Start your trial now! First week only $4.99!*arrow_forward*

Question

Suppose a woman does 350 J of work and 9700 J of heat is transferred from her into the environment in the process

What is the change in her internal energy, in joules, assuming she does not consume any food?

What is her percent efficiency?

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew...

A: Mass of stunt performer = 88 kg Length of vine = 12 m Speed at bottom = 7.8 m/s Centripetal accelera...

Q: A bicycle tire is spinning clockwise at 2.00 rad/s. During a time period Δt = 1.70 s, the tire is st...

A: Given: A bicycle tire is spinning clockwise initially at ωi=-2.00 rad/s (negative sign for spinning...

Q: A tuning fork that vibrates at a frequency 680 Hz is placed over an 80 centimeter long cylinder that...

A: Click to see the answer

Q: What is the one thing in common between a helmet, a stretchable cord in bungee jumping, bending the ...

A: Common thing among : a helmet, a stretchable cord in bungee jumping, bending the knees after landing...

Q: A contestant in a winter games event pulls a 60.0 kg block of ice across a frozen lake with a rope o...

A: The mass of the ice block, m = 60.0 kg The coefficient of static friction, μs = 0.1 The coefficient ...

Q: ks) The circuit shown: 9.00 V battery and a 3.50 W light bulb. a) Find the internal resistance of th...

A: Given, Voltage of battery = 9.00 V Power of bulb = 3.50 W

Q: A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage...

A: GIVEN : Vold=335 kVVnew=750 kV (a) Ratio of no. of turns in secondary coil : Ns,newNs,old=VnewVold P...

Q: In an elliptical orbit, the furthest point of the planet from the Sun is called “aphelion”, the clos...

A: Click to see the answer

Q: How long does it takes for 3.25 c charge to pass a point in a circuit if the wire is carrying a curr...

A: charge(Q) = 3.25 C Current (i)= 0.55 A

Q: [RHK Ch. 18, Problem 21] A siphon is a device for removing liquid from a container that is not to be...

A: Given : From Bernoulli's equation we have, P + ρ g h + 12 ρ v2 = constant Where, P is t...

Q: Two point masses 3 kg and 5 kg are at 4 m and 8 m from the origin on x-axis. Locate the position of ...

A: From the origin, if m1 is at a distance r1 and m2 is at a distance r2 then the center of mass of the...

Q: The driver of a car traveling down the interstate slams on the brakes, causing the car to skid to re...

A: We can use equations of kinematics to calculate time taken by car to stop. Equations of kinematics a...

Q: An astronaut with mass 84kg is at rest in space, before firing her water pack to move toward the shu...

A: Given that,Mass of Astronaut,m1=84 kgInitially Astronaut in rest position in space , u1=0 m/sec Mass...

Q: A 0.48 kg block is attached to a spring with a spring constant 0.69 N/m. Both the spring and the bl...

A: mass = 0.48 Kg Spring constant = 0.69 N/m Extension in length of spring = 0.42 m Amplitude (A) = 0.4...

Q: A proton moves in the –x-direction and encounters a uniform magnetic field pointing in the +x-direct...

A: the magnetic force can be expressed as F=qvBsinθ

Q: A traffic light weighing 122 N hangs from a cable tied to two other cablesfastened to a support. The...

A: Click to see the answer

Q: How much work does a supermarket checkout attendant do on a can of soup he pushes 0.320 m horizontal...

A: The given values are, d=0.320 mF=5.10 N

Q: An electric eel can generate a 200V, .2 A shock for stunning its prey. What is the eel's power putpu...

A: To found the power output of an electric eel

Q: (a) What current is needed to transmit 1.00×102 MW of power at 10.0 kV? (b) Find the resistance of ...

A: Electric power: Power (P) is the product of current and voltage. P = IV or P = V2R or P =I2R Un...

Q: Jack and Jill are both helping to fetch a pail of water in a hill that is 16 meters high. Each of th...

A: Given: mass of water m = 5 liter = 5kg distance travelled d = 16m time taken by Jack t1=1.5hrs time...

