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2 years ago

Who much force is needed to accelerate a 68 kilogram-skier at a Rate of 1.2 m/sec

1 answer:

7 0

If F =m*a
and the question says how much force the s needed to accelerate a 68kg skier to a rate of 1.2ms^-2
Then F = 68*1.2

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According to Newton's second law of motion, force can be calculated by multiplying an object's mass by its acceleration. If weig

madreJ [45]

You would do m*a so 65kg * 9.8 m/s^2 which equates to 637 Newton’s

4 0

2 years ago

Which of the following statements are true? The internal resistance of a battery decreases with decreasing temperature. A batter

Eddi Din [679]

Answer:

Option B

Explanation:

The obstruction offered by the battery is known as its internal resistance. Electricity is produced by the chemical reactions inside the battery. The pace of the responses is straightforwardly relative to the temperature and the power delivered by the battery increments. In this way, the inward opposition of the battery increments as diminishing the temperature.
The battery is a gadget which generates electrical energy by the chemical reactions that takes place inside it.

In this way, the announcement a battery is a gadget that produces electricity by the transformation of chemical energy into electrical energy is valid.
The potential difference between the terminals of a battery, when no current is streaming into an outer circuit is called emf of the battery and if the potential distinction is measure when the current is streaming into the outside circuit is called terminal voltage .
The battery attempts to move the negative charge from the low potential terminal to the high potential terminal of the battery. The potential vitality of the negative charges is high at the lower potential terminal and the potential vitality of the negative charge is low at the high potential terminal. Along these lines, the battery attempts to move the charges from high potential terminal to low potential terminal.

7 0

2 years ago

Batteries are a source of what type of energy

sergiy2304 [10]

Answer:

Chemical energy

Explanation:

Batteries are chemical energy because its a bunch of little reactions causing the batteries to work

3 0

2 years ago

Read 2 more answers

A 0.500 kg piece of granite is heated 21.5 Â°C by a sitting in the sun and thereby absorbs 8.5 kcal of heat. What is the specifi

Elena L [17]

Answer:

Specific heat of the granite rock = 3387.05 Jkg⁻¹°C⁻¹

Explanation:

We have heat required, H = mcΔT

Mass of granite, m = 0.500 kg

Specific heat of granite, c = ?

Change in temperature, ΔT = 21°C

Heat energy, H = 8.5 kcal = 8500 x 4.184 = 35564 J

Substituting

H = mcΔT

35564 = 0.500 x c x 21

c = 3387.05 Jkg⁻¹°C⁻¹

Specific heat of the granite rock = 3387.05 Jkg⁻¹°C⁻¹

6 0

2 years ago

NEED AN ANSWER ASAP!

m_a_m_a [10]

Choice-D is the correct statement.

4 0

2 years ago