If you ever slapped someone or got slapped yourself, you probably remember the burning sensation. Imagine you had the unfortunate occasion of being slapped by an angry person, which caused the temperature of the affected area of your face to rise by 2.4°C (ouch!). Assuming the slapping hand has a mass of 0.9 kg and about 0.150 kg of the tissue on the face and the hand is affected by the incident, estimate the velocity of the hand just before impact. Take the specific heat of the tissue to be 3.8 kJ/kg·K.

Q: What is the correct relationship between the most probable velocity (vmp), average speed (vsp), and…

A: root mean square speed = r m s speed = Vrms= 3RTM Average velocity = Vave= 8RTπM Most probable…

Q: A supersonic car (SSC) has a mass of 9615 kilograms on Earth. The SSC has a fuel consumption rate of…

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Q: The velocity of a particle moving along the x-axis is given by: v (t) = 4 t - 3t?, where v is in…

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Q: 12–13. Tests reveal that a normal driver takes about 0.75 s before he or she can react to a…

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Q: Question 1 : Given object velocity as a function of time from the following data Time (s) |Velocity…

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Q: An object is dropped down in underground pipe and 5 seconds later the sound of the splash is heard.…

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Q: A caterpillar's speed decreases from 0.65cm/s to 0.40cm/s at a rate of -0.04cm/s1 as it climbs a…

A: initial velocity (u) = 0.65 cmsfinal velocity (v) = 0.40 cmsacceleration (a) = -0.04 cms2

Q: An unwary football player collides with a padded goalpost while running at a velocity of 6.50 m/s…

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Q: 2/6 The acceleration of a particle is given by a = -kt, where a is in meters per second squared and…

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Q: A block is moving along the x-axis and its position varies in time according to the expression x =…

A: Given: x = 3.00 m/s2t2 a Position at t = 3.20 sxat t=3.20 = 33.202∴xat t=3.20 = 30.72 m

Q: Time, t (s) Velocity, v (m/s) 4 12 8 42 10 55 The velocity over the time interval 4 s ts 10 is…

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Q: (b) Determine the acceleration at t = 2.0 s. SOLUTION (Use the following as necessary: t and At.)…

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Q: A student drives 1.91 km due west to get coffee before class. The trip to get coffee takes her 7.00…

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Q: 6. A rocket is to be fired vertically upward. The initial mass is Mo, the exhaust velocity -u is…

A: Rocket is an example of the system of variable mass. The mass of the rocket including fuel is…

Q: 1. The motion of a particle which moves along the straight line is defined by the relation x(t) = t³…

A: Given: The motion of the particle is x(t)=t3-9t2+24t-8.  (a) The time at which the velocity of the…

Q: The displacement (in meters) of an object moving in a straight line is given by s=2/t where t is…

A: Given value--- The displacement (in meters) of an object moving in a straight line is given by…

Q: A person drove a car in a straight line, cutting 8.4 km at a time of 0.12 h, then he ran out of fuel…

A: Solution:

Q: A 1400 kilogram car travelling 12 meters per second brakes uniformly to a stop; it takes 6 seconds…

A: Initial velocity=0 Final velocity=12m Time=6sec

Q: A well-thrown ball is caught in a well-padded mitt. If the deceleration of the ball is 2.10×104…

A: acceleration, a = - 2.1 × 104 m/s2  Time, t = 1.85 ms final velocity, v = 0 m/s

Q: a(m/s) The a-t graph of the bullet train is shown. If the train starts from rest, determine the…

A: Case i) From time 0 to 30 seconds, Acceleration (a1) = 0.1tBut a1 =…

Q: An unwary football player collides with a padded goalpost while running at a velocity of 6.50 m/s…

A: (a) From kinematics, the formula for the final velocity of the player be:

Q: A particle with a charge of q = -5.00 nC is moving in a uniform magnetic field of B =(-1.20 T ) î.…

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Q: large accelerations can injure the body, especially if they last for a considerable length of time.…

A: Given:-  We know that the severity index SI = a5/2t.  here t is the duration of acceleration but a…

Q: A box is moving along the x-axis and its position varies in time according to the expression x =…

A: Given that:- Postion of box varies with time.

Q: t time t seconds, the velocity (in m/s) of a bead sliding on a wire is given by the equation:…

A: Given: Velocity at time t is given by: v(t) = 4t3 - 3t2

Q: You run in a straight line for 12min at 6 km/h. You then immediately walk in the same direction an…

A: The objective of this question is to calculate the average speed of a person who runs and then walks…

Q: A race car moves such that its position fits the relationship x = (5.5 m/s)t + (0.65 m/s3)t3 where…

A: It is given that, x = 5.5t + 0.65t3m

Q: Suppose you are watching the destruction of a bridge. The bridge is blown up and the sounds of the…

A: The speed of the sound is 344 m/s.

Q: I have an unusual question. I am getting confused with my graphs. I completed a few graphs and one…

A: Displacement-time graphs demonstrate how a moving object's displacement changes over time. In a…

Q: Given the quantities a = 6.7 m, b = 3.1 s, c = 80 m/s, what is the value of the quantity d = cb² ?

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Q: Q2: A train travels from station (A) to station (B) and back to the station (A) in 1 hour and 45…

A: The total distance covered =80 miles=128.748Km Total displacement =0 m=0 km (the train after a round…

Q: You stand on a top of a lighthouse while your friend is on the ground outside. You peered into the…

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Q: d from point A with a horizontal speed u and subsequently passes through a vertical opening of 5…

A: For top point of vertical opening: vertical path : s =1/2gt12 b =1/2gt12 t1 =2b/g horizontal path: d…

Q: The speed of an object moving with uniform acceleration in the + x direction is 23 cm / s and the x…

A: Given data: The initial position of the object is 14 cm. The final position of the object is -8 cm.…

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.