The activity of a newly discovered radioactive isotope reduces to 96% of its original value in an interval of 2 hours. What is its half-life? a) 10.2 h b) 34.0 h c) 44.0 h d) 68.6 h

Q: 9 and 10. Thanks.

A: 9.The equation for dot product

Q: B A coin sits on a rotating turntable as shown in the figure. At the time shown in the figure, which…

A: We need to say what the direction of friction will be on the coin on turntable.

Q: A transformer changes the voltage from 110 VAC to 290 VAC. If the original current is 24 A, what is…

A: Given Data: Primary Voltage Vp=110 VAC  Secondary Voltage Vs=290 VAC  Primary Current Ip=24 A  To…

Q: Two objects having different masses are subjected to Identical forces act for the same length of…

A: It is given that two objects having same masses are subjected to identical forces for same length of…

Q: 01a. A 72 N force is applied to a 11 kg box on rough level ground. The coefficient of friction…

A: A free-body diagram for a body under the influence of external forces is the situation where this…

Q: Three charged particles are located at the corners of an equilateral triangle as shown in the figure…

A: let q1 = 2.8 x 10-6 Cq2 = 7 x 10-6 Cq3 = 4 x 10-6  C

Q: In the following diagram, the current passing through 20 Ohm is 1.5 A. 19. What is the current…

A:

Q: a) 61.3N b) 47.2N c) 33.4N d) 74.58N

A:

Q: Four equal +2.00-µC point charges are placed at the corners of a square 4.00 m on each side. (k =…

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Q: N vs. TIME graph below, click on the spot where the VELOCITY IS ZERO (the arrow will be placed where…

A: Introduction: When the body does not gets displaced with time, the velocity is said to be zero. So,…

Q: If a candle is 3 meters from a thin lens with a focal length of 2 m, find the image distance A) 2 m…

A:

Q: The coil in a loudspeaker has 55 turns and a radius of 3.7 cm. The magnetic field is perpendicular…

A: Given: In this question, the given details are, The coil in a loudspeaker has 55 turns and a radius…

Q: When you go out to your car one cold winter moning you discover a 0.70-cm thick layer of ice on the…

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Q: A solenoid with radius a produces a magnetic field with strength B pointing into the page. A square…

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Q: 3. If V = 12 V in the circuit below R = 100 N R2= 200 N %3| R3 = 100 N R5= 300 N R4 = 150 N R, = 100…

A: Solution: Given that V = 12 V and the values of other resistors

Q: (b) What is the y-component of the average velocity of the plane during the second leg of the trip,…

A: Velocity of the plane while traveling to the north east to city B. Hence plane travel from East (+x…

Q: The block in the drawing has dimensions LO×2L0×3L0.where Lo =0.3 m. The block has a thermal…

A: Give Thermal conductivity = 100j/s-mC  Delta T = 21- 12 ° C = 9 ° c

Q: 4. One on end of a pipe with a diameter of 5.00 cm, the pressure is 100 kPa and the speed of the…

A: Fluid mechanics.

Q: = 201². The fan blade in a jet engine rotates from rest with the angular acceleration a = 1 9. find…

A: GIVEN         Angular acceleration = α = 20t2

Q: A conducting bar of length 0.25 m and mass of 0.34 kg is pulled to the right with a Force of 3.0 N.…

A: Write a given values of this question. L=0.25mm=0.34kgF=3.0NB=0.750TR=50Ω

Q: Light bulb 1 operates with a filament temperature of 2500 K, whereas light bulb 2 has a filament…

A: T1=2500k. T2=1900k.

Q: 6&7 please

A:

Q: 5) Let's use this expression to solve a problem. Star X and Star Y are intrinsically identical…

A: Given, star X is located 20 light-years from earth star Y is located 40 light-years  from earth…