# Posts by Help!!!!

Total # Posts: 53

**Math**

A new oil field has just begun production. The first oil removed is the easiest to get out, and so production falls as time goes on. The instantaneous rate at which oil can be extracted is 14% of the amount of oil remaining per year. Here, "instantaneous" refers to ...

**Physics**

A 45.0 kg diver steps off a 8.0 m high diving board and drops straight down into the water. If the diver comes to rest 5.0 m below the surface of the water, determine the average resistance force exerted on the diver by the water.

**Physics**

1. A 55.0 kg pole vaulter running at 11.0 m/s vaults over the bar. Assuming that the vaulter's horizontal component of velocity over the bar is 1.0 m/s and disregarding air resistance, how high was the jump (include units)? 2. A 71 kg person rolls on a 2 kg skateboard with...

**Physics**

A child and sled with a combined mass of 45.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of 8.0 m/s at the bottom, what is the height of the hill (include units)?

**help please trig**

According to the Americans With Disabilities Act, a ramp can rise no more than 1 ft for every 12 ft of horizontal distance. To the nearest tenth degree what is the maximum angle that the ramp can form with the ground?

**BIOLOGY**

nope like genotypic ratio and phenotypic ratio....thanks though i figured it out...

**BIOLOGY**

THAT DIDN'T HELP!!!!!!!!!!!!!!!!!!!!

**BIOLOGY**

That didn't help. I meant like we have to make up our own problem to use on a quiz. She asked us to make 5 human genetic problems with answers but im not really sure what a problem like that would be like. Is that just the punnet squares and probability and stuff?

**BIOLOGY**

What is an example of a human genetic problem?

**biology**

thank you

**biology**

Red is dominate over blue, give the genotype for an individual who is heterozygous red, homozygous red, and blue.

**BIOLOGY**

CELLS THAT HAVE DNA BUT LACK A NUCLEUS ARE MEMBERS OF THE KINGDOM? A)VIRUSES B)MONERA C)FUNGI D)ANIMILIA E)PROTISTA

**Physics**

A sonar generator on a submarine produces periodic ultrasonic waves at a frequency of 2.60MHz . The wavelength of the waves in seawater is 5.90×10−4m . When the generator is directed downward, an echo reflected from the ocean floor is received 11.0s later. Part A ...

**Physics**

A wood cube 0.20m on each side has a density of 730kg/m3 and floats levelly in water. What mass has to be placed on top of the wood so that its top is just at the water level?

**English**

prepositional phrase? Appositive phrase? Participial phrase? Gerund phrase? infinitive phrase? Absolute phrase? Cape Code, a heavily settled peninsula southeast of Boston, has an interesting history. What is “a heavily settled peninsula southeast of Boston”? The ...

**Physics**

A baseball player pops a pitch straight up. The ball (mass 230g ) was traveling horizontally at 36.0m/s just before contact with the bat, and 21.0m/s just after contact. Part A Determine the magnitude of the impulse delivered to the ball by the bat. Part B Determine the ...

**physics**

We are standing at a distance d=15 m away from a house. The house wall is h=6 m high and the roof has an inclination angle β=30 ∘. We throw a stone with initial speed v0=20 m/s at an angle α= 35 ∘. The gravitational acceleration is g=10 m/s2. (See figure...

**Math**

If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ π/2. Therefore, to find y = sin−1(−3/22, we must find an angle y whose sine is -3/2. There are many possible angles with this sine, but the range of y = sin−1 x is restricted to...

**physics!!!**

A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 45.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the dispersion of the...

**physics**

Find the ratio of the gravitational force on the Moon due to the Earth to the gravitational force on the Moon due to the Sun. (The mass of the Earth is 5.97 1024 kg, the mass of the Moon is 7.36 1022 kg, the mass of the Sun is 1.99 1030 kg, and the average Earth-Moon distance ...

**physics**

a steel has a steel lid that is stuck tightly to the can. is it possible to open the can by running it under hot water? 1. yes 2. no 3. yes but only if the bottom of the can is submerged in ice water while the top is run by hot water. 4. no but could open the can by submerging...

**physics**

A Foucault pendulum is designed to demonstrate the effect of the Earth's rotation. A Foucault pendulum displayed in a museum is typically quite long, making the effect easier to see. Consider a Foucault pendulum of length 16 m with a 109-kg brass bob. It is set to swing ...

**physics**

A ball of circumference 74.2 cm and mass 605 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.) (a) Calculate the buoyant force on the ball. (Indicate the ...

**physics**

A fountain sends water to a height of 116 m. What is the difference between the pressure of the water just before it is released upward and the atmospheric pressure? (The density of water is 1000 kg/m2.)

**Physics (please help!!!!)**

A man of mass 80 kg and density 970 kg/m3 stands in a shallow pool with 31% of the volume of his body below water. Calculate the normal force the bottom of the pool exerts on his feet. (Take the positive direction to be up. Indicate the direction with the sign of your answer.)

