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Alexandra [31]
3 years ago
13

What is acceleration, and what units do we use to measure it? *

Physics
1 answer:
Scrat [10]3 years ago
7 0

Answer:

Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).

Explanation:

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A 2400W electric toaster is connected to a standard 120 V wall outlet. A family
jolli1 [7]

Answer:

1)  energy = 15.6 kWh,  2)    total_cost = $ 2.03

Explanation:

1) The energy dissipated is the product of the power and the time of use In a month it was used t = 6.5 h and the power of the toaster is

P = 2400 W = 2,400 kW

       energy = P  t

       energy = 2,400  6.5

        energy = 15.6  kWh

using rounding to a decimal

        energy = 15.6 kWh

2) The cost of energy is unit_cost = $ 0.13 / kWh

so the total cost

         total_cost = energy    unit_cost

         total_cost = 15.6   0.13

         total_cost = $ 2.028  

rounding to two decimal places

         total_cost = $ 2.03

5 0
3 years ago
Length= 6cm width= 3cm height= 1cm mass= 36g- what is the density
stellarik [79]

Answer;

2 g/cm³ or 2000 kg/m³

Solution;

Density is given by dividing the mass of a substance by its volume.

Density = Mass/volume

Mass = 36 g

Volume = length × width × height

            = 6 cm × 3 cm × 1 cm    

            = 18 cm ³

Therefore;

Density = 36 g/ 18 cm³

             = 2 g/cm³ or 2000 kg/m³

6 0
3 years ago
60. The label on a box of cereal gives the mass of cereal in two units: 978 grams and 34.5 oz. Use this information to find a co
Anastaziya [24]

Answer : The mass of cereal in two units are, 34.815 oz and 978.075 grams respectively.

Explanation :

As there are two systems for measuring the units which are English and Metric system.

The Metric System measured the things in meters, grams, liters, etc and adds prefixes like kilo, milli and centi to the count orders of the magnitude.

The English system measured the things in feet, inches, pounds, mile, etc.

As we are given the mass of cereal in 978 grams that means 987 grams is in metric unit. Now we have to convert metric unit into English unit.

Conversion factor used :  (1 oz = 28.350 g)

As, 28.350 grams = 1 oz

So, 987 grams = \frac{987\text{ grams}}{28.350\text{ grams}}\times 1oz

                        =  34.815 oz

As we are given the mass of cereal in 34.5 oz that means 34.5 oz is in metric unit. Now we have to convert metric unit into English unit.

Conversion factor used :  (1 oz = 28.350 g)

As, 1 oz = 28.350 grams

So, 34.5 oz = \frac{34.5\text{ oz}}{1\text{ oz}}\times 28.350\text{ grams}

                  =  978.075 grams

Therefore, the mass of cereal in two units are, 34.815 oz and 978.075 grams respectively.

7 0
3 years ago
The electric potential at a point in space is -890 V. If a 0.0285 C charge is placed there, what will its potential energy U be?
BabaBlast [244]

Answer: -25.4

Explanation:

Acellus don’t forget the negative sign

5 0
3 years ago
Physical Science, please explain your answer!
Svetach [21]

Answer:

The answer to your question is: 5 N to the west  or to the left

Explanation:

Both forces go to the left, so the net force will be the sum of them.

         Net force = 3 N + 2 N

         Net force = 5 N

         to the left, because the arrows signal to that direction

4 0
3 years ago
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