Two charges each +q are initially separated by a distance d. If you triple the distance, the magnitude of the force does what?

A 750-g disk sliding along frictionless ice with a speed of 8.5 m/s strikes a stationary rod-disk combo 12-cm from its center-of-mass. This rod-disk combo is made from a 360-g rod that is 35-cm long, with 2 150-g solid disks of radius 7.0-cm attached, one on each end of the rod. After the perfectly elastic collision, the disk moves off along a path that is 28º above its original path, while the rod-disk combo spins about its center-of-mass as it moves off at an angle as well. Using this information, find the translational speed of both objects after the collision, the angular speed of the rod-disk combo, and the angle of its trajectory.

Explain the Enzyme-Based sensors for the assay of glucose. Discuss the reaction mechanism too. Explain in detail working principle with the chemical reactions involved in this measurement.

The acceleration of a 5.00 kg object (a box) is described below.

From t=0 to 10.00 seconds, the acceleration is time-dependent and is given by the formula: a=(0.200 m/s^3) t

From time t= 10.00 up to t=15.00 seconds, the acceleration of a box is constant and is given by the following formula: a=2.00 m/s^2

From t=15.00 up to t=25.00 seconds, the acceleration is given by a=(-0.200 m/s^3)t+5.00 m/s^2

Produce a single graph (of Force vs. time) in Excel that illustrates this. Your data should start at t=0 and go up to t=25.00 in increments of 1.00 seconds.

After you have produced the graph, calculate the impulse (J) from the graph. Note that the impulse is the area under a force v. time graph curve.

Impulse= _______ kg m/s

The acceleration of a 5.00 kg object (a box) is described below.

From t=0 to 10.00 seconds, the acceleration is time-dependent and is given by the formula: a=(0.200 m/s^3) t

From time t= 10.00 up to t=15.00 seconds, the acceleration of a box is constant and is given by the following formula: a=2.00 m/s^2

From t=15.00 up to t=25.00 seconds, the acceleration is given by a=(-0.200 m/s^3)t+5.00 m/s^2

Produce a single graph (of Force vs. time) in Excel that illustrates this. Your data should start at t=0 and go up to t=25.00 in increments of 1.00 seconds.

After you have produced the graph, calculate the impulse (J) from the graph. Note that the impulse is the area under a force v. time graph curve.

Impulse= _______ kg m/s

Assume that the speed of the ball is what you found the in previous question. What is the tension force in the rope when the ball is the bottom of its circular path? Enter you answer in multiples of (mg).

For example, if you find the tension force is  you should enter 3.75 as you answer.

My speed was 3.13 m/s - marked correct. the Radius is 1m.

The answer is not 1.32 - as previously answered on another question.

What is the energy required to turn 1000 cubic centimeters of ice at -10 degrees Celsius into water at 90 degrees Celsius

Define and describe four ways in which fluorescence excitation is more sensitive than optical absorption.

A professional boxer hits his opponent with a 1345-N horizontal blow that lasts for 0.122 s.

a) Calculate the impulse (in kg · m/s) imparted by this blow.

b) What is the opponent's final velocity (in m/s), if his mass is 113 kg and he is motionless in midair when struck near his center of mass?

c) Calculate the recoil velocity (in m/s) of the opponent's 11.4 kg head if hit in this manner, assuming the head does not initially transfer significant momentum to the boxer's body.

A point charge of -2.5 µC is located at the origin. A second point charge of 11 µC is at x = 1 m, y = 0.5 m. Find the x and y coordinates of the position at which an electron would be in equilibrium.
x =  m
y =  m

A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 22 C°. ΔL/(L0,Silver + L0,Gold) Determine the fractional decrease in the rod's length using the formula above, where L0,Silver and L0,Gold are the initial lengths of the silver and gold rods.

What are the 3 types of boundary effects and give a basic description of each?

Two resistors, R1 = 20-ohm and R2 = 30-ohm, are connected in parallel to each other, and this combination is connected across a 30-V source of emf. The current through the resistor R2 is:

Consider an experiment with a beam of relativistic particles hitting a target. Show that the cross-sectional area perpendicular to the direction of the beam propagation is a relativistic invariant.

Explain the differences between primary electrons, secondary electrons, Auger electrons, and backscattered electrons and how they are used in SEM imaging and analysis.