**physics**

Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest known spot in the Earth's oceans, at 10.922 km below sea level. Taking density of seawater at atmospheric pressure (p0 = 101.3 kPa) to be 1024 kg/m3 and its bulk modulus to be B(p) = B0 + 6.67(p &#...

**physics**

A racquetball with a diameter of 5.6 cm and a mass of 42 g is cut in half to make a boat for American pennies made after 1982. The mass and volume of an American penny made after 1982 are 2.5 g and 0.36 cm3. How many pennies can be placed in the racquetball boat without ...

**physics/ torques**

A block of mass m = 5 kg is attached to a spring (k = 35 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 4 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and assuming the ...

**physics**

if the fulcrum of a .15 kg meter stick was placed at 25 cm and a 300 g mass at the 5 cm mark, would it be possible to balance the meter stick with a 100 g mass on the long side of the meter stick? what would the position of the mass have to be to balance the meter stick?

**physics**

The turbine and associated rotating parts of a jet engine have a total moment of inertia of 23 kg m2. The turbine is accelerated uniformly from rest to an angular speed of 140 rad/s in a time of 27 s. (a) Find the angular acceleration. (b) Find the net torque required. (c) ...

**Physics (please help!!!!)**

A thin uniform rod (length = 1.3 m, mass = 4.1 kg) is pivoted about a horizontal frictionless pin through one of its ends. The moment of inertia of the rod through this axis is 1/3 m L2. The rod is released when it is 55° below the horizontal. What is the angular ...

**physics**

A force, F = (2x + 5y) N, is applied to an object at a point whose position vector with respect to the pivot point is r = (2x + 4y + 5z) m. Calculate the torque created by the force about that pivot point.

**physics**

A demonstration gyroscope consists of a uniform disk with a 39-cm radius, mounted at the midpoint of a light 56-cm axle. The axle is supported at one end while in a horizontal position. How fast is the gyroscope precessing, in units of rad/s, if the disk is spinning around the...

**physics**

A race car is making a U-turn at constant speed. The coefficient of friction between the tires and the track is μs = 1.0. If the radius of the curve is 40 m, what is the maximum speed at which the car can turn without sliding? Assume that the car is performing uniform ...

**physics**

A particle is moving clockwise in a circle of radius 1.75 m. At a certain instant, the magnitude of its acceleration is a = a = 39.0 m/s2, and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this instant, find the ...

**physics**

i just want to find the number of revolutions , i know that 2 pi rad= 1 rev but how do we find that in this question.

**physics**

a) 4.5/3= 1.5 s b) i'm still confused of how to get the number of revolutions c) a=v^2/r the answer is 5.4 m/s d) at=r alpha but we need to find alpha first to get at

**physics**

A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 3.0 rad/s2. (a) How long does it take the discus thrower's speed to get to 4.5 rad/s? (b) How many revolutions does the thrower make to reach ...

**physics Only one part left !!!!!! PLZ HELP**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? = L/2 (b) ...

**physics Only one part left !!!!!! PLZ HELP**

A uniform, square metal plate with side L = 3.50 cm and mass 0.087 kg is located with its lower left corner at (x, y) = (0, 0) as shown in the figure. Two squares with side length L/4 are removed from the plate. (a) What is the x-coordinate of the center of mass? = L/2 (b) ...

**physics**

A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.0-m3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ...

**Physics (please help!!!!)**

how did you get the number 1355 for the sqrt of mass

**Physics (please help!!!!)**

Can you write the equations that you exactly used for each problem

**JOB INTERVIEW QUESTIONS**

thank for your help, I made it brief and straight to the point.

**JOB INTERVIEW QUESTIONS**

Yes, Thank you. You explianed everything, now where do I start?

**JOB INTERVIEW QUESTIONS**

THIS IS NOT MY HOMEWORK, I am having an interview for a job and they asked me this question. What would I document if this occurs.

**JOB INTERVIEW QUESTIONS**

You’ve recently completed a tour and now it’s time to write the customer a ‘Thank you’ note. Here’s the customer information: Name - Joe Smith Tour - Conducted in Apt. 1107 with a 2-bed 2-bath Interests - Pool, 24-hour fitness center, second bedroom ...

**Math:Calculus**

Use the Fundamental Theorem of Calculus to find the derivative of g(x)=1/(1+t^5)dt in the interval 1 to x.

**physics**

THANK YOU! GOT IT

**physics**

2.0g bullet fired with speed of 44.5m/s what is the kinetic? is there any conversions involved?

**Race and Ethnicity**

Can some tell me if these are the right answers This group is the same as a subordinate group. A defining feature of this group is that its members have less control or power over their lives than do members of dominant group. Answer: Minority group This describes the social ...

**Physics**

HOw many electrons make up a charge of -30 micro coulombs???

**math**

Find the critical numbers of each given function. (a) f(x)=3rt(x^(2)-x (b) g(x)=2sinx+2cos^(2)x, 0 <=x<=2pie For Further Reading

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