Which best describes what forms in nuclear fusion? two smaller,more stable nuclei two larger,less stable nuclei one smaller,less stable nucleus one larger ,more stable nucleus
Part 1-True/False (20% ) Write "True" if the Statement is correct or "False" if it is incorrect on the separate answer sheet 1. A machine can change one form of energy in to another form of energy 2. A lever multiply force and energy at the same time. 3. When the load is greater than the effort, it is said to be force multiplier. 4. Actual mechanical advantage is formed if there is no waste of energy because of friction. 5. If the mechanical advantage is greater than one the machine is a force mu 6. Spring is a type of simple machine. 7. Fishing pole is an example of third class lever. 8. Inclined plane is used to multiply speed. 9. A machine produces an output force of (1)/(2) times the input force The machine is said to be force multiplier. 10. The velocity ratio of single fixed pulley is 2. Part II:- Multiple choices (56% ) Choose the correct answer from the given alternatives and write the letter of your choice on the separate answer sheet. 11. A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the processes of A. radiation C. convection B. absorption D. conduction 12. What is the quantity of heat energy required to heat a 10kg block of copper from 300 K 340 K? ( use specific heat capacity of copper=420J/kgK A. 168 KJ C. 168 J B. 125 KJ D. 125J 13. Calculate the increase in length of a 40 cm brass rod that is heated from 30^circ C to 50^circ C (linear expansion of Brass is 1.9times 10^-5K^-1 A. 0.51 cm B.1.9 cm C. 0.015 cm D. 15.20 cm
36. What kind of interference occurs between two identical waves moving in opposite direction and the two waves are out of phase? A. Constructive C. Destructive B. Bothe constructive and destructive D. Impossible to determine 37. Imagine you are sitting in a room and someone is playing kirar outside and next to your room.You may be able to hear the sound of the kirar through the open door way,you cannot see kirarist. This is because of A. reflection C. diffraction B. interference D. refraction art III. Blank space( 6% ) 38. The reflection of sound is __ 39. The quantity of heat needed to raise the temperature of 1 Kg of a substance through 1C^0 or lK is __ 40. The energy that flow from high temperature to low temperature is __
When loading a small boat such as a canoe or kayak,how should most of the weight be placed? mostly in the bow balanced and low balanced and high mostly in the stern
Boyle's Law can be expressed as: t constant n and T:Valpha 1 P or PV=constant True False
Johannes Kepler showed that: The phases of Venus are like the moon. The planets move around the sun in an ellipse. Gravity is responsible for the solar system Astrology explains everything that happens in life.
Multiple Select Question Select all that apply Which of the following factors influence the glow of a cathode ray? Type of gas Material of the cathode Gas pressure Time of day
Question 22 of 25 Which of the following represents a gamma emission? A. (}_{28)^60Niarrow _(28)^60Ni+gamma B (}_{89)^228Acarrow _(90)^228Th+beta C (}_{86)^220Rnarrow _(84)^216Po+_(2)^4He D. (}_{83)^212Biarrow _(84)^212Po+_(-1)^0e
A scientist makes a measurement and gets a value of 90.6 m The true value is 60.0 m. Calculate the absolute and relative error of the scientist's measurement. Round your answers to a reasonable n number of decimal places.Also be sure your answers include any necessary symbols. absolute error: square relative error: square
Because lightning is electricity, strike victims are not safe to touch after they have been struck. True False
Fill in the Blank Question Along the trajectory of a projectile, the $\square $ velocity remains constant, because there is no $\square $ in that direction. C Need help? Review these concept resources. Read About the Concept
What is the missing particle for the following nuclear decay process? ${}_{55}^{137}Cs\rightarrow _{56}^{137}Ba+?$ ${}_{1}^{0}\alpha $ ${}_{-1}^{0}\beta $ ${}_{1}^{0}\beta $ ${}_{0}^{1}n$
The diameter of a hydrogen atom is about meters. A protein molecule has an overall length of 3000 times (or $3\times 10^{3}times)$ the diameter of a hydrogen atom. What is the length of the protein molecule,. in meters , if it were written in scientific notation? $3.15\times 10^{-8}meters$ $3.15\times 10^{-12}meters$ meters $3.15\times 10^{-7}meters$
Which quantity will have the units "rad/s"? A linear displacement B angular displacement C linear velocity D angular velocity
What happens to the water pressure when water moves on a downward slope through layers of rock and soil? the water pressure increases the water pressure is unchanged the water pressure decreases the water pressure decreases then increases
An electron is a __ charged particle. a. negatively J. neutrally c. positively C B A
In order to maximize the thermal effects of ultrasound, the treatment area should be no more than three (3) times the size of the soundhead surface. True False
Question 2 (2 points) Why is Ohm's Law relevant? Ohms law is extremely important to the world of electrical circuits and components but is not suitable for every electrical circuit and application. There are certain requirements that a circuit and electrical component should meet to ensure that Ohms law is applicable. Ohms law can be used to calculate the required value of Voltage or components within a circuit, it can also work out the amount of current that flows in an electrical circuit when resistors can be measured across electrical components such as voltage. Ohm's Law is not relevant Ohm's Law is only used in a DC circuit.
What is a room designed to absorb sound called? anechoic chamber reflection chamber echo chamber absorption chamber
True or false, all else being equal, water flows with a higher velocity thorough a semi- circular channel than a wide, shallow channel. True False
