
Calculate the watts of power expended when a force of 2.0N moves a book 2.4m in a time interval of 1.0 s. Express your answer to two significant figures and include the appropriate units.

How many watts of power do you expend when you exert a force of 0.50N that moves a book 2.1m in a time interval of 1.1s ? Express your answer to two significant figures and include the appropriate units.

Calculate the watts of power expended when a force of 1.8 N moves a book 2.0 m in a time interval of 1.0 M/S

A model rocket leaves the ground, heading straight up at 45m/s . Part A What's its maximum altitude? Express your answer to two significant figures and include the appropriate units. Part B Find its velocity at 1 s? Express your answer to two significant

A woman holds a 1.90mlong uniform 5.0kg pole as shown in (Figure 1) ( its horizontal). A. Determine the force she must exert on the pole at A. Express your answer to two significant figures and include the appropriate units. Enter positive value if the


You pick up a 3.2 kg can of paint from the ground and lift it to a height of 1.4 m . Part A How much work do you do on the can of paint? Express your answer to two significant figures and include the appropriate units. Part B You hold the can stationary

Calculate the tension in a horizontal string that whirls a 1.9kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units

An athlete performing a long jump leaves the ground at a 27.1 ∘ angle and lands 7.73 m away. 1). What was the takeoff speed? Express your answer using three significant figures and include the appropriate units. 2).If this speed were increased by

An athlete performing a long jump leaves the ground at a 27.1 ∘ angle and lands 7.73 m away. 1). What was the takeoff speed? Express your answer using three significant figures and include the appropriate units. 2).If this speed were increased by

Calculate the tension in a horizontal string that whirls a 1.9kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units. 1.9(2.8)^2 .. then divid by 2.3 I

The Achilles tendon is attached to the rear of the foot as shown in Tap image to zoom . A person elevates himself just barely off the floor on the "ball of one foot." Assume the person has a mass of 61 kg and D is twice as long as d. Part A Find the

How many joules of potential energy does a 1.2kg book gain when it is elevated 4.0 ? Express your answer to two significant figures and include the appropriate units.

In a cathoderay tube, electrons are projected horizontally at 1.0×10^6 m/s and travel a horizontal distance 11.5 cm across the tube. How long are the electrons in flight? Express your answer to two significant figures and include the appropriate units.

A rocketpowered hockey puck moves on a horizontal frictionless table. The figure below shows the graphs of vx and vy, the x and ycomponents of the puck’s velocity. The puck starts at the origin. The graph of the Xvelocity is v=8t cm/s and the

Find its density. Express your answer to two significant figures and include the appropriate units How does this compare with the density of water? Express your answer using two significant figures.


A 2.0kg wood block is launched up a wooden ramp that is inclined at a 26 angle. The block's initial speed is 8.0 m/s. The coefficient of kinetic friction of wood on wood is 0.200. a) What vertical height does the block reach above its starting point?

Calculate the density in g/mL {\rm g}/{\rm mL} of 2.0L {\rm L} of gasoline that weighs 1.29kg kg . Express your answer to two significant figures and include the appropriate units

Calculate the work done in lifting a 600N barbell 1.6m above the floor. Express your answer to two significant figures and include the appropriate units.

A hockey puck moving at 37m/s slams through a wall of snow 31cm thick. It emerges moving at 15m/s . Part A Assuming constant acceleration, find the time the puck spends in the snow. Express your answer to two significant figures and include the appropriate

calculate the mass of butane needed to produce 79.7g of carbon dioxide. express your answer to three significant figures and include the apprppriate units

The oxidation of iodide ion by arsenic acid, H3AsO4, is described by the balanced equation 3I−(aq)+H3AsO4(aq)+2H+(aq)→ I3−(aq)+H3AsO3(aq)+H2O(l) If −Δ[I−]/Δt = 4.8×10−4M/s , what is the value of

The oxidation of iodide ion by arsenic acid, H3AsO4, is described by the balanced equation 3I−(aq)+H3AsO4(aq)+2H+(aq)→ I3−(aq)+H3AsO3(aq)+H2O(l) If −Δ[I−]/Δt = 4.8×10−4M/s , what is the value of

Calculate the force of friction that keeps a 80kg person sitting on the edge of a horizontal rotating platform when the person sits 2.4m from the center of the platform and has a tangential speed of 3.2m/s . Express your answer to two significant figures

