All categories

4 years ago

What two simple machines are found in a bike?

Physics

1 answer:

omeli [17]4 years ago

3 0

I think it's a pulley and a lever.

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Which type of light is emitted from objects with the highest temperatures?.

Flura [38]

Incandescence is light at high temp

8 0

3 years ago

if you do 100 j of work to elevate a bucket of water, what is the gravitational potential energy relative to its starting positi

Ymorist [56]

W=gPE the work done on the bucket is equal to the gravitational PE so PE=100j

8 0

3 years ago

Atoms are electrically neutral because there are an equal number of protons in the nucleus and In the cloud around the nucleus

Alborosie

Answer:

Atoms are electrically neutral because there are an equal number of protons in the nucleus and In the cloud around the nucleus.

Explanation:

The atoms that are the building block of matter consist of protons, neutrons, and electrons.
The protons are positively charged and the electrons are negatively charged particles.
The neutrons are negatively charged particles.
The atoms in its stable natural state consist of an equal number of protons and electrons.
Thus an atom has a neutral charge in its natural state.

4 0

3 years ago

Select the phrases that correctly describe density. Select one or more: a. Density is a physical property. b. Density determines

Serga [27]

Answer:

Options (A), (B), (D), and (E).

Explanation:

Density is a physical property that describes the relationship between mass and volume. This property shows whether an object will float or it will get sink. The density of substances changes with the changing temperature, as both are inversely proportional to each other.

Mathematically, density can be written as,

Density = $\frac{mass}{volume}$

ρ = $\frac{m}{v}$ , Where, ρ = density, m = mass, v = volume

Thus, the correct answers are options (A), (B), (D), and (E).

6 0

3 years ago

You drive your car from home at an

kondaur [170]

Answer:

60 km/h

Explanation:

In the first part of the trip, the speed is

v = 80 km/h

while the time interval is

t = 3 h

So, the distance covered is:

d = vt = (80)(3)= 240 km

The problem states that this distance is half distance between home and the destination - so, the total distance between home and the destination is

$D=2d=2(240)=480 km$

The time taken to cover the second part of the trip is 5 h, so the total time taken is

T = 3 h + 5 h = 8 h

Therefore, the average velocity for the entire trip is

$v=\frac{D}{T}=\frac{480}{8}=60 km/h$

3 0

3 years ago