# Homework Help: Science: Physics

## Recent Homework Questions About Physics

**PHYSICS**

The pressure and volume of an ideal monatomic gas change from A to B to C. From A to B, volume remains 0.400 and pressure rises to 4.00x10^5. From B to C, volume changes from 0.400 to 0.200 while pressure remains the same. There is a curved line between A and C and is an ...

**physics**

A projectile is fired at 30.0° above the horizontal. Its initial speed is equal to 172.5 m/s. Assume that the free-fall acceleration is constant throughout and that the effects of the air can be ignored. What is the maximum height reached by the projectile? At what time after...

**Physics**

A person who is 1.1 m tall throws a ball with a speed of 5.2 m/s at an angle of 56 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground? The acceleration due to gravity is 10 m/s2

**Physics**

The launching speed of a certain projectile is 6.8 times the speed it has at its maximum height. Calculate the elevation angle at launching.

**Physics**

A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H = 32.0 m above sea level, directed at an angle theta = 46.9° above the horizontal, and with a speed v = 29.6 m/s. Assuming that air friction can ...

**physics**

A 65.5 kg high jumper leaves the ground with a vertical velocity of 8.1 m/s. How high can he jump? The acceleration of gravity is 9.8 m/s2 .

**PHYSICS**

Two blocks of masses m1 = 4.5kg and m2 = 6.5kg resting on a frictionless area connected by light inextensible chord as shown. A horizontal force F of 33.0 N directed to the right is applied to m1 as shown. Find (A) acceleration and (B) tension of the chord?

**algebra**

in a class of 30 students , there are 22 students who study chemistry but not physics, 4 who study physics but not chemistry and who study neighter chemistry nor physics. how many students in the class study physics

**physics**

to what height should a cylindrical vessel of diameter d be filled with a liquid so that due to force on the verticle surface of the vessel be equal to the force on the bottom

**physics**

A friend in another city tells you that she has two organ pipes of different lengths, one open at both ends, the other open at one end only. In addition, she has determined that the beat frequency caused by the second-lowest frequency of each pipe is equal to the beat ...

**physics**

A 0.014 kg bullet is fired straight up at a falling wooden block that has a mass of 4.0 kg. The bullet has a speed of 700 m/s when it strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t when the collision ...

**PHYSICS**

a girl walks 1km north in 15min.then walks 200m south west in 60sec.what is her average velocity?

**Physics**

How do you find final kinetic energy?

**Physics**

A radioactive isotope of Bismuth undergoes Beta Decay with a half-life of 22 days. How long (in days) will it take the Activity (A) of the sample to decrease to one-ninth of its original value? Assume that the original activity is A0.

**Physics**

In a car crash, Car A rear ends Car B that stopped at a red light. After the crash, Car A and Car B meld together moving at a speed of 14 m/s. Car A has a mass of 1750 kg. Car B has a mass of 2000 kg. Calculate the initial momentum of Car A. So far I have Va=? Ma= 1750 kg Vb=0...

**Physics**

1. The problem statement, all variables and given/known data A 2.0-m measuring stick of mass 0.175 kg is resting on a table. A mass of 0.500 kg is attached to the stick at a distance of 74.0 cm from the center. Both the stick and the table surface are frictionless. The stick ...

**Physics**

At t = 0 s,a particle of mass 7.08 kg starts from rest at the origin and moves with a velocity v = 6.00t^2i(hat) − 6.00tj(hat) + 6.00k(hat) m/s. 1. What is the angular momentum of the particle at t = 0 s I know angular is calculated from moment of inertia * angular ...

**physics**

A box slides down a 30.0 degree ramp with an acceleration of 1.25m/s². Determine the coefficient of Kinetic friction between the box and the ramp. I'm not sure to work it out I draw a picture to see if it would help me but I'm still stuck..

**Physics 1100**

Find theta; and W in the figure below where w1 = 21.0 N, w2 = 34.0 N, and α = 64.0°, assuming that the arrangement is at rest.

