If you see Alice going to your left at exactly 0.99c and Bob going to your...
If you see Alice going to your left at exactly 0.99c and Bob going to your right at exactly 0.99, Alice will say that Bob is
a) going away from her at 1.98c
b) going away from her at exactly 0.99c
c) going away from her at exactly c
d) going away from her at about 0.98
e) going away from her faster than 0.99c, but slower than c
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If you see Alice going to your left at exactly 0.99c and Bob
going to your...
A spaceship is moving past Earth at 0.99c. The spaceship fires two lasers. Laser A is...
A spaceship is moving past Earth at 0.99c. The spaceship fires two lasers. Laser A is in the same direction it is traveling, and Laser B is in the opposite direction. How fast will the light from each laser be traveling according to an observer on Earth? Select one: a. The light from Laser A will be traveling at 1.99c, the light from Laser B at 0.010 b. The light from Laser A will be traveling at c, the light...
Alice G LOO Bob Let's revisit the simultaneity problem from worksheet 11. To make things concrete,...
Alice G LOO Bob Let's revisit the simultaneity problem from worksheet 11. To make things concrete, we'll include specific numbers. Bob is standing on the ground watching Alice go by in a high-speed train. As seen in Bob's reference frame, Alice is traveling to the right at speed v = +0.80c. As measured in Bob's frame, Alice's rail car is 12 m long. Alice is sitting in the exact center of the train car. At the instant that the Alice...
Problem 1. (20 points) Consider a game with two players, Alice and Bob. Alice can choose...
Problem 1. (20 points) Consider a game with two players, Alice and Bob. Alice can choose A or B. The game ends if she chooses A while it continues to Bob if she chooses B. Bob then can choose C or D. If he chooses C the game ends, and if he chooses D the game continues to Alice. Finally, Alice can choose E or F and the game ends after each of these choices. a. Present this game as...
5. Consider the RSA encryption scheme, Alice wants to send a message to Bob. Both Alice...
5. Consider the RSA encryption scheme, Alice wants to send a message to Bob. Both Alice and Bob have p= 17,9 = 19. Alice has e=31 and Bob has e=29. a. What is the public key pair used in the transmission? 2 marks b. What is the secret key pair used in the transmission? 4 marks c. Encrypt the message m=111. 4 marks d. Decrypt the resulting ciphertext. 4 marks e. What's the security problem between Alice and Bob? How...
1. You are in your car when you hear a siren. In which case will you...
1. You are in your car when you hear a siren. In which case will you hear the highest frequency soundwave from the siren? a. You and the moving siren approach each other b. You and the moving siren drive away from each other c. You and the moving siren are going in the same direction, but you move slower than the vehicle with the siren d. Neither you nor the siren are moving e. You and the moving siren...
Question1: Alice and Bob use the Diffie–Hellman key exchange technique with a common prime q =...
Question1: Alice and Bob use the Diffie–Hellman key exchange technique with a common prime q = 1 5 7 and a primitive root a = 5. a. If Alice has a private key XA = 15, find her public key YA. b. If Bob has a private key XB = 27, find his public key YB. c. What is the shared secret key between Alice and Bob? Question2: Alice and Bob use the Diffie-Hellman key exchange technique with a common...
Question 2: You are Alice. Bob publishes his ElGamal public key (q, a, ya) = (101,...
Question 2: You are Alice. Bob publishes his ElGamal public key (q, a, ya) = (101, 2, 14). You desire to send the secret message “CALL ME” to Bob. Using the equivalence A = 01, B = 02, and so on up to Z = 26, you encode the message into the number 03 01 12 12 13 05. Regarding each of these two-digit numbers as a plaintext block, compute the message that you will send to Bob using his...
Design an O(n)-time non-losing strategy for the first player, Alice, in the coins in-a-line game. Your...
Design an O(n)-time non-losing strategy for the first player,
Alice, in the coins in-a-line game. Your strategy does not have to
be optimal, but it should be guaranteed to end in a tie or better
for Alice.
Coins in a Line 12.4.1 The first game we consider is reported to arise in a problem that is sometimes asked during job interviews at major software and Internet companics (probably because it is so tempting to apply a greedy strategy to this...
While sitting at a bus stop, a car drives past you going to the right with...
While sitting at a bus stop, a car drives past you going to the right with a speed v. Less than a minute later, the same car drives past you to the left at the same speed v. Assume that the contents of the car didn't change between those two times. What can you say about the net impulse on the car between those two times ? a It points right b It points left c It is zero d...
please explain Consider the two-qubit Bell state l'1*) = 101) +110)) shared by Alice and Bob....
please explain
Consider the two-qubit Bell state l'1*) = 101) +110)) shared by Alice and Bob. Alice also possesses an additional qubit, in state lx) = a10) +이 1), with lal2+b21. Alice's goal is to teleport state lx) to Bob (neither of the two is assumed to know the values of a and b). The total state of the system a. Assume you do not have direct access to Bell state measurement for Alice's two qubits. Construct the protocol Alice...
A spaceship is moving past Earth at 0.99c. The spaceship fires two lasers. Laser A is in the same direction it is traveling, and Laser B is in the opposite direction. How fast will the light from each laser be traveling according to an observer on Earth? Select one: a. The light from Laser A will be traveling at 1.99c, the light from Laser B at 0.010 b. The light from Laser A will be traveling at c, the light...
Alice G LOO Bob Let's revisit the simultaneity problem from worksheet 11. To make things concrete, we'll include specific numbers. Bob is standing on the ground watching Alice go by in a high-speed train. As seen in Bob's reference frame, Alice is traveling to the right at speed v = +0.80c. As measured in Bob's frame, Alice's rail car is 12 m long. Alice is sitting in the exact center of the train car. At the instant that the Alice...
Problem 1. (20 points) Consider a game with two players, Alice and Bob. Alice can choose A or B. The game ends if she chooses A while it continues to Bob if she chooses B. Bob then can choose C or D. If he chooses C the game ends, and if he chooses D the game continues to Alice. Finally, Alice can choose E or F and the game ends after each of these choices. a. Present this game as...
5. Consider the RSA encryption scheme, Alice wants to send a message to Bob. Both Alice and Bob have p= 17,9 = 19. Alice has e=31 and Bob has e=29. a. What is the public key pair used in the transmission? 2 marks b. What is the secret key pair used in the transmission? 4 marks c. Encrypt the message m=111. 4 marks d. Decrypt the resulting ciphertext. 4 marks e. What's the security problem between Alice and Bob? How...
Design an O(n)-time non-losing strategy for the first player,
Alice, in the coins in-a-line game. Your strategy does not have to
be optimal, but it should be guaranteed to end in a tie or better
for Alice.
Coins in a Line 12.4.1 The first game we consider is reported to arise in a problem that is sometimes asked during job interviews at major software and Internet companics (probably because it is so tempting to apply a greedy strategy to this...
please explain
Consider the two-qubit Bell state l'1*) = 101) +110)) shared by Alice and Bob. Alice also possesses an additional qubit, in state lx) = a10) +이 1), with lal2+b21. Alice's goal is to teleport state lx) to Bob (neither of the two is assumed to know the values of a and b). The total state of the system a. Assume you do not have direct access to Bell state measurement for Alice's two qubits. Construct the protocol Alice...
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