Physics, 28.11.2019 11:31 jamaiciaw6

Whats a short example of an experimental variable?

Answers: 3

Show answers

Answers

Experimental Variable—the variable that you are studying (changing) in an experiment. It is the only variable you change. hope that helps.

Answer from: sksksjs

Example: If you want to know how speed affects gas mileage, then speed is the only vari- able that should change. The car, tires, road, wind speed need to stay the same—be controlled. They are control variables.

Answer from: Quest

pretty sure it's false

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Another question on Physics

Physics, 21.06.2019 17:20

If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. what is its vertical displacement (in m) after 6 s?

Answers: 1

Answer

Physics, 22.06.2019 10:30

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?

Answers: 1

Answer

Physics, 22.06.2019 14:00

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

Answers: 1

Answer

Physics, 23.06.2019 03:30

Aspring that is stretched 2.6 cm stores a potential energy of 0.053 j. what is the spring constant of this spring?