Mars, on average, is 140 million miles from the Sun. 1 mi = 1609 m . Part #1: Express the distance between Mars and the Sun in meters using powers of 10. Express your answer using two significant figures. Answer: d =2.25×10^11 m Part #2: Express the

A mouse travels along a straight line; its distance from the origin at any time is given by the equation. x= (8.1 cm * s^1)t(2.7cm * s^2)t^2 A) Find the average velocity of the mouse in the interval from t= 0 to t= 1.0 . value=?; unit= ? B)Find the


A mouse travels along a straight line; its distance from the origin at any time is given by the equation. x= (8.1 cm * s^1)t(2.7cm * s^2)t^2 A) Find the average velocity of the mouse in the interval from = 0 to = 1.0 . value=?; unit= ? B)Find the

Problem 21.40 A pair of 10uF capacitors in a highpower laser are charged to 1.7kV. Paige Nieuwenhuis Part A  What charge is stored in each capacitor? Express your answer using two significant figures. Part B  How much energy is stored in each capacitor?

I have done this problem over and over again, but I still keep getting it wrong. What do I need to do? A 1.04x10^3 kg car accelerates uniformly from rest to 12.0 m/s in 2.16 seconds. What is the work done on the car in this time interval? Answer in units

PLEASE HELP WITH PART E AND F THANKS!! Find the direction and magnitude of the following vectors. A⃗ =( 22 m )x^+( 15 m )y^ Express your answer in degrees using three significant figures. θA = THE ANSWER IS34 Part B Express your answer in meters using

What change in kinetic energy does an airplane experience on takeoff if it is moved a distance of 480m by a sustained net force of 5400N ? Express your answer to two significant figures and include the appropriate units.

Calculate the water pressure at the bottom of the 50m {\rm m}high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units

A 9.8kg monkey hangs from a rope, as shown in (Figure 1) . The tension on the left side of the rope is T1 and the tension on the right side is T2. In the figure, θ=15∘ and ϕ=23∘. Determine the tension T1. Express your answer to two significant

Two small charged balls have a repulsive force of 0.20N when they are separated by a distance of 0.90m . The balls are moved closer together, until the repulsive force is 0.58N . How far apart are they now? Express your answer to two significant figures

A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Express your answer to two significant figures and include the appropriate

How much charge is contained in 9kg of protons? Express your answer to two significant figures and include the appropriate units.


How much charge is contained in 9kg of electrons? Express your answer to two significant figures and include the appropriate units.

Find the direction and magnitude of the following vectors. A⃗ =( 22 m )x^+( 15 m )y^ Express your answer in degrees using three significant figures. θA = Part B Express your answer in meters using two significant figures. A⃗  = m Part C B⃗ =( 2.5

Suppose you are asked to find the area of a rectangle that is 2.1cm \rm cm wide by 5.6cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not

Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220m . Express your answer to two significant figures and include the appropriate units.

Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220m m . Express your answer to two significant figures and include the appropriate units

A med tech student pushes a 30kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37 degrees with the horizontal. If the opposing force of friction is 70 N, how much work does he do as he moves the

What is the magnitude of the electric field a distance 3.0mm from an electron? Express your answer to two significant figures and include the appropriate units

Two railroad freight cars with masses 110 Mg and 150 Mg approach with equal speeds of 0.310 m/s . They collide, the lighter car rebounding opposite its original direction at 0.270 m/s. Find the velocity of the heavier car after the collision. Assume the

An electric dipole lies on the xaxis, consisting of a 2.3nC charge at x = 11cm and a +2.3nC charge at x = 11cm . Part A Compute the electric field at the point (–16cm , 0). Find the magnitude of the electric field. Express your answer to two

Find the length of a simple pendulum that has a period of 5.00s . Assume g = 9.81 m/s2. Express your answer to three significant figures and include the appropriate units.


Pressure = weight density × depth Calculate the water pressure at the bottom of the 50mhigh water tower shown in the photo. Express your answer to two significant figures and include the appropriate units

Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A 247 B 375 C 191 D 483 Express your answer to three significant figures and include the appropriate units. My answer was 285 kJ/mol

A person is making homemade ice cream. She exerts a force of magnitude 17 N on the free end of the crank handle, and this end moves in a circular path of radius 0.28 m. The force is always applied parallel to the motion of the handle. If the handle is

Item 4 Two 2.0 masses are 1.0 apart on a frictionless table. Each has 1.0 of charge Part A  What is the magnitude of the electric force on one of the masses? Express your answer using two significant figures. = Part B  What is the initial acceleration of

