Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.6 m/s² for 4.4 seconds. It then continues at a constant speed for 8.2 seconds, before applying the brakes such that the car

Find the electric field at the location of q_a in the figure below, given that q_b = q_c = q_d = +1.85 nC, q = ?1.00 nC, and the square is 11.5 cm on a side. (The +x axis is directed to the right.)

A 0.190-kg cube of ice (frozen water) is floating in glycerine. The gylcerine is in a tall cylinder that has inside radius 3.60 cm . The level of the glycerine is well below the top of the cylinder. If the ice completely melts, by what distance does the height of liquid in the cylinder change?

A beam of unpolarized light with intensity 170 W/m^2 is incident on a pair of ideal crossed (perpendicular) polarizers. You insert a third ideal polarizer between the two polarizers with its polarizing axis at 45∘ to the others. Determine the intensity of the emerging light after you insert the third polarizer. Express your answer with the appropriate units.

On February 23, 1987 astronomers noticed that a relatively faint star in the Tarantula Nebula in the Large Magellanic Cloud suddenly became so bright that it could be seen with the naked eye. Astronomers suspected that the star exploded as a supernova. Late-stage stars eject material that forms a ring before they explode as supernovas. The ring is at first invisible. However, following the explosion the light from the supernova reaches the ring. Astronomers observed the ring exactly one year after the phenomenon itself occurred (Figure 1). The angular size of the ring is 0.81 arcseconds.

Use geometry and the speed of light to estimate the distance to the supernova.

1. A muon and an antimuon are moving in opposite directions with velocities of -0.6 c and 0.6 c, respectively. When they collide, they can annihilate each other and turn into two photons. Both muon and antimuon have a mass of 105.66 MeV/c2. What is the total energy before the collision?

2. What is the energy of each photon?

3. What is the wavelength of each photon?

A particle has a rest mass of 6.55×10−27 kg and a momentum of 4.34×10−18 kg⋅m/s . Determine the total relativistic energy of the particle

PLEASE GIVE MORE THAN YES OR NO ANSWERS

a) Does the pitch of the noise made by striking a bottle get higher or lower as you fill the bottle with water?

b) Does the pitch made by blowing across the top of the bottle go up or down as you fill the bottle?

c) Why is there a difference between these two noises? In your answer, comment on the source of the noise in each case (i.e. What is vibrating?).

d) Using what you know about harmonics and resonance, explain how different pitches are created when you blow across the bottle opening with different liquid levels.

e) What wave property allows you to hear noise through a bottle held up to your ear when someone blows across the top of a bottle across the room, and how does the sound transmit from one bottle to the other? Will the pitch sound the same as the one made by the person across the room?

If 2.00 m3 of a gas initially at STP is placed under a pressure of 5.00 atm, the temperature of the gas rises to 30.0°C. What is the volume?

answer in m3

A dielectric-filled parallel-plate capacitor has plate area A = 20.0cm2 , plate separation d = 8.00mm and dielectric constant k = 3.00. The capacitor is connected to a battery that creates a constant voltage V = 15.0V . Throughout the problem, use ?0 = 8.85

A 8.6-kg cube of copper (cCu = 386 J/kg-K) has a temperature of 750 K. It is dropped into a bucket containing 5.1 kg of water (cwater = 4186 J/kg-K) with an initial temperature of 293 K. 1) What is the final temperature of the water-and-cube system? K Submit 2) If the temperature of the copper was instead 1350 K, it would cause the water to boil. How much liquid water (latent heat of vaporization = 2.26 × 106 J/kg) will be left after the water stops boiling? kg Submit 3) Let's try this again, but this time add just the minimum amount of water needed to lower the temperature of the copper to 373 K. In other words, we start with the cube of copper at 750 K and we only add enough water at 293 K so that it completely evaporates by the time the copper reaches 373 K. Assume the resulting water vapor remaining at 373 K. How much water do we need ?

If a nucleus has mass M, Z protons (mass mp) and N neutrons (mass mn) its binding energy is equal to

Assume a planet is a uniform sphere of radius R that (somehow) has a narrow radial tunnel through its center. Also assume we can position an apple anywhere along the tunnel or outside the sphere. Let F_R be the magnitude of the gravitational force on the apple when it is located at the planets surface. How far from the surface is there a point where the magnitude of the gravitational force on the apple is F_R/2 if we move the apple (a) away from the planet and (b) into the tunnel? Express you answer in terms of the variables given.

A mass 1 0.400 kg block is released from rest at the top of a frictionless track height one=2.90 m above the top of a table. It then collides elastically with a 1.00 kg mass that is initially at rest on the table. Assume a perfectly inelastic equation.

a) Determine the speed of the two masses just after the collision. b. How far away from the bottom of the table does the 1.00 kg mass land, given that the table is 1.60 m high?

A piston contains 410 moles of an ideal monatomic gas that initally has a pressure of 2.89

Two identical pucks collide on an air hockey table. One puck was originally at rest.

(a) If the incoming puck has a speed of 6.00 m/s and scatters to an angle of 30.0