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krek1111 [17]
3 years ago
11

How does a distance-time graph show you which direction the runner is moving? Use your own words and science vocabulary.

Physics
1 answer:
Dmitry [639]3 years ago
8 0

In a distance time graph, when the x and y values are positive (in first quadrant), the runner is moving forward.

While, if the distance value ( in the y axis) is negative, the runner is moving backwards ( towards the start) .

Hope it helps :)

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A lead mass is heated and placed in a foam cup calorimeter containing 50.0 ml of water at 18.0°c. the water reaches a temperatur
maria [59]
Assuming that there is no heat loss, and the cup is perfectly insulated, all of the energy lost by the lead will be absorbed by the water.
The heat absorbed is given by:
Energy = mass * specific heat capacity * change in temperature
The specific heat capacity of water is 4.18 joules per gram.

In order to compute the mass, we will use the fact that the density of water is one gram per milliliter. Therefore, the mass of water is 50 grams.

Now,
Q = 50 * 4.18 * (20 - 18)
Q = 418 J

418 Joules of energy were released by the lead.
4 0
3 years ago
It requires 0.30 kJ of work to fully drive a stake into the ground. If the average resistive force on the stake by the ground is
LenaWriter [7]

Answer:

Length of the stake will be 0.3623 m

Explanation:

We have given energy required to fully drive a stake into ground = 0.30 KJ = 300 J

Average resistive force acting on the floor is equal to F = 828 N

We have to find the length of the stake

We know that work done is given by

W = Fd, here W is work done , F is average force and d is the length of the stake

So 300 = 828×d

d = 0.3623 m

So length of the stake will be 0.3623 m

6 0
3 years ago
A 12-V battery maintains an electric potential difference between two parallel metal plates separated by 10 cm. What is the elec
Sauron [17]

Answer:

The electric field between the plates is 120 V/m.

(c) is correct option.

Explanation:

Given that,

Potential difference = 12 volt

Distance = 10 cm = 0.1 m

We need to calculate the electric field between the plates

Using formula of electric field

E = \dfrac{V}{d}

Where, V = potential difference

d = distance between the plates

Put the formula

E =\dfrac{12}{0.1}

E=120\ V/m

Hence, The electric field between the plates is 120 V/m.

4 0
3 years ago
Explain how electric current is able to flow
amid [387]

Answer:

Electric current is described as moving from the positive to the negative end of the circuit. Electrons are able to flow in conductors, usually metals, because in metallic bonding the outer electrons of the metal atoms flow freely around between atoms.

Explanation:

5 0
3 years ago
25. Which units would be the most appropriate to use to measure the degree of attraction between two objects due to their mass?
Gnom [1K]
The attraction between two objects is force.
As such, if you don't describe the degree of attraction
in units of force, you're doomed.

Whether to use micronewtons, millinewtons, newtons,
giganewtons, ounces, pounds, or tons, really depends on
the size of the force, which in turn depends on the masses
of the two objects and the distance between them.  You'll
want to select the unit that produces the most convenient
number.  And of course, you'll want to favor the SI units.
8 0
3 years ago
Read 2 more answers
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