A dike in Holland springs a leak through a hole of area 0.60cm 2 cm^2 at a depth of 1.4m m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the

A dike in Holland springs a leak through a hole of area 0.60cm2 at a depth of 1.4m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the

A student in the fitness center lifts a weight with m = <81.5> kg from the floor to a height of <2.7> meters in a time of <15.50> seconds. Find the average power exerted by the student during this time. Give your answer in watts (W) and

Item 4 Two 2.0 masses are 1.0 apart on a frictionless table. Each has 1.0 of charge. Part A  What is the magnitude of the electric force on one of the masses? Express your answer using two significant figures. = Try Again; 3 attempts remaining Part B 

A 1.2kg blob of putty moving at 4.0m/s slams into a 1.2kg blob of putty at rest. Calculate the speed of the two stucktogether blobs of putty immediately after colliding. Express your answer to two significant figures and include the appropriate units.

You calculate the area of a 150m x 100.0 m room. How many significant figures should your answer include? a. 1 b. 2 c. 3 d. 4 2?


The top floor of a building is 40m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

What is his kinetic energy when his potential energy reduces to 1000 J? Express your answer to two significant figures and include the appropriate units

Where do I start? Calculate the water pressure at the bottom of the 50m {\rm m}high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units. The question says to neglect the pressure due to

In college softball, the distance from the pitcher's mound to the batter is 43 feet. Part A If the ball leaves the bat at 105 mph , how much time elapses between the hit and the ball reaching the pitcher? Express your answer to two significant figures and

A football is kicked at ground level with a speed of 17.7 m/s at an angle of 39.8 ∘ to the horizontal. How much later does it hit the ground? Answer=> t=_____ s Express your answer using three significant figures and include the appropriate units.

A car takes 11 s to go from v=0m/s to v = 22 m/s at constant acceleration. If you wish to find the distance traveled using the equation d=1/2at2, what value should you use for a? Please help on this i don't know what i should put i think m/s squared but i

A 64 kg hiker climbs to the top of a 3700 mhigh mountain. The climb is made in 5.5 h starting at an elevation of 2900 m. Calculate the average power output in watts. Calculate the average power output in horsepower & Calculate assuming the body is 14%

The handle of a 27kg lawnmower makes a 36∘ angle with the horizontal. If the coefficient of friction between lawnmower and ground is 0.66, what magnitude of force, applied in the direction of the handle, is required to push the mower at constant


Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80.What is the magnitude of the friction force on the filing cabinet?

Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet?

A skier of mass m = 55kg glides down a slope at angle theta = 32∘, as shown in the figure below. The snow is so slippery that you can neglect friction. Find the skier's acceleration. Express your answer using two significant figures. Find the force

You want to get an idea of the magnitude of magnetic fields produced by overhead power lines. You estimate that a transmission wire is about 11 above the ground. The local power company tells you that the line operates at 16 and provide a maximum of 83 to

Three boxes are lined up so that they are touching each other as shown in the figure below. Box A has a mass of 30.0 kg, box B has a mass of 45.0 kg, and box C has a mass of 75.0 kg. An external force (F) pushes on box A toward the right, and the force

the work done in lifting a 600N barbell 1.6m above the floor. What is the gain of potential energy of the barbell when it is lifted to this height? Express your answer to two significant figures and include the appropriate units.

Under the action of a constant net force, a 3.1kg object moves a distance of 15 meters in 8.99 seconds starting from rest. What is the magnitude of this net force? I got the answer of 0.58 Newtons, but the book says the solution is 1.2 Newtons. To get

A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.70 of her regular weight. 1).Calculate the magnitude of the acceleration of the elevator. Express your answer to two significant

What is the molarity of a solution containing 10.g of NaOH in 700.mL of NaOH solution? Express your answer to two significant figures and include the appropriate units.

An object with a mass of 3.09x10^0 kg is subjected to a force of 8.8505x10^2 N directed at an angle of 1.6968x10^2 degrees from the x axis. A second force of 2.98725x10^3 N acting in the negative Y directions is also applied to the object. To two


A sample of sodium reacts completely with 142 g of chlorine, forming 234 g of sodium chloride. What mass of sodium reacted? Express your answer to three significant figures and include the appropriate units.

when i calculate the density from my measurement,mass=154.4, volume=175.00,and got 0.8823 g/cmexp3 as the answer,so do i have to express the answer in scientific notation or round off it? No, you do not need to express the answer in scientific notation

I'm a little confused when it comes to significant figures. Where it doesn't make sense to me is when zeros come before and after a number. For example: My book states that zeros that come before a digit are NEVER significant. Now this makes sense if you

