Home » #1 Let’s say that you throw a ball upward. It proceeds to achieve a maximum height (h), and it

# #1 Let’s say that you throw a ball upward. It proceeds to achieve a maximum height (h), and it

Question #1 Let’s say that you throw a ball upward. It proceeds to achieve a maximum height (h), and it falls to the ground. Your friend proceeds to release an identical ball from rest at height (h) and it falls to the ground. Please explain if the change in kinetic energy of your ball will be greater than, less than, or equal to the change in kinetic energy of your friend’s ball? Question #2 (multiple choice)A block of mass (m) proceeds to slide with constant speed down an incline of angle θ. Which of the following is true? Please explain your reasoning.a – The force of friction is greater than mg sin θ. b – The force of friction is equal to mg sin θ.c – The force of friction is less than mg sin θ.d – There is not enough information to make a determination.Question #3 A child slides down a park slide inclined at an angle of 26.5 degrees. The coefficient of kinetic friction measured between the child and the slide is 0.315. Find the acceleration.Question #4A ball is kicked and it leaves the ground with a speed of 10.5 m/s. The ball achieves a maximum height of 4.10 m. Ignoring air friction, solve for the speed of the ball at its maximum height. For this problem, use conservation of energy instead of Newton’s laws.

Three different size lights are running off a low voltage system. The resistance of the three lights are R1 =3
Three different size lights are running off a low voltage system. The resistance of the three lights are R1 =3 ohms, R2 = 9 ohms, and R3 = 9 ohms. They are all connected inseries with a 5.0 V battery. The internal resistance of the battery is negligible.What is the power of the system?

The figure below shows three points in the operation of the ballistic pendulum. The projectile approaches the pendulum in part
The figure below shows three points in the operation of the ballistic pendulum. The projectile approaches the pendulum in part (a) of the figure. Part (b) of the figure shows the situation just after the projectile is captured in the pendulum. In part (c) of the figure, the pendulum arm has swung upward and come to rest at a height h above its initial position. Find an equation for h in terms of m1 m2 and vi .please explain in detail.

A 1.4 kg object is wholly immersed in a uid that is NOT water. The object has a volume of
A 1.4 kg object is wholly immersed in a uid that is NOT water. The object has a volume of 0.0002 m3. It is found that the buoyant forceacting on this object is 15 N. Determine the density of the uid andwhether or not the object will sink, oat, or remain stationary.

-Let’s think about the difference between gauge and absolute pressure. Have you ever experienced the explosive opening of a
Physics Assignment Writing Service -Let’s think about the difference between gauge and absolute pressure. Have you ever experienced the explosive opening of a swelled up yogurt container you just bought from the store? It likely was manufactured at a different elevation with a different absolute atmospheric pressure. What change happens to the gauge pressure inside after being shipped to a different elevation and why? Describe in detail one real-life example where this situation might come in to play. (You might think of an example like what happens to car tires after changing elevation.) add references

Hi!, can somebody help me with this problem of X-rays and Compton effect, i need to determinate the subsections a,b,c,d,e.3.-
Hi!, can somebody help me with this problem of X-rays and Compton effect, i need to determinate the subsections a,b,c,d,e.3.- A 0.580 MeV photon is scattered by a free electron initially at rest so that the scattering angle of the scattered electron is equal to that of the scattered photon as shown in the figure below.a) Determine the angle of scattering of the photon and of the electron.b) Determine the energy of the scattered photon. (expresses the answer in MeV).c) Determine the quantity of movement of the scattered photon.d) Determine the kinetic energy of the scattered electron (express your answer in MeV).e) Determine the quantity of movement of the scattered electron.I’ve got this formulas:E0 = energy of the incident photonEf = Energy of the scattered photon.P0= quantity of movement of the incident photonPf= quantity of movement of the scattered photonPe= quantity of movement of the electronλ0= wavelength of the incident photonλf= wavelength of the scattered photon = Kinetic energy of the electronθ = Angle of deviation of the photon. = Angle of dispersion of the photon. 0 = frequency of the incident photon. f = frequency of the scattered photon. = VelocityC = 3×108 m/sCompton effect ecuation:If the photon hits with a electron:Compton effect:

1-The Solar Constant, 2 calories per square centimeter per minute, is _______. the annual amount of solar energy available at
1-The Solar Constant, 2 calories per square centimeter per minute, is _______. the annual amount of solar energy available at the top of the earth’s atmosphere.the solar power density at 93 million miles from the sun.the average solar intensity at ground level.extremely variable2-The spectrum of solar radiation above the earth’s atmosphere has its maximum in intensity _______.at the same wavelength as does the spectrum reaching the surface of the earth.at a wavelength higher than does the spectrum reaching the surface of the earth.is not related to the maximum in the spectrum reaching the surface of the earth.at a wavelength lower than does the spectrum reaching the surface of the earth.3-Your cottage foundation is made up of 800 cubic feet of concrete while the floor is made up of 200 cubic feet of oak. About how many Btu are required to raise the temperature of the foundation and floor by 30 degrees F? Given: 22 Btu per cubic feet per degree F for concrete and 25 Btu per cubic feet per degree F for wood.528,0001,500,000150,000678,000

