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4 years ago

Which of these is NOT a characteristic of mammals? a. hair c. ectotherms b. large brain d. endotherms

1 answer:

7 0

Most mammals, including humans are endothermic homeotherms while most fish are ectotherms so the right answer would be ectotherms.

You might be interested in

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant

chubhunter [2.5K]

Answer:

3.2 MN

Explanation:

Given that

Mass of the box, m = 52 kg

Initial velocity of the box, u = 400 m/s

Final velocity of the box, v = 0 m/s

Time taken for the collision, t = 0.0065 s

Using the equation of motion

V = u + at, we turn around and make acceleration, a the subject of the formula. Now we have,

a = (v - u) / t

a = (0 - 400) / 0.0065

a = 61538.5 m/s²

The acceleration(which is negative acceleration or retar.dation actually) is 61538.5 m/s². We then proceed to is this acceleration in the basic Force equation, to get the magnitude of force needed.

Remember,

Force = mass * acceleration

F = ma, we already have our mass and acceleration, all we do is multiply

F = 52 * 61538.5

F = 3200002 N or 3.2 MN

Therefore, the magnitude of the force that acts on the box during collision is 3.2 MN

8 0

3 years ago

How high or low are the crest and trough of a wave?

xxMikexx [17]

That depends on the wavelength itself, like what type of wave it is and where on the spectrometer it is

7 0

3 years ago

How far will u go if your wheel' diameter 34in?

Lapatulllka [165]

Technically you can go forever on and on, but maybe your question was like how many rotations in a certain distance?

4 0

3 years ago

If a light ray from a candle strikes a mirror at an angle of 40° with the normal, at what angle will the ray reflect?. Select on

tekilochka [14]

Answer: The correct answer is option (C).

Explanation:

Law of reflection:

Angle of incident is equal to angle of reflection;∠i=∠r
Incident ray, reflected ray and normal to the reflecting interface at the point of incidence all lie in same plane.

When light ray from candle strikes a mirror at an angle of 40° with the normal, then the angle at which ray reflected back will 40°.

6 0

3 years ago

Read 2 more answers

Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. True or False

Vadim26 [7]

Answer:

True.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. This is ultimately in accordance with the law of conservation of energy, which states that energy cannot be destroyed but can only be converted or transformed from one form to another.

Hence, Mechanical energy that has been ‘lost' to friction isn't really lost but converted into heat energy.

4 0

3 years ago