Q: An arctic weather balloon is filled with 1.56L of helium gas inside a prep shed. The temperature ins...

A: Given:Volume,V1=1.56LTemperature,T1=11°C=284KTemperature,T2=2°C=275 KFind , Volume,V2=..Now,From Cha...

Q: It can be argued that a flat piece of glass, such as in a window, is like a lens with an infinite fo...

A: The expression of lens maker formula is: 1f=1d0+1di Here, f is the focal length of lens, d0 is the d...

Q: A beam resting on two pivots has a length of L = 6.00 m and mass M = 92.0 kg.The pivot under the lef...

A: (a) Condition for rotational equilibrium τnet=0n2l-mgx-MgL2=0n2=mgx+MgL2l

Q: A ball is rolling down an inclined plane. Determine the expression of its acceleration. Refer to the...

A: SOlution:

Q: What is the cutoff wavelength of incident light that will eject photoelectron from copper (Cu)? Ente...

A: Work function = 2 ev red light = 700 nm Green light = 550 nm blue light = 400 nm

Q: 5. An aviation fuel used by a piston engine aircraft transforms 100,042 J of energy through the foll...

A: Input energy by aviation fuel = 100042 JoulesHeat produced in the engine = 46721 JHeat used by trans...

Q: What is the maximum force on an aluminum rod with a 0.100-µC charge that you pass between the poles ...

A: Click to see the answer

Q: A cup of coffee has a mass of 0.377 kg. If you place this cup of coffee on a desk and let is sit the...

A: mass of cup of coffee = 0.377 kg acceleration due to gravity (g) = 9.8 m/s2 To find : force exerte...

Q: A 2kg rock is moving at a speed of 6m/s. What is the magnitude of the force needed to stop the rock ...

A: mass, m = 2 kg initial speed, u = 6 m/s final speed, v = 0 time, t = 0.7 s

Q: Object A and B have identical size and shape, but Object A has a much higher density. The two object...

A: Buoyant force is upward force on the object by the fluid in which it is submerged. Fbuoyancy=VdgV is...

Q: The small piston of a hydraulic lift (Fig. Pl14.8) has a cross-sectional area of 3.00 cm², and its l...

A: Click to see the answer

Q: A cosmic ray electron moves at 7.50×106 m/s perpendicular to the Earth’s magnetic field at an altitu...

A: Radius of an electron will be given by following formula: r=mveB m = mass of the electron = 9.1×10-3...

Q: The coefficient of friction between blocks is us = 0.4, at what angle will the block start sliding i...

A: Coefficient of friction = 0.4Mass = m angle of incline = θInitial speed = 0 ( at rest )

Q: Imagine the xy coordinate plane is the plane of the page. A wire along the z-axis carries current in...

A: We know that a current-carrying conductor induces a magnetic field around it and the direction of th...

Q: An Atwood's machine consists of blocks of masses m1 = 13.0 kg and m2 = 22.0 kg attached by a cord ru...

A: m1 = 13 kg m2 = 22 kg M = 6.6 Kg r = 0.2 m

Q: 4. A bimetallic strip is made of metals A and B. with metal B having a larger expansion than A. On h...

A: 4. we have a bimetallic strip of metals A and B.

Q: b. What is the acceleration of block A in the first 5.00 [s] if both blocks start from rest?

A: a. Free body diagram

Q: (a) What is the speed of a supersonic aircraft with a 17.0-m wingspan, if it experiences a 1.60-V Ha...

A: The width of the wingspan is L = 17 m. The Hall voltage between the wing tips is ε = 1.60 V. The Ear...

Q: Suppose the resistance of a wire is 2 Ω. If the wire is stretched to three times its length, what wi...

A: Let us consider a wire having a resistance,(R) in Ohm. Also (ρ) be the resistivity of the wire in Oh...

Q: (a) Viewers of Star Trek hear of an antimatter drive on the Starship Enterprise. One possibility for...

A: Given quantities: velocity of the antiprotons (v) = 5.00×107 m/s radius of the circular path (r) = 2...

Q: What is the voltage at the location of a 0.0001C charge that has an electric potential energy of 0.5...

A: Click to see the answer