**physics**

A pitcher throws a 0.141-kg baseball toward the batter so that it crosses home plate horizontally and has a speed of 42 m/s just before it makes contact with the bat. The batter then hits the ball straight back at the pitcher with a speed of 50 m/s. Assume the ball travels ...

**Physics Check my work please**

A mass is attached to a spring is 0.2 kg. The spring's constant is 40 N/m. The mass is stretched to a position of 0.3 m and released. The final position is 0.1 m. #1) Find the change in potential energy of the system. #2) What is the work done by the spring? #1) Change in P.E...

**Physics**

Using 3 - 4 complete sentences, explain the role of both types of transformers in getting electric energy from an electric power plant (coal-fired, natural gas or nuclear) to our homes.

**PHYSICS !!!**

The diffusion rate for a solute is 4.0 10-11 kg/s in a solvent-filled channel that has a cross-sectional area of 0.50 cm2 and a length of 0.220 cm. What would be the diffusion rate m/t in a channel with a cross-sectional area of 0.30 cm2 and a length of 0.10 cm?

**Physics**

Using 3 – 4 sentences, explain, in your own words, two ways you could cause an electrical current using only a wire and a horseshoe magnet.

**Physics**

Five moles of an ideal gas are compressed isothermally from A to B, What is the work involved if the temperature of the gas is 332 K? Be sure to include the correct algebraic sign. GRAPH: wvw.webassign.n3t/cj8/15-fc-009.gif wvw and n3t need to be retyped in their proper form ...

**Physics Check My Work Please**

A mass is attached to a spring is 0.2 kg. The spring's constant is 40 N/m. The mass is stretched to a position of 0.3 m and released. The final position is 0.1 m. #1) Find the change in potential energy of the system. #2) What is the work done by the spring? #1) Change in P.E...

**PHYSICS**

A MAN RUNS 300M WEST IN 60SEC.THEN RUNS 100M NORTH-WEST IN 20SEC.WHAT IS IT'S AVERAGE VELOCITY IN M/S?

**Physics ._.**

The diffusion constant for the alcohol ethanol in water is 1.24x10^-9 m2/s. A cylinder has a cross-sectional area of 4.10 cm^2 and a length of 2.06 cm. A difference in ethanol concentration of 1.37 kg/m^3 is maintained between the ends of the cylinder. In one hour, what mass ...

**physics**

A boat moving at 13 mi/hr is crossing a river in which the current flowing at 6 mi/hr.ln what direction should the boat head if it is to reach a point on other side of the river directly opposite its starting point. Please help me I really don't know what to do..

**Physics**

Assume the gas is diatomic, calculate how much heat was added to the gas in the process. One mole of ideal gas initially at a temperature of Ti=0 Celsius undergoes an expansion at a constant pressure of 1.00 atm four times its orginal volume

**Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...

**Physics**

Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones. Little does she know ...

**physics**

The diffusion rate for a solute is 4.0E-11 kg/s in a solvent-filled channel that has a cross-sectional area of 0.50 cm^2 and a length of 0.220 cm. What would be the diffusion rate m/t in a channel with a cross-sectional area of 0.30 cm^2 and a length of 0.10 cm? m/t= ??E-11 kg...

**physics**

Heat Q is added to a monatomic ideal gas at constant pressure. As a result, the gas does work W. Find the ratio Q/W. What in the world is this asking??

**Physics**

order the acceleration from least to greatest. a) 30<-object ->50 b) 20<-object c) 20<-object->40 d) 10<-object->30 I think the answer is "dcba" but that isn't right

**Physics**

A boat moving at 9.5 km/hr relative to the water is crossing a river 3.9 km wide in which the current is flowing at 4.9 km/hr. At what angle upstream should the boat head to reach a point on the other shore directly opposite the starting point? (Assume 0 degrees is straight ...

**Physics**

The pressure and volume of an ideal monatomic gas change from A to B to C, as the drawing shows. The curved line between A and C is an isotherm. IMAGE:wvw.webassign.n3t/cj8/15-p-031.gif a)Determine the total heat for the process in joules. b)State whether the flow of ...

