamma radiation.

(b) Why does alpha/beta spectroscopy have to be conducted in an environment different from that for gamma spectroscopy?

How does a polarizing filter work? After passing through a polarizing filter that is aligned vertically, how are the electric and magnetic fields of the EM waves aligned? If you wished to block the light completely, how would you align a second polarizing filter that was placed directly behind the first?

what is the one way light time from moon to earth, calculate with general relativity effect.

Please explain each step.

Two point charges totaling 9.50 μC exert a repulsive force of 0.160 N on one another when separated by 0.420 m. a) What is the charge on each? Assume that the two charges are negative. b)What is the charge on each if the force is attractive?

If an object of mass m1 = 0.55 kg is sliding without friction in the +x-direction on a level surface at a speed of v1 = 0.72 m/s and it collides with a stationary object of mass m1 = 0.55 kg, determine the total initial and final momenta (before and after the collision) as well as the total initial and final Mechanical Energy (before and after the collision) for;

1) a perfectly elastic collision, and

2) a perfectly inelastic collision

Energy losses during an energy transformation process can be quantified as the efficiency;

e=useful energy out total energy in x 100%

3) State what the useful energies in and out are and then calculate the efficiency for the perfectly elastic and the efficiency for the perfectly inelastic collisions described above.

A) Three identical very dense masses of 5000kg each are placed on the x axis. One mass is at x1 = -130cm , one is at the origin, and one is at x2 = 400 cm.

1) What is the magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses? Take the gravitational constant to be G = 6.67×10⁻¹¹ N⋅m2/kg2N. Express your answer in newtons to three significant figures.

2) What is the direction of the net gravitational force on the mass at the origin due to the other two masses?

B) The space shuttle releases a satellite into a circular orbit 545km above the Earth.

1) How fast must the shuttle be moving (relative to Earth) when the release occurs?

point charge +Q at origin and two infinite ground planes at z= +- d. used method of images to find

a)electric potential in region |z| =< d

b)induced surface charge density on the plates

• Using the part 1 data from your physics lab above calculate the following; calculated angle, observed angle and percent difference (show all work outside the table)
• For parts 1, 2, 3, and 4., use L and y to calculate the observed angle. Excel works in radian mode. You can force it into degree mode by using: sin(radians(B4)) or degrees(asin(C4/D4)) where B4 is your angle in degrees and C4 and D4 would be distance measurements.
• For parts 1, 2, and 3, use the wavelength, order number, etc., to calculate the expected angle.
• For parts 1, 2, and 3, calculate the percent difference between the observed and expected angle.

Why do the voltage and current in the pickup coil cycle between negative and positive? Explain in detail using Faraday’s Law. Remember, Lenz’s Law is part of Faraday’s Law! Although it will not be covered explicitly in this class, this is known as alternating current. Points to discuss: How the magnetic flux through the loop changes as the magnet rotates. Is the flux maximal when the magnet is horizontal or vertical on the screen? Why?) How this changing magnetic flux works to create an emf (potential difference) in the coil which alternates over time (use the Faraday’s law equation)

A 3 m^3 rigid tank contains 10 kg of H2O at 70 C.

a. Determine the specific volume of the system

b. Determine the pressure

c. The phase description and quality (x) if it is in the two phase region (saturated mixture)

d. The mass of each phase of water

e. The specific internal energy (u) of the system

A small rock with mass 0.30 kg k g is released from rest at point A A , which is at the top edge of a large, hemispherical bowl with radius R R = 0.48 m m (the figure (Figure 1)). Assume that the size of the rock is small compared to R R , so that the rock can be treated as a particle, and assume that the rock slides rather than rolls. The work done by friction on the rock when it moves from point A A to point B B at the bottom of the bowl has magnitude 0.22 J J .

a. Between points AA and BB, how much work is done on the rock by the normal force?

c. What is the speed of the rock as it reaches point BB?

d.Of the three forces acting on the rock as it slides down the bowl, which (if any) are constant and which are not? Explain.

e. just as the rock reaches point BB, what is the normal force on it due to the bottom of the bowl?

An object is thrown upward with an initial velocity of 32.1 m/s. When the object reaches it maximum height, it is true of the acceleration, a, and the velocity, v, that:

both its acceleration and velocity are zero

both its acceleration and velocity change sign

velocity is equal to zero, but acceleration is not

acceleration is equal to zero, but velocity is not

None of the above.

Please help. Only one answer is true. Please give reason why.

A tin can is filled with water to a depth of 43 cm . A hole 20 cm above the bottom of the can produces a stream of water that is directed at an angle of 34 ∘ above the horizontal.

Part A
Find the range of this stream of water.

Part B
Find the maximum height of this stream of water.

An antitank gun is located on the edge of a plateau that is 60 m above the surrounding plain. The gun crew sights an enemy tank stationary on the plain at a horizontal distance of 2.2 km from the gun. At the same moment, the tank crew sees the gun and starts to move directly away from it with an acceleration of 0.90 m/s². If the antitank gun fires a shell with a muzzle speed of 240 m/s at an elevation of 10deg. above the horizontal, how long should the gun crew wait before firing if they are to hit the tank.

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