cornelius

A 5.5 kg object moving in the +x direction at 5.5 m/s collides head-on with a 2.5 kg object moving in the -x direction at 4.0 m/s. Find the final velocity of each mass for each of the following situations. (Take the positive direction to be +x.)

(a) The bodies stick together.

__________ m/s (5.5 kg mass)

____________ m/s (2.5 kg mass)

(b) The collision is elastic.

_____________ m/s (5.5 kg mass)

______________ m/s (2.5 kg mass)

(c) The 5.5 kg body is at rest after the collision.

m/s (5.5 kg mass)

m/s (2.5 kg mass)

(d) The 2.5 kg body is at rest after the collision.

m/s (5.5 kg mass)

m/s (2.5 kg mass)

(e) The 5.5 kg body has a velocity of 4.0 m/s in the -x direction after the collision.

m/s (5.5 kg mass)

m/s(2.5 kg mass)

An athlete executing a long jump leaves the ground at a 25° angle and travels 8.30 m.

(a) What was the takeoff speed?

Incorrect: Your answer is incorrect.

m/s

(b) If this speed were increased by just 4.0%, how much longer would the jump be

A diver running 1.6 m/s dives out horizontally from the edge of a vertical cliff and 3.4 s later reaches the water below.

How high was the cliff?

m

How far from its base did the diver hit the water?

m

A football is kicked at ground level with a speed of 10.0 m/s at an angle of 33.0° to the horizontal. How much later does it hit the ground?

Consider the following two-step process. Heat is allowed to flow out of an ideal gas at constant volume so that its pressure drops from PA = 1.7 atm to 1.4 atm. Then the gas expands at constant pressure, from a volume of 6.8 L to VC = 8.3 L where the temperature reaches its original value. See Fig. 15-27.

(a) Calculate the total work done by the gas in the process.

(b) Calculate the change in internal energy of the gas in the process.

Correct: Your answer is correct.

J

(c) Calculate the total heat flow into or out of the gas. (Heat flow into the gas is positive.)

J

The exhaust temperature of a heat engine is 250°C. What must be the high temperature if the Carnot efficiency is to be 30 percent

How many atoms are there in a 6.6 gram copper coin?

How many atoms are there in a 6.6 gram copper coin?

Part of a single rectangular loop of wire with dimensions shown in Fig. 21-51 is situated inside a region of uniform magnetic field of 0.445 T. The total resistance of the loop is 0.230 . Calculate the force required to pull the loop from the field (to the right) at a constant velocity of 3.70 m/s. Neglect gravity.

--------------- N?

A 5.8 MeV (kinetic energy) proton enters a 0.19 T field, in a plane perpendicular to the field. What is the radius of its path?

7.1/2 points | Previous Answers Giancoli6 20.P.029.My Notes |

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A vertical straight wire carrying an upward 13 A current exerts an attractive force per unit length of 8.8 ✕ 10-4 N/m on a second parallel wire 8.0 cm away. What current (magnitude and direction) flows in the second wire?

A

Alpha particles of charge q = +2e and mass m = 6.6 ✕ 10-27 kg are emitted from a radioactive source at a speed of 1.3 ✕ 107 m/s. What magnetic field strength would be required to bend them into a circular path of radius r = 0.23 m?

T

(a) What is the magnitude of the force per meter of length on a straight wire carrying a 9.76 A current when perpendicular to a 0.74 T magnetic field?

N/m

(b) What if the angle between the wire and field is 5.0°?

N/m

A C1 = 7.0 µF and a C2 = 3.0 µF capacitor are connected in series, and this combination is connected in parallel with a C3 = 3.7 µF capacitor (see Fig. 19-52). What is the net capacitance?

My SAT SCORE WAS Critical Reading 500 Math 420 Writing 480 is that a good or bad score

A 2300 W oven is hooked to a 240 V source.

(a) What is the resistance of the oven?

Correct: Your answer is correct.

(b) How long will it take to bring 80 mL of 15°C water to 100°C assuming 75% efficiency?

s

(c) How much will this cost at 11 cents/kWh?

cents

Two point charges, Q1 -20 µC and Q2 +50 µC are separated by a distance of d = 11 cm. The electric field at the point P (see Fig. 16-55) is zero. How far from Q1 is P?

answer should be in this format 12e-16