**Physics**

Anna notices a pyramid sticking out of an adjacent ravine and she wants to investigate. She notices some vines hanging over the ravine. To her luck, a strong breeze blows some of the vines toward her and she is able to grab one. The vine appears to make 10° angle with the ...

**Physics- Mastering Physics**

Predict how the range of the projectile will change when you change the angle from 45∘, keeping the speed constant. A The range increases with increase in angle and decreases with decrease in angle. B It increases with either an increase or decrease in angle. C It ...

**physics**

An object in equilibrium has three forces exerted on it. A 25 N force acts at 90 from the x-axis and a 48 N force acts at 60. What are the magnitude and direction of the third force

**physics**

A 30kg sled(with rider) slides without friction down a small, ice covered hill. On the first run the sled starts from rest and its speed at the bottom of the hill is 8.50m/s. On the second run the sled starts with a speed of 1.50m/s at the top. Find the speed of the sled at ...

**Physics**

a see saw is balanced. left hand side is 3m long and has an applied force of 4N the righth hand side is 6m long and has an unknown force applied. what is that force?

**Physics**

true or false.Initial velocity is always equal to zero

**PHYSICS**

A Solid Cube Of Steel Has Each Side 10cn Long.Find Its Mass If The Density Of Steel Is 6.5g/cm

**physics**

four particles of masses 1kg, 2kg,3kg, and 4kg are at vertices of a rectangle of sides a and b.if a=1m and b=2m find the location of the center of mass

**physics**

a persons heart and head are 1.3 meter and 1.8 meter above the feet,respectively.determine the potential energy of 0.5 kg of blood in the heart relative to feet and head

**physics**

A hot air balloon is ascending with a velocity of 5.0m/s. A 5.0kg mass is dropped from this balloon at a height of 80m. How much time will pass before the mass hits the ground

**Physics**

The circular blade on a radial arm saw is turning at 293 rad/s at the instant the motor is turned off. In 17.9 s, the speed of the blade is reduced to 60 rad/s. Assume the blade to be a uniform solid disk of radius 0.17 m and mass 0.400 kg. Find the magnitude of the net torque...

**physics**

A uniform horizontal beam 5.00 m long and weighting 2.88 102 N is attached to a wall by a pin connection that allows the beam to rotate. Its far end is supported by a cable that makes an angle of 53.0° with the horizontal (Figure (a)). If a person weighing 5.99 102 N stands ...

**Physics**

Using a ramp of length 2m, you apply a 150N force to move a 20kg object a vertical distance of 1m. How much work does gravity do on the object?

**Physics**

Using a ramp length of 2m, you apply a 150N force to move a 20kg object a vertical distance of 1m. How much work did you do on the object?

**physics**

A block of mass 0.941 kg is kept at rest as i compresses a horizontal mass-less spring (K=87.5 N/m) by 9.91 cm. As the block is released, it travels 0.528 m on a rough horizontal surface before stopping. The acceleration of gravity is 9.8 m/s^2. Calculate the coefficient of ...

**physics**

A 72 kg man jumps fro a window 1.5 m above a sidewalk. The acceleration of gravity is 9.81 m/s^2. a) what is his speed just before his feet strike the pavement? Answer in units of m/s. b) If the man jumps with his knees and ankles locked, the only cushion for his fall is ...

**physics**

An archer pulls her bowstring back 0.488 m by extending a force that increases uniformly from zero to 251 N. What is the equivalent spring constant of the bow? Answer in units of N/m. How much work does the archer do in pulling the bow? Answer in units of J.

**physics**

An archer pulls her bowstring back 0.488 m by extending a force that increases uniformly from zero to 251 N. What is the equivalent spring constant of the bow? Answer in units of N/m.

**physics**

On a frozen pond, a 10 kg sled is given a kick that imparts to it an initial speed of 6.2 m/s. The coefficient of kinetic friction between sled and ice is 0.14. Find the distance the sled moves before coming to rest. The acceleration of gravity is 9.8 m/s^2. Answer in units of m.