A mass m at the end of a spring oscillates with a frequency of 0.83 Hz . When an additional 770 g mass is added to m, the frequency is 0.65 Hz . Part A What is the value of m? Express your answer to two significant figures and include the appropriate

A rifle is aimed horizontally at a target 50 m away. The bullet hits the target 2.4 cm below the aim point What was the bullet's speed as it left the barrel? Express your answer to two significant figures and include the appropriate units

You are given 23.0 of aluminum and 28.0 of chlorine gas. If you had excess chlorine, how many moles of of aluminum chloride could be produced from 23.0 of aluminum? Express your answer to three significant figures and include the appropriate units.

Problem 22.16 A 7.5 v battery supplies a 3.5 mA current to a circuit for 8.2 Hr . Part A  How much charge has been transferred from the negative to the positive terminal? Express your answer using two significant figures. Part B  How much work has been

A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.25 s after liftoff, the rocket clears the top of its launch platform, 69 m above the ground. After an additional 4.80 s , it is 1.00 km above the ground. Calculate the

A man whose mass is 75kg walks up a stairs each 20cm high in5seconds.calculate the power expended in watts.[assume g=10m\s2

Please help! A young girl with mass 42.5kg is sliding on a horizontal, frictionless surface with an initial momentum that is due east and that has magnitude 94.0kg * (m/s) . Starting at 0s , a net force with magnitude F=( 8.10N/s )*t and direction due west


Find the largest angle for which sine and tangent agree to within two significant figures. Express your answer using two significant figures. Answer in radians ?_?

In a 1dimensional problem, a single force acts on a 10 kg object and is given the equation F=ax+b where a=250 N/m, b=25 N, x is position of object. There is a force acting on the object while that object moves from x=0 to x=2 lasting 3 sec. 1) What is the

A boat moves through the water with two forces acting on it. One is a 2.80×10 3 N forward push by the motor, and the other is a 1.56×10 3 N resistive force due to the water. a)What is the acceleration of the 1312.6 kg boat? Answer in units of m/s^2 b)If

A vector has the components Ax=−37m and Ay=44m. Part A What is the magnitude of this vector? Express your answer to two significant figures and include appropriate units. the answer for part A is help me with b pls 57 m Part B What angle does this vector

A man whose mass is75kg walks up a stairs of 12steps each 20cm high in 5seconds.calculate the power expended in watts.[assume g=10m\s2

The exponential function can be represented as an infinity power series as follows. e^x=1 + x/1! + x^2/2! + x^3/3!+⋯,∞<x<∞ 1. Calculate e (which is the same as e^1) to 4 significant figures by using as many terms of the power series expansion

A car of mass 1335.0 kg is moving at a speed of 60.4 mph when it misses a curve in the road and hits a bridge piling. If the car comes to rest in 0.214 s, how much average power (in watts) is expended in this interval?

A car of mass 1298.7 kg is moving at a speed of 64.0 mph when it misses a curve in the road and hits a bridge piling. If the car comes to rest in 0.234 s, how much average power (in watts) is expended in this interval?

A particular spring has a force constant of 2.6×103 . Part A How much mass would have to be suspended from the vertical spring to stretch it the first 5.6 ? Express your answer using two significant figures. How much more mass would have to be suspended

Two point charges, 20μC and +40μC , are separated by a distance of 17.0cm . What is the magnitude of the electric field at a point halfway between the two charges? Express your answer to two significant figures and include the appropriate units


if a charged plane has a uniform surface charge density of −1.5×10−7C/m2 , what is the magnitude of the electric field just outside the plane’s surface? Express your answer to two significant figures and include the appropriate units.

A 1100kg elevator is lifted at a constant speed of 1.5 m/s through a height of 20 m. Part A How much work is done by the tension in the elevator cable? Express your answer to two significant figures and include appropriate units. Part B How much work is

In a chase scene, a movie stuntman runs horizontally off the flat roof of one building and lands on another roof 2.0m lower. If the gap between the buildings is 4.4m wide, how fast must he run to cross the gap? Express your answer to two significant

In a chase scene, a movie stuntman runs horizontally off the flat roof of one building and lands on another roof 2.0m lower. If the gap between the buildings is 4.4m wide, how fast must he run to cross the gap? Express your answer to two significant

represent each of the following to three significant figures and express each answer in SI units using an appropriate prefix: a)1568(10^5)mm b)0.005 63 mg