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crimeas [40]
4 years ago
7

A tectonic plate near Niihau, an island in Hawaii, grows at an average rate of 11 cm/year. If the rate of plate expansion double

s, how many more centimeters will the plate grow in 3 years, compared to the present rate?
A) 30 cm more

B) 33 cm more

C) 66 cm more

D) 122 cm more
Physics
2 answers:
Nitella [24]4 years ago
6 0

Answer: Option C: 66 cm more

Explanation: We know that the actual rate is 11 cm per year, if this rate is doubled, then the new rate is 11*2 cm per year = 22cm per year.

Now, if in one year the plate grows 22 cm, then in 3 years the plate will grow 3 times 22 cm, this is:

22cm*3 = 66cm

Then the right answer is C, 66 cm more.

RideAnS [48]4 years ago
5 0

Answer:

C, 66

Explanation:

11*2 is 22 and 22*3 is 66

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a 1 gram spiders sits on a platform rotating at 78 rpm. the spider is 15 cm from the centre disk. find the speed of the spider
olga nikolaevna [1]

The spider is traveling in a circle with radius = 15cm

The circumference of any circle = <em>2 pi (radius)</em>
The circumference of the spider's path = 2 pi (15 cm) = 30 pi cm

The spider completes a trip around this path 78 times per minute.
Its speed, relative to you, is   

                               (78) x (30 pi) cm/min =

                                       2,340 pi cm/min =  7,351.33 cm/min =

                                     <em>  73.5133 meter/min =</em>

                                       <em>4.411 km/hr =</em>

                                         <em>2.74  miles/hour

</em>
(After the last appearance of pi,
all numbers are rounded.)<em>

</em>
8 0
3 years ago
Timed plz hurry
Jobisdone [24]

Answer:

True

Explanation:

4 0
3 years ago
Read 2 more answers
ifif it takes 1-minute for 45 c of charge to pass a point in an electric circuit what is the current through the circuit?​
Rudiy27

Answer:

45C in a minute is

45/60 C in a second

.75 C in a second is 3/4 of an ampere.

Explanation:

5 0
3 years ago
A car has a mass of 1500. It is traveling north a 8 m/s. What is the cars momentum
Mama L [17]
Momentum = mass x velocity
= 1500 x 8
= 12000 kg m/s
7 0
3 years ago
A 2.4 m long rod of mass m1 = 14 kg, is supported on a knife edge at its midpoint. A ball of clay of mass m2 = 3.5 kg is dropped
Mashutka [201]

Explanation:

It is known that;

            L_{i} = L_{f}

Now, we need to calculate the value of L, that is, angular momentum.

Therefore,

                   L= mvr

where,   m = mass

              v = velocity

              r = radius

Hence,

               L = m(\sqrt{2gh}) \times r

So,

              L = (2.2 \times (\sqrt{2 \times 9.81 \times 1.4}) \times 0.9)

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Thus, we can conclude that angular momentum of the rod and clay system about the point of support immediately after the inelastic collision is 10.37 Js.

7 0
3 years ago
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