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Explain why an athlete loses water when exercising.

The athlete begins to sweat, as exercising releases energy from the body in the form of heat, so the water evaporating from the surface of the skin results in the body cooling down.

Answered by Joy B. • Biology tutor

2156 Views

Translate the following sentence into French: Although I arrived home that night, I didn’t want to enter.

Bien que je sois arrivé à la maison ce soir-là, je ne voulais pas entrer.

Answered by Sarah A. • French tutor

1699 Views

The velocity of a car at time, ts^-1, during the first 20 s of its journey, is given by v = kt + 0.03t^2, where k is a constant. When t = 20 the acceleration of the car is 1.3ms^-2, what is the value of k?

Our task is to find out the value of k, which we can determine from the equations for velocity or acceleration if we know 2 of the 3 variables in either equation. We are given the value of acceleration at...

Answered by Lascelle M. • Maths tutor

8086 Views

Calculate the gravitational force acting on the Moon, caused by the Earth, given that the masses of the Earth and the Moon are 6 x10^24 and 7.3 x10^22, respectively. The distance between the Earth and the Moon is 384 400 km.

The relevant equation to use in solving this problem, from Newton's law of gravitation, is Force = ( universal constant of gravitation x mass of earth x mass of moon)/ (distance between earth and moon sq...

Answered by Adam S. • Physics tutor

26040 Views

What is the difference between classical and operant conditioning?

Classical conditioning and classical conditioning are both forms of learning. Classical conditioning is the pairing of a stimulus with an involuntary response, whereas operant conditioning is the associat...

Answered by Steph V. • Psychology tutor

2071 Views