realgrimudy

1. How much will it cost to take a 625 mile trip if your car gets 25.0 mpg with the cost of gasoline at 4.97 per gallon 

Calculate the mass percent of oxygen in chromium(III) nitrate, round your answer to the nearest percent

Amy pays $25 to enter a state fair, plus $3 for each ride. Which of the following equations represent her total cost?

⭕ A. y = 28x

⭕ B. y = 3x + 25

⭕ C. y = 25x + 3

⭕ D. y = 3x + 28

For the following processes, state whether each of the four thermodynamic
quantities q, w, E, and H is greater than, equal to, or less than zero for the system
described. Consider all gases to behave ideally. Each system is indicated by ita1ic
type. State explicitly any reasonable assumptions that you may need to make.
(a) Two copper bars, one initially at 80°C and the other initially at 20°C, are
brought into contact with one another in a thermally insulated compartment and
then allowed to come to equilibrium.
(b) A sample of liquid in a thermally insulated container (a calorimeter) is stirred
for 1 h by a mechanical linkage to a motor in the surroundings.
(c) A sample of H2 gas is mixed with an equimolar amount of N2 gas at the same
temperature and pressure under conditions where no chemical reaction occurs
between them.

A vertical electric field of magnitude 2.00×104 N/C exists above the Earth’s surface on a day when a thunderstorm is brewing. A car with a rectangular size of 6.00 m by 3.00 m is traveling along a dry gravel roadway sloping downward at 10.0°. Determine the electric flux through the bottom of the car. 

(a) Find the magnitude of the electric force between a Na+ ion and a Cl- ion separated by 0.50 nm. (b) Would the answer change if the sodium ion were replaced by Li+ and the chloride ion by Br-? Explain. 

 

The greatest common factor is ⬜

A block of mass M is on a frictionless surface as shown below. It is attached to a wall by 
two springs with the same constant K. Initially the block is at rest and the springs unstretched. The block is pulled a distance A and then released. (a) What is the speed of 
the block as it passes through equilibrium? (b) What is the angular frequency ω of the 
motion? (c) If the two springs were replaced by one spring so that ω remains the same, 
what would its spring constant have to be? (d) If the two springs were kept, what would 
the mass have to be so that it has the same ω as a system comprised of a single block of 
mass M and spring with stiffness K?

Find the total area enclosed by 4 non overlapping rectangles if each rectangle has a width of 4 meters and the heights are 4,5,6, and 7 meters respectively 

The largest digit used in Hindu-Arabic number system is

Diana invested $3000 in a savings account for 3 years. She earned $450 in interest over that time period. What interest rate did she earn? Use the formula I=Prt to find your answer, where I is interest, P is principal, r is rate and t is time. Enter your solution in decimal form rounded to the nearest hundredth. For example, if your solution is 12%, you would enter 0.12.