3 years ago

A

Physics

2 answers:

madam [21]3 years ago

4 0

Answer:

Calculate the acceleration if it took 2 seconds to slow your car down.Explanation:

skelet666 [1.2K]3 years ago

4 0

I need points dog. I am sorry about the inconvenience michael.

You might be interested in

What is the frequency of UV light that has an energy of 2.39 × 10 -18 J?

Setler [38]

Answer:

3.60 × $10^{15}$ Hz

Explanation:

$\frac{2.39 * 10^{-18} J}{6.63 * 10^{-34} J.s}$

4 0

3 years ago

Endothermic reactions give off heat as they proceed. <br> a. True<br> b. False

Temka [501]

B. False
Endothermic reactions absorb heat.

5 0

3 years ago

Your job is to lift 30 kgkg crates a vertical distance of 0.90 mm from the ground onto the bed of a truck. For related problem-s

Gekata [30.6K]

Answer:

The number of crates is 84580.

Explanation:

mass, m = 30 kg

height, h = 0.9 mm

Power, P = 0.5 hp = 0.5 x 746 W = 373 W

time, t = 1 minute = 60 s

Let the number of crates is n.

Power is given by the rate of doing work.

$P = \frac{n m gh}{t}\\\373 =\frac{n\times 30\times9.8\times 0.9\times 10^{-3}}{60}\\\\n =84580$

7 0

3 years ago

3/4 of pan of brownies was sitting on the counter you decided to eat 1/3 of the brownies in the pan how much of the whole pan of

dexar [7]

Multiply the numerator and denominator of the first fraction by 3. Multiply the numerator and denominator of the second fraction by 4. Subtract. 9 twelfths minus 4 twelfths equals 5 twelfths.

5 0

4 years ago

Read 2 more answers

Beginning 156 miles directly east of the city of Uniontown, a truck travels due south. If the truck is travelling at a speed of

timurjin [86]

Answer:

14.3

Explanation:

The distance s as a function of time can be written as:

$s(t) = \sqrt{156^{2} + (31t)^2}$

The rate of change is the derivative of d with respect to time:

$\frac{ds}{dt} =\frac{961t}{\sqrt{156^{2}+(31t)^{2}}}$

The time t when the track has been traveling for 81 miles is given by:

$81 = 31t\\ t = \frac{81}{31}$

Using t in the previous equation gives:

$\frac{ds}{dt}(\frac{81}{31} ) =\frac{2511}{\sqrt{156^{2}+81^{2}}}=14.3$

5 0

3 years ago