Select the correct answer.

In which research method does a researcher change the value of one variable to determine how the change affects another variable?

A.

experiment

observational research

C. survey

D. case study

if one of the classic nuclear physics experiments at the beginning of the 20th century an alpha particle was accelerated toward a gold nucleus and its path was substantially deflected by the coulomb interaction if the energy of the doubly charged

A piece of silicon sample has a resistivity of 0.1 ω. Cm. Its thickness is 100µm. The electron mobility is 1350cm 2 v - 1sec-1. When a magnetic field of bz and an ix of 1ma is supplied, the hall voltage is found out to be - 70µv.

Which of the following organisms would most likely be found at the top of a food web? a Flowers b Bees c Birds d Foxes

How far away is the Sun from the Earth?

What potential difference is needed to stop an electron that has an initial velocity v=6.0

Sliding friction definition

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?

Find the current Voltage VD and current ID in the following circuit assuming (a) ideal diode. (b) Constant voltage drop model with Von = 0.75V (c) using the exponential model (I_0=1*10^ (-14)). Verify your results through Multisim simulation

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?