kitty

Three point charges are arranged in a horizontal line as shown below. Find the electric force (in units of kQ2/R2) on charge Q2 given the following: Q1 = 16 Q, Q2 = -9 Q, Q3 = -75 Q, r1 = 2 R, and r2 = 3 R. We choose that a positive force points to the right and a negative force points to the left.

Please help me figure this question out if you could not justanswer

Answer choices:

-84.0 kQ2/R2

-111 kQ2/R2

111 kQ2/R2

84.0 kQ2/R2

-369 kQ2/R2

Choose the correct statement regarding resistors in a circuit.

If you connect two different resistors in parallel in a circuit, then the current that flows through each of them is different.

If you connect two different resistors in series in a circuit, then the voltage across each of them is the same.

A) If you connect two different resistors in parallel in a circuit, then the current that flows through each of them is the same.

If you connect two different resistors in parallel in a circuit, then the voltage across each of them is different.

Two identical resistors in parallel have double the resistance of each individual one.

Which of the following statements are TRUE.

A The number and location of mitochondria within a cell can change, depending on the both the cell type and the amount of energy required.

B.The inner mitochondrial membrane contains porins, which allow pyruvate to enter for use in the citric acid cycle.

C.The inner mitochondrial membrane is actually a series of discrete flattened membrane-enclosed compartments called cristae, similar to what is seen in the Golgi apparatus.

D. All of the Above

I need clothes for the gym but I'm not looking to spend a ton of cash since I'm not a regular gym attendant

Online store? Regular stores?

Please attach links

Physics help

A car (mass 910 kg) is traveling with a speed of 48 mi/h. A bug (mass 8 mg) is traveling in the opposite direction.

**What speed would the bug need in (millions of mi/h) in order to slow down the truck by 3 mile per hour in a big bug splash (i.e., final speed 45 mi/h)?

A driver initially moving horizontally with speed 4 v dives off the edge of a vertical cliff and lands in the water a distance 2 d from the base of the cliff.

***How far from the base of the cliff would the driver have landed if the diver had been moving horizontally with speed 8 v?

PLEASE EXPLAIN!!!!

Physics help

A ball of mass 2 kg is uniformly accelerated from rest and travels 72 m in 6 s. What is its final kinetic energy (in J) after 6 s?

--->>>> please explain in detail how to find acceleration!!!!

To push a 44.0-kg crate up a frictionless incline angled at 26.0° to the horizontal, a worker exerts a force of 308 N parallel to the incline. The crate moves a distance of 5.50 m.

2)What work is done on the crate by the worker?

3)What work is done on the crate by the weight of the crate?

4)What work is done by the normal force exerted by the floor on the crate?

5)What is the total work done on the crate?

To push a 75.0-kg crate up a frictionless incline angled at 31.0° to the horizontal, a worker exerts a force of 514 N parallel to the incline. The crate moves a distance of 2.90 m.

What work is done on the crate by the worker?

A force F = (-90, 50) N acts on a mass of 6 kg. At time t = 0 s, the mass is initially at rest.

What are the (x,y) components of the velocity vector (in m/s) after 2 seconds?

Use the formula A = 1/2r^2θ to compute the area of the circular sector with the given central angle and radius.

θ = 11π/6 r = 24

help i have an exam tomorrow i am lost

helpp

I thought the answer was 6

A pork roast was taken out of a hardwood smoker when its internal temperature had reached 175°F and it was allowed to rest in a 80°F house for 20 minutes after which its internal temperature had dropped to 165°F. Assume that the temperature of the roast follows Newton's Law of Cooling.

Newton's Law of Cooling (Warming): The temperature T of an object at time t is given by the formula

T(t) = Ta + (T0 − Ta)e−kt,

where T(0) = T0 is the initial temperature of the object, Ta is the ambient temperature† and k > 0 is the constant of proportionality which satisfies the equation

(instantaneous rate of change of T(t) at time

t) = k (T(t) − Ta).

Express the temperature T as a function of time t in minutes.

T(t)=

Find the time at which the roast would have dropped to 140°F had it not been carved and eaten. (Round your answer to the nearest whole number.)

What is the molecular shape of the compund SSO3^2-

HELP I did it myself but the computer is not taking answer and I want to compare to if I'm right or wrong.....

A quarterback takes the ball from the line of scrimmage, runs backward for 13 yards, then runs parallel to the line of scrimmage for 24 yards. At this point, he throws a 44 yard forward pass straight down field, perpendicular to the line of scrimmage. What is the magnitude of the football’s resultant displacement?

2. Cliff divers at Acapulco jump into the sea from a cliff 32.8 m high. At the level of the sea, a rock sticks out a horizontal distance of 11.97 m. With what minimum horizontal velocity must the cliff divers leave the top of the cliff if they are to miss the rock?

3. An artillery shell is fired at an angle of 39.4◦ above the horizontal ground with an initial speed of 1850 m/s. Find the total time of flight of the shell, neglecting air resistance. Find its horizontal range, neglecting air resistance