Science

PhysicsQ&A LibraryRubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 20 rubs, at a distance of 7.50 cm per rub, and with an average frictional forceof 40.0 N, what is the temperature increase? The mass oftissues warmed is only 0.100 kg, mostly in the palms and fingers.Start your trial now! First week only $4.99!*arrow_forward*

Question

Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 20 rubs, at a distance of 7.50 cm per rub, and with an average frictional force

of 40.0 N, what is the temperature increase? The mass of

tissues warmed is only 0.100 kg, mostly in the palms and fingers.

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: A 60kg student stands on a very light rigid board that rests on a bathroom scale at each end as show...

A: Given data: Mass of the student is, m = 60 kg Length of the board is, L= 2 m Position of the student...

Q: (A) What is the magnitude of the tangential acceleration of a bug on the rim of a 13.0-in.-diameter ...

A: Given: The diameter of disk d= 13 in. Final Angular speed ω= 79.0 rev/min. Time taken to achieve fin...

Q: Solve (d) (e) only

A: Click to see the answer

Q: just after launch, the space shuttle flies straight up, and it takes 8.0 s to reach a speed of 160 k...

A: Given values: Speed of space shuttle, v=160 km/hr Time taken to reach the speed, t=8.0 s Mass of ast...

Q: When would a swimmer have the most potential energy due to her position? O A. Kicking off the side o...

A: The energy due to the position of a body is called its potential energy. The expression for gravitat...

Q: For problems 21-25, the height, in feet, of a ball is given by the position function s(t) = - 16t2 +...

A: Given information: The function for displacement: S(t) =-16t2+64t+6 The ball will move up until the ...

Q: Use the following information for determining sound intensity. The number of decibels 6 of a sound w...

A: Click to see the answer

Q: A football player starts from rest and accelerates to -3m/s in 0.3s. How far did he travel during th...

A: The initial velocity of the football player u=0 m/s The final velocity of the foot ball player v=-3 ...

Q: A ball tied to a light string is whirled in a perfect horizontal circle with a constant speed of 3.5...

A: Work done is force time displacement in the direction of the force. When the ball moves with a const...

Q: A person bending forward to lift a load "with his back" (Figure a) rather than "with his knees" can ...

A: T×2L3×sin12°=350 N×(L2)+200 N×L⇒T=32350 N2+200 Nsin12°=2705 N=2.705 kN

Q: Please show all work step by step.

A: Expression for momentum - Momentum (P) = Mass(M)×velocity(v) If momentum is same according to pitch...

Q: Fig. 1.1 shows the speed-time graph for a car travelling along a horizontal road. 30- speed m/s 25- ...

A: Point of non uniform acceleration at time t = 5 s in the region t = 4 s to t = 7 s.

Q: A hot air balloon exerts a force of 1200N while lifting a load of 800 N. Whích free-body force diagr...

A: Free body diagram of load:

Q: A boulder falls from a cliff. What is the boulder's acceleration during the fifth second of the fall...

A: 13. Acceleration

Q: An object attached to a coiled spring is pulled down a distance of 11 units from its rest position a...

A: A=Amplitude=−11 unitsT=Time=5 sϕ=Phase=0

Q: A net (unbalanced) external force of 100.0 N acts on an object of mass 20.0 kg. What is the object's...

A: Click to see the answer

Q: Ralph uses a 2000 N force to push his car along a road for 1000 m. It takes him 500 s to do this. Ca...

A: Click to see the answer

Q: If you double the initial speed of a projectile, what happens to that projectiles range? Assume that...

A: Write the relationship between the projectile range and its initial speed. d=v2sin2θg

Q: What is the energy stored in the group of capacitors shown if the charge on the 30 µF capacitor is 0...

A: Given data The charge on the 30 µF capacitors is given as Q1 = 0.90 mC. The one capacitor in a paral...

Q: For a cyclic group, show that every element is a class by itself. Show this also for an Abelian grou...

A: Cyclic groups are abelian. "An element always commutes with powers of itself." The key with cyclic g...

Q: Pellets of mass 2.0 g are fired in parallel paths withspeeds of 120 m/s through a hole 3.0 mm in dia...