**physics**

A 12 g bullet is accelerated in a rifle barrel 69.2 cm long to a speed of 864 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.

**physics**

A 2.25 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 19.6 N. Find the speed of the block after it has moced 4.72 m. Answer in units of m/s.

**Physics**

The block shown in (Figure 1) has mass m = 7.0 kg and lies on a fixed smooth frictionless plane tilted at an angle θ = 22.0 ∘ to the horizontal. If the block starts from rest 15.2 m up the plane from its base, what will be the block's speed when it reaches the ...

**Physics**

A river flows toward the East at 1.5 m/s. Steve can swim 2.2 m/s in still water. If he wishes to cross the river so that his direction is northward, what direction relative to the water must he swim?

**Physics**

Alex comes across a deep ravine. She was planning on this as she packed a 3.8 m portable telescoping extension ladder. It has a mass of 15 kg. She was told that in order to get to the skull’s last known location, she must get across this 2 m gap. ------- | \3.8m | \ _|_2m \...

**College Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...

**College Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...

**physics**

a body of mass 5kg falls from a height of 10m above the ground. what is the kinetic energy of the body just before it strikes the ground answers K.E =1/2mg'2

**physics**

If 0.055 kg of ice at 0 ∘C is added to 0.330 kg of water at 32 ∘C in a 0.100-kg aluminum calorimeter cup, what is the final temperature of the water?

**physics**

A laser with a power output of 2 mW at a wavelength of 400 nm is projected onto a calcium metal surface. What power is carried away by the electrons? The binding energy of the metal is 2.31 eV.

**physics**

On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by 45.0 °C in 120 s. The specific heat of spaghetti is 3760 J/kg °C and the microwaves are absorbed over a circular area 20.0 cm in diameter. What is the peak electric field ...

**physics**

A severely myopic patient has a far point of 5.00 cm. By how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? Assume the image at the back of the eye is formed 0.2 m from the eye's lens.

**Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...

**Physics**

What is the difference between Electro-Motive-Force and Potential-Difference?

**Physics**

A 0.60 kg mass is attached to a 0.6 m string and displaced at an angle of 15 degrees before it is released. 1)What is the potential energy of the pendulum? 2) What is the angular frequency of the pendulum? What is the height of its displacement? 4) What is the velocity of the ...

**Physics**

Water enters a pipe with a cross sectional area of 3.0 cm^2 with a velocity of 3.0 m/s. The water encounters a constriction where its velocity is 15 m/s. What is the cross sectional area of the constricted portion of the pipe?

**science**

I did a physics experiment and now i need help with the matlab fit. can someone tell me how to do this fit in matlab? a1*[sin(a2(x-a3))/(a2(x-a3)]^2*[cos(a4(x-a3))]^2 i have a program that fits a graph to a function i just ask how to write this function.

**physics**

a beam of electron 13.0 ev is used to bombard gaseous hydrogen. what series of wavelengths will be emitted?

**Physics**

A nonuniform cylinder (radius = 0.14 m, center-of-mass rotational inertia = 2.21×10^-2 kg·m^2, mass = 1.36 kg) starts from rest and rolls without slipping down a plane with an angle of inclination of 24.0 degrees. How long does it take to travel 1.72 m along the incline? ...

**Physics**

A block with a mass m = 3.50 kg sits on a surface with a coefficient of static friction µs = 0.520. A spring with spring constant k = 75.0 N/m is hooked onto the block, and is slowly pulled horizontally, gradually stretching the spring. (a) When the spring is stretched 10.0 ...

**physics**

Determine if the tow truck below must use mode 4 drive streets to climb the slope and the weight of the tow car is 3500kg weight of the car is 1800kg Coefficient of friction between the tires and the roadway is 0.3

**physics**

A car of mass 800kg is climbing an incline at 10 degrees to the horizontal. Determine the increase in potential energy of the car mass s it moves a distance of 50m up the incline

**physics**

frictional force

**Physics**

Joan comes across a deep ravine. She was planning on this as she packed a 3.8 m portable telescoping extension ladder. It has a mass of 15 kg. She was told that in order to get to the skull’s last known location, she must get across this 2 m gap. --- | \3.8m | \ __|_2m\____...

