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Radio waves and gamma rays are parts of the electro magnetic spectrum. Which of the following is true about the energy carried by this waves
A. All electro magnetic waves carry the same energy
B. Radio waves carry the lowest energy since they have the lower frequency
C. Gamma rays carry the lowest energy since they have the lowest frequency
D. Radio waves carry the highest energy since they have the highest energy
Which of the followinv is an ohmic material?
a. dirty water
b. breast implant
c. tin cans
d. CD and DVD
Three resistors R1=1.00Ω , R2=2.00Ω , and R3=2.00Ω , are connected in series The series connection is attached to a V=3.00V voltage source.
a. What is the equivalent resistance?
b.find the current supplied by the source to the series circuit?
The most usually-studied capacitors is made up of two parallel conducting plates. These are separated by 1.77 mm. What is the capacitance in air if the plate in 17 cm2? What is the charge is a potential difference of 120 V is applied?
Two neutrally-charged bodies are separated by 2cm. Electrons are moved from one body and placed on the second body until a force of 1.7x10-7 N is generated between them. How many electrons were transferred between the bodies?
The force in the middle of two identical charges separated by 1.77 cm is equal to 70N. What is the magnitude of the two forces?
A university graduate standing on the ground fires a rocket into the atmosphere at a velocity of 4000 m/s at an angle of 20 degrees to the vertical axis. Determine (g = 9.8 m/s2):
(a) The time of flight
(b) The maximum level
4. Let vectors 𝑨=𝑛𝑖̅−3𝑗̅+2𝑘 and 𝑩 =3𝑖̅−2𝑗̅+3𝑘
(a) Find the scalar product of the two vectors.
(b) For n = 3, find the cross product of the two vectors. (4) (c) For n = 1, use the cross product to find the angle between the two vectors.
5. A vector 𝑹 has a direction of 30 with respect to the y-axis. Draw this vector and find
its x and y components if its magnitude is 7 m.
Derive the equation of motion of a simple harmonic motion and obtain the expression for its velocity time period and frequency
A particle charge 4 x 10-9 C is located at a point (0,0) in a certain coordinate system. Assuming all lengths are in meters, calculate the potential of the following points: A (3,3) and B (0,2). How much work is needed to take a particle of charge 2 x 10-5 C from A to B?
#340153 on Dec 2023