03/14/22

Ideal Gas Equation Help!
A house has a volume of 1.45 x 10^4 cubic meters. At 20.0°C and 740 mm Hg, the air fills the house. If the temperature and pressure increases to 35.0°C and 780 mm Hg, how much air must be drawn... more
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03/14/22

Physics: Coulombs Law
Particles of charge +65 μC, +48 μC and -95 μC are placed in a line. The center one is 0.35 m from each other of the others. Calculate the net force on each charge due to the other two.  Determine... more
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03/13/22

graph shows it can you please help me
The graph below shows the decay rate of a 100 gram sample of strontium-90. According to the graph, how many grams of strontium-90 remain after 2 half-lives?Correct unit Incorrect
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03/13/22

A random sample of size 50 is taken from a large population with mean μ=160 and standard deviation σ=18.

A random sample of size 50 is taken from a large population with mean μ=160 and standard deviation σ=18. What is the mean of the sampling distribution of the sample means? What is the standard... more
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03/12/22

Function of equition can you please write more clearly
Strontium 90 is a radioactive isotope that decays according to the eqaution At=A0e−0.0244t, where A0 is the initial amount present and At is the amount present after t years. If you begin with 250... more
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03/12/22

Equation function

$4000 are invested in a bank account at an interest rate of 6 percent per year.Find the amount in the bank after 9 years if interest is compounded annually.   Find the amount in the bank after 9... more
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03/12/22

Equalization function

1.The fox population in a certain region has a continuous growth rate of 8 percent per year. It is estimated that the population in the year 2000 was 17500.(a) Find a function that models the... more
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03/12/22

Probability rolling a die
You roll a die repeatedly until you observe a 6 and then you stop. Let N denote the number of rolls you made before you stop. a) What is the probability of N = 10? b) What is the probability of... more
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03/11/22

How many times greater was the intensity of the 2011 earthquake?
The intensity levels I of two earthquakes measured on a seismograph can be compared by the formula log(I1I2)=M1−M2 using the common (base 10) logarithm and where M is the magnitude given by the... more
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03/11/22

Radius of hot-air balloon
The air in the hot air balloon is heated to 70 ° C. At the start, the surrounding atmospheric pressure is 98 kPa and the temperature is 28 ° C, the balloon is open from below, assuming a spherical... more
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03/11/22

In elastic collision

A 3520 kg truck moving north at18.5 m/s makes an INELASTICcollision with an 1480 kg carmoving east. After colliding, theyhave a velocity of 13.6 m/s at72.6°. What was the initial velocityof the... more
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03/10/22

If Roberto scored 85, what was his z-score?
On a nationwide math test, the mean was 75 and the standard deviation was 10. If Roberto scored 85, what was his z-score?
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03/10/22

Types of Bonds.
Atom A has an oxidation number of +2 and Atom B has an oxidation number of -2. What will be the total charge of the compound formed?
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03/09/22

Probability of winning
If I purchase 10 lottery tickets, with 44,020 prizes to be won and 1,100,000 total tickets sold, what are my odds of winning?
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03/09/22

I don’t understand how to calculate a and get the standard deviation for b, the mean for c and e, and don’t get f
The distribution of actual weights of wedges of cheddar cheese produced at a dairy is normal with a mean of 9.1 ounces and a standard deviation of 0.2 ounces. (Round to 2 decimal places for all... more
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03/09/22

2d momentum /inalastic collision

A 3520 kg truck moving north at18.5 m/s makes an INELASTICcollision with an 1480 kg carmoving east. After colliding, theyhave a velocity of 13.6 m/s at72.6°. What was the initial velocity and... more
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03/09/22

n inspector must select 4 tests to perform in a certain order on a manufactured part. He has a choice of 6 tests. How many ways can he perform 4 different tests?
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03/08/22

thermometer reading

A certain company manufactures precision thermometers that are supposed to give readings of 0.00° C at the freezing point of water. Tests on a large sample of these thermometers reveal that some... more
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03/08/22

Velocity Physics Qeustions
An arr‎ow w‎as sh‎ot dire‎ctly up in the air with a vel‎ocity of 𝟔𝟎. 𝟎 [m/s]. Disr‎egarding air resis‎tance,A. Wha‎t is the maxi‎mum heig‎ht reac‎hed by the ‎arrow?B. How lo‎ng will the arr‎ow stay... more
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03/06/22

statistics probability
A manufacturer knows that their items have a normally distributed length, with a mean of 5.4 inches, and standard deviation of 0.9 inches.If 25 items are chosen at random, what is the probability... more
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03/06/22

Physics homework
A heavy ball with mass 10 kg is suspended by a rope of length 4.5 m. It is pulled to one side and released, swinging like a pendulum; at its lowest point, it reaches a speed of 6 m/s. (a) What is... more
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03/06/22

How do I solve for proportion and Interest?
Because of the relatively high interest rates, most consumers attempt to pay off their credit card bills promptly. However, this is not always possible. An analysis of the amount of interest paid... more
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03/06/22

How would I solve for probability.
The lifetime of lightbulbs that are advertised to last for 3500 hours are normally distributed with a mean of 3700 hours and a standard deviation of 150 hours. What is the probability that a bulb... more
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03/06/22

Find momentum given a motion equation
Given a motion equation x=5-8t+4t2, and the object of 2 kg mass, find its momentum after 2 s and 4 s. What is the average force?Answers: 16 kg*m/s, 48 kg*m/s, 16 N
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03/04/22

How many days did it take the patient to recover?
If the recovery time for a surgery is normally distributed with a mean of 6.1 days and a standard deviation of 2.5 days. And the z-score for a recovery time is -1.45, how many days did the patient... more
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