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2 years ago

Heat is conducted when one atom or molecule collides with and

Physics

2 answers:

svet-max [94.6K]2 years ago

6 0

A. transfers energy to another atom or molecule.

frosja888 [35]2 years ago

5 0

The correct answer is A. Transfers energy to another atom or molecule.

Explanation:

In physics, heat is produced by the inner energy of a substance or the transfer of heat from one body to another. In terms of inner energy, this is the result of the collision between particles or atoms. This can be explained as every time a particle or atom collides with others part of the energy of the atom is transferred, and this leads to heat. According to this, heat is conducted when one atom or molecule collied with and transfers energy to another atom or molecule.

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A man pushes a heavy cart with a force exerted of 250 Newtons to keep it moving at a constant velocity. What is the kinetic fric

miv72 [106K]

It can't be less than 250 N or the cart wouldn't move at all. That means there is only 1 answer. It's between not enough info or 250 N. The answer is 250 N. If it was any more, there would be acceleration.

3 0

2 years ago

Uranium-238 eventually decays into

GalinKa [24]

Uranium-238 decays by alpha emission into thorium-234, which itself decays by beta emission to protactinium-234, which decays by beta emission to uranium-234, and so on. The various decay products, (sometimes referred to as “progeny” or “daughters”) form a series starting at uranium-238.

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2 years ago

A 70 kg human sprinter can accelerate from rest to 10 m/s in 3.0 s. During the same time interval, a 30 kg greyhound can go from

ladessa [460]

Answer:

$P_1 = 1166.7 Watt$

$P_2 = 2000 Watt$

Explanation:

Average power for the human sprinter is given as

$Power = \frac{\Delta E}{\Delta t}$

so we have

$P = \frac{\frac{1}{2}mv^2 - 0}{\Delta t}$

$P = \frac{\frac{1}{2}(70)(10^2) - 0}{3}$

$P_1 = 1166.7 Watt$

Average power for greyhound is given as

$P = \frac{\frac{1}{2}mv^2 - 0}{\Delta t}$

$P = \frac{\frac{1}{2}(30)(20^2) - 0}{3}$

$P_2 = 2000 Watt$

3 0

2 years ago

A 20 kg truck drives in a circle of radius 4 m at 10m/s. What is the centripetal acceleration of the truck?

asambeis [7]

Answer:

B. 25 m/s/s

Explanation:

Centripetal acceleration is the square of the tangential velocity divided by the radius of curvature.

a = v² / r

Given v = 10 m/s and r = 4 m:

a = (10 m/s)² / 4 m

a = 25 m/s²

4 0

2 years ago

Dierdre drew a diagram to compare the three types of mirrors.

Sholpan [36]

Labels that belong in the marked ares X, Y & Z include;

X: Curves outward

Y: Image may be smaller than object

Z: Image is always virtual

Since the rays never meet, the images formed by convex mirrors are always virtual and smaller than the object, and since they are smaller, the images appear to be further than they actually are.

8 0

2 years ago