**Physics**

A spring has a spring constant that is 120 N/m, and has a 0.1 kg block attached to it. The spring and mass sit on a horizontal surface that has no friction. The block is pulled 0.2 m and then released. Please find the frequency of the oscillations, the period of the ...

**physics**

A stretched string of length 168 cm vibrates in its nth mode. The separation distance from node to antinode is 21 cm . What is the value of n?

**physics**

Engine oil (η = 0.20 Pa⋅s) passes through a fine 2.60-mm-diameter tube that is 8.60 cm long. What pressure difference is needed to maintain a flow rate of 7.8 mL/min ? So what i did was (7.8Ee-3 /60) = π P (1.3e-3) ^4 /(8* 0.086*0.2) I get 1.99E5 but its not ...

**physics**

A scuba tank, when fully submerged, displaces 15.7 L of seawater. The tank itself has a mass of 13.9 kg and, when "full," contains 3.20 kg of air. The density of seawater is 1025 kg/m3. Assume that only its weight and the buoyant force act on the tank. Determine the magnitude ...

**physics**

A typical red blood cell has a mass of 3.0 10-16 kg. A blood sample placed in a centrifuge is subjected to a force of 4.6 10-11 N when the centrifuge is operated at 138 rev/s. What is the diameter of the centrifuge?

**physics**

How does the concept of resonance work?

**Physics**

Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones. Little does she know ...

**Physics**

The asteroid EROS has a mass of 7.4x10+15kg. A 103kg astronaut stands on the surface, 33km from the centre of the asteroid. What weight does she experience ? Give your answer in Newtons. Take the Gravitational constnat, G, to be 6.67x10-11.

**Physics**

How does using the concept of resonance determine the speed of sound an in experiment? In other words, I'm wondering how the concept of resonance works

**physics**

Explain two different reasons why fibreglass is used to fill the space between the concrete block and the metal casing.

**Physics**

What is the mass of a copper wire that will give a wire, 0.20mm in diameter, a resistance of 400 ohms can you please show me the formulas

**Physics**

In a container of negligible mass, 0.100 kg of steam at 110°C and atmospheric pressure is added to 1.00 kg of water at 20.0°C. (a) If no heat is lost to the surroundings, what is the final temperature of the system? (b) At the final temperature, how many kg of steam are ...

**Physics**

Three charges are located along the x axis as shown in the drawing. The mass of the -1.2 uC is 4.0×10^-9 kg. Determine the magnitude and direction of the acceleration of the -1.2 uC charge when it is allowed to move if the other two charges remain fixed. I need help ...

**Physics**

a 0.15 kg sample of Alloy is heated 540°C. it is then quickly placed in 400 g of H2O at 10°C which is contain in a 200 g aluminum cup. the final temperature of the mixture is 20. 5 °C. calculate the specific heat of alloy.

**Physics**

Draw areal velocity versus time graph for Mars.

**physics**

Shows three boxes connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The mass of the boxes are mA = 5 kg, mB = 2 kg, and mC = 3kg. When the system is released from rest, Calculate (a) the acceleration of the system ...

**physics**

water and glass with refractive index of 1.5 are interfaced.if the incident ray are from the water makes an angle 60 degrees with the normal.find the direction of the reflected and refracted rays(given that refractive index of glass to water=1.33)

**PHYSICS**

a 72N force accelerates mass m, by 5.0 m/s^2 the same force acts on another mass m2 and imparts to it an acceleration of 20.0 m/s^2. what acceleration will the same force impart to the two masses when they are joined?

**physics**

formular for looking maximum speed reached

**Physics**

In this sound interferometer, sound waves enter at A and travel to C via paths ABC and ADC. the intensity of the sound can be determined by the microphone placed at C. The length of the path ADC can be changed by a sliding tube. The frequency is fixed at a certain value and ...