In a region where the speed of sound is 330 m/s, a source of sound emits a frequency of 440Hz. Assuming the observer is not moving, at what speed would the source have to move for the observed frequency to be 330Hz? Are they moving towards or away?

A. Torwards

B. Away

C. This situation is not possible

D. The Observer is at rest

Part 2: Use the setup above. Enter the speed of the source with the units of m/s, entering only the numerical value without units. If the situation is not possible, enter -1

Please show all work including how you planned the problem, executed the problem, and a potential way to check the answer! Thank you!

In this problem the goal is to explore how charge density, total charge,
and the differential charge elements are related.

Consider a sphere of radius R with p = ar^2 + br where a and b
are constants. Find a relationship between a; b and R such that the total
charge of the sphere is 0. Verify the dimensions (or units) of your solution
are correct

Please show your work

A 1.0 toaster and a 2.0 lamp are connected in parallel with the 110-V supply of your house. (Ignore the fact that the
voltage is AC rather than DC.)
(a) Draw a schematic of the circuit.
(b) For each of the three components in the circuit, find the current
passing through it and the voltage drop across it.
(c) Suppose they were instead hooked up in series. Draw a schematic
and calculate the same things.

Draw a position-vs-time, velocity-vs-time, and acceleration-vs-time graph for each of the following objects:

1. A car traveling in a straight line at a constant speed.

2. A ball rolling down a hill, getting faster as time goes by.

3. A rock that is tossed straight up in the air before coming back down to its starting point.

how many individual polarizers would you need to rotate a laser beams polarization axis by 90 degrees and lose only 5% intensity? what would be the relative angle between each polarizer

There are A, B and C, three plastic balls, A and B, B and C, C and A are attracted to each other, if A is positive: Group of answer choices

1. Both B and C are negatively charged.

2. One of the B balls and the C balls is going to be negatively charged and the other one is not charged

3. B ball, C ball has no charge

4. B ball is negatively charged, C ball is positively charged

A 0.158 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.900 m/s . It has a head-on collision with a 0.297 kg glider that is moving to the left with a speed of 2.30 m/s . Suppose the collision is elastic.

A. Find the magnitude of the final velocity of the 0.158 kg glider.

B. Find the magnitude of the final velocity of the 0.297 kg glider.

Suppose you hear a car approaching and its horn is heard as a 3037. Hz tone. After passing, you hear 2430. Hz. (a) What was the Mach number of the car?

A volleyball is spiked so that its incoming velocity of +4.1 m/s is changed to an outgoing velocity of -16 m/s. The mass of the volleyball is 0.34 kg. What impulse does the player apply to the ball?
____ kg·m/s

A Dewar bottle is a double-walled glass container whose interior has been made empty. These containers are generally used to conserve substances at very low temperatures

a) If the vacuum pressure is 1.00 Pa, calculate the mean free path of the enclosed molecules between the walls of the Dewar at a temperature of 220 K, taking an effective value of 0.4 nm² for the cross section.

b) What is the frequency of collision between the molecules of this gas?

c) What is the purpose of the vacuum between the walls of this vessel?

Calculate the average speed, collision frequency, average free travel and the total number of shocks for 1 mole of nitrogen found in a 0.5 L container at a temperature of 280 K. (σ = 0.4 nm²)

Calculate the proportion of atoms on the surface atomic layer of Ag spheres with the diameters below given that the thickness of the surface atomic shell is 0.289 nm, stating any assumptions made.

(a) 1 μm (b) 10 nm (c) 5 nm

please explane in detail ,

Indigenous people sometimes cook in watertight baskets by placing hot rocks into water to bring it to a boil. What mass of 500°C granite must be placed in 4.00 kg of 15.0°C water to bring its temperature to 100 °C , if 0.0250 kg of water escapes as vapor from the initial sizzle?

1. To solve this problem, we need to know how many different steps of heat absorption take place before thermal equilibrium is reached. Please write a few sentences to describe the steps

2. We also need to know how many different steps of heat release take place. Please write a few sentences to describe the steps.