A: Given: Mass of Pellets, m=2 g Speed of Pellets, v=120 m/s Diameter of hole, d=3 mm Diameter of beam ...

Q: You push a box up a ramp (friction between the box and the ramp is not negligible). Call the initial...

A: The forces involved in the system are - Force of gravity (Horizontal and Vertical), Normal force, Fr...

Q: An object that is 2kg is being pushed on a table, which has a coefficient of friction of 0.3. Withou...

A: The magnitude of the force of friction between floor and the table is, Ff=μFN=μmg

Q: A jewel smith wishing to buff a finished piece of jewelry attaches a buffing disk to his drill. The ...

A: Radius of the disk (R) = 2.3 mm = 0.0023 m Angular speed (w) = 2.3 * 104 rad/sec = 23000 rad/sec ...

Q: When you use a hand pump to inflate the tires of your bicycle, the pump gets warm after a while. Why...

A: Solution:- Before proceeding to the answer let's see about the adiabatic process, as it plays a sign...

Q: Two bulbs are marked 100 W, 220 V and 60 W, 110 V. Calculate the ratio of their resistances.

A: Click to see the answer

Q: A 51.3-kg pole vaulter running at 9.62 m/s vaults over the bar. Her speed when she is over the bar i...

A: According to the conservation of energy, the initial total energy of an isolated system always remai...

Q: what is the tension of the rope in the picture attached?

A: Given: The external force is 42 N.

Q: Condensation on a glass of ice water causes the ice to melt faster than it would otherwise. If 8.00 ...

A: the temperature of the system remains zero as long as ice exist in the cup.

Q: The drawing shows an intravenous feeding. With the distance shown, nutrient solution (ρ = 1040 kg/m3...

A: Density of nutrient solution = 1040 kg/m3 Height of solution = 0.61 m Since the solution can just ba...

Q: A ball of mass 191 g is thrown with an initial velocity of 25 m/s at an angle of 30° with the horizo...

A: Click to see the answer

Q: A bullet of mass m = 8.00 g is fired into a block of mass M = 200 g that is initially at rest at the...

A: Given information: The mass of the bullet, m=8.00 g=8.00×10-3 kg The mass of the block, M=200 g=200×...

Q: A force of 30 N is applied tangentially to the rim of a solid disk of radius 0.18 m. The disk rotate...

A: Given, Force, F=30 N, Radius, R= 0.18 m, and angular acceleration, α=120 rad/s2.

Q: A Bell student “accidentally” drops a water balloon from the 3rd floor onto an unsuspecting middle s...

A: Given, Time of fall,t=1.2 s Initial velocity, u=0 m/s Acceleration due to gravity, a=g=9.8 m/s2

Q: Any help please? I want to make sure that my answer is correct so i need solution

A: Given: m1 = 3.3 g r1 ⇀ = 3 t i^ +3 t + 2 t 2 j^ ⇒ v1 ⇀=dr1 ⇀dt = 3 i^ +3+ 4 t j^ ⇒ a1 ⇀=...

Q: As shown in the figure below, a bullet is fired at and passes through a piece of target paper suspen...

A: According to conservation of momentum = Initial momentum = Final momentum Mathematically- Pi=Pfmv...

Q: A flywheel with radius of 0.300 mm starts from rest and accelerates with a constant angular accelera...

A: Given data The radius is r=0.300 mm The angular acceleration is, α=0.5 rad/s2 The time is t=2.0 s Th...

Q: a crate is given an initial speed of 3ms-1 up the 25.0 plane shown in fig .below assume kinetic fric...

A: Given: Initial speed of crate u = 3 m/s. Angle of inclination θ=25o Coefficient of kinetic friction ...

Q: Why is it necessary to use a small diameter, thin-walled capillary for holding the sample in the mel...

A: Solution:

Q: 4. Julie is walking around a track at a 2m/s for some exercise. She then decides to start jogging so...

A: Click to see the answer

Q: In the electric currect . It is found that the resistance (measured in the units called ohms) offere...

A: Find the resistance of wire of the same length and material. R1A1=R2A2R1π4D12=R2π4D22R1D12=R2D22R2=R...