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schepotkina [342]
3 years ago
13

What laws did dalton use to support the atomic theory.

Physics
1 answer:
kifflom [539]3 years ago
5 0

Answer:

the law of conservation of mass and the law of constant compositionthe law of conservation of mass and the law of constant composition

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The position of a car at time t is given by the function p(t)=t2 2t−4. What is the velocity when p(t)=11? assume t≥0
AysviL [449]

The velocity when function p(t)=11 is 8 .

According to the question

The position of a car at time t  represented by function :

p(t)=t^{2} +2t-4

Now,

When  function p(t) = 11 , t will be

p(t)=t^{2} +2t-4

11 = t²+2t-4

0 = t² + 2t - 15

or

t² +2t-15 = 0

t² +(5-3)t-15 = 0

t² +5t-3t-15 = 0

t(t+5)-3(t+5) = 0

(t-3)(t+5) = 0  

t = 3 , -5  

as t cannot be -ve as given ( t≥0)

so,

t = 3

Now,

the velocity when p(t)=11

As we know velocity = \frac{position}{time}

therefore to get the value of velocity from  function p(t)

we have to differentiate the function with respect to time

\frac{d(p(t))}{dt} =\frac{d}{dt} (t^{2} +2t-4)

v(t) = 2t + 2  

where v(t) = velocity at that time

as t = 3 for  p(t)=11  

so ,

v(t) = 2t + 2  

v(t) = 2*3 + 2  

v(t) = 8

Hence, the velocity when function p(t)=11 is 8 .

To know  more about function here:

brainly.com/question/12431044

#SPJ4

4 0
2 years ago
An electric pole casts a shadow of 24 m long . If the tip of the shadow is 25m far from the top of the pole , how high is the po
Vikentia [17]

Answer:

7 m

Explanation:

a^ + b^=c^

a^ + 24^=25^

a^+576=625

a^=625-576

a^=49

a=7

7 0
3 years ago
What happens to the brightness of bulb a when the switch is closed and bulb b lights up?
eimsori [14]
The problem describes the relationship of "bulb a" and "bulb b" to be in connected in series. When the switch is open then no current can flow, on the other hand, when it is closed, current will pass through.

When only "bulb a" is connected to the battery then more current is flowing to "bulb a" causing it to be bright.

Closing the switch would mean that "bulb b" is already included in the circuit and the battery will push small current to flow around the whole circuit. The more bulbs are connected, the harder for the current to flow because the resistance will be very high.

So the light of "bulb a" will be dimmer.
8 0
4 years ago
A simple ideal Brayton cycle uses argon as the working fluid. At the beginning of the compression, P1 = 15 psia and T1 = 70°F, t
Shtirlitz [24]

B I thing hope this helps

7 0
4 years ago
What two things does the wavelength of peak of the blackbody
Georgia [21]

Answer:

The correct option is;

c. Temperature and color

Explanation:

Based on Wien's Law which can be presented mathematically as follows;

\lambda _{max} = (0.29 \ cm \ K) / T

The wavelength of the peak of the blackbody curve tells the temperature and color.

An example is the Sun that  has a temperature of 5800 K, hence the peak wavelength is given by \lambda _{max} = (0.29 \ cm \ K) / 5800 = 0.00005 \ cm = 500 nano-meter from which the color can be deduced as 500 nano-meter is the wavelength of  yellow light.

8 0
4 years ago
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