You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 45° from the edge of the building with an initial velocity of 17 m/s and lands 67 meters away from the wall. How tall, in meters, is the building that the child is standing on?

A baseball pitcher throws a ball horizontally at a speed of 40.4 m/s. A catcher is 18.4 m away from the pitcher. Find the magnitude, in meters, of the vertical distance that the ball drops as it moves from the pitcher to the catcher. Ignore air resistance.

m

Consider eight of the ions Cl? and Na+ in a crystal lattice of common salt. The ions are located at the vertices of a cube measuring 2.82

By what potential distance must an electron (m0=9.11*10^-31 kg), be accelerated to have wavelength of 5.47*10^-12 m?

The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0? above the horizontal, some of the tiny critters have reached a maximum height of 58.7cm above the level ground.

Part A

What was the takeoff speed for such a leap?

Part B

What horizontal distance did the froghopper cover for this world-record leap?

Discuss how obesity affects the center of gravity and provide examples with calculations.

0. Why does the bandwidth of the amplifier play a role in determining the reso- lution of the system?

A red ball is thrown down with an initial speed of 1 m/s from a height of 26 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 23.5 m/s, from a height of 1 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s².

What is the speed of the red ball right before it hits the ground?

How long does it take the red ball to reach the ground?

What is the maximum height the blue ball reaches?

What is the height of the blue ball 1.9 seconds after the red ball is thrown?

How long after the red ball is thrown are the two balls in the air at the same height?

35% of the heat released from burning fuel in a campstove actually goes to heating a pot and its contents. You start with 1.3 kg of ice at -17 °C, 1.1 L of water at 22 °C, and a 360 gram aluminum pot at 28 °C. The ice and water are put into the pot and the system is heated to 100 °C with 22% of the liquid boiling away. The specific heat of aluminum is 0.22 cal/g-°C. The specific heat of ice is 0.5 cal/g-°C. One gram of fuel produces 46000 J when it is burned.

HINTS: Consider each part (ice, water, and pot separately)

HINTS: The given % that boils away is a combination of the melted ice and the water.

HINTS: Fuel doesn't come into play yet

1. How much heat is required to go into the pot and water?

Describe the physics and draw an illustration of charge polarization.

A physics student who is also a pilot is preparing to fly from the Daydon airport home to Kalona Iowa which is due west. Her plane flies with an airspeed (its speed relative to the air) of 106 knots. There is a strong wind blowing at 25 knots coming from the Northwest.

a. What heading should she fly? In other words, what direction should she aim the plane as she flies if she wants to go directly to Kalona? (In degrees North of due West.)

b. What will her ground speed be?

Lab background:

I set up two styrofoam cups attached together by an aluminum transfer bar (a conductor). One cup contained 200g of boiling water, while the other cup contained only 100g of ice water. Every two minutes, I took the temperature of both the cups. There were two slits on the top of the enclosed styrofoam cups to allow a thermometer to take the temperature of both of the contents in the two cups. It seems as though, the hot water LOST heat nearly twice as fast as the cold water gained heat.

Question 1: Why did this happen??? Does it have to do with the different volumes/ surface area?

Question 2: I later calculated the heat lost by the hot water and the heat gained by the cold water (which, technically, should be the same consiering the laws of thermodynamics). Heat lost= 27720 J and heat gained= 11340 J. So they are clearly not the same ... what 2 reasons could cause the difference???

Questions 3: How do I estimate at which both containers should stabilize???

thanks

A straight, nonconducting plastic wire 7.00 cmlong carries a charge density of 100 nC/mdistributed uniformly along its length. It is lying on a horizontal tabletop.

Find the magnitude and direction of the electric field this wire produces at a point 4.00 cm directly above its midpoint.

If the wire is now bent into a circle lying flat on the table, find the magnitude and direction of the electric field it produces at a point 4.00 cm directly above its center.

1.) The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.97×1024 kg. The Earth's average radius is 6.38×106 m. What is the magnitude of the gravitational force that the Earth exerts on the Hubble? (Answer in N)

An infinitely long line of charge has a linear charge density of 5.00×10⁻¹² C/m . A proton is at distance 16.0 cm from the line and is moving directly toward the line with speed 1000 m/s .

How close does the proton get to the line of charge?

In Fig, take E0 = 12 V, R1 = 4.0 W, R2 = 8.0 W, R3 = 2.0 W, and L = 2.0 H. What is the current I2 (a) immediately after the switch is first closed and (b) a long time after the switch is closed? (c) After a long time the switch is again opened. Now what is I2?

The Problem with the picture is on Problem 36 in the website below

https://www-physics.ucsd.edu/students/courses/winter2010/physics2b/hw/hw9.pdf