Other Physics Answers

while fishing, you notice that eight crests pass a given point in a time interval of 10s. You approximate the distance between two crests to be 1.2m. Calculate the

a. Speed of water waves and

b. Depth of water

What is the velocity of the wave in a guitar string having a length of 0.65m and a mass of 3.5g when subjected to a tension of 250N?

Using the triboelectric series, identify which of the two materials will become negatively charged if charged by friction.

1. Gold and Silk

2. Fur and Aluminum

3. Polyethylene and Cling Film

4. Cotton and Glass

5. Acetate fiber and Teflon

6. Brass and Silicon

7. Steel and Wood

8. Polyester and Copper

9. Silver and Gold

10. Nylon and rubber

1. When a Wool is rubbed with a PVC, the PVC acquires a charge of magnitude 5.43nC.

a. Did the wool gain or lose electrons?

b. How many electrons were transferred during the process?

c. What is the change in the mass of the wool?

d. What is the change of the mass of the PVC?

Ace City lies 36.8 km,40.4° West of North to Bus City.A bus beginning at Chapel City travels 54.50km at 37.6° North of West to reach Ace City.How far and in what distance is Blue City to Chapel City?

A superman is sitting on a tree 98m right with a baby he has rescued from the claws of a tiger. Unfortunately the child slips and fall with an initial velocity of 0ms^–². Superman realized what was happening 2 seconds later and flow to catch the child at a speed of 39.2ms^–¹. Calculate

(1) the time superman will fly before catching the child.

(2) the distance superman will fly before catching the child.

Directions: In this activity you will be able to calculate the electric charges using the superposition principle. Solve the following problems. Show your solutions.

1. Three point charges, which are equally separated by a distance of 20cm, are arranged along the y-axis in a vacuum. The topmost charge bears a charge of -4.0μC, the middle charge has a charge of 3.0μC, and the bottom carries a 7.0μC. What is the magnitude and direction of the net electrostatic force that the middle charge experiences.

2. Find the force of attraction between two ball bearings with charges of 6μC and 14μC mm apart from each other.

Directions: Solve the following problems stated below. Show your solutions.

a. A -1.49x10^-8 C charge is separated from a -1.15x10^-9 C charge by a distance of 2.01x10^20 m. Determine the repulsive force between the two charges.

b. Two charges (-2.09x10^-18 C and 1.60x10^-19 C) are separated by a distance of 4.01x10^-10 m. Compute the force of attraction between them.

Water is flowing in a fire

hose with a velocity of 1.0 m/s and a pressure of 200000 Pa. At the nozzle the

pressure decreases to atmospheric pressure (101300 Pa), there is no change in

height. Use the Bernoulli equation to calculate the velocity of the water

exiting the nozzle. (Hint: The density of water is 1000 kg/m3 and

gravity g is 9.8 m/s2. Pay

attention to units!)]

1. An unknown wire experiences an electric field of 10 V/m, and has a current density of 5.0 ✕ 10⁷ A/m² . What is the resistivity of the wire?