As an endurance coach, which of the following metabolic markers would hold the MOST value to you in knowing that
As an endurance coach, which of the following metabolic markers would hold the MOST value to you in knowing that your athletes are becoming more aerobically efficient?a. Increased calories expended during training runs.b. Higher RER values measured during training runs.c. Lower RER values measured during training runs.d. Lowered maximal heart rate during training runs. Which of the following statements is considered true regarding ketones?a. Ketones levels between the values of 3-and-5 mmol/L are considered normal following an overnight fast.b. Ketone production occurs predominantly within muscle cells who can then push these compounds into the blood.c. During periods of carbohydrate depletion, oxaloacetate in the liver is converted to glucose to help preserve blood glucose.d. During ketosis production, acetone production is significant which passes predominantly to the muscle to be used as fuel.Eating carbohydrates after a workout or with breakfast is recommended to replenish muscle glycogen stores because these (muscle) stores are typically depleted after a 60-to-90-minute workout or after 12-to-18 hours of fasting.a. Trueb. FalseWhich of the following statements is considered true?a. EPOC (afterburn) is a significant contributor to weight loss and is positively influenced (i.e., elevated) by exercise effort and by exercise duration.b. Lactate is produced predominantly within the type II muscles fibers and is not considered a waste product but is actually a source of fuel.c. The conversion of lactate back to glucose inside both type I and type II muscles fibers can help sustain blood glucose levels. This is falsed. HR demonstrates a linear relationship with VO2 starting from rest through maximal exercise and can be used to accurately quantify expended calories.

1.In order to widen a road, a tree stump needs to be removed. Two backhoes are brought to the site.
1.In order to widen a road, a tree stump needs to be removed. Two backhoes are brought to the site. One backhoe pulls with a force of 2500 N east while the second backhoe pulls with a force of 3000 N northeast. What is the resultant force and its angle with respect to the first backhoe?2.In order to widen a road, a tree stump needs to be removed. Two backhoes are brought to the site. One backhoe pulls with a force of 2500 N east while the second backhoe pulls with a force of 3000 N northeast. What is the resultant force and its angle with respect to the first backhoe?3.A vector, w, with magnitude 250 km/h has bearing 070°.a.Resolve the vector into its components.b.Find two vectors that are not perpendicular to each other that has w as the resultant.4.Is the following statement always, sometimes or never true? Justify your reasoning.|u v|

Suppose the maximum safe average intensity of microwaves for human exposure is 1.00 W/m2Part (a) Part (b) E0 . Early
Suppose the maximum safe average intensity of microwaves for human exposure is 1.00 W/m2Part (a) Part (b) E0 . Early radar units leaked radiation more than modern ones do, which caused identifiable health problems, such as cataracts, for people who worked near them. If a radar unit leaks 6.5 W of microwave radiation uniformly in all directions, what is the closest distance, in centimeters, you can be to the unit and still be considered safe? Assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection. What is the maximum electric field strength , in volts per meter, of the microwave radiation at the maximum safe intensity?

An air-track cart with mass m1=0.24kg and initial speed v0=0.80m/s collides with and sticks to a second cart that is
An air-track cart with mass m1=0.24kg and initial speed v0=0.80m/s collides with and sticks to a second cart that is at rest initially. If the mass of the second cart is m2=0.53kg, how much kinetic energy is lost as a result of the collision? Express your answer to two significant figures and include appropriate units.

a disk with a radical line painted on it, is mounted on an axle perpendicular to it and running through
a disk with a radical line painted on it, is mounted on an axle perpendicular to it and running through its center. it is initially at rest, with the line at -90 degrees. the disk then undergoes constant angular acceleration. after accelerating for 3.1 s, the reference line has been moved part way around the circle (in a counterclockwise direction) to 130 degrees. Given this information, what is the angular speed of the disk after it has traveled one complete revolution (when it returns to its original position at -90 degrees)?

A 0.100-kg toy car is propelled by a compressed spring. The spring is compressed 4.00 cm and has a force
A 0.100-kg toy car is propelled by a compressed spring. The spring is compressed 4.00 cm and has a force constant of 250.0 N/m. Assuming friction to be negligible, find a) the work done by the elastic force of the spring to accelerate the car;b) the speed delivered by the spring to the car.

1A. less than the pressure in the aortaB. greater than the pressure in the aorta While the semilunar valves
Question 1A. less than the pressure in the aortaB. greater than the pressure in the aorta While the semilunar valves are open during a normal cardiac cycle, the pressure in the left ventricle is ___ C. less than the pressure in the left atriumD. None of the choices are correctE. the same as the pressure in the left atrium Question 2The parasympathetic effect on the heart ____A. utilizes the vagus nerveB. involves acetylcholineC. causes an increase in permeability to K and a decrease in permeability to Na and Ca2 D. slows the rate of depolarization in the cells of the SA nodeE. All of the choices are correct Question 3The partial pressure gradients established between the alveolar air and the pulmonary capillary blood induce passive diffusion of O2 and CO2. What is the partial pressure of O2 and CO2 in the alveolar sacs and which way does each gas diffuse in the lungs?A. PO2= 100; PCO2=40; O2 diffuses into the blood, CO2 diffuses out of the bloodB. None of the choices are correctC. PO2= 160; PCO2=46; O2 diffuses into the blood, CO2 diffuses out of the bloodD. PO2= 120; PCO2=46; O2 diffuses out of the blood, CO2 diffuses into the bloodE. PO2= 40; PCO2=46; O2 diffuses out of the blood, CO2 diffuses into the bloodQuestion 4An increase in the glomerular filtration rate ___A. increases the reabsorption of Na and waterB. is caused by a decrease in ANPC. can lead to an increase in urine volumeD. is caused by GnRH release from the hypothalamusE. can act to increase blood pressure when it is too low Question 5Which of the following statements is false?A. Atrial natriuretic factor (ANF) stimulates renin releaseB. Renin triggers angiotensin productionC. Angiotensin stimulates arteriole constrictionD. Angiotensin I is converted to Angiotensin II by ACEE. Aldosterone increases